Red Hat JBoss Enterprise Application Platform 7.0 Configuration Guide EAP En US
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Red Hat JBoss Enterprise
Application Platform 7.0
Configuration Guide
For Use with Red Hat JBoss Enterprise Application Platform 7
Red Hat Customer Content
Services
Red Hat JBoss Enterprise Application Platform 7.0 Configuration Guide
For Use with Red Hat JBoss Enterprise Application Platform 7
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Abstract
This document provides a practical guide for administrators to configure Red Hat JBoss Enterprise
Application Platform 7.
Table of Contents
Table of Contents
. . . . . . . . . .1.. .OVERVIEW
CHAPTER
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6. . . . . . . . . .
.CHAPTER
. . . . . . . . .2.. .STARTING
. . . . . . . . . AND
. . . . .STOPPING
. . . . . . . . . .JBOSS
. . . . . . EAP
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7. . . . . . . . . .
2.1. STARTING JBOSS EAP
7
2.2. STOPPING JBOSS EAP
8
2.3. RUNNING JBOSS EAP IN ADMIN-ONLY MODE
8
2.4. SUSPEND AND SHUT DOWN JBOSS EAP GRACEFULLY
10
2.5. STARTING AND STOPPING JBOSS EAP (RPM INSTALLATION)
12
2.6. POWERSHELL SCRIPTS
15
.CHAPTER
. . . . . . . . .3.. .JBOSS
. . . . . . EAP
. . . . .MANAGEMENT
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .16
...........
3.1. ABOUT SUBSYSTEMS, EXTENSIONS, AND PROFILES
16
3.2. MANAGEMENT USERS
16
3.3. MANAGEMENT INTERFACES
19
3.4. CONFIGURATION DATA
22
3.5. FILE SYSTEM PATHS
29
3.6. SYSTEM PROPERTIES
33
3.7. MANAGEMENT AUDIT LOGGING
35
. . . . . . . . . .4.. .NETWORK
CHAPTER
. . . . . . . . . .AND
. . . .PORT
. . . . . CONFIGURATION
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .41
...........
4.1. INTERFACES
4.2. SOCKET BINDINGS
41
43
4.3. IPV6 ADDRESSES
47
. . . . . . . . . .5.. .JBOSS
CHAPTER
. . . . . . EAP
. . . . .SECURITY
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .49
...........
.CHAPTER
. . . . . . . . .6.. .JBOSS
. . . . . . EAP
. . . . .CLASS
. . . . . . LOADING
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .50
...........
6.1. MODULES
50
6.2. MODULE DEPENDENCIES
6.3. CREATE A CUSTOM MODULE
6.4. DEFINE GLOBAL MODULES
51
52
53
6.5. CONFIGURE SUBDEPLOYMENT ISOLATION
6.6. DEFINE AN EXTERNAL JBOSS EAP MODULE DIRECTORY
6.7. DYNAMIC MODULE NAMING CONVENTIONS
54
54
55
.CHAPTER
. . . . . . . . .7.. .DEPLOYING
. . . . . . . . . . .APPLICATIONS
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .56
...........
7.1. DEPLOYING APPLICATIONS USING THE MANAGEMENT CLI
56
7.2. DEPLOYING APPLICATIONS USING THE MANAGEMENT CONSOLE
58
7.3. DEPLOYING APPLICATIONS USING THE DEPLOYMENT SCANNER
7.4. DEPLOYING APPLICATIONS USING MAVEN
7.5. DEPLOYING APPLICATIONS USING THE HTTP API
7.6. CUSTOMIZING DEPLOYMENT BEHAVIOR
61
63
65
65
. . . . . . . . . .8.. .DOMAIN
CHAPTER
. . . . . . . .MANAGEMENT
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .72
...........
8.1. ABOUT MANAGED DOMAINS
8.2. NAVIGATING DOMAIN CONFIGURATIONS
8.3. LAUNCHING A MANAGED DOMAIN
8.4. MANAGING SERVERS
8.5. MANAGED DOMAIN SETUPS
72
74
76
80
84
8.6. MANAGING JBOSS EAP PROFILES
86
.CHAPTER
. . . . . . . . .9.. .CONFIGURING
. . . . . . . . . . . . . JVM
. . . . SETTINGS
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .88
...........
9.1. CONFIGURING JVM SETTINGS FOR A STANDALONE SERVER
88
9.2. CONFIGURING JVM SETTINGS FOR A MANAGED DOMAIN
88
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9.3. DISPLAYING THE JVM STATUS
90
9.4. SPECIFYING 32 OR 64-BIT JVM ARCHITECTURE
90
.CHAPTER
. . . . . . . . .10.
. . .MAIL
. . . . .SUBSYSTEM
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .92
...........
10.1. CONFIGURING THE MAIL SUBSYSTEM
92
10.2. CONFIGURING CUSTOM TRANSPORTS
92
. . . . . . . . . .11.
CHAPTER
. . .CONFIGURING
. . . . . . . . . . . . . WEB
. . . . .SERVICES
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .95
...........
.CHAPTER
. . . . . . . . .12.
. . .LOGGING
. . . . . . . . .WITH
. . . . .JBOSS
. . . . . . EAP
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .96
...........
12.1. ABOUT SERVER LOGGING
96
12.2. ABOUT APPLICATION LOGGING
12.3. VIEWING LOG FILES
12.4. ABOUT THE LOGGING SUBSYSTEM
12.5. CONFIGURING LOG CATEGORIES
99
102
103
111
12.6. CONFIGURING LOG HANDLERS
12.7. CONFIGURING THE ROOT LOGGER
12.8. CONFIGURING LOG FORMATTERS
12.9. LOGGING PROFILES
112
131
132
134
. . . . . . . . . .13.
CHAPTER
. . .DATASOURCE
. . . . . . . . . . . . .MANAGEMENT
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .138
............
13.1. ABOUT JBOSS EAP DATASOURCES
13.2. JDBC DRIVERS
138
138
13.3. CREATING DATASOURCES
144
13.4. MODIFYING DATASOURCES
13.5. REMOVING DATASOURCES
147
148
13.6. TESTING DATASOURCE CONNECTIONS
13.7. XA DATASOURCE RECOVERY
149
149
13.8. DATABASE CONNECTION VALIDATION
153
13.9. DATASOURCE SECURITY
13.10. DATASOURCE STATISTICS
155
156
13.11. CAPACITY POLICIES
13.12. ENLISTMENT TRACING
158
161
13.13. EXAMPLE DATASOURCE CONFIGURATIONS
161
. . . . . . . . . .14.
CHAPTER
. . .CONFIGURING
. . . . . . . . . . . . . TRANSACTIONS
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .184
............
14.1. TRANSACTIONS SUBSYSTEM CONFIGURATION
14.2. TRANSACTION ADMINISTRATION
184
186
. . . . . . . . . .15.
CHAPTER
. . .ORB
. . . . CONFIGURATION
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .192
............
15.1. ABOUT COMMON OBJECT REQUEST BROKER ARCHITECTURE (CORBA)
192
15.2. CONFIGURE THE ORB FOR JTS TRANSACTIONS
192
.CHAPTER
. . . . . . . . .16.
. . .JAVA
. . . . .CONNECTOR
. . . . . . . . . . . . ARCHITECTURE
. . . . . . . . . . . . . . .(JCA)
. . . . . MANAGEMENT
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .194
............
16.1. ABOUT THE JAVA CONNECTOR ARCHITECTURE (JCA)
194
16.2. ABOUT RESOURCE ADAPTERS
16.3. CONFIGURING THE JCA SUBSYSTEM
194
194
16.4. CONFIGURING RESOURCE ADAPTERS
198
16.5. CONFIGURE MANAGED CONNECTION POOLS
16.6. VIEW CONNECTION STATISTICS
201
202
. . . . . . . . . .17.
CHAPTER
. . .CONFIGURING
. . . . . . . . . . . . . THE
. . . . WEB
. . . . .SERVER
. . . . . . . .(UNDERTOW)
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .203
............
2
17.1. UNDERTOW SUBSYSTEM OVERVIEW
203
17.2. CONFIGURING BUFFER CACHES
17.3. CONFIGURING A SERVER
204
205
17.4. CONFIGURING A SERVLET CONTAINER
206
Table of Contents
17.4. CONFIGURING A SERVLET CONTAINER
17.5. CONFIGURING HANDLERS
206
207
17.6. CONFIGURING FILTERS
208
17.7. CONFIGURE THE DEFAULT WELCOME WEB APPLICATION
17.8. CONFIGURING HTTPS
210
212
17.9. CONFIGURING HTTP SESSION TIMEOUT
17.10. CONFIGURING HTTP-ONLY SESSION MANAGEMENT COOKIES
212
212
17.11. CONFIGURING HTTP/2
213
17.12. CONFIGURING A REQUESTDUMPING HANDLER
215
.CHAPTER
. . . . . . . . .18.
. . .CONFIGURING
. . . . . . . . . . . . . REMOTING
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .218
............
18.1. ABOUT THE REMOTING SUBSYSTEM
218
18.2. CONFIGURING THE ENDPOINT
220
18.3. CONFIGURING A CONNECTOR
18.4. CONFIGURING AN HTTP CONNECTOR
221
221
18.5. CONFIGURING AN OUTBOUND CONNECTION
18.6. CONFIGURING A REMOTE OUTBOUND CONNECTION
222
222
18.7. CONFIGURING A LOCAL OUTBOUND CONNECTION
223
. . . . . . . . . .19.
CHAPTER
. . .CONFIGURING
. . . . . . . . . . . . . THE
. . . . IO
. . .SUBSYSTEM
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .225
............
19.1. IO SUBSYSTEM OVERVIEW
19.2. CONFIGURING A WORKER
225
225
19.3. CONFIGURING A BUFFER POOL
225
.CHAPTER
. . . . . . . . .20.
. . .CONFIGURING
. . . . . . . . . . . . . BATCH
. . . . . . .APPLICATIONS
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .227
............
20.1. CONFIGURING BATCH JOBS
227
20.2. MANAGING BATCH JOBS
230
. . . . . . . . . .21.
CHAPTER
. . .CONFIGURING
. . . . . . . . . . . . . HIGH
. . . . . AVAILABILITY
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .232
............
21.1. INTRODUCTION TO HIGH AVAILABILITY
21.2. CLUSTER COMMUNICATION WITH JGROUPS
232
233
21.3. INFINISPAN
241
21.4. CONFIGURING JBOSS EAP AS A FRONT-END LOAD BALANCER
21.5. USING AN EXTERNAL WEB SERVER AS A PROXY SERVER
253
255
21.6. THE MOD_CLUSTER HTTP CONNECTOR
21.7. APACHE MOD_JK HTTP CONNECTOR
259
270
21.8. APACHE MOD_PROXY HTTP CONNECTOR
273
21.9. MICROSOFT ISAPI CONNECTOR
276
21.10. ORACLE NSAPI CONNECTOR
282
.APPENDIX
. . . . . . . . . A.
. . .REFERENCE
. . . . . . . . . . . MATERIAL
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .289
............
A.1. SERVER RUNTIME ARGUMENTS
289
A.2. RPM SERVICE CONFIGURATION FILES
292
A.3. RPM SERVICE CONFIGURATION PROPERTIES
293
A.4. OVERVIEW OF JBOSS EAP SUBSYSTEMS
295
A.5. ADD-USER UTILITY ARGUMENTS
A.6. MANAGEMENT AUDIT LOGGING ATTRIBUTES
299
300
A.7. INTERFACE ATTRIBUTES
303
A.8. SOCKET BINDING ATTRIBUTES
305
A.9. DEFAULT SOCKET BINDINGS
305
A.10. DEPLOYMENT SCANNER MARKER FILES
A.11. DEPLOYMENT SCANNER ATTRIBUTES
307
308
A.12. ROOT LOGGER ATTRIBUTES
309
A.13. LOG CATEGORY ATTRIBUTES
310
A.14. LOG HANDLER ATTRIBUTES
311
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Red Hat JBoss Enterprise Application Platform 7.0 Configuration Guide
4
A.15. DATASOURCE CONNECTION URLS
319
A.16. DATASOURCE PARAMETERS
A.17. DATASOURCE STATISTICS
320
328
A.18. TRANSACTION MANAGER CONFIGURATION OPTIONS
333
A.19. RESOURCE ADAPTER ATTRIBUTES
336
A.20. RESOURCE ADAPTER STATISTICS
342
A.21. UNDERTOW SUBSYSTEM ATTRIBUTES
A.22. DEFAULT BEHAVIOR OF HTTP METHODS
343
375
A.23. IO SUBSYSTEM ATTRIBUTES
376
A.24. REMOTING SUBSYSTEM ATTRIBUTES
377
A.25. APACHE HTTP SERVER MOD_CLUSTER DIRECTIVES
385
A.26. MOD_CLUSTER SUBSYSTEM ATTRIBUTES
A.27. MOD_JK WORKER PROPERTIES
389
394
A.28. SECURITY MANAGER SUBSYSTEM ATTRIBUTES
396
Table of Contents
5
Red Hat JBoss Enterprise Application Platform 7.0 Configuration Guide
CHAPTER 1. OVERVIEW
The purpose of this guide is to cover many of the necessary configuration tasks needed for setting
up and maintaining JBoss EAP as well as running applications and other services on JBoss EAP on
it. Before using this guide to configure JBoss EAP, its assumed that the latest version of JBoss EAP
has been downloaded and installed. For more details on the obtaining and installing JBoss EAP,
please see the Getting Started Guide.
Important
Since the installation location of JBoss EAP will vary between host machines, this guide
refers to the installation location JBoss EAP simply as EAP_HOME. The actual location of
the JBoss EAP install should be used instead of EAP_HOME when performing
administrative tasks.
6
CHAPTER 2. STARTING AND STOPPING JBOSS EAP
CHAPTER 2. STARTING AND STOPPING JBOSS EAP
2.1. STARTING JBOSS EAP
JBoss EAP runs in one of two operating modes: as a standalone server or in a managed domain,
and is supported on several platforms: Red Hat Enterprise Linux, Windows Server, Oracle Solaris,
and Hewlett-Packard HP-UX.
The specific command to start JBoss EAP depends on the underlying platform and the desired
operating mode.
Start JBoss EAP as a Standalone Server
$ EAP_HOME/bin/standalone.sh
Note
For Windows Server, use the EAP_HOME\bin\standalone.bat script.
This startup script uses the EAP_HOME/bin/standalone.conf file (or standalone.conf.bat
for Windows Server) to set some default preferences, such as JVM options. You can customize the
settings in this file.
JBoss EAP uses the standalone.xml configuration file by default, but can be started using a
different one. For details on the available standalone configuration files and how to use them, see
the Standalone Server Configuration Files section.
For a complete listing of all available startup script arguments and their purposes, use the --help
argument or see the Server Runtime Arguments section.
Start JBoss EAP in a Managed Domain
The domain controller must be started before the servers in any of the server groups in the domain.
Use this script to first start the domain controller, and then for each associated host controller.
$ EAP_HOME/bin/domain.sh
Note
For Windows Server, use the EAP_HOME\bin\domain.bat script.
This startup script uses the EAP_HOME/bin/domain.conf file (or domain.conf.bat for
Windows Server) to set some default preferences, such as JVM options. You can customize the
settings in this file.
JBoss EAP uses the host.xml host configuration file by default, but can be started using a
different one. For details on the available managed domain configuration files and how to use them,
see the Managed Domain Configuration Files section.
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Red Hat JBoss Enterprise Application Platform 7.0 Configuration Guide
When setting up a managed domain, additional arguments will need to be passed into the startup
script. For a complete listing of all available startup script arguments and their purposes, use the -help argument or see the Server Runtime Arguments section.
2.2. STOPPING JBOSS EAP
The way that you stop JBoss EAP depends on how it was started.
Stop an Interactive Instance of JBoss EAP
Press Ctrl+C in the terminal where JBoss EAP was started.
Stop a Background Instance of JBoss EAP
Use the management CLI to connect to the running instance and shut down the server.
1. Launch the management CLI.
$ EAP_HOME/bin/jboss-cli.sh --connect
2. Issue the shutdown command.
shutdown
Note
When running in a managed domain, you must specify the host name to shut down by
using the --host argument with the shutdown command.
2.3. RUNNING JBOSS EAP IN ADMIN-ONLY MODE
JBoss EAP has the ability to be started in admin-only mode. This enables JBoss EAP to run and
accept management requests but not start other runtime services or accept end user requests.
Admin-only mode is available in both standalone servers as well as managed domains. In a
managed domain, if a domain controller is started in admin-only mode, it will not accept incoming
connections from slave host controllers.
To start a JBoss EAP instance in admin-only mode, use the --admin-only runtime switch when
starting the JBoss EAP instance.
Note
The management CLI commands shown assume that you are running a JBoss EAP
standalone server. For more details on using the management CLI for a JBoss EAP
managed domain, please see the JBoss EAP Management CLI Guide.
Start JBoss EAP in Admin-Only Mode
$ EAP_HOME/bin/standalone.sh --admin-only
8
CHAPTER 2. STARTING AND STOPPING JBOSS EAP
Check If JBoss EAP is Running in Admin-Only Mode
To determine if a JBoss EAP instance is running in admin-only mode:
Note
The management CLI commands shown assume that you are running a JBoss EAP
standalone server. For more details on using the management CLI for a JBoss EAP
managed domain, please see the JBoss EAP Management CLI Guide.
:read-attribute(name=running-mode)
If the JBoss EAP instance is running in admin-only mode, the result will be:
{
"outcome" => "success",
"result" => "ADMIN_ONLY"
}
otherwise, the result will be:
{
"outcome" => "success",
"result" => "NORMAL"
}
Restart in a Different Mode from the Management CLI
In addition to stopping and starting a JBoss EAP instance with a different runtime switch, the
management CLI may also be used to reload the server and start it in a different mode. To reload a
JBoss EAP instance to start in admin-only mode:
Note
The management CLI commands shown assume that you are running a JBoss EAP
standalone server. For more details on using the management CLI for a JBoss EAP
managed domain, please see the JBoss EAP Management CLI Guide.
reload --admin-only=true
To reload a JBoss EAP instance to start in normal mode:
reload --admin-only=false
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Red Hat JBoss Enterprise Application Platform 7.0 Configuration Guide
Note
Separate from the current running mode, the initial running mode may also be checked
with the following command: /core-service=server-environment:readattribute(name=initial-running-mode). This command differs from :readattribute(name=running-mode) by displaying the running mode in which JBoss
EAP was launched and NOT its current running mode.
2.4. SUSPEND AND SHUT DOWN JBOSS EAP GRACEFULLY
JBoss EAP can be suspended or shut down gracefully. This allows active requests to complete
normally, without accepting any new requests. A timeout value specifies how long that the suspend
or shut down operation will wait for active requests to complete. While the server is suspended,
management requests are still processed.
Graceful shutdown is coordinated at a server-wide level, mostly focused on the entry points at which
a request enters the server. The following subsystems support graceful shutdown:
Undertow
The Undertow subsystem will wait for all requests to finish.
mod_cluster
The mod_cluster subsystem will notify the load balancer that the server is suspending in the
PRE_SUSPEND phase.
EJB
The EJB subsystem will wait for all remote EJB requests and MDB message deliveries to
finish. Delivery to MDBs is stopped in the PRE_SUSPEND phase. EJB timers are suspended,
and missed timers will be activated when the server is resumed.
EE Concurrency
The server will wait for all active jobs to finish. All queued jobs will be skipped. Currently,
since EE Concurrency does not have persistence, those queued jobs that were skipped will
be lost.
Batch
The server will stop all running jobs within the timeout period and defer all scheduled jobs.
Note
Graceful shutdown currently will not reject inbound remote distributed transactions or new
inbound JMS messages. EE batch jobs and EE concurrency tasks scheduled by inflight
activity are currently allowed to proceed. However, EE concurrency tasks submitted that
pass the timeout window currently error when executed.
2.4.1. Suspend Servers
10
CHAPTER 2. STARTING AND STOPPING JBOSS EAP
JBoss EAP 7 introduced a suspend mode, which suspends server operations gracefully. This allows
all active requests to complete normally, but will not accept any new requests. Once the server has
been suspended, it can be shut down, returned back to a running state, or left in a suspended state
to perform maintenance.
Note
The management interfaces are not impacted by suspending the server.
The server can be suspended and resumed using the management console or the management
CLI.
Check the Server Suspend State
The server suspend state can be viewed using the following management CLI commands. The
resulting value will be one of RUNNING, PRE_SUSPEND, SUSPENDING, or SUSPENDED.
Check the suspend state for a standalone server.
:read-attribute(name=suspend-state)
Check the suspend state for a server in a managed domain.
/host=master/server=server-one:read-attribute(name=suspend-state)
Suspend
Use the following management CLI commands to suspend the server, specifying the timeout value,
in seconds, for the server to wait for active requests to complete. The default is 0, which will
suspend immediately. A value of -1 will cause the server to wait indefinitely for all active requests to
complete.
Each example waits up to 60 seconds for requests to complete before suspending.
Suspend a standalone server.
:suspend(timeout=60)
Suspend all servers in a managed domain.
:suspend-servers(timeout=60)
Suspend a single server in a managed domain.
/host=master/server-config=server-one:suspend(timeout=60)
Suspend all servers in a server group.
/server-group=main-server-group:suspend-servers(timeout=60)
Resume
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The server can be returned back to a normal running state to accept new requests by using the
resume command at the appropriate level (server, server group, entire domain). For example:
:resume
2.4.2. Shut Down Servers Gracefully
A server will be shut down gracefully if an appropriate timeout value is specified when stopping the
server. Once the command is issued, the server will be suspended and will wait up to the specified
timeout for all requests to finish before shutting down.
Use the following management CLI commands to shut down the server gracefully. Specify the
timeout value, in seconds, for the server to wait for active requests to complete. The default is 0,
which will shut down the server immediately. A value of -1 will cause the server to wait indefinitely
for all active requests to complete before shutting down.
Each example waits up to 60 seconds for requests to complete before shutting down.
Shut down a standalone server gracefully.
:shutdown(timeout=60)
Stop all servers in a managed domain gracefully.
:stop-servers(timeout=60)
Stop a single server in a managed domain gracefully.
/host=master/server-config=server-one:stop(timeout=60)
Stop all servers in a server group gracefully.
/server-group=main-server-group:stop-servers(timeout=60)
2.5. STARTING AND STOPPING JBOSS EAP (RPM INSTALLATION)
Starting and stopping JBoss EAP is different for an RPM installation compared to a ZIP or installer
installation.
2.5.1. Starting JBoss EAP (RPM Installation)
The command for starting an RPM installation of JBoss EAP depends on which operating mode you
want to start (a standalone server or a managed domain), and which Red Hat Enterprise Linux
version you are running.
Start JBoss EAP as a Standalone Server (RPM Installation)
For Red Hat Enterprise Linux 6:
$ service eap7-standalone start
For Red Hat Enterprise Linux 7:
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CHAPTER 2. STARTING AND STOPPING JBOSS EAP
$ systemctl start eap7-standalone.service
This will start JBoss EAP using the standalone.xml configuration file by default. You can start
JBoss EAP with a different standalone server configuration file by setting a property in the RPM
service configuration file. For more information, see the Configure RPM Service Properties section
below.
Start JBoss EAP in a Managed Domain (RPM Installation)
For Red Hat Enterprise Linux 6:
$ service eap7-domain start
For Red Hat Enterprise Linux 7:
$ systemctl start eap7-domain.service
This will start JBoss EAP using the host.xml configuration file by default. You can start JBoss EAP
with a different managed domain configuration file by setting a property in the RPM service
configuration file. For more information, see the Configure RPM Service Properties section below.
Configure RPM Service Properties
This section shows you how to configure the RPM service properties and other startup options for
your JBoss EAP installation. Note that it is recommended to back up your configuration files before
making modifications.
For a listing of all available startup options for an RPM installation, see the RPM Service
Configuration Properties section.
Specify the server configuration file.
When starting a standalone server, the standalone.xml file is used by default. When running
in a managed domain, the host.xml file is used by default. You can start JBoss EAP with a
different configuration file by setting the WILDFLY_SERVER_CONFIG property in the appropriate
RPM configuration file, for example, eap7-standalone.conf.
WILDFLY_SERVER_CONFIG=standalone-full.xml
Bind to a specific IP address.
By default, a JBoss EAP RPM installation binds to 0.0.0.0. You can bind JBoss EAP to a
specific IP address by setting the WILDFLY_BIND property in the appropriate RPM configuration
file, for example, eap7-standalone.conf.
WILDFLY_BIND=192.168.0.1
Note
If you want to bind the management interfaces to a specific IP address, this can be
configured in the JBoss EAP startup configuration file as shown in the next example.
Set JVM options or Java properties.
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Red Hat JBoss Enterprise Application Platform 7.0 Configuration Guide
You can specify JVM options or Java properties to pass into the JBoss EAP startup script by
editing the startup configuration file. This file is EAP_HOME/bin/standalone.conf for a
standalone server or EAP_HOME/bin/domain.conf for a managed domain. The below
example configures the heap size and binds the JBoss EAP management interfaces to an IP
address.
JAVA_OPTS="$JAVA_OPTS -Xms2048m -Xmx2048m"
JAVA_OPTS="$JAVA_OPTS -Djboss.bind.address.management=192.168.0.1"
Note
If required, the JBoss EAP bind address must be configured using the WILDFLY_BIND
property and not using the jboss.bind.address standard property here.
Note
If a property has the same name in both the RPM service configuration file (for example,
/etc/sysconfig/eap7-standalone) and in the JBoss EAP startup configuration file
(for example, EAP_HOME/bin/standalone.conf), the value that takes precedence is
the one in the JBoss EAP startup configuration file. One such property is JAVA_HOME.
2.5.2. Stopping JBoss EAP (RPM Installation)
The command for stopping an RPM installation of JBoss EAP depends on which operating mode
that was started (a standalone server or a managed domain), and which Red Hat Enterprise Linux
version you are running.
Stop JBoss EAP as a Standalone Server (RPM Installation)
For Red Hat Enterprise Linux 6:
$ service eap7-standalone stop
For Red Hat Enterprise Linux 7:
$ systemctl stop eap7-standalone.service
Stop JBoss EAP in a Managed Domain (RPM Installation)
For Red Hat Enterprise Linux 6:
$ service eap7-domain stop
For Red Hat Enterprise Linux 7:
$ systemctl stop eap7-domain.service
For a listing of all available startup options for an RPM installation, see the RPM Service
Configuration Files section.
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2.6. POWERSHELL SCRIPTS
The PowerShell scripts are available for technical preview only and not supported. PowerShell
scripts are designed to work correctly with version 2 and newer, because JBoss EAP is supported
on Windows Server 2008 R2 Enterprisex86_64 and Windows Server 2012 R2 Standard x86_64.
By default, Windows Server 2008 R2 Enterprisex86_64 uses PowerShell version 2. Newer
version could be installed.
By default, Windows Server 2012 R2 Standard x86_64 uses PowerShell version 4. Newer
version could be installed.
The path of the PowerShell scripts is 'EAP_HOME/bin' and you can use the scripts when you want
to use modern scripting language on Windows.
Note
The arguments of scripts should be in quotes. For example:
PS C:\Users\Administrator\7.0.0.ER2\jboss-eap-7.0\bin>
.\standalone.ps1 "-c=standalone-full.xml"
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CHAPTER 3. JBOSS EAP MANAGEMENT
JBoss EAP uses a simplified configuration, with one configuration file per standalone server or
managed domain. Default configuration for a standalone server is stored in the
EAP_HOME/standalone/configuration/standalone.xml file and default configuration for a
managed domain is stored in the EAP_HOME/domain/configuration/domain.xml file.
Additionally, the default configuration for a host controller is stored in the
EAP_HOME/domain/configuration/host.xml file.
JBoss EAP can be configured using the command-line management CLI or the web-based
management console. Changes made using these management interfaces persist automatically and
the XML configuration files are overwritten by the Management API. It is not recommended to edit
the XML configuration files manually.
3.1. ABOUT SUBSYSTEMS, EXTENSIONS, AND PROFILES
Different aspects of JBoss EAP functionality are configured in different subsystems. For example,
application and server logging are configured in the logging subsystem.
A subsystem provides configuration options for a particular extension. An extension is a module that
extends the core functionality of the server. Extensions are loaded as they are needed by
deployments, and are unloaded when they are no longer needed.
A collection of subsystem configurations makes up a profile, which is configured to satisfy the needs
of the server. A standalone server has a single, unnamed profile. A managed domain can define
many profiles for use by the servers in the domain.
For more information on the available subsystems, see Overview of JBoss EAP Subsystems.
Using the Management Console or the Management CLI
Both the management console and the management CLI are valid, supported ways of updating the
configuration of a JBoss EAP instance. Deciding between the two is a matter of preference. Those
who prefer to use a graphical, web-based interface should use the management console. Those
who prefer a command-line interface should use the management CLI.
3.2. MANAGEMENT USERS
You must create at least one administrative user in order to use the management console. HTTPbased communication with JBoss EAP is considered remote access, even if the traffic originates on
the localhost. If you attempt to access the management console before adding a user, you will
receive an error message.
Depending on how JBoss EAP is installed, there may be no user accounts initially available to
access the management interfaces. If JBoss EAP is installed using the graphical installer, then one
user account with the necessary privileges is created during the installation process. Otherwise, you
must create at least one administrative user in order to access the management interfaces.
This guide covers simple user management for JBoss EAP using the add-user script, which is a
utility for adding new users to the properties files for out-of-the-box authentication. For more
advanced authentication and authorization options, such as LDAP or Role-Based Access Control
(RBAC), see the Core Management Authentication section of the JBoss EAP Security Architecture
guide.
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3.2.1. Adding a Management User
1. Run the add-user utility script and follow the prompts.
$ EAP_HOME/bin/add-user.sh
Note
For Windows Server, use the EAP_HOME\bin\add-user.bat script.
2. Press ENTER to select the default option a to add a management user.
This user will be added to the ManagementRealm and will be authorized to perform
management operations using the management console or management CLI. The other
choice (b) adds a user to the ApplicationRealm, which is used for applications and provides
no particular permissions.
3. Enter the desired username and password. You will be prompted to confirm the password.
By default, JBoss EAP allows weak passwords but will issue a warning. See Setting AddUser Utility Password Restrictions for details on changing this default behavior.
4. Enter a comma-separated list of groups to which the user belongs. If you do not want the
user to belong to any groups, press ENTER to leave it blank.
5. Review the information and enter yes to confirm.
6. Determine whether this user represents a remote JBoss EAP server instance. For a basic
management user, enter no.
One type of user that may need to be added to the ManagementRealm is a user
representing another instance of JBoss EAP, which must be able to authenticate to join as a
member of a cluster. If this is the case, then answer yes to this prompt and you will be given
a hashed secret value representing the user’s password, which will need to be added to a
different configuration file.
Users can also be created non-interactively by passing parameters to the add-user script. This
approach is not recommended on shared systems, because the passwords will be visible in log and
history files. For more information, see Running the Add-User Utility Non-Interactively.
3.2.2. Running the Add-User Utility Non-Interactively
You can run the add-user script non-interactively by passing in arguments on the command line.
At a minimum, the username and password must be provided.
Warning
This approach is not recommended on shared systems, because the passwords will be
visible in log and history files.
Create a User Belonging to Multiple Groups
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The following command adds a management user (mgmtuser1) with the guest and mgmtgroup
groups.
$ EAP_HOME/bin/add-user.sh -u 'mgmtuser1' -p 'password1!' -g
'guest,mgmtgroup'
Specify an Alternative Properties File
By default, user and group information created using the add-user script are stored in properties
files located in the server configuration directory.
User information is stored in the following properties files:
EAP_HOME/standalone/configuration/mgmt-users.properties
EAP_HOME/domain/configuration/mgmt-users.properties
Group information is stored in the following properties files:
EAP_HOME/standalone/configuration/mgmt-groups.properties
EAP_HOME/domain/configuration/mgmt-groups.properties
These default directories and properties file names can be overridden. The following command adds
a new user, specifying a different name and location for the user properties files.
$ EAP_HOME/bin/add-user.sh -u 'mgmtuser2' -p 'password1!' -sc
'/path/to/standaloneconfig/' -dc '/path/to/domainconfig/' -up
'newname.properties'
The new user was added to the user properties files now located at
/path/to/standaloneconfig/newname.properties and
/path/to/domainconfig/newname.properties. Note that these files must already exist or
you will see an error.
For a complete listing of all available add-user arguments and their purposes, use the --help
argument or see the Add-User Utility Arguments section.
3.2.3. Setting Add-User Utility Password Restrictions
The password restrictions for the add-user utility script can be configured using the
EAP_HOME/bin/add-user.properties file.
By default, JBoss EAP allows weak passwords but will issue a warning. To reject passwords that do
not meet the minimum requirements specified, set the password.restriction property to
REJECT.
Additional password requirements that can be configured in the EAP_HOME/bin/adduser.properties file:
Minimum length
Minimum alphabetic characters
Minimum digits
Minimum symbols
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List of forbidden passwords (such as admin)
Whether to allow a password that matches the username
3.3. MANAGEMENT INTERFACES
3.3.1. Management CLI
The management command-line interface (CLI) is a command-line administration tool for JBoss
EAP.
Use the management CLI to start and stop servers, deploy and undeploy applications, configure
system settings, and perform other administrative tasks. Operations can be performed in batch
mode, allowing multiple tasks to be run as a group.
Many common terminal commands are available, such as ls, cd, and pwd. The management CLI
also supports tab completion.
For detailed information on using the management CLI, including commands and operations, syntax,
and running in batch mode, see the JBoss EAP Management CLI Guide.
Launch the Management CLI
$ EAP_HOME/bin/jboss-cli.sh
Note
For Windows Server, use the EAP_HOME\bin\jboss-cli.bat script.
Connect to a Running Server
connect
Or you can launch the management CLI and connect in one step by using the
EAP_HOME/bin/jboss-cli.sh --connect command.
Display Help
Use the following command for general help.
help
Use the following command for help on a specific command.
deploy --help
Quit the Management CLI
quit
View System Settings
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The following command uses the read-attribute operation to display whether the example
datasource is enabled.
/subsystem=datasources/data-source=ExampleDS:readattribute(name=enabled)
{
"outcome" => "success",
"result" => true
}
When running in a managed domain, you must specify which profile to update by preceding the
command with /profile=PROFILE_NAME.
/profile=default/subsystem=datasources/data-source=ExampleDS:readattribute(name=enabled)
Update System Settings
The following command uses the write-attribute operation to disable the example datasource.
/subsystem=datasources/data-source=ExampleDS:writeattribute(name=enabled,value=false)
Start Servers
The management CLI can also be used to start and stop servers when running in a managed
domain.
/host=HOST_NAME/server-config=server-one:start
3.3.2. Management Console
The management console is a web-based administration tool for JBoss EAP.
Use the management console to start and stop servers, deploy and undeploy applications, tune
system settings, and make persistent modifications to the server configuration. The management
console also has the ability to perform administrative tasks, with live notifications when any changes
performed by the current user require the server instance to be restarted or reloaded.
In a managed domain, server instances and server groups in the same domain can be centrally
managed from the management console of the domain controller.
For a JBoss EAP instance running on the local host using the default management port, the
management console can be accessed through a web browser at
http://localhost:9990/console/App.html. You will need to authenticate with a user that has
permissions to access the management console.
The management console provides the following tabs for navigating and managing your JBoss EAP
standalone server or managed domain.
Home
Learn how to accomplish several common configuration and management tasks. Take a
tour to become familiar with the JBoss EAP management console.
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CHAPTER 3. JBOSS EAP MANAGEMENT
Deployments
Add, remove, and enable deployments. In a managed domain, assign deployments to
server groups.
Configuration
Configure available subsystems, which provide capabilities such as web services,
messaging, or high availability. In a managed domain, manage the profiles that contain
different subsystem configurations.
Runtime
View runtime information, such as server status, JVM usage, and server logs. In a managed
domain, manage your hosts, server groups, and servers.
Access Control
Assign roles to users and groups when using Role-Based Access Control.
Patching
Apply patches to your JBoss EAP instances.
Note
To take a tour of the updated management console, click the Take a Tour link on the
management console home page.
To view details about the form fields, click the Need Help? link.
To view the message history of configuration actions you have performed, click the
Messages link in the top-right of the management console.
3.3.2.1. Enable/Disable Management Console
You can enable or disable the management console by setting the console-enabled boolean
attribute of /core-service=management/management-interface=http-interface
resource. For master host in domain mode, /host=master/coreservice=management/management-interface=http-interface.
For example, to enable:
/core-service=management/management-interface=http-interface:writeattribute(name=console-enabled,value=true)
For example, to disable:
/core-service=management/management-interface=http-interface:writeattribute(name=console-enabled,value=false)
3.3.2.2. Change the Language of the Management Console
By default, the language settings of the management console is English. You can choose to use one
of the following languages instead:
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German (de)
Simplified Chinese (zh-Hans)
Brazilian Portuguese (pt-BR)
French (fr)
Spanish (es)
Japanese (ja)
To Change the Language of the Management Console
1. Log in to the management console.
2. Click the Settings link in the lower-right corner of the management console.
3. Select the required language from the Locale selection box.
4. Select Save. A confirmation box informs you that you need to reload the application.
5. Click Confirm. The system refreshes your web browser automatically to use the selected
locale.
3.4. CONFIGURATION DATA
3.4.1. Standalone Server Configuration Files
The standalone configuration files are located in the EAP_HOME/standalone/configuration
directory. A separate file exists for each of the four pre-defined profiles (default, ha, full, full-ha).
Table 3.1. Standalone Configuration Files
22
Configuration File
Purpose
standalone.xml
This standalone configuration file is the default configuration that is used when
you start your standalone server. It contains all information about the server,
including subsystems, networking, deployments, socket bindings, and other
configurable details. It does not provide the subsystems necessary for
messaging or high availability.
standaloneha.xml
This standalone configuration file includes all of the default subsystems and
adds the mod_cluster and JGroups subsystems for high availability. It does
not provide the subsystems necessary for messaging.
standalonefull.xml
This standalone configuration file includes all of the default subsystems and
adds the Messaging and IIOP subsystems. It does not provide the subsystems
necessary for high availability.
CHAPTER 3. JBOSS EAP MANAGEMENT
Configuration File
Purpose
standalonefull-ha.xml
This standalone configuration file includes support for every possible
subsystem, including those for messaging and high availability.
By default, starting JBoss EAP as a standalone server uses the standalone.xml file. To start
JBoss EAP with a different configuration, use the --server-config argument. For example,
$ EAP_HOME/bin/standalone.sh --server-config=standalone-full.xml
3.4.2. Managed Domain Configuration Files
The managed domain configuration files are located in the EAP_HOME/domain/configuration
directory.
Table 3.2. Managed Domain Configuration Files
Configuration File
Purpose
domain.xml
This is the main configuration file for a managed domain. Only the domain
master reads this file. This file contains the configurations for all of the profiles
(i.e. default, ha, full, full-ha).
host.xml
This file includes configuration details specific to a physical host in a managed
domain, such as network interfaces, socket bindings, the name of the host,
and other host-specific details. The host.xml file includes all of the features
of both host-master.xml and host-slave.xml, which are described
below.
host-master.xml
This file includes only the configuration details necessary to run a server as a
managed domain master server (domain controller).
host-slave.xml
This file includes only the configuration details necessary to run a server as a
managed domain slave server (host controller).
By default, starting JBoss EAP in a managed domain uses the host.xml file. To start JBoss EAP
with a different configuration, use the --host-config argument. For example,
$ EAP_HOME/bin/domain.sh --host-config=host-master.xml
3.4.3. Backing Up Configuration Data
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Red Hat JBoss Enterprise Application Platform 7.0 Configuration Guide
In order to later restore the JBoss EAP server configuration, items in the following locations should
be backed up:
EAP_HOME/standalone/configuration/
Back up the entire directory to save user data, server configuration, and logging settings for
standalone servers.
EAP_HOME/domain/configuration/
Back up the entire directory to save user and profile data, domain and host configuration, and
logging settings for managed domains.
EAP_HOME/modules/system/layers/base/
Back up any custom modules.
EAP_HOME/welcome-content/
Back up any custom welcome content.
EAP_HOME/bin/
Back up any custom scripts or startup configuration files.
3.4.4. Configuration File Snapshots
To assist in the maintenance and management of the server, JBoss EAP creates a timestamped
version of the original configuration file at the time of startup. Any additional configuration changes
made by management operations will result in the original file being automatically backed up, and a
working copy of the instance being preserved for reference and rollback. Additionally, configuration
snapshots can be taken, which are point-in-time copies of the current server configuration. These
snapshots can be saved and loaded by an administrator.
The following examples use the standalone.xml file, but the same process applies to the
domain.xml and host.xml files.
Take a Snapshot
Use the management CLI to take a snapshot of the current configurations.
:take-snapshot
{
"outcome" => "success",
"result" =>
"EAP_HOME/standalone/configuration/standalone_xml_history/snapshot/2015
1022-133109702standalone.xml"
}
List Snapshots
Use the management CLI to list all snapshots that have been taken.
:list-snapshots
{
"outcome" => "success",
"result" => {
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"directory" =>
"EAP_HOME/standalone/configuration/standalone_xml_history/snapshot",
"names" => [
"20151022-133109702standalone.xml",
"20151022-132715958standalone.xml"
]
}
}
Delete a Snapshot
Use the management CLI to delete a snapshot.
:delete-snapshot(name=20151022-133109702standalone.xml)
Start the Server with a Snapshot
The server can be started using a snapshot or an automatically-saved version of the configuration.
1. Navigate to the EAP_HOME/standalone/configuration/standalone_xml_history
directory and identify the snapshot or saved configuration file to be loaded.
2. Start the server and point to the selected configuration file. Pass in the file path relative to
the configuration directory (i.e. EAP_HOME/standalone/configuration).
$ EAP_HOME/bin/standalone.sh --serverconfig=standalone_xml_history/snapshot/20151022133109702standalone.xml
Note
When running in a managed domain, use the --host-config argument instead to
specify the configuration file.
3.4.5. View Configuration Changes
JBoss EAP 7 provides the ability to track configuration changes made to the running system. This
allows administrators to view a history of configuration changes made by other authorized users.
Important
Changes are stored in memory and are not persisted between server restarts. This
feature is not a replacement for management audit logging.
To enable to tracking of configuration changes, use the following management CLI command. You
can specify how many entries to store using the max-history attribute.
/core-service=management/service=configuration-changes:add(maxhistory=10)
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Red Hat JBoss Enterprise Application Platform 7.0 Configuration Guide
To view the list of most recent configuration changes, use the following management CLI command.
/core-service=management/service=configuration-changes:list-changes
This will list each configuration change made, with the date, origin, outcome, and operation details.
For example, the below output from the list-changes command shows configuration changes,
with the most recent displayed first.
{
"outcome" => "success",
"result" => [
{
"operation-date" => "2016-02-12T18:37:00.354Z",
"access-mechanism" => "NATIVE",
"remote-address" => "127.0.0.1/127.0.0.1",
"outcome" => "success",
"operations" => [{
"address" => [],
"operation" => "reload",
"operation-headers" => {
"caller-type" => "user",
"access-mechanism" => "NATIVE"
}
}]
},
{
"operation-date" => "2016-02-12T18:34:16.859Z",
"access-mechanism" => "NATIVE",
"remote-address" => "127.0.0.1/127.0.0.1",
"outcome" => "success",
"operations" => [{
"address" => [
("subsystem" => "datasources"),
("data-source" => "ExampleDS")
],
"operation" => "write-attribute",
"name" => "enabled",
"value" => false,
"operation-headers" => {
"caller-type" => "user",
"access-mechanism" => "NATIVE"
}
}]
},
{
"operation-date" => "2016-02-12T18:24:11.670Z",
"access-mechanism" => "HTTP",
"remote-address" => "127.0.0.1/127.0.0.1",
"outcome" => "success",
"operations" => [{
"operation" => "remove",
"address" => [
("subsystem" => "messaging-activemq"),
("server" => "default"),
("jms-queue" => "ExpiryQueue")
],
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"operation-headers" => {"access-mechanism" => "HTTP"}
}]
}
]
}
This example lists the details of three operations performed that impacted the configuration:
Reloading the server from the management CLI.
Disabling the ExampleDS datasource from the management CLI.
Removing the ExpiryQueue queue from the management console.
3.4.6. Property Replacement
JBoss EAP allows you to use expressions to define replaceable properties in place of literal values
in the configuration. Expressions use the format ${PARAMETER:DEFAULT_VALUE}. If the specified
parameter is set, then the parameter’s value will be used. Otherwise, the default value provided will
be used.
The supported sources for resolving expressions are system properties, environment variables, and
the vault. For deployments only, the source can be properties listed in a METAINF/jboss.properties file in the deployment archive. For deployment types that support
subdeployments, the resolution is scoped to all subdeployments if the properties file is in the outer
deployment (i.e. the EAR). If the properties file is in the subdeployment, then the resolution is
scoped just to that subdeployment.
The example below from the standalone.xml configuration file sets the inet-address for the
public interface to 127.0.0.1 unless the jboss.bind.address parameter is set.
The jboss.bind.address parameter can be set when starting EAP as a standalone server with
the following command:
$ EAP_HOME/bin/standalone.sh -Djboss.bind.address=IP_ADDRESS
Nested Expressions
Expressions can be nested, which allows for more advanced use of expressions in place of fixed
values. The format of a nested expression is like that of a normal expression, but one expression is
embedded in the other, for example:
${SYSTEM_VALUE_1${SYSTEM_VALUE_2}}
Nested expressions are evaluated recursively, so the inner expression is first evaluated, then the
outer expression is evaluated. Expressions may also be recursive, where an expression resolves to
another expression, which is then resolved. Nested expressions are permitted anywhere that
expressions are permitted, with the exception of management CLI commands.
An example of where a nested expression might be used is if the password used in a datasource
definition is masked. The configuration for the datasource might have the following line:
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${VAULT::ds_ExampleDS::password::1}
The value of ds_ExampleDS could be replaced with a system property (datasource_name) using
a nested expression. The configuration for the datasource could instead have the following line:
${VAULT::${datasource_name}::password::1}
JBoss EAP would first evaluate the expression ${datasource_name}, then input this to the larger
expression and evaluate the resulting expression. The advantage of this configuration is that the
name of the datasource is abstracted from the fixed configuration.
Descriptor-Based Property Replacement
Application configuration (e.g. datasource connection parameters) typically varies between
development, testing, and production environments. This variance is sometimes accommodated by
build system scripts, as the Java EE specification does not contain a method to externalize these
configurations. With JBoss EAP, you can use descriptor-based property replacement to manage
configuration externally.
Descriptor-based property replacement substitutes properties based on descriptors, allowing you to
remove assumptions about the environment from the application and the build chain. Environmentspecific configurations can be specified in deployment descriptors rather than annotations or build
system scripts. You can provide configuration in files or as parameters at the command line.
There are several flags in the EE subsystem that control whether property replacement is applied.
JBoss-specific descriptor replacement is controlled by the jboss-descriptor-propertyreplacement flag and is enabled by default. When enabled, properties can be replaced in the
following deployment descriptors:
jboss-ejb3.xml
jboss-app.xml
jboss-web.xml
*-jms.xml
*-ds.xml
The following management CLI command can be used to enable or disable property replacement in
JBoss-specific descriptors:
/subsystem=ee:write-attribute(name="jboss-descriptor-propertyreplacement",value=VALUE)
Java EE descriptor replacement controlled by the spec-descriptor-property-replacement
flag and is disabled by default. When enabled, properties can be replaced in the following
deployment descriptors:
ejb-jar.xml
persistence.xml
application.xml
web.xml
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The following management CLI command can be used to enable or disable property replacement in
Java EE descriptors:
/subsystem=ee:write-attribute(name="spec-descriptor-propertyreplacement",value=VALUE)
3.5. FILE SYSTEM PATHS
JBoss EAP uses logical names for file system paths. Other areas of the configuration can then
reference the paths using their logical name, avoiding the need to use absolute paths for each
instance and allowing specific host configurations to resolve to universal logical names.
For example, the default logging subsystem configuration declares jboss.server.log.dir as
the logical name for the server log directory.
Example: Relative Path Example for the Server Log Directory
...
...
3.5.3. Directory Grouping
In a managed domain, each server’s files are stored in the EAP_HOME/domain directory. You can
specify how to organize the subdirectories for servers using the host controller’s directorygrouping attribute. Directories can be grouped either by server or by type. By default, directories
are grouped by server.
Directory Grouping by Server
By default, directories are grouped by server. If your administration is server-centric, this
configuration is recommended. For example, it allows backups and log file handling to be configured
per server instance.
If JBoss EAP is installed using the ZIP installation method, the default directory structure (grouped
by server) will be as follows.
EAP_HOME/domain
└─ servers
├── server-one
│
├── data
│
├── tmp
│
└── log
└── server-two
├── data
├── tmp
└── log
To group domain directories by server, enter the following management CLI command:
/host=HOST_NAME:write-attribute(name=directory-grouping,value=byserver)
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This will update the host controller’s host.xml configuration file:
Directory Grouping by Type
Instead of grouping directories by server, you can instead group by file type. If your administration is
file type-centric, this configuration is recommended. For example, this would allow you to easily
back up only data files.
If JBoss EAP is installed using the ZIP installation method and the domain’s files are grouped by
type, the directory structure will be as follows.
EAP_HOME/domain
├── data
│
└── servers
│
├── server-one
│
└── server-two
├── log
│
└── servers
│
├── server-one
│
└── server-two
└── tmp
└── servers
├── server-one
└── server-two
To group domain directories by type, enter the following management CLI command:
/host=HOST_NAME:write-attribute(name=directory-grouping,value=by-type)
This will update the host controller’s host.xml configuration file:
3.6. SYSTEM PROPERTIES
You can use Java system properties to configure many JBoss EAP options, as well as set any
name-value pair for use within the application server.
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System properties can be used to override default values in the JBoss EAP configuration. For
example, the following XML configuration for the public interface bind address shows that it can be
set by the jboss.bind.address system property, but if the system property is not provided, it will
default to 127.0.0.1.
This configuration can be read using the following management CLI command.
/core-service=management/access=audit:read-resource(recursive=true)
See Enable Audit Logging to enable audit logging for a standalone server.
Managed Domain Audit Logging
Though disabled by default, the default audit logging configuration writes a file for each host and for
each server.
This configuration can be read using the following management CLI command.
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/host=HOST_NAME/core-service=management/access=audit:readresource(recursive=true)
See Enable Audit Logging to enable audit logging for a managed domain.
3.7.1. Enable Management Audit Logging
JBoss EAP is preconfigured with file handlers for audit logging, though audit logging is disabled by
default. The management CLI command to enable audit logging depends on whether you are
running as a standalone server or in a managed domain. See Management Audit Logging Attributes
for file handler attributes.
To set up syslog audit logging, see Set Up Management Audit Logging to a Syslog Server.
Enable Standalone Server Audit Logging
Audit logging can be enabled using the following command.
/core-service=management/access=audit/logger=audit-log:writeattribute(name=enabled,value=true)
By default, this will write the audit log to EAP_HOME/standalone/data/audit-log.log.
Enable Managed Domain Audit Logging
The default audit logging configuration for a managed domain is preconfigured to write an audit log
for each host and each server.
Audit logging for each host can be enabled using the following command.
/host=HOST_NAME/core-service=management/access=audit/logger=auditlog:write-attribute(name=enabled,value=true)
By default, this will write the audit logs to EAP_HOME/domain/data/audit-log.log.
Audit logging for each server can be enabled using the following command.
/host=HOST_NAME/core-service=management/access=audit/serverlogger=audit-log:write-attribute(name=enabled,value=true)
By default, this will write the audit logs to
EAP_HOME/domain/servers/SERVER_NAME/data/audit-log.log
3.7.2. Send Management Audit Logging to a Syslog Server
A syslog handler specifies the parameters by which audit log entries are sent to a syslog server,
specifically the syslog server’s host name and the port on which the syslog server is listening.
Sending audit logging to a syslog server provides more security options than logging to a local file or
local syslog server. Multiple syslog handlers can be defined and be active at the same time.
By default, audit logging is preconfigured to output to a file when enabled. Use the following steps to
set up and enable audit logging to a syslog server. See Management Audit Logging Attributes for
syslog handler attributes.
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1. Add a syslog handler.
Create the syslog handler, specifying the host and port of the syslog server. In a managed
domain, you must precede the /core-service commands with /host=HOST_NAME.
batch
/core-service=management/access=audit/sysloghandler=SYSLOG_HANDLER_NAME:add(formatter=json-formatter)
/core-service=management/access=audit/sysloghandler=SYSLOG_HANDLER_NAME/protocol=udp:add(host=HOST_NAME,port=
PORT)
run-batch
Note
The parameters to pass in differ depending on the protocol specified.
To configure the handler to use TLS to communicate securely with the syslog
server, you must also configure the authentication, for example:
/core-service=management/access=audit/sysloghandler=SYSLOG_HANDLER_NAME/protocol=tls/authentication=tr
uststore:add(keystore-path=PATH_TO_TRUSTSTORE,keystorepassword=TRUSTSTORE_PASSWORD)
2. Add a reference to the syslog handler.
In a managed domain, you must precede this command with /host=HOST_NAME.
/core-service=management/access=audit/logger=auditlog/handler=SYSLOG_HANDLER_NAME:add
3. Enable audit logging.
See Enable Management Audit Logging to enable audit logging.
Important
Enabling audit logging to a syslog server in JBoss EAP will not work unless logging is
enabled in the operating system as well.
For more information on rsyslog configurations on Red Hat Enterprise Linux, see the
Basic Configuration of Rsyslog section of the System Administrator’s Guide for Red Hat
Enterprise Linux at https://access.redhat.com/documentation/en/red-hat-enterprise-linux/
3.7.3. Read Audit Log Entries
Audit log entries output to files are best viewed with a text viewer, while those output to a syslog
server are best viewed using a syslog viewer application.
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Note
Using a text editor for viewing log files is not recommended as some may prevent further
log entries being written to the log file.
The audit log entries are stored in JSON format. Each log entry begins with an optional timestamp,
followed by the fields in the below table.
Table 3.4. Management Audit Log Fields
Field Name
Description
access
This can have one of the following values:
NATIVE - The operation came in through the native management
interface.
HTTP - The operation came in through the domain HTTP interface.
JMX - The operation came in through the JMX subsystem.
booting
Has the value true if the operation was executed during the bootup process,
or false if it was executed once the server is up and running.
domainUUID
An ID to link together all operations as they are propagated from the domain
controller to its servers, slave host controllers, and slave host controller
servers.
ops
The operations being executed. This is a list of the operations serialized to
JSON. At boot, this is the operations resulting from parsing the XML. Once
booted, the list typically contains a single entry.
r/o
Has the value true if the operation does not change the management model,
or false if it does not.
remote-address
The address of the client executing this operation.
success
Has the value true if the operation was successful, or false if it was rolled
back.
type
This can have the value core, meaning it is a management operation, or
jmx, meaning it comes from the JMX subsystem.
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Field Name
Description
user
The username of the authenticated user. If the operation occurred using the
management CLI on the same machine as the running server, the special user
$local is used.
version
The version number of the JBoss EAP instance.
CHAPTER 4. NETWORK AND PORT CONFIGURATION
CHAPTER 4. NETWORK AND PORT CONFIGURATION
4.1. INTERFACES
JBoss EAP references named interfaces throughout the configuration. This allows the configuration
to reference individual interface declarations with logical names, rather than requiring the full details
of the interface at each use.
This also allows for easier configuration in a managed domain, where network interface details can
vary across multiple machines. Each server instance can correspond to a logical name group.
The standalone.xml, domain.xml, and host.xml files all include interface declarations. There
are several preconfigured interface names, depending on which default configuration is used. The
management interface can be used for all components and services that require the management
layer, including the HTTP management endpoint. The public interface can be used for all
application-related network communications. The unsecure interface is used for IIOP sockets in
the standard configuration. The private interface is used for JGroups sockets in the standard
configuration.
4.1.1. Default Interface Configurations
By default, JBoss EAP binds these interfaces to 127.0.0.1, but these values can be overridden at
runtime by setting the appropriate property. For example, the inet-address of the public
interface can be set when starting JBoss EAP as a standalone server with the following command.
$ EAP_HOME/bin/standalone.sh -Djboss.bind.address=IP_ADDRESS
Alternatively, you can use the -b switch on the server start command line. For more information
about server start options, see Server Runtime Arguments.
Important
If you modify the default network interfaces or ports that JBoss EAP uses, you must also
remember to change any scripts that use the modified interfaces or ports. These include
JBoss EAP service scripts, as well as remembering to specify the correct interface and
port when accessing the management console or management CLI.
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4.1.2. Configuring Interfaces
Network interfaces are declared by specifying a logical name and selection criteria for the physical
interface. The selection criteria can reference a wildcard address or specify a set of one or more
characteristics that an interface or address must have in order to be a valid match. For a listing of all
available interface selection criteria, see the Interface Attributes section.
Interfaces can be configured using the management console or the management CLI. Below are
several examples of adding and updating interfaces. The management CLI command is shown first,
followed by the corresponding configuration XML.
Add an Interface with a NIC Value
Add a new interface with a NIC value of eth0.
/interface=external:add(nic=eth0)
Add an Interface with Several Conditional Values
Add a new interface that matches any interface/address on the correct subnet if it is up, supports
multicast, and is not point-to-point.
/interface=default:add(subnetmatch=192.168.0.0/16,up=true,multicast=true,not={point-to-point=true})
Update an Interface Attribute
Update the public interface’s default inet-address value, keeping the jboss.bind.address
property to allow for this value to be set at runtime.
/interface=public:write-attribute(name=inetaddress,value="${jboss.bind.address:192.168.0.0}")
Add an Interface to a Server in a Managed Domain
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CHAPTER 4. NETWORK AND PORT CONFIGURATION
/host=master/serverconfig=SERVER_NAME/interface=INTERFACE_NAME:add(inet-address=127.0.0.1)
4.2. SOCKET BINDINGS
Socket bindings and socket binding groups allow you to define network ports and their relationship
to the networking interfaces required for your JBoss EAP configuration. A socket binding is a named
configuration for a socket. A socket binding group is a collection of socket binding declarations that
are grouped under a logical name.
This allows other sections of the configuration to reference socket bindings by their logical name,
rather than requiring the full details of the socket configuration at each use.
The declarations for these named configurations can be found in the standalone.xml and
domain.xml configuration files. A standalone server contains only one socket binding group, while
a managed domain can contain multiple groups. You can create a socket binding group for each
server group in the managed domain, or share a socket binding group between multiple server
groups.
The ports used by JBoss EAP by default depend on which socket binding groups are used and the
requirements of your individual deployments.
4.2.1. Management Ports
Management ports were consolidated in JBoss EAP 7. By default, JBoss EAP 7 uses port 9990 for
both native management (management CLI) and HTTP management (web-based management
console). Port 9999, which was used as the native management port in JBoss EAP 6, is no longer
used but can still be enabled if desired.
If HTTPS is enabled for the management console, then port 9993 is used by default.
4.2.2. Default Socket Bindings
JBoss EAP ships with a socket binding group for each of the four pre-defined profiles (default, ha,
full, full-ha).
For detailed information about the default socket bindings, such as default ports and descriptions,
see the Default Socket Bindings section.
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Important
If you modify the default network interfaces or ports that JBoss EAP uses, you must also
remember to change any scripts that use the modified interfaces or ports. These include
JBoss EAP service scripts, as well as remembering to specify the correct interface and
port when accessing the management console or management CLI.
Standalone Server
When running as a standalone server, only one socket binding group is defined per configuration
file. Each standalone configuration file (standalone.xml, standalone-ha.xml, standalonefull.xml, standalone-full-ha.xml) defines socket bindings for the technologies used by its
corresponding profile.
For example, the default standalone configuration file (standalone.xml) specifies the below
socket bindings.
Managed Domain
When running in a managed domain, all socket binding groups are defined in the domain.xml file.
There are four pre-defined socket binding groups:
standard-sockets
ha-sockets
full-sockets
full-ha-sockets
Each socket binding group specifies socket bindings for the technologies used by its corresponding
profile. For example, the full-ha-sockets socket binding group defines several jgroups socket
bindings, which are used by the full-ha profile for high availability.
...
...
Note
The socket configuration for the management interfaces is defined in the domain
controller’s host.xml file.
4.2.3. Configuring Socket Bindings
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When defining a socket binding, you can configure the port and interface attributes, as well as
multicast settings such as multicast-address and multicast-port. For details on all
available socket bindings attributes, see the Socket Binding Attributes section.
Socket bindings can be configured using the management console or the management CLI. The
following steps go through adding a socket binding group, adding a socket binding, and configuring
socket binding settings using the management CLI.
1. Add a new socket binding group. Note that this step cannot be performed when running as a
standalone server.
/socket-binding-group=new-sockets:add(default-interface=public)
2. Add a socket binding.
/socket-binding-group=new-sockets/socket-binding=new-socketbinding:add(port=1234)
3. Change the socket binding to use an interface other than the default, which is set by the
socket binding group.
/socket-binding-group=new-sockets/socket-binding=new-socketbinding:write-attribute(name=interface,value=unsecure)
The following example shows how the XML configuration may look after the above steps have been
completed.
...
4.2.4. Port Offsets
A port offset is a numeric offset value added to all port values specified in the socket binding group
for that server. This allows the server to inherit the port values defined in its socket binding group,
with an offset to ensure that it does not conflict with any other servers on the same host. For
instance, if the HTTP port of the socket binding group is 8080, and a server uses a port offset of
100, then its HTTP port is 8180.
Below is an example of setting a port offset of 250 for a server in a managed domain using the
management CLI.
/host=master/server-config=server-two/:write-attribute(name=socketbinding-port-offset,value=250)
Port offsets can be used for servers in a managed domain and for running multiple standalone
servers on the same host.
You can pass in a port offset when starting a standalone server using the
jboss.socket.binding.port-offset property.
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$ EAP_HOME/bin/standalone.sh -Djboss.socket.binding.port-offset=100
4.3. IPV6 ADDRESSES
By default, JBoss EAP is configured to run using IPv4 addresses. The steps below show how to
configure JBoss EAP to run using IPv6 addresses.
Configure the JVM Stack for IPv6 Addresses
Update the startup configuration to prefer IPv6 addresses.
1. Open the startup configuration file.
When running as a standalone server, edit the EAP_HOME/bin/standalone.conf
file (or standalone.conf.bat for Windows Server).
When running in a managed domain, edit the EAP_HOME/bin/domain.conf file (or
domain.conf.bat for Windows Server).
2. Set the java.net.preferIPv4Stack property to false.
-Djava.net.preferIPv4Stack=false
3. Append the java.net.preferIPv6Addresses property and set it to true.
-Djava.net.preferIPv6Addresses=true
The following example shows how the JVM options in the startup configuration file may look after
making the above changes.
# Specify options to pass to the Java VM.
#
if [ "x$JAVA_OPTS" = "x" ]; then
JAVA_OPTS="-Xms1303m -Xmx1303m -Djava.net.preferIPv4Stack=false"
JAVA_OPTS="$JAVA_OPTS Djboss.modules.system.pkgs=$JBOSS_MODULES_SYSTEM_PKGS Djava.awt.headless=true"
JAVA_OPTS="$JAVA_OPTS -Djava.net.preferIPv6Addresses=true"
else
Update Interface Declarations for IPv6 Addresses
The default interface values in the configuration can be changed to IPv6 addresses. For example,
the below management CLI command sets the management interface to the IPv6 loopback address
(::1).
/interface=management:write-attribute(name=inetaddress,value="${jboss.bind.address.management:[::1]}")
The following example shows how the XML configuration may look after running the above
command.
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....
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CHAPTER 5. JBOSS EAP SECURITY
CHAPTER 5. JBOSS EAP SECURITY
JBoss EAP offers the ability to configure security for its own interfaces and services as well as
provide security for applications that are running on it. For more details on securing JBoss EAP
itself, please see the How to Configure Server Security Guide. For more details on providing
security for applications deployed to JBoss EAP, please see the How to Configure Identity
Management Guide. For an overview of general security concepts as well as security concepts
specific to JBoss EAP, please see the JBoss EAP Security Architecture Guide.
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CHAPTER 6. JBOSS EAP CLASS LOADING
JBoss EAP uses a modular class loading system for controlling the class paths of deployed
applications. This system provides more flexibility and control than the traditional system of
hierarchical class loaders. Developers have fine-grained control of the classes available to their
applications, and can configure a deployment to ignore classes provided by the application server in
favor of their own.
The modular class loader separates all Java classes into logical groups called modules. Each
module can define dependencies on other modules in order to have the classes from that module
added to its own class path. Because each deployed JAR and WAR file is treated as a module,
developers can control the contents of their application’s class path by adding module configuration
to their application.
6.1. MODULES
A module is a logical grouping of classes used for class loading and dependency management.
JBoss EAP identifies two different types of modules: static and dynamic. The main difference
between the two is how they are packaged.
Static Modules
Static modules are defined in the EAP_HOME/modules/ directory of the application server. Each
module exists as a subdirectory, for example EAP_HOME/modules/com/mysql/. Each module
directory then contains a slot subdirectory, which defaults to main and contains the module.xml
configuration file and any required JAR files. All the application server-provided APIs are provided
as static modules, including the Java EE APIs as well as other APIs.
Example MySQL JDBC Driver module.xml File
The module name (com.mysql) must match the directory structure for the module, excluding the
slot name (main).
Creating custom static modules can be useful if many applications are deployed on the same server
that use the same third-party libraries. Instead of bundling those libraries with each application, a
module containing these libraries can be created and installed by an administrator. The applications
can then declare an explicit dependency on the custom static modules.
The modules provided in JBoss EAP distributions are located in the system directory within the
EAP_HOME/modules directory. This keeps them separate from any modules provided by third
parties. Any Red Hat provided products that layer on top of JBoss EAP also install their modules
within the system directory.
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Users must ensure that custom modules are installed into the EAP_HOME/modules directory, using
one directory per module. This ensures that custom versions of modules that already exist in the
system directory are loaded instead of the shipped versions. In this way, user-provided modules
will take precedence over system modules.
If you use the JBOSS_MODULEPATH environment variable to change the locations in which JBoss
EAP searches for modules, then the product will look for a system subdirectory structure within one
of the locations specified. A system structure must exist somewhere in the locations specified with
JBOSS_MODULEPATH.
Dynamic Modules
Dynamic modules are created and loaded by the application server for each JAR or WAR
deployment (or subdeployment in an EAR). The name of a dynamic module is derived from the
name of the deployed archive. Because deployments are loaded as modules, they can configure
dependencies and be used as dependencies by other deployments.
Modules are only loaded when required. This usually only occurs when an application is deployed
that has explicit or implicit dependencies.
6.2. MODULE DEPENDENCIES
A module dependency is a declaration that one module requires the classes of one or more other
modules in order to function. When JBoss EAP loads a module, the modular class loader parses the
dependencies of that module and adds the classes from each dependency to its class path. If a
specified dependency cannot be found, the module will fail to load.
Note
See the Modules section for complete details about modules and the modular class
loading system.
Deployed applications (a JAR or WAR, for example) are loaded as dynamic modules and make use
of dependencies to access the APIs provided by JBoss EAP.
There are two types of dependencies: explicit and implicit.
Explicit Dependencies
Explicit dependencies are declared by the developer in a configuration file. A static module
can declare dependencies in its module.xml file. A dynamic module can declare
dependencies in the deployment’s MANIFEST.MF or jboss-deploymentstructure.xml deployment descriptor.
Implicit Dependencies
Implicit dependencies are added automatically by JBoss EAP when certain conditions or
meta-data are found in a deployment. The Java EE 7 APIs supplied with JBoss EAP are
examples of modules that are added by detection of implicit dependencies in deployments.
Deployments can also be configured to exclude specific implicit dependencies by using the
jboss-deployment-structure.xml deployment descriptor file. This can be useful
when an application bundles a specific version of a library that JBoss EAP will attempt to
add as an implicit dependency.
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Optional Dependencies
Explicit dependencies can be specified as optional. Failure to load an optional dependency will not
cause a module to fail to load. However, if the dependency becomes available later it will not be
added to the module’s class path. Dependencies must be available when the module is loaded.
Export a Dependency
A module’s class path contains only its own classes and that of its immediate dependencies. A
module is not able to access the classes of the dependencies of one of its dependencies. However,
a module can specify that an explicit dependency is exported. An exported dependency is provided
to any module that depends on the module that exports it.
For example, Module A depends on Module B, and Module B depends on Module C. Module A can
access the classes of Module B, and Module B can access the classes of Module C. Module A
cannot access the classes of Module C unless:
Module A declares an explicit dependency on Module C, or
Module B exports its dependency on Module C.
Global Modules
A global module is a module that JBoss EAP provides as a dependency to every application. Any
module can be made global by adding it to JBoss EAP’s list of global modules. It does not require
changes to the module.
See the Define Global Modules section for details.
6.3. CREATE A CUSTOM MODULE
Use the module add management CLI command to add a custom static module to make resources
available for deployments running on JBoss EAP.
1. Start the JBoss EAP server.
2. Launch the management CLI, but do not use the --connect or -c argument to connect to
the running instance.
$ EAP_HOME/bin/jboss-cli.sh
3. Use the module add management CLI command to add the new core module.
module add --name=MODULE_NAME --resources=PATH_TO_RESOURCE -dependencies=DEPENDENCIES
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Note
The module add management CLI command performs the following steps,
which could instead be completed manually if desired:
1. A file path structure will be created under the EAP_HOME/modules
directory. For example, for a MySQL JDBC driver, the following will be
created: EAP_HOME/modules/com/mysql/main/.
2. The JAR files specified as resources will be copied to the main/
subdirectory.
3. A module.xml file with the specified dependencies will be created in the
main/ subdirectory.
Execute module --help for more details on using this command to add and remove
modules.
In order for your application to be able to access this module’s resources, you will need to add the
module as a dependency.
See the Define Global Modules section for instructions on adding modules as dependencies to
all applications.
For example, the following steps add a JAR file that contains several properties files as a module, so
that the application can then load these properties.
1. Add the JAR file as a core module.
module add --name=myprops --resources=/path/to/properties.jar
2. Define this module as a global module so that it is made available to all deployments.
/subsystem=ee:write-attribute(name=global-modules,value=
[{name=myprops}]
3. The application could then retrieve the properties from one of the properties files contained
within the JAR.
Thread.currentThread().getContextClassLoader().getResource("my.prop
erties");
6.4. DEFINE GLOBAL MODULES
A list of global modules can be defined for JBoss EAP, which will add the modules as dependencies
to all deployments.
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Note
You must know the name of the modules that are to be configured as global modules.
See the Dynamic Module Naming section for naming conventions for modules in
deployments.
Use the following management CLI command to define the list of global modules.
/subsystem=ee:write-attribute(name=global-modules,value=
[{name=MODULE_NAME_1},{name=MODULE_NAME_2}]
Global modules can also be added and removed using the management console by navigating to
the EE subsystem from the Configuration tab and selecting the Global Modules section.
6.5. CONFIGURE SUBDEPLOYMENT ISOLATION
Each subdeployment in an Enterprise Archive (EAR) is a dynamic module with its own class loader.
Subdeployments always have an implicit dependency on the parent module, which gives them
access to classes in EAR/lib. By default, a subdeployment can access the resources of other
subdeployments within that EAR.
If you do not want a subdeployment to be allowed to access classes belonging to other
subdeployments, then strict subdeployment isolation can be enabled in JBoss EAP. This setting will
affect all deployments.
Enable Subdeployment Module Isolation for All Deployments
Subdeployment isolation can be enabled or disabled using the management console or the
management CLI from the EE subsystem. By default, subdeployment isolation is set to false, which
allows the subdeployments to access resources of other subdeployments within an EAR
deployment.
Use the following management CLI to enable EAR subdeployment isolation.
/subsystem=ee:write-attribute(name=ear-subdeploymentsisolated,value=true)
Subdeployments in an EAR will no longer be able to access resources from other subdeployments.
6.6. DEFINE AN EXTERNAL JBOSS EAP MODULE DIRECTORY
The default directory for JBoss EAP modules is EAP_HOME/modules. You can specify a different
directory for JBoss EAP modules using the JBOSS_MODULEPATH variable. Follow the below steps
to set this variable in the JBoss EAP startup configuration file.
Note
You can also set JBOSS_MODULEPATH as an environment variable instead of setting this
in the JBoss EAP startup configuration files.
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1. Edit the startup configuration file.
When running as a standalone server, edit the EAP_HOME/bin/standalone.conf
file (or standalone.conf.bat for Windows Server).
When running in a managed domain, edit the EAP_HOME/bin/domain.conf file (or
domain.conf.bat for Windows Server).
2. Set the JBOSS_MODULEPATH variable, for example:
JBOSS_MODULEPATH="/path/to/modules/directory/"
To specify a list of directories use a colon (:) to delimit the list of directories.
Note
For Windows Server, use the following syntax to set the JBOSS_MODULEPATH
variable:
set "JBOSS_MODULEPATH /path/to/modules/directory/"
To specify a list of directories use a semicolon (;) to delimit the list of directories.
6.7. DYNAMIC MODULE NAMING CONVENTIONS
JBoss EAP loads all deployments as modules, which are named according to the following
conventions.
Deployments of WAR and JAR files are named using the following format:
deployment.DEPLOYMENT_NAME
For example, inventory.war and store.jar will have the module names of
deployment.inventory.war and deployment.store.jar respectively.
Subdeployments within an Enterprise Archive (EAR) are named using the following format:
deployment.EAR_NAME.SUBDEPLOYMENT_NAME
For example, the subdeployment of reports.war within the enterprise archive accounts.ear
will have the module name of deployment.accounts.ear.reports.war.
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CHAPTER 7. DEPLOYING APPLICATIONS
JBoss EAP features a range of application deployment and configuration options to cater to both
administrators and developers. For administrators, the management console and the management
CLI offer ideal graphical and command-line interfaces to manage application deployment in a
production environment. For developers, the range of application deployment testing options include
a configurable file system deployment scanner, the HTTP API, an IDE such as Red Hat JBoss
Developer Studio, and Maven.
When deploying applications, you may want to enable validation for deployment descriptors by
setting the org.jboss.metadata.parser.validate system property to true. This can be
done one of the following ways:
While starting the server.
$ EAP_HOME/bin/standalone.sh Dorg.jboss.metadata.parser.validate=true
By adding it to the server configuration with the following management CLI command.
/system-property=org.jboss.metadata.parser.validate:add(value=true)
7.1. DEPLOYING APPLICATIONS USING THE MANAGEMENT CLI
Deploying applications using the management CLI gives you the benefit of single command-line
interface with the ability to create and run deployment scripts. You can use this scripting ability to
configure specific application deployment and management scenarios. You can manage the
deployments for a single server when running as a standalone server, or an entire network of
servers when running in a managed domain.
7.1.1. Deploy an Application to a Standalone Server
Deploy an Application
From the management CLI, use the deploy command and specify the path to the application
deployment.
deploy /path/to/test-application.war
A successful deployment does not produce any output to the management CLI, but the server log
displays deployment messages.
WFLYSRV0027: Starting deployment of "test-application.war" (runtimename: "test-application.war")
WFLYUT0021: Registered web context: /test-application
WFLYSRV0010: Deployed "test-application.war" (runtime-name : "testapplication.war")
The application has been successfully deployed.
Undeploy an Application
From the management CLI, use the undeploy command and specify the deployment name.
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To undeploy the application and delete the deployment content.
undeploy test-application.war
To undeploy the application without removing the deployment content from the repository.
undeploy test-application.war --keep-content
A successful undeployment does not produce any output to the management CLI, but the server log
displays undeployment messages.
WFLYUT0022: Unregistered web context: /test-application
WFLYSRV0028: Stopped deployment test-application.war (runtime-name:
test-application.war) in 62ms
WFLYSRV0009: Undeployed "test-application.war" (runtime-name: "testapplication.war")
The application has been successfully undeployed.
List Deployments
From the management CLI, use the deploy -l command to list all deployments.
deploy -l
The output will show details about each deployment, such as the runtime name and whether it is
enabled.
NAME
test-application.war
jboss-helloworld.war
RUNTIME-NAME
test-application.war
jboss-helloworld.war
ENABLED STATUS
true
OK
true
OK
7.1.2. Deploy an Application in a Managed Domain
Deploy an Application
From the management CLI, use the deploy command and specify the path to the application
deployment. You must also specify the server groups to which the application should be deployed.
To deploy the application to all server groups.
deploy /path/to/test-application.war --all-server-groups
To deploy the application to specific server groups.
deploy /path/to/test-application.war --server-groups=main-servergroup,other-server-group
A successful deployment does not produce any output to the management CLI, but the server log
displays deployment messages for each affected server.
[Server:server-one] WFLYSRV0027: Starting deployment of "testapplication.war" (runtime-name: "test-application.war")
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[Server:server-one] WFLYUT0021: Registered web context: /testapplication
[Server:server-one] WFLYSRV0010: Deployed "test-application.war"
(runtime-name : "test-application.war")
The application has been successfully deployed to the appropriate server groups in your managed
domain.
Undeploy an Application
From the management CLI, use the undeploy command and specify the deployment name. You
must also specify the server groups from which the application should be undeployed.
To undeploy the application from all server groups with that deployment.
undeploy test-application.war --all-relevant-server-groups
To undeploy the application from specific server groups. Note that the --keep-content
parameter is required, as the content must remain in the repository for other server groups with
that deployment.
undeploy test-application.war --server-groups=other-server-group -keep-content
A successful undeployment does not produce any output to the management CLI, but the server log
displays undeployment messages for each affected server.
[Server:server-one] WFLYUT0022: Unregistered web context: /testapplication
[Server:server-one] WFLYSRV0028: Stopped deployment testapplication.war (runtime-name: test-application.war) in 74ms
[Server:server-one] WFLYSRV0009: Undeployed "test-application.war"
(runtime-name: "test-application.war")
The application has been successfully undeployed.
List Deployments
From the management CLI, use the deploy -l command to list all deployments.
deploy -l
The output will list each deployment and its runtime name.
NAME
test-application.war
jboss-helloworld.war
RUNTIME-NAME
test-application.war
jboss-helloworld.war
7.2. DEPLOYING APPLICATIONS USING THE MANAGEMENT
CONSOLE
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Deploying applications using the management console gives you the benefit of a graphical interface
that is easy to use. You can see at a glance which applications are deployed to your server or
server groups, and you can enable, disable or remove applications from the content repository as
required.
7.2.1. Deploy an Application to a Standalone Server
Deployments can be viewed and managed from the Deployments tab of the JBoss EAP
management console.
Deploy an Application
Click the Add button and use the New Deployment wizard to deploy an application. You can
choose to deploy an application by uploading a deployment or creating an unmanaged deployment.
Deployments are enabled by default.
Upload a deployment
Upload an application that will be copied to the server’s content repository and managed by
JBoss EAP.
Create an unmanaged deployment
Specify the location of a deployment. This deployment will not be copied to the server’s content
repository and will not be managed by JBoss EAP. Note that exploded deployments are only
supported as unmanaged.
Undeploy an Application
Select the deployment and choose the Remove option to undeploy the application.
Disable an Application
Select the deployment and choose the Disable option to disable the application.
Replace an Application
Select the deployment and choose the Replace option. Select the new version of the deployment,
which must have the same name as the original, and click Finish. This undeploys and removes the
original version of the deployment, and then deploys the new version.
7.2.2. Deploy an Application in a Managed Domain
From the Deployments tab of the JBoss EAP management console, deployments can be viewed
and managed by:
Content Repository
All managed and unmanaged deployments are listed in the Content Repository section.
Deployments can be added and assigned to server groups here.
Unassigned Content
Deployments that have not been assigned to any server groups are listed in the Unassigned
Content section. Deployments can be assigned to server groups or removed here.
Server Groups
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Deployments that have been assigned to one or more server groups are listed in the Server
Groups section. Deployments can be enabled and added directly to a server group here.
Deploy an Application
1. From Content Repository, click the Add button.
2. Choose to deploy an application by uploading a deployment or creating an unmanaged
deployment.
3. Follow the prompts to deploy the application.
Note that a deployment must be assigned to a server group before it can be enabled.
Deployments can also be added, assigned to a server group, and enabled in one step by adding the
deployment from Server Groups.
Assign an Application to a Server Group
1. From Unassigned Content, select a deployment and click the Assign button.
2. Select one or more server groups to which this deployment should be assigned.
3. Optionally, select the option to enable the deployment on the selected server groups.
Unassign an Application from a Server Group
1. From Server Groups, select the appropriate server group.
2. Select the desired deployment and click the Unassign button.
Deployments can also be unassigned from multiple server groups at once by selecting the
Unassign button for the deployment in Content Repository.
Undeploy an Application
1. If the deployment is still assigned to any server groups, be sure to unassign the deployment.
2. From Content Repository, select the deployment and click the Remove button.
Disable an Application
1. From Server Groups, select the appropriate server group.
2. Select the desired deployment and click the Disable button.
Replace an Application
1. From Content Repository, select the deployment and click the Replace button.
2. Select the new version of the deployment, which must have the same name as the original,
and click Finish.
This undeploys and removes the original version of the deployment, and then deploys the new
version.
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7.3. DEPLOYING APPLICATIONS USING THE DEPLOYMENT
SCANNER
The deployment scanner monitors the deployment directory for applications to deploy. By default,
the deployment scanner scans the EAP_HOME/standalone/deployments/ directory every five
seconds for changes. Marker files are used to indicate the status of a deployment and to trigger
actions against deployments, such as undeploying or redeploying.
While it is recommended to use the management console or management CLI for application
deployment in a production environment, deploying using the deployment scanner is provided for
the convenience of developers. This allows users build and test applications in a manner suited for
rapid development cycles. Additionally, the deployment scanner should not be used in conjunction
with other deployment methods.
The deployment scanner is only available when running JBoss EAP as a standalone server.
7.3.1. Deploy an Application to a Standalone Server
The deployment scanner can be configured to allow or disallow automatic deployment of XML,
zipped, and exploded content. If automatic deployment is disabled, you must manually create
marker files to trigger deployment actions. For more information about the available marker file types
and their purposes, see the Deployment Scanner Marker Files section.
By default, automatic deployment for XML and zipped content is enabled. For details on configuring
automatic deployment for each content type, see Configure the Deployment Scanner.
Warning
Deploying using the deployment scanner is provided for the convenience of developers
and is not recommended for use in a production environment. It should also not be used
in conjunction with other deployment methods.
Deploy an Application
Copy the content to the deployment folder.
$ cp /path/to/test-application.war EAP_HOME/standalone/deployments/
If auto-deployment is enabled, this file will be picked up automatically, deployed, and a .deployed
marker file will be created. If auto-deployment is not enabled, then you will need to manually add a
.dodeploy marker file to trigger deployment.
$ touch EAP_HOME/standalone/deployments/test-application.war.dodeploy
Undeploy an Application
Trigger an undeployment by removing the .deployed marker file.
$ rm EAP_HOME/standalone/deployments/test-application.war.deployed
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If auto-deployment is enabled, you can also remove the test-application.war file, which will
trigger the undeployment. Note that this does not apply for exploded deployments.
Redeploy an Application
Create a .dodeploy marker file to initiate redeployment.
$ touch EAP_HOME/standalone/deployments/test-application.war.dodeploy
7.3.2. Configure the Deployment Scanner
The deployment scanner can be configured using the management console or the management CLI.
You can configure the deployment scanner’s behavior, such as the scan interval, deployment folder
location, and autodeployment of certain application file types. You can also disable the deployment
scanner entirely.
For details on all available deployment scanner attributes, see the Deployment Scanner Attributes
section.
Use the below management CLI commands to configure the default deployment scanner.
Disable the Deployment Scanner
/subsystem=deployment-scanner/scanner=default:writeattribute(name=scan-enabled,value=false)
This disables the default deployment scanner.
Change the Scan Interval
/subsystem=deployment-scanner/scanner=default:writeattribute(name=scan-interval,value=10000)
This updates the scan interval time from 5000 milliseconds (five seconds) to 10000 milliseconds
(ten seconds).
Change the Deployment Folder
/subsystem=deployment-scanner/scanner=default:writeattribute(name=path,value=/path/to/deployments)
This changes the location of the deployment folder from the default location of
EAP_HOME/standalone/deployments to /path/to/deployments.
The path value will be treated as an absolute path unless the relative-to attribute is specified,
in which case it will be relative to that path.
Enable the Automatic Deployment of Exploded Content
/subsystem=deployment-scanner/scanner=default:writeattribute(name=auto-deploy-exploded,value=true)
This enables the automatic deployment of exploded content, which is disabled by default.
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Disable the Automatic Deployment of Zipped Content
/subsystem=deployment-scanner/scanner=default:writeattribute(name=auto-deploy-zipped,value=false)
This disables the automatic deployment of zipped content, which is enabled by default.
Disable the Automatic Deployment of XML Content
/subsystem=deployment-scanner/scanner=default:writeattribute(name=auto-deploy-xml,value=false)
This disables the automatic deployment of XML content, which is enabled by default.
7.3.3. Define a Custom Deployment Scanner
A new deployment scanner can be added using the management CLI or by navigating to the
Deployment Scanners subsystem from the Configuration tab in the management console. This
will define a new directory to scan for deployments. The default deployment scanner monitors
EAP_HOME/standalone/deployments. See Configure the Deployment Scanner for details on
configuring an existing deployment scanner.
The following management CLI command adds a new deployment scanner that will check
EAP_HOME/standalone/new_deployment_dir every five seconds for deployments.
/subsystem=deployment-scanner/scanner=newscanner:add(path=new_deployment_dir,relativeto=jboss.server.base.dir,scan-interval=5000)
Note
The specified directory must already exist or this command will fail with an error.
A new deployment scanner has been defined and the specified directory will be monitored for
deployments.
7.4. DEPLOYING APPLICATIONS USING MAVEN
Deploying applications using Apache Maven allows you to easily incorporate deployment to JBoss
EAP into your existing development workflow.
7.4.1. Deploy an Application to a Standalone Server
You can use Maven to deploy applications to JBoss EAP using wildfly-maven-plugin, which
provides simple operations to deploy and undeploy applications to the application server. The JBoss
EAP quickstart pom.xml files initialize wildfly-maven-plugin:
org.wildfly.plugins
wildfly-maven-plugin
${version.wildfly.maven.plugin}
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The following instructions show how to deploy and undeploy the JBoss EAP helloworld quickstart
using Maven.
Deploy an Application
From the helloworld quickstart directory, execute the following Maven command:
$ mvn clean install wildfly:deploy
After issuing the Maven command to deploy, the terminal window shows the following output
indicating a successful deployment.
[INFO] ----------------------------------------------------------------------[INFO] BUILD SUCCESS
[INFO] ----------------------------------------------------------------------[INFO] Total time: 2.981 s
[INFO] Finished at: 2015-12-23T15:06:13-05:00
[INFO] Final Memory: 21M/231M
[INFO] ----------------------------------------------------------------------The deployment can also be confirmed by viewing the server log of the active server instance.
WFLYSRV0027: Starting deployment of "jboss-helloworld.war" (runtimename: "jboss-helloworld.war")
WFLYUT0021: Registered web context: /jboss-helloworld
WFLYSRV0010: Deployed "jboss-helloworld.war" (runtime-name : "jbosshelloworld.war")
Undeploy an Application
From the helloworld quickstart directory, execute the following Maven command:
$ mvn wildfly:undeploy
After issuing the Maven command to undeploy, the terminal window shows the following output
indicating a successful undeployment.
[INFO] ----------------------------------------------------------------------[INFO] BUILD SUCCESS
[INFO] ----------------------------------------------------------------------[INFO] Total time: 1.237 s
[INFO] Finished at: 2015-12-23T15:09:10-05:00
[INFO] Final Memory: 10M/183M
[INFO] ----------------------------------------------------------------------The undeployment can also be confirmed by viewing the server log of the active server instance.
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WFLYUT0022: Unregistered web context: /jboss-helloworld
WFLYSRV0028: Stopped deployment jboss-helloworld.war (runtime-name:
jboss-helloworld.war) in 27ms
WFLYSRV0009: Undeployed "jboss-helloworld.war" (runtime-name: "jbosshelloworld.war")
7.5. DEPLOYING APPLICATIONS USING THE HTTP API
Applications can be deployed to JBoss EAP using the HTTP API with the curl command.
Deploy an Application
$ curl --digest -L -D - http://HOST:PORT/management --header "ContentType: application/json" -d '{"operation" : "composite", "address" : [],
"steps" : [{"operation" : "add", "address" : {"deployment" : "testapplication.war"}, "content" : [{"url" : "file:/path/to/testapplication.war"}]},{"operation" : "deploy", "address" : {"deployment" :
"test-application.war"}}],"json.pretty":1}' -u USER:PASSWORD
Undeploy an Application
$ curl --digest -L -D - http://HOST:PORT/management --header "ContentType: application/json" -d '{"operation" : "composite", "address" : [],
"steps" : [{"operation" : "undeploy", "address" : {"deployment" : "testapplication.war"}},{"operation" : "remove", "address" : {"deployment" :
"test-application.war"}}],"json.pretty":1}' -u USER:PASSWORD
See this Red Hat Knowledgebase article to learn more about programmatically generating the JSON
requests.
7.6. CUSTOMIZING DEPLOYMENT BEHAVIOR
7.6.1. Define a Custom Directory for Deployment Content
You can define a custom location for JBoss EAP to store deployed content.
Define a Custom Directory for a Standalone Server
By default, deployed content for a standalone server is stored in the
EAP_HOME/standalone/data/content directory. This location can be changed by passing in
the -Djboss.server.deploy.dir argument when starting the server.
$ EAP_HOME/bin/standalone.sh Djboss.server.deploy.dir=/path/to/new_deployed_content
The chosen location should be unique among JBoss EAP instances.
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Note
The jboss.server.deploy.dir property specifies the directory to be used for storing
content that has been deployed using the management console or management CLI. To
define a custom deployment directory to be monitored by the deployment scanner, see
Configure the Deployment Scanner.
Define a Custom Directory for a Managed Domain
By default, deployed content for a managed domain is stored in the
EAP_HOME/domain/data/content directory. This location can be changed by passing in the Djboss.domain.deployment.dir argument when starting the domain.
$ EAP_HOME/bin/domain.sh Djboss.domain.deployment.dir=/path/to/new_deployed_content
The chosen location should be unique among JBoss EAP instances.
7.6.2. Control the Order of Deployments
JBoss EAP offers fine-grained control over the order of deployments when the server is started.
Strict order of the deployment of applications present in multiple EAR files can be specified along
with persistence of the order after a restart.
You can use the jboss-all.xml deployment descriptor to declare dependencies between toplevel deployments.
For example, if you have an app.ear that depends on framework.ear being deployed first, then
you can create an app.ear/META-INF/jboss-all.xml file as shown below.
This ensures that framework.ear is deployed before app.ear.
7.6.3. Override Deployment Content
A deployment overlay can be used to overlay content into an existing deployment without physically
modifying the contents of the deployment archive. This can override deployment descriptors, JAR
files, classes, JSP pages, and other files at runtime.
When defining a deployment overlay, you specify the file on a file system that will replace the file in
the deployment archive. You must also specify which deployments should be affected by the
deployment overlay. Any affected deployments must be redeployed in order for the changes to take
effect.
Use the deployment-overlay add management CLI command to add a deployment overlay.
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deployment-overlay add --name=new-deployment-overlay --content=WEBINF/web.xml=/path/to/other/web.xml --deployments=test-application.war -redeploy-affected
Note
In a managed domain, specify the applicable server groups by using --server-groups
or specify all server groups with --all-server-groups.
Once created, you can add content to an existing overlay, link the overlay to a deployment, or
remove the overlay. For full usage details, execute deployment-overlay --help.
Parameters
name
The name of the deployment overlay.
content
Comma-separated list that maps the file on the file system to the file in the archive that it will
replace. The format for each entry is ARCHIVE_PATH=FILESYSTEM_PATH.
deployments
Comma-separated list of deployments to which this overlay will be linked.
redeploy-affected
Redeploys all affected deployments.
7.6.4. Specify Operation Headers
When deploying applications using the management CLI, you can specify operation headers to
control certain aspects of how the deployment operation executes. The following operation headers
can be passed to the deploy command using the --headers argument.
allow-resource-service-restart - Whether to restart runtime services that require a
restart in order for the operation’s changes take effect. This defaults to false.
blocking-timeout - The maximum time in seconds that the operation should block at any
one point in its completion process before the operation is rolled back. This defaults to 300
seconds.
rollback-on-runtime-failure - Whether persistent configuration changes should be
reverted if applying the changes to runtime services fails. This defaults to true.
rollout - The rollout plan for a managed domain deployment. For more information, see the
Using Rollout Plans section.
For example:
deploy /path/to/deployment.war --headers={allow-resource-servicerestart=true}
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Use a semicolon (;) to separate multiple operation headers.
7.6.5. Using Rollout Plans
About Rollout Plans
In a managed domain, operations targeted at domain or host level resources can potentially impact
multiple servers. Such operations can include a roll out plan detailing the sequence in which the
operation would be applied to the servers, as well as the policies for detailing whether the operation
could be reverted if it fails to execute successfully on some servers. If no rollout plan is specified, the
default rollout plan is used.
Below is an example rollout plan involving five server groups. Operations can be applied to server
groups serially (in-series) or concurrently (concurrent-groups). The syntax is described in
more detail in Rollout Plan Syntax.
{"my-rollout-plan" => {"rollout-plan" => {
"in-series" => [
{"concurrent-groups" => {
"group-A" => {
"max-failure-percentage" => "20",
"rolling-to-servers" => "true"
},
"group-B" => undefined
}},
{"server-group" => {"group-C" => {
"rolling-to-servers" => "false",
"max-failed-servers" => "1"
}}},
{"concurrent-groups" => {
"group-D" => {
"max-failure-percentage" => "20",
"rolling-to-servers" => "true"
},
"group-E" => undefined
}}
],
"rollback-across-groups" => "true"
}}}
Looking at the example above, applying the operation to the servers in the domain is done in three
phases. If the policy for any server group triggers a rollback of the operation across the server
group, all other server groups will be rolled back as well.
1. Server groups group-A and group-B will have the operation applied concurrently. The
operation will be applied to the servers in group-A in series, while all servers in group-B will
handle the operation concurrently. If more than 20% of the servers in group-A fail to apply
the operation, it will be rolled back across that group. If any servers in group-B fail to apply
the operation it will be rolled back across that group.
2. Once all servers in group-A and group-B are complete, the operation will be applied to the
servers in group-C. Those servers will handle the operation concurrently. If more than one
server in group-C fails to apply the operation it will be rolled back across that group.
3. Once all servers in group-C are complete, server groups group-D and group-E will have the
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operation applied concurrently. The operation will be applied to the servers in group-D in
series, while all servers in group-E will handle the operation concurrently. If more than 20%
of the servers in group-D fail to apply the operation, it will be rolled back across that group. If
any servers in group-E fail to apply the operation it will be rolled back across that group.
Rollout Plan Syntax
You can specify a rollout plan in either of the following ways.
By defining the rollout plan in the deploy command operation headers. See Deploy Using a
Rollout Plan for details.
By storing the rollout plan using the rollout-plan command and then referencing the plan
name in the deploy command operation headers. See Deploy Using a Stored Rollout Plan for
details.
Although each method has a different initial command, both methods use the rollout operation
header to define the rollout plan. This uses the following syntax.
rollout (id=PLAN_NAME | SERVER_GROUP_LIST) [rollback-across-groups]
PLAN_NAME is the name for the rollout plan that was stored using the rollout-plan
command.
SERVER_GROUP_LIST is the list of server groups. Use a comma (,) to separate multiple server
groups to indicate that that operations should be performed on each server group sequentially.
Use a caret (^) separator to indicate that operations should be performed on each server group
concurrently.
For each server group, set any of the following policies in parentheses. Comma separate
multiple policies.
rolling-to-servers: A boolean which if set to true, the operation will be applied to
each server in the group in series. If the value is false or not specified, the operation will
be applied to the servers in the group concurrently.
max-failed-servers: An integer which takes the maximum number of servers in the
group that can fail to apply the operation before it should be reverted on all servers in the
group. The default value if not specified is 0, meaning that a failure on any server will
trigger rollback across the group.
max-failure-percentage: An integer between 0 and 100 that represents the
maximum percentage of the total number of servers in the group that can fail to apply the
operation before it should be reverted on all servers in the group. The default value if not
specified is 0, meaning that a failure on any server will trigger rollback across the group.
Note
If both max-failed-servers and max-failure-percentage are set to
non-zero values, max-failure-percentage takes precedence.
rollback-across-groups: A boolean that indicates whether the need to rollback the
operation on all the servers in one server group triggers a rollback across all the server groups.
This defaults to false.
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Deploy Using a Rollout Plan
You can provide the full details of a rollout plan directly to the deploy command by passing the
rollout settings into the headers argument. See the Rollout Plan Syntax for more information on
the format.
The following management CLI command deploys an application to the main-server-group
server group using a deployment plan that specifies rolling-to-servers=true for serial
deployment.
deploy /path/to/test-application.war --server-groups=main-server-group
--headers={rollout main-server-group(rolling-to-servers=true)}
Deploy Using a Stored Rollout Plan
Since rollout plans can be complex, you have the option to store the details of a rollout plan. This
allows you to reference the rollout plan name when you want to use it instead of requiring the full
details of the rollout plan each time.
1. Use the rollout-plan management CLI command to store a rollout plan. See the Rollout
Plan Syntax for more information on the format.
rollout-plan add --name=my-rollout-plan --content={rollout mainserver-group(rolling-to-servers=false,max-failedservers=1),other-server-group(rolling-to-servers=true,maxfailure-percentage=20) rollback-across-groups=true}
This creates the following deployment plan.
"rollout-plan" => {
"in-series" => [
{"server-group" => {"main-server-group" => {
"rolling-to-servers" => false,
"max-failed-servers" => 1
}}},
{"server-group" => {"other-server-group" => {
"rolling-to-servers" => true,
"max-failure-percentage" => 20
}}}
],
"rollback-across-groups" => true
}
2. Specify the stored rollout plan name when deploying the application.
The following management CLI command deploys an application to all server groups using
the my-rollout-plan stored rollout plan.
deploy /path/to/test-application.war --all-server-groups -headers={rollout id=my-rollout-plan}
Default Rollout Plan
All operations that impact multiple servers will be executed with a rollout plan. If no rollout plan is
specified in the operation request, a default rollout plan will be generated. The plan will have the
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following characteristics.
There will only be a single high-level phase. All server groups affected by the operation will have
the operation applied concurrently.
Within each server group, the operation will be applied to all servers concurrently.
Failure on any server in a server group will cause rollback across the group.
Failure of any server group will result in rollback of all other server groups.
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CHAPTER 8. DOMAIN MANAGEMENT
This section discusses concepts and configuration specific to the managed domain operating mode.
For information on securing a managed domain, see the Securing a Managed Domain section of the
JBoss EAP How to Configure Server Security guide.
8.1. ABOUT MANAGED DOMAINS
The managed domain operating mode allows for the management of multiple JBoss EAP instances
from a single control point.
Centrally-managed JBoss EAP server collections are known as members of a domain. All JBoss
EAP instances in a domain share a common management policy.
A domain consists of one domain controller, one or more host controllers, and zero or more server
groups per host.
A domain controller is the central point from which the domain is controlled. It ensures that each
server is configured according to the management policy of the domain. The domain controller is
also a host controller.
A host controller is a physical or virtual host that interacts with the domain controller to control the
lifecycle of the application server instances running on its host and to assist the domain controller to
manage them. Each host can contain multiple server groups.
A server group is a set of server instances which have JBoss EAP installed on them and are
managed and configured as one. The domain controller manages the configuration of and
applications deployed onto server groups. Consequently, each server in a server group shares the
same configuration and deployments.
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Host controllers are tied to specific physical (or virtual) hosts. You can run multiple host controllers
on the same hardware if you use different configurations, ensuring their ports and other resources
do not conflict. It is possible for a domain controller, a single host controller, and multiple servers to
run within the same JBoss EAP instance, on the same physical system.
8.1.1. About the Domain Controller
A domain controller is the JBoss EAP server instance that acts as a central management point for a
domain. One host controller instance is configured to act as a domain controller.
The primary responsibilities of the domain controller are:
Maintain the domain’s central management policy.
Ensure all host controllers are aware of its current contents.
Assist the host controllers in ensuring that all running JBoss EAP server instances are
configured in accordance with this policy.
By default, the central management policy is stored in the
EAP_HOME/domain/configuration/domain.xml file. This file is required in this directory of the
host controller that is set to run as the domain controller.
The domain.xml file contains profile configurations available for use by the servers in the domain.
A profile contains the detailed settings of the various subsystems available in that profile. The
domain configuration also includes the definition of socket groups and the server group definitions.
Note
It is possible for a JBoss EAP 7 domain controller to administer JBoss EAP 6 hosts and
servers, as long as the hosts and servers are running JBoss EAP 6.2 or later.
For more information, see the Start a Managed Domain and Configure the Domain Controller
sections.
8.1.2. About Host Controllers
The primary responsibility of a host controller is server management. It delegates domain
management tasks and is responsible for starting and stopping the individual application server
processes that run on its host.
It interacts with the domain controller to help manage the communication between the servers and
the domain controller. Multiple host controllers of a domain can interact with only a single domain
controller. Hence, all the host controllers and server instances running on a single domain mode
have a single domain controller and must belong to the same domain.
By default, each host controller reads its configuration from the
EAP_HOME/domain/configuration/host.xml file located in the unzipped JBoss EAP
installation file on its host’s file system. The host.xml file contains the following configuration
information that is specific to the particular host:
The names of the server instances meant to run from this installation.
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Configurations specific to the local physical installation. For example, named interface
definitions declared in domain.xml can be mapped to an actual machine-specific IP address in
host.xml. And abstract path names in domain.xml can be mapped to actual file system paths
in host.xml.
Any of the following configurations:
How the host controller contacts the domain controller to register itself and access the
domain configuration.
How to find and contact a remote domain controller.
Whether the host controller is to act as the domain controller
For more information, see the Start a Managed Domain and Configure Host Controllers sections.
8.1.3. About Server Groups
A server group is a collection of server instances that are managed and configured as one. In a
managed domain, every application server instance belongs to a server group, even if it is the only
member. The server instances in a group share the same profile configuration and deployed
content.
A domain controller and a host controller enforce the standard configuration on all server instances
of every server group in its domain.
A domain can consist of multiple server groups. Different server groups can be configured with
different profiles and deployments. A domain can be configured with different server tiers providing
different services, for example.
Different server groups can also have the same profile and deployments. This can, for example,
allow for rolling application upgrades where the application is upgraded on one server group and
then updated on a second server group, avoiding a complete service outage.
For more information, see the Configuring Server Groups section.
8.1.4. About Servers
A server represents an application server instance. In a managed domain, all server instances are
members of a server group. The host controller launches each server instance in its own JVM
process.
For more information, see the Configuring Servers section.
8.2. NAVIGATING DOMAIN CONFIGURATIONS
JBoss EAP provides scalable management interfaces to support both small and large-scale
managed domains.
Management Console
The JBoss EAP management console provides a graphical view of your domain and allows you to
easily manage hosts, servers, deployments, and profiles for your domain.
Configuration
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From the Configuration tab, you can configure the subsystems for each profile used in
your domain. Different server groups in your domain may use different profiles depending
the capabilities needed.
Once you select the desired profile, all available subsystems for that profile are listed. For
more information on configuring profiles, see Managing JBoss EAP Profiles.
Runtime
From the Runtime tab, you can manage servers and server groups as well as host
configuration. You can browse the domain by host or by server group.
From Hosts, you can configure host properties and JVM settings as well as add and
configure servers for that host.
From Server Groups, you can add new server groups and configure properties and JVM
settings as well as add and configure servers for that server group. You can perform
operations such as starting, stopping, suspending, and reloading all servers in the selected
server group.
From either Hosts or Server Groups, you can add new servers and configure server
properties and JVM settings. You can perform operations such as starting, stopping,
suspending, and reloading the selected server. You can also view runtime information, such
as JVM usage, server logs, and subsystem-specific information.
Deployments
From the Deployments tab, you can add and assign deployments to server groups. You
can view all deployments in the content repository, view all unassigned deployments, or
view deployments assigned to a particular server group.
For more information on deploying applications using the management console, see Deploy
an Application in a Managed Domain
Management CLI
The JBoss EAP management CLI provides a command-line interface to manage hosts, servers,
deployments and profiles for your domain.
Subsystem configuration can be accessed once the appropriate profile is selected.
/profile=PROFILE_NAME/subsystem=SUBSYSTEM_NAME:readresource(recursive=true)
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Note
Instructions and examples throughout this guide may contain management CLI
commands for subsystem configuration that apply when running as a standalone server,
for example:
/subsystem=datasources/data-source=ExampleDS:read-resource
To adjust these management CLI commands to be run in a managed domain, you must
specify the appropriate profile to configure, for example:
/profile=default/subsystem=datasources/datasource=ExampleDS:read-resource
After specifying the appropriate host, you can configure host settings and perform operations on
servers on that host.
/host=HOST_NAME/server=SERVER_NAME:read-resource
After specifying the appropriate host, you can configure servers for that host.
/host=HOST_NAME/server-config=SERVER_NAME:writeattribute(name=ATTRIBUTE_NAME,value=VALUE)
After specifying the appropriate server group, you can configure server group settings and perform
operations on all servers in the selected server group.
/server-group=SERVER_GROUP_NAME:read-resource
You can deploy applications in a managed domain by using the deploy management CLI
command and specifying the appropriate server groups. For instructions, see Deploy an Application
in a Managed Domain
8.3. LAUNCHING A MANAGED DOMAIN
8.3.1. Start a Managed Domain
Domain and host controllers can be started using the domain.sh or domain.bat script provided
with JBoss EAP. For a complete listing of all available startup script arguments and their purposes,
use the --help argument or see the Server Runtime Arguments section.
The domain controller must be started before any slave servers in any server groups in the domain.
Start the domain controller first, then start any other associated host controllers in the domain.
Start the Domain Controller
Start the domain controller with the host-master.xml configuration file, which is preconfigured for
a dedicated domain controller.
$ EAP_HOME/bin/domain.sh --host-config=host-master.xml
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Depending on your domain setup, you will need to make additional configurations to allow host
controllers to connect. Also see the following example domain setups:
Set Up a Managed Domain on a Single Machine
Set Up a Managed Domain on Two Machines
Start a Host Controller
Start the host controller with the host-slave.xml configuration file, which is preconfigured for a
slave host controller.
$ EAP_HOME/bin/domain.sh
--host-config=host-slave.xml
Depending on your domain setup, you will need to make additional configurations connect to, and
not conflict with, the domain controller. Also see the following example domain setups:
Set Up a Managed Domain on a Single Machine
Set Up a Managed Domain on Two Machines
8.3.2. Configure the Domain Controller
Configure a Host to Act as the Domain Controller
A host is designated to be the domain controller if it includes the declaration.
The host acting as the domain controller must expose a management interface that is accessible to
other hosts in the domain. It is not required to expose an HTTP(S) management interface, but is
recommended as it allows access to the management console.
The EAP_HOME/domain/configuration/host-master.xml file is already preconfigured with
these settings to act as the domain controller.
8.3.3. Configure Host Controllers
Connect to the Domain Controller
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A host controller must be provided with the means to connect to the domain controller so that it can
register itself with the domain. This is configured in the element of the
configuration.
The EAP_HOME/domain/configuration/host-slave.xml file is already preconfigured with
these settings to connect to the domain controller. You will need to provide the
jboss.domain.master.address property when starting the host controller.
$ EAP_HOME/bin/domain.sh --host-config=host-slave.xml Djboss.domain.master.address=IP_ADDRESS
For more information on domain controller discovery, see the Domain Controller Discovery and
Failover section.
Depending on your domain setup, you may also need to provide authentication for the host controller
to be authenticated by the domain controller. See Set Up a Managed Domain on Two Machines for
details on generating a management user with a secret value and updating the host controller
configuration with that value.
8.3.3.1. Configure the Name of a Host
Every host running in a managed domain must have a unique host name. To ease administration
and allow for the use of the same host configuration files on multiple hosts, the server uses the
following precedence for determining the host name.
1. If set, the host element name attribute in the host.xml configuration file.
2. The value of the jboss.host.name system property.
3. The value that follows the final period (.) character in the jboss.qualified.host.name
system property, or the entire value if there is no final period (.) character.
4. The value that follows the period (.) character in the HOSTNAME environment variable for
POSIX-based operating systems, the COMPUTERNAME environment variable for Microsoft
Windows, or the entire value if there is no final period (.) character.
A host controller’s name is configured in the host element at the top of the relevant host.xml
configuration file, for example:
Use the following procedure to update the host name using the management CLI.
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1. Start the JBoss EAP host controller.
$ EAP_HOME/bin/domain.sh --host-config=host-slave.xml
2. Launch the management CLI.
$ EAP_HOME/bin/jboss-cli.sh --connect -controller=DOMAIN_IP_ADDRESS
3. Use the following command to set a new host name.
/host=EXISTING_HOST_NAME:writeattribute(name=name,value=NEW_HOST_NAME)
This modifies the host name attribute in the host-slave.xml file as follows:
4. Reload the host controller in order for the changes to take effect.
reload --host=EXISTING_HOST_NAME
If a host controller does not have a name set in the configuration file, you can also pass in the host
name at runtime.
$ EAP_HOME/bin/domain.sh --host-config=host-slave.xml
Djboss.host.name=HOST_NAME
-
8.3.4. Domain Controller Discovery and Failover
When setting up a managed domain, each host controller must be configured with information
needed to contact the domain controller. In JBoss EAP, each host controller can be configured with
multiple options for finding the domain controller. Host controllers iterate through the list of options
until one succeeds.
This allows host controllers to be preconfigured with contact information for a backup domain
controller. A backup host controller can be promoted to master if there is a problem with the primary
domain controller, allowing host controllers to automatically fail over to the new master once it’s
been promoted.
The following is an example of how to configure a host controller with multiple options for finding the
domain controller.
Example: A Host Controller with Multiple Domain Controller Options
A static discovery option includes the following required attributes:
name
The name for this domain controller discovery option.
host
The remote domain controller’s host name.
port
The remote domain controller’s port.
In the example above, the first discovery option is the one expected to succeed. The second can be
used in failover situations.
If a problem arises with the primary domain controller, a host controller that was started with the -backup option can be promoted to act as the domain controller.
Note
Starting a host controller with the --backup option will cause that controller to maintain a
local copy of the domain configuration. This configuration will be used if the host controller
is reconfigured to act as the domain controller.
Promote a Host Controller to Be the Domain Controller
1. Ensure the original domain controller is stopped.
2. Use the management CLI to connect to the host controller that is to become the new domain
controller.
3. Execute the following command to configure the host controller to act as the new domain
controller.
/host=HOST_NAME:write-local-domain-controller
4. Execute the following command to reload the host controller.
reload --host=HOST_NAME
This host controller will now act as the domain controller.
8.4. MANAGING SERVERS
8.4.1. Configure Server Groups
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The following is an example of a server group definition:
Server groups can be configured using the management CLI or from the management console
Runtime tab.
Add a Server Group
The following management CLI command can be used to add a server group.
/server-group=SERVER_GROUP_NAME:add(profile=PROFILE_NAME,socketbinding-group=SOCKET_BINDING_GROUP_NAME)
Update a Server Group
The following management CLI command can be used to update server group attributes.
/server-group=SERVER_GROUP_NAME:writeattribute(name=ATTRIBUTE_NAME,value=VALUE)
Remove a Server Group
The following management CLI command can be used to remove a server group.
/server-group=SERVER_GROUP_NAME:remove
Server Group Attributes
A server group requires the following attributes:
name: The server group name.
profile: The server group profile name.
socket-binding-group: The default socket binding group used for servers in the group. This
can be overridden on a per-server basis.
A server group includes the following optional attributes:
management-subsystem-endpoint: Set to true to have servers belonging to the server
group connect back to the host controller using the endpoint from their Remoting subsystem (the
Remoting subsystem must be present for this to work).
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socket-binding-default-interface: The socket binding group default interface for this
server.
socket-binding-port-offset: The default offset to be added to the port values given by
the socket binding group.
deployments: The deployment content to be deployed on the servers in the group.
jvm: The default JVM settings for all servers in the group. The host controller merges these
settings with any other configuration provided in host.xml to derive the settings used to launch
the server’s JVM.
deployment-overlays: Links between a defined deployment overlay and deployments in this
server group.
system-properties: The system properties to be set on servers in the group.
8.4.2. Configure Servers
The default host.xml configuration file defines three servers:
A server instance named server-one is associated with main-server-group and inherits the
subsystem configuration and socket bindings specified by that server group. A server instance
named server-two is also associated with main-server-group, but also defines a socket
binding port-offset value, so as not to conflict with the port values used by server-one. A
server instance named server-three is associated with other-server-group and uses that
group’s configurations. It also defines a port-offset value and sets auto-start to false so
that this server does not start when the host controller starts.
Servers can be configured using the management CLI or from the management console Runtime
tab.
Add a Server
The following management CLI command can be used to add a server.
/host=HOST_NAME/server-config=SERVER_NAME:add(group=SERVER_GROUP_NAME)
Update a Server
The following management CLI command can be used to update server attributes.
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/host=HOST_NAME/server-config=SERVER_NAME:writeattribute(name=ATTRIBUTE_NAME,value=VALUE)
Remove a Server
The following management CLI command can be used to remove a server.
/host=HOST_NAME/server-config=SERVER_NAME:remove
Server Attributes
A server requires the following attributes:
name: The name of the server.
group: The name of a server group from the domain model.
A server includes the following optional attributes:
auto-start: Whether or not this server should be started when the host controller starts.
socket-binding-group: The socket binding group to which this server belongs.
socket-binding-port-offset: An offset to be added to the port values given by the socket
binding group for this server.
update-auto-start-with-server-status: Update the auto-start attribute with the
status of the server.
interface: A list of fully-specified named network interfaces available for use on the server.
jvm: The JVM settings for this server. If not declared, the settings are inherited from the parent
server group or host.
path: A list of named file system paths.
system-property: A list of system properties to set on this server.
8.4.3. Start and Stop Servers
You can perform operations on servers, such as starting, stopping, and reloading, from the
management console by navigating to the Runtime tab and selecting the appropriate host or server
group.
See the below commands for performing these operations using the management CLI.
Start Servers
You can start a single server on a particular host.
/host=HOST_NAME/server-config=SERVER_NAME:start
You can start all servers in a specified server group.
/server-group=SERVER_GROUP_NAME:start-servers
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Stop Servers
You can stop a single server on a particular host.
/host=HOST_NAME/server-config=SERVER_NAME:stop
You can stop all servers in a specified server group.
/server-group=SERVER_GROUP_NAME:stop-servers
Reload Servers
You can reload a single server on a particular host.
/host=HOST_NAME/server-config=SERVER_NAME:reload
You can reload all servers in a specified server group.
/server-group=SERVER_GROUP_NAME:reload-servers
8.5. MANAGED DOMAIN SETUPS
8.5.1. Set Up a Managed Domain on a Single Machine
You can run multiple host controllers on a single machine by using the jboss.domain.base.dir
property.
1. Copy the EAP_HOME/domain directory for the domain controller.
$ cp -r EAP_HOME/domain /path/to/domain1
2. Copy the EAP_HOME/domain directory for a host controller.
$ cp -r EAP_HOME/domain /path/to/host1
3. Start the domain controller using /path/to/domain1.
$ EAP_HOME/bin/domain.sh --host-config=host-master.xml Djboss.domain.base.dir=/path/to/domain1
4. Start the host controller using /path/to/host1.
$ EAP_HOME/bin/domain.sh --host-config=host-slave.xml Djboss.domain.base.dir=/path/to/host1 Djboss.domain.master.address=IP_ADDRESS Djboss.management.native.port=PORT
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Note
When starting a host controller, you must specify the address of the domain
controller using the jboss.domain.master.address property.
Additionally, since this host controller is running on the same machine as the
domain controller, you must change the management interface so that it does not
conflict with the domain controller’s management interface. This command sets
the jboss.management.native.port property.
Each instance started in this manner will share the rest of the resources in the base installation
directory (for example, EAP_HOME/modules/), but use the domain configuration from the directory
specified by jboss.domain.base.dir.
8.5.2. Set Up a Managed Domain on Two Machines
Note
You may need to configure your firewall to run this example.
You can create managed domain on two machines, where one machine is a domain controller and
the other machine is a host. For more information, see About the Domain Controller.
IP1 = IP address of the domain controller (Machine 1)
IP2 = IP address of the host (Machine 2)
Create a Managed Domain on Two Machines
1. On Machine 1
a. Add a management user so that the host can be authenticated by the domain
controller.
Use the add-user.sh script to add the management user for the host controller
(HOST_NAME). Make sure to answer yes to the last prompt and note the secret
value provided (
...
b. Start the host controller.
Specify the host-slave.xml configuration file, which is preconfigured for a slave
host controller. Also, set the jboss.domain.master.address property to
connect to the domain controller and the jboss.bind.address property to set the
host controller bind address.
$ EAP_HOME/bin/domain.sh --host-config=host-slave.xml Djboss.domain.master.address=IP1 -Djboss.bind.address=IP2
You can now manage the domain from the management CLI by specifying the domain controller
address with the --controller parameter when launching.
$ EAP_HOME/bin/jboss-cli.sh --connect --controller=IP1
Or you can manage the domain from the management console at http://IP1:9990.
8.6. MANAGING JBOSS EAP PROFILES
8.6.1. About Profiles
JBoss EAP uses profiles as a way to organize which subsystems are available to a server. A profile
consists of a collection of available subsystems along with each subsystem’s specific configuration.
A profile with a large number of subsystems results in a server with a large set of capabilities. A
profile with a small, focused set of subsystems will have fewer capabilities but a smaller footprint.
JBoss EAP comes with four pre-defined profiles that should satisfy most use-cases:
default
Includes commonly used subsystems, such as logging, security, datasources, infinispan,
webservices, ee, ejb3, transactions, etc.
ha
Includes the subsystems provided in the default profile with the addition of the jgroups and
modcluster subsystems for high availability
full
Includes the subsystems provided in the default profile with the addition of the messaging
and iiop subsystems
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full-ha
Includes the subsystems provided in the full profile with the addition of the jgroups and
modcluster subsystems for high availability
Note
JBoss EAP offers the ability to disable extensions or unload drivers and other services
manually by removing the subsystems from the configuration of existing profiles. However,
for most cases this is unnecessary. Since JBoss EAP dynamically loads subsystems as
they are needed, if the server or an application never use a subsystem, it will not be
loaded.
In cases where the existing profiles do not provide the necessary capabilities, JBoss EAP also
provides the ability to define custom profiles as well.
8.6.2. Cloning a Profile
JBoss EAP allows you to create a new profile in a managed domain by cloning an existing profile.
This will create a copy of the original profile’s configuration and subsystems.
A profile can be cloned using the management CLI by using the clone operation on the desired
profile to clone.
/profile=full-ha:clone(to-profile=cloned-profile)
You can also clone a profile from the management console by selecting the desired profile to clone
and clicking Clone.
8.6.3. Creating Hierarchical Profiles
In a managed domain, you can create a hierarchy of profiles. This allows you to create a base
profile with common extensions that other profiles can inherit.
The managed domain defines several profiles in domain.xml. If multiple profiles use the same
configuration for a particular subsystem, you can configure it in just one place instead of different
profiles. The values in parent profiles cannot be overridden.
A profile can include other profiles in a hierarchy using the management CLI by using the list-add
operation and providing the profile to include.
/profile=new-profile:list-add(name=includes, value=PROFILE_NAME)
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CHAPTER 9. CONFIGURING JVM SETTINGS
Configuration of Java Virtual Machine (JVM) settings is different for a standalone JBoss EAP server,
or a JBoss EAP server in a managed domain.
For a standalone JBoss EAP server instance, the server startup processes pass JVM settings to the
JBoss EAP server at startup. These can be declared from the command line before launching JBoss
EAP, or using the System Properties screen in the management console.
In a managed domain, JVM settings are declared in the host.xml and domain.xml configuration
files, and can be configured at host, server group, or server levels.
Note
System properties must be configured in JAVA_OPTS to be used by JBoss EAP modules
(such as the logging manager) during startup.
9.1. CONFIGURING JVM SETTINGS FOR A STANDALONE SERVER
JVM settings for standalone JBoss EAP server instances can be declared at runtime by setting the
JAVA_OPTS environment variable before starting the server.
An example of setting the JAVA_OPTS environment variable on Linux is shown below.
$ export JAVA_OPTS="-Xmx1024M"
The same setting can be used in a Microsoft Windows environment:
set JAVA_OPTS="Xmx1024M"
Alternatively, JVM settings can be added to the standalone.conf file in the EAP_HOME/bin
folder, which contains examples of options to pass to the JVM.
Warning
Setting the JAVA_OPTS environment variable will override the default values from
standalone.conf, which may cause JBoss EAP startup issues.
9.2. CONFIGURING JVM SETTINGS FOR A MANAGED DOMAIN
In a JBoss EAP managed domain, you can define JVM settings at multiple levels. You can define
custom JVM settings on a particular host, and then apply those settings to server groups, or to
individual server instances.
By default, server groups and individual servers will inherit the JVM settings from their parent, but
you can choose to override JVM settings at each level.
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Note
The JVM settings in domain.conf are applied to the Java process of the JBoss EAP
host controller, and not the individual JBoss EAP server instances controlled by that host
controller.
9.2.1. Defining JVM Settings on a Host Controller
You can define JVM settings on a host controller, and apply those settings to server groups or
individual servers. JBoss EAP comes with a default JVM setting, but the following management
CLI command demonstrates creating a new JVM setting named production_jvm with some
custom JVM settings and options.
/host=HOST_NAME/jvm=production_jvm:add(
heap-size=2048m,
max-heap-size=2048m,
max-permgen-size=512m,
stack-size=1024k,
jvm-options=["-XX:-UseParallelGC"]
)
You can also create and edit JVM settings in the JBoss EAP management console by selecting the
Runtime tab, selecting Hosts, and clicking JVM on the host you want to edit.
These settings are stored in the within the tag in host.xml.
9.2.2. Applying JVM Settings to a Server Group
When creating a server group, you can specify a JVM configuration that all servers in the group will
use. The following management CLI commands demonstrate creating a server group name groupA
that uses the production_jvm JVM settings that were shown in the previous example.
/server-group=groupA:add(profile=default, socket-bindinggroup=standard-sockets)
/server-group=groupA/jvm=production_jvm:add()
All servers in the server group will inherit JVM settings from production_jvm.
You can also override specific JVM settings at the server group level. For example, to set a different
heap size, you can use the following command:
/server-group=groupA/jvm=production_jvm:write-attribute(name=heapsize,value="1024m")
After applying the above command, the server group groupA will inherit the JVM settings from
production_jvm, except for the heap size which has an overridden value of 1024m.
You can also edit server group JVM settings in the JBoss EAP management console by selecting
the Runtime tab, selecting Server Groups, and clicking View for the server group you want to edit.
These settings for a server group are stored in domain.xml.
9.2.3. Applying JVM Settings to an Individual Server
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9.2.3. Applying JVM Settings to an Individual Server
By default, an individual JBoss EAP server instance will inherit the JVM settings of the server group
it belongs to. However, you can choose to override the inherited settings with another complete JVM
setting definition from the host controller, or choose to override specific JVM settings.
For example, the following command overrides the JVM definition of the server group in the previous
example, and sets the JVM settings for server-one to the default JVM definition:
/host=HOST_NAME/server-config=server-one/jvm=default:add()
Also, similar to server groups, you can override specific JVM settings at the server level. For
example, to set a different heap size, you can use the following command:
/host=HOST_NAME/server-config=server-one/jvm=default:writeattribute(name=heap-size,value="1024m")
You can also edit server JVM settings in the JBoss EAP management console by selecting the
Runtime tab, selecting Hosts, selecting the relevant host. Then select the relevant server, and click
View for the server you want to edit.
These settings for an individual server are stored in host.xml.
9.3. DISPLAYING THE JVM STATUS
You can view the status of JVM resources, such as heap and thread usage, for standalone or
managed domain servers from the management console. While statistics are not displayed in real
time, you can click Refresh Results to provide an up-to-date overview of JVM resources.
To display the JVM status for a standalone JBoss EAP server:
Select the Runtime tab, and then select Standalone Server. In the Monitor column, select JVM
and click View.
To display the JVM status for a JBoss EAP server in a managed domain:
Select the Runtime tab, and then select the server group and server that you want to view. In the
Monitor column, select JVM and click View.
This shows the following heap usage information:
Max
The maximum amount of memory that can be used for memory management.
Used
The amount of used memory.
Committed
The amount of memory that is committed for the Java Virtual Machine to use.
Other information, such as JVM uptime and thread usage, is also available.
9.4. SPECIFYING 32 OR 64-BIT JVM ARCHITECTURE
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In some environments, such as Hewlett-Packard HP-UX and Solaris, the -d32 or -d64 switch is
used to specify whether to run in a 32-bit or 64-bit JVM. The default is 32-bit if neither option is
indicated.
Specifying 64-Bit Architecture for a Standalone Server
1. Open EAP_HOME/bin/standalone.conf.
2. Add the following line to append the -d64 option to JAVA_OPTS.
JAVA_OPTS="$JAVA_OPTS -d64"
Specifying 64-Bit Architecture for a Managed Domain
When running a managed domain, you can specify the 64-bit environment for host and process
controllers in addition to server instances.
1. Set the host and process controllers to run in the 64-bit JVM.
a. Open EAP_HOME/bin/domain.conf.
b. Add the following line to append the -d64 option to JAVA_OPTS. Ensure that this is
inserted before where PROCESS_CONTROLLER_JAVA_OPTS and
HOST_CONTROLLER_JAVA_OPTS are set.
JAVA_OPTS="$JAVA_OPTS -d64"
Example JVM options in domain.conf
#
# Specify options to pass to the Java VM.
#
if [ "x$JAVA_OPTS" = "x" ]; then
JAVA_OPTS="-Xms64m -Xmx512m -XX:MaxPermSize=256m Djava.net.preferIPv4Stack=true"
JAVA_OPTS="$JAVA_OPTS Djboss.modules.system.pkgs=$JBOSS_MODULES_SYSTEM_PKGS Djava.awt.headless=true"
JAVA_OPTS="$JAVA_OPTS -Djboss.modules.policypermissions=true"
JAVA_OPTS="$JAVA_OPTS -d64"
else
echo "JAVA_OPTS already set in environment; overriding
default settings with values: $JAVA_OPTS"
fi
2. Set the server instances to run in the 64-bit JVM.
Add -d64 as a JVM option in your appropriate JVM configuration. The command below
shows it being added to the default JVM configuration.
/host=HOST_NAME/jvm=default:add-jvm-option(jvm-option="-d64")
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CHAPTER 10. MAIL SUBSYSTEM
10.1. CONFIGURING THE MAIL SUBSYSTEM
The mail subsystem allows you to configure mail sessions in JBoss EAP and then inject those
sessions into applications using JNDI. It also supports configuration using Java EE 7
@MailSessionDefinition and @MailSessionDefinitions annotations.
Configuring SMTP server for use in an application
1. Configure the SMTP server and the outbound socket binding using the following CLI
commands, for example:
/socket-binding-group=standard-sockets/remote-destinationoutbound-socket-binding=my-smtp:add(host=localhost, port=25)
/subsystem=mail/mail-session=mySession:add(jndiname=java:jboss/mail/MySession)
/subsystem=mail/mail-session=mySession/server=smtp:add(outboundsocket-binding-ref=my-smtp, username=user, password=pass,
tls=true)
2. Call the configured mail session within an application
@Resource(lookup="java:jboss/mail/MySession")
private Session session;
10.2. CONFIGURING CUSTOM TRANSPORTS
When using a standard mail server, such as POP3 or IMAP, the mail server has a set of attributes
that can be defined. Some of these attributes are mandatory. The most important of these is the
outbound-socket-binding-ref, which is a reference to the outbound mail socket binding and
is defined with a host address and port number.
Defining the outbound-socket-binding-ref may not be the most effective solution for users
who have their host configuration using multiple hosts for load balancing purposes. Standard
JavaMail does not support host configuration using multiple hosts for load balancing. Therefore,
users who have this configuration using multiple hosts are required to implement custom mail
transports. These custom mail transports do not require the outbound-socket-binding-ref
and allow custom host property formats.
You can configure custom mail transports from the management CLI.
1. Add a new mail session and specify the JNDI name.
/subsystem=mail/mail-session=mySession:add(jndiname=java:jboss/mail/MySession)
2. Add an outbound socket binding and specify the host and port.
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/socket-binding-group=standard-sockets/remote-destinationoutbound-socket-binding=my-smtp-binding:add(host=localhost,
port=25)
3. Add an SMTP server and specify the outbound socket binding, username, and password.
/subsystem=mail/mail-session=mySession/server=smtp:add(outboundsocket-binding-ref=my-smtp-binding, username=user, password=pass,
tls=true)
Note
You can configure a POP3 or IMAP server using similar steps.
POP3 Server
/socket-binding-group=standard-sockets/remote-destinationoutbound-socket-binding=my-pop3-binding:add(host=localhost,
port=110)
/subsystem=mail/mail-session=mySession/server=pop3:add(outboundsocket-binding-ref=my-pop3-binding, username=user,
password=pass)
IMAP Server
/socket-binding-group=standard-sockets/remote-destinationoutbound-socket-binding=my-imap-binding:add(host=localhost,
port=143)
/subsystem=mail/mail-session=mySession/server=imap:add(outboundsocket-binding-ref=my-imap-binding, username=user,
password=pass)
To use a custom server, create a custom mail server without an outbound socket binding. You can
specify the host information in the properties definition of the custom mail server. For example:
/subsystem=mail/mailsession=mySession/custom=myCustomServer:add(username=user,password=pass
, properties={"host" => "myhost", "my-property" =>"value"})
If you define a custom protocol, any property name that includes a period (.) is considered a fullyqualified name and is passed directly. Any other format, such as my-property, is translated in the
following format: mail.server-name.my-property.
The following XML is an example mail configuration that includes custom servers.
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CHAPTER 11. CONFIGURING WEB SERVICES
JBoss EAP offers the ability to configure the behavior of deployed web services through the Web
Services subsystem using the management console or the management CLI. You can configure
published endpoint addresses and handler chains. You can also enable the collection of runtime
statistics for web services.
For more information, see the Configuring Web Services Subsystem chapter of the JBoss EAP
Developing Web Services Applications guide.
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CHAPTER 12. LOGGING WITH JBOSS EAP
JBoss EAP provides highly-configurable logging facilities for both its own internal use and for use by
deployed applications. The logging subsystem is based on JBoss LogManager and supports several
third-party application logging frameworks in addition to JBoss Logging.
12.1. ABOUT SERVER LOGGING
12.1.1. Server Logging
By default, all JBoss EAP log entries are written to the server.log file. The location of this file
depends on your operating mode.
Standalone server: EAP_HOME/standalone/log/server.log
Managed domain: EAP_HOME/domain/servers/SERVER_NAME/log/server.log
This file is often referred to as the server log. For more information, see the Root Logger section.
12.1.2. Bootup Logging
During bootup, JBoss EAP logs information about the Java environment and the startup of each
service. This log can be useful when troubleshooting. By default, all log entries are written to the
server log.
Bootup logging configuration is specified in the logging.properties configuration file, which is
active until the JBoss EAP logging subsystem is started and takes over. The location of this file
depends on your operating mode.
Standalone server: EAP_HOME/standalone/configuration/logging.properties
Managed domain:
There is a logging.properties file for the domain controller and for each server.
Domain controller: EAP_HOME/domain/configuration/logging.properties
Server: EAP_HOME/domain/servers/SERVER_NAME/data/logging.properties
Warning
It is recommended that you do not directly edit the logging.properties file unless
you know of a specific use case that requires it. Before doing so, it is recommended that
you open a support case from the Red Hat Customer Portal.
Changes made manually to the logging.properties file are overwritten on startup.
12.1.2.1. View Bootup Errors
When troubleshooting JBoss EAP, checking for errors that occurred during bootup should be one of
the first steps taken. You can then use the information provided to diagnose and resolve their
causes. Open a support case for assistance in troubleshooting bootup errors.
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There are two methods of viewing bootup errors, each with its advantages. You can examine the
server.log file or read the boot errors using the read-boot-errors management CLI
command.
Examine the Server Log File
You can open the server.log file to view any errors that occurred during bootup.
This method allows you to see each error message together with possibly related messages,
allowing you to get more information about why an error might have occurred. It also allows you to
see error messages in plain text format.
1. Open the file server.log in a file viewer.
2. Navigate to the end of the file.
3. Search backward for the WFLYSRV0049 message identifier, which marks the start of the
latest bootup sequence.
4. Search the log from that point onward for instances of ERROR. Each instance will include a
description of the error and list the modules involved.
The following is an example error description from the server.log log file.
2016-03-16 14:32:01,627 ERROR [org.jboss.msc.service.fail] (MSC service
thread 1-7) MSC000001: Failed to start service
jboss.undertow.listener.default: org.jboss.msc.service.StartException
in service jboss.undertow.listener.default: Could not start http
listener
at
org.wildfly.extension.undertow.ListenerService.start(ListenerService.ja
va:142)
at
org.jboss.msc.service.ServiceControllerImpl$StartTask.startService(Serv
iceControllerImpl.java:1948)
at
org.jboss.msc.service.ServiceControllerImpl$StartTask.run(ServiceContro
llerImpl.java:1881)
at
java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.ja
va:1142)
at
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.j
ava:617)
at java.lang.Thread.run(Thread.java:745)
Caused by: java.net.BindException: Address already in use
...
Read the Boot Errors from the Management CLI
You can use the read-boot-errors management CLI command to view errors if a server starts
but reported errors during bootup.
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This method does not require access to the server’s file system, which is useful for anyone
responsible for monitoring for errors who does not have file system access. Since it is a
management CLI command, it can be used in a script. For example, you could write a script that
starts multiple JBoss EAP instances, then checks for errors that occurred on bootup.
Run the following management CLI command.
/core-service=management:read-boot-errors
Any errors that occurred during bootup will be listed.
{
"outcome" => "success",
"result" => [
{
"failed-operation" => {
"operation" => "add",
"address" => [
("subsystem" => "undertow"),
("server" => "default-server"),
("http-listener" => "default")
]
},
"failure-description" => "{\"WFLYCTL0080: Failed
services\" => {\"jboss.undertow.listener.default\" =>
\"org.jboss.msc.service.StartException in service
jboss.undertow.listener.default: Could not start http listener
Caused by: java.net.BindException: Address already in use\"}}",
"failed-services" => {"jboss.undertow.listener.default" =>
"org.jboss.msc.service.StartException in service
jboss.undertow.listener.default: Could not start http listener
Caused by: java.net.BindException: Address already in use"}
}
...
]
}
12.1.3. Garbage Collection Logging
Garbage collection logging logs all garbage collection activity to plain text log files. These log files
can be useful for diagnostic purposes. Garbage collection logging is enabled by default for a JBoss
EAP standalone server on all supported configurations except IBM Java development kit.
The default location for the garbage collection log is
EAP_HOME/standalone/log/gc.log.DIGIT.current. By default, garbage collection logs are
limited to three MB each, and up to five files are rotated.
12.1.4. Default Log File Locations
The following log files are created for the default logging configurations. The default configuration
writes the server log files using periodic log handlers.
Table 12.1. Default Log File for a Standalone Server
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Log File
Description
EAP_HOME/standalone/log/server.log
Contains all server log messages, including server
startup messages.
EAP_HOME/standalone/log/gc.log
Contains details of all garbage collection.
Table 12.2. Default Log Files for a Managed Domain
Log File
Description
EAP_HOME/domain/log/host-controller.log
Contains log messages related to the startup of the
host controller.
EAP_HOME/domain/log/process-controller.log
Contains log messages related to the startup of the
process controller.
EAP_HOME/domain/servers/SERVER_NAME/log/
server.log
Contains all log messages for the named server,
including server startup messages.
12.2. ABOUT APPLICATION LOGGING
Logging for applications can be configured using the JBoss EAP logging subsystem or on a perdeployment basis.
See About the Logging Subsystem for using JBoss EAP log categories and handlers for capturing
log messages.
For more information on application logging, such as supported application logging frameworks and
configuring per-deployment logging, see the Logging for Developers section in the JBoss EAP
Development Guide.
12.2.1. Per-deployment Logging
Per-deployment logging allows a developer to configure the logging configuration for their
application in advance. When the application is deployed, logging begins according to the defined
configuration. The log files created through this configuration contain information only about the
behavior of the application.
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Note
If the per-deployment logging configuration is not done, the configuration from logging
subsystem is used for all the applications as well as the server.
This approach has advantages and disadvantages over using system-wide logging. An advantage is
that the administrator of the JBoss EAP instance does not need to configure any other logging than
the server logging. A disadvantage is that the per-deployment logging configuration is read only on
server startup, and so cannot be changed at runtime.
For instructions on using per-deployment logging in your applications, see Add Per-deployment
Logging to an Application in the JBoss EAP Development Guide.
12.2.1.1. Disable Per-deployment Logging
You can disable per-deployment logging in one of the following ways:
Set the use-deployment-logging-config attribute to false.
The use-deployment-logging-config attribute controls whether or not your deployment is
scanned for per-deployment logging. This defaults to true by default. You can set this attribute
to false to disable per-deployment logging.
/subsystem=logging:write-attribute(name=use-deployment-loggingconfig,value=false)
Exclude the logging subsystem using a jboss-deployment-structure.xml file.
For instructions, see Exclude a Subsystem from a Deployment in the JBoss EAP Development
Guide.
12.2.2. Viewing Deployment Logging Configuration
You obtain information about the logging configuration for a particular deployment using the
following management CLI command.
/deployment=DEPLOYMENT_NAME/subsystem=logging/configuration=CONFIG:read
-resource
The logging configuration value for a deployment can be one of three values:
default, if the deployment is using the logging subsystem. This will output the logging
subsystem configuration.
profile-PROFILE_NAME, if the deployment is using a logging profile defined in the logging
subsystem. This will output the logging profile configuration.
The path to the configuration file being used, for example, myear.ear/METAINF/logging.properties.
For example, the below management CLI command displays the configuration for the MYPROFILE
logging profile, which is used by the specified deployment.
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/deployment=mydeployment.war/subsystem=logging/configuration=profileMYPROFILE:read-resource(recursive=true,include-runtime=true)
This will output the following information.
{
"outcome" => "success",
"result" => {
"error-manager" => undefined,
"filter" => undefined,
"formatter" => {
"MYFORMATTER" => {
"class-name" =>
"org.jboss.logmanager.formatters.PatternFormatter",
"module" => undefined,
"properties" => {"pattern" => "%d{HH:mm:ss,SSS} %-5p
[%c] (%t) %s%e%n"}
}
},
"handler" => {
"MYPERIODIC" => {
"class-name" =>
"org.jboss.logmanager.handlers.PeriodicRotatingFileHandler",
"encoding" => undefined,
"error-manager" => undefined,
"filter" => undefined,
"formatter" => "MYFORMATTER",
"handlers" => [],
"level" => "ALL",
"module" => undefined,
"properties" => {
"append" => "true",
"autoFlush" => "true",
"enabled" => "true",
"suffix" => ".yyyy-MM-dd",
"fileName" =>
"EAP_HOME/standalone/log/deployment.log"
}
}
},
"logger" => {"MYCATEGORY" => {
"filter" => undefined,
"handlers" => [],
"level" => "DEBUG",
"use-parent-handlers" => true
}},
"pojo" => undefined
}
}
You could also use a recursive read-resource operation to read the logging configuration and
other information about a deployment.
/deployment=DEPLOYMENT_NAME/subsystem=logging:read-resource(includeruntime=true, recursive=true)
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12.3. VIEWING LOG FILES
Viewing server and application logs is important in order to help diagnose errors, performance
problems, and other issues. Some users may prefer to view logs directly on the server file system.
For those who do not have direct access to the file system, or who prefer a graphical interface,
JBoss EAP allows you to view logs from the management console. You can also view logs using the
management CLI.
For a log to be accessible from one of the management interfaces, it must be located in the directory
specified by the server’s jboss.server.log.dir property and be defined as a file, periodic
rotating, size rotating, or periodic size rotating log handler. RBAC role assignments are also
honored, so a user logged in to the management console or CLI can only view logs that they are
authorized to access.
View Logs from the Management Console
You can view logs directly from the management console.
Select the Runtime tab.
Select Standalone Server. If you are running in a managed domain, select the appropriate
server.
Select Log Files and click View.
Once you choose a log file from the list, you can view and search the log contents directly in the
management console. You can also download a log file to your local file system.
Warning
The management console log viewer is not intended to be a text editor replacement for
viewing very large log files, for example, greater than 100MB. You will be prompted for
confirmation if you attempt to open a log file that is larger than 15MB. Opening a very
large file in the management console could crash your browser, so you should always
download large log files locally and open them in a text editor.
View Logs from the Management CLI
You can read the contents of log files from the management CLI using the read-log-file
command. By default, this displays the last 10 lines of the specified log file.
/subsystem=logging/log-file=LOG_FILE_NAME:read-log-file
Note
In a managed domain, precede this command with
/host=HOST_NAME/server=SERVER_NAME.
You can use the following parameters to customize the log output.
encoding
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The character encoding used to read the file.
lines
The number of lines to read from the file. A value of -1 will read all log lines. The default is
10.
skip
The number of lines to skip before reading. The default is 0.
tail
Whether to read from the end of the file. Defaults to true.
For example, the following management CLI command reads the first 5 lines from the top of the
server.log log file.
/subsystem=logging/log-file=server.log:read-logfile(lines=5,tail=false)
This produces the following output.
{
"outcome" => "success",
"result" => [
"2016-03-24 08:49:26,612 INFO [org.jboss.modules] (main)
JBoss Modules version 1.5.1.Final-redhat-1",
"2016-03-24 08:49:26,788 INFO [org.jboss.msc] (main) JBoss
MSC version 1.2.6.Final-redhat-1",
"2016-03-24 08:49:26,863 INFO [org.jboss.as] (MSC service
thread 1-7) WFLYSRV0049: JBoss EAP 7.0.0.GA (WildFly Core 2.0.13.Finalredhat-1) starting",
"2016-03-24 08:49:27,973 INFO [org.jboss.as.server]
(Controller Boot Thread) WFLYSRV0039: Creating http management service
using socket-binding (management-http)",
"2016-03-24 08:49:27,994 INFO [org.xnio] (MSC service thread
1-1) XNIO version 3.3.4.Final-redhat-1"
]
}
12.4. ABOUT THE LOGGING SUBSYSTEM
The JBoss EAP logging subsystem is configured using a system of log categories and log handlers.
Log categories define what messages to capture. Log handlers define how to deal with those
messages, for example, writing to a disk or sending to the console.
Logging profiles allow uniquely-named sets of logging configuration to be created and assigned to
applications independent of any other logging configuration. The configuration of logging profiles is
almost identical to the main logging subsystem.
12.4.1. Root Logger
The JBoss EAP root logger captures all log messages, of the specified log level or higher, sent to
the server that are not captured by a log category.
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By default, the root logger is configured to use a console and a periodic log handler. The periodic
log handler is configured to write to the server.log file. This file is often referred to as the server
log.
See Configuring the Root Logger for more information.
12.4.2. Log Categories
A log category defines a set of log messages to capture and one or more log handlers that will
process the messages.
The log messages to capture are defined by the specified Java package of origin and log level.
Messages from classes in that package and of that log level or higher are captured by the log
category and sent to the specified log handlers.
Note
Although the log category is typically the Java package and class name, it can be any
name specified by the Logger.getLogger(LOGGER_NAME) method.
Log categories can optionally use the log handlers of the root logger instead of their own handlers.
See Configuring Log Categories for more information.
12.4.3. Log Handlers
Log handlers define how captured log messages are recorded. The available log handler types are
console, file, periodic, size, periodic size, syslog, custom, and async.
Note
A log handler must be added to at least one logger in order to be active.
Log Handler Types
Console
A console log handler writes log messages to either the host operating system’s standard
out (stdout) or standard error (stderr) stream. These messages are displayed when
JBoss EAP is run from a command line prompt. The messages from a console log handler
are not saved unless the operating system is configured to capture the standard out or
standard error stream.
File
A file log handler writes log messages to a specified file.
Periodic
Periodic log handlers write log messages to a named file until a specified period of time has
elapsed. Once the time period has passed, the file is renamed by appending the specified
timestamp and the handler continues to write into a newly created log file with the original
name.
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Size
A size log handler writes log messages to a named file until the file reaches a specified size.
When the file reaches a specified size, it is renamed with a numeric suffix and the handler
continues to write into a newly created log file with the original name. Each size log handler
must specify the maximum number of files to be kept in this fashion.
Periodic Size
A periodic size log handler writes log messages to a named file until the file reaches the
specified size or the specified time period has passed. Then, the file is renamed and the
handler continues to write to a newly created log file with the original name.
This is a combination of the periodic and size log handlers and supports their combined
attributes.
Syslog
A syslog handler can be used to send messages to a remote logging server. This allows
multiple applications to send their log messages to the same server, where they can all be
parsed together.
Custom
A custom log handler enables to you to configure new types of log handlers that have been
implemented. A custom handler must be implemented as a Java class that extends
java.util.logging.Handler and be contained in a module. You can also use a Log4J
appender as a custom log handler.
Async
An async log handler is a wrapper log handler that provides asynchronous behavior for one
or more other log handlers. This is useful for log handlers that may have high latency or
other performance problems such as writing a log file to a network file system.
For details on configuring each of these log handlers, see the Configuring Log Handlers section.
12.4.4. Log Levels
A log level is an enumerated value that indicates the nature and severity of a log message. As a
developer, you can specify the level of a given log message using the appropriate method of your
chosen logging framework to send the message.
JBoss EAP supports all the log levels used by the supported application logging frameworks. The
most commonly used log levels from lowest to highest are TRACE, DEBUG, INFO, WARN, ERROR, and
FATAL.
Log levels are used by log categories and handlers to limit the messages they are responsible for.
Each log level has an assigned numeric value that indicates its order relative to other log levels. Log
categories and handlers are assigned a log level, and they only process log messages of that level
or higher. For example a log handler with the level of WARN will only record messages of the levels
WARN, ERROR, and FATAL.
Supported Log Levels
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Log Level
Value
Description
ALL
Integer.MIN
_VALUE
Provides all log messages.
FINEST
300
-
FINER
400
-
TRACE
400
TRACE level log messages provide detailed information about the
running state of an application and are usually only captured during
debugging.
DEBUG
500
DEBUG level log messages indicate the progress of individual requests or
application activities and are usually only captured during debugging.
FINE
500
-
CONFIG
700
-
INFO
800
INFO level log messages indicate the overall progress of the application.
Often used for application startup, shutdown, and other major lifecycle
events.
WARN
900
WARN level log messages indicate a situation that is not in error, but is
not considered ideal. WARN log messages can indicate circumstances
that could lead to errors in the future.
WARNING
900
-
ERROR
1000
ERROR level log messages indicate an error that has occurred that could
prevent the current activity or request from completing but will not
prevent the application from running.
SEVERE
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Log Level
Value
Description
FATAL
1100
FATAL level log messages indicate events that could cause critical
service failure and application shutdown and could cause JBoss EAP to
shutdown.
OFF
Integer.MAX
_VALUE
Does not display any log message.
Note
ALL is the lowest log level and includes messages of all log levels. This provides the most
amount of logging.
FATAL is the highest log level and only includes messages of that level. This provides the
least amount of logging.
12.4.5. Log Formatters
A log formatter defines the appearance of log messages from that handler. It is a string that uses a
syntax based on java.util.logging.Formatter class.
For example, the default configuration uses the following log formatter string for logging messages
to the server log: %d{yyyy-MM-dd HH:mm:ss,SSS} %-5p [%c] (%t) %s%e%n. This will create
log messages like the one shown below.
2016-03-18 15:49:32,075 INFO [org.jboss.as] (Controller Boot Thread)
WFLYSRV0051: Admin console listening on http://127.0.0.1:9990
For more information on configuring log formatters, see Configure a Named Pattern Formatter or
Configure a Custom Log Formatter.
See the table below for the syntax used in log formatter strings.
Log Formatter Syntax
Symbol
Description
%c
The category of the logging event.
%p
The level of the log entry (INFO, DEBUG, etc.).
%P
The localized level of the log entry.
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108
Symbol
Description
%d
The current date/time (yyyy-MM-dd HH:mm:ss,SSS format).
%r
The relative time (milliseconds since the log was initialized).
%z
The time zone, which must be specified before the date ( %d). For example,
%z{GMT}%d{HH:mm:ss,SSS} .
%k
A log resource key (used for localization of log messages).
%m
The log message (including exception trace).
%s
The simple log message (no exception trace).
%e
The exception stack trace (no extended module information).
%E
The exception stack trace (with extended module information).
%t
The name of the current thread.
%n
A newline character.
%C
The class of the code calling the log method (slow).
%F
The filename of the class calling the log method (slow).
%l
The source location of the code calling the log method (slow).
%L
The line number of the code calling the log method (slow).
%M
The method of the code calling the log method (slow).
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Symbol
Description
%x
The Nested Diagnostic Context.
%X
The Message Diagnostic Context.
%%
A literal percent (% ) character (escaping).
12.4.6. Filter Expressions
Filter expressions, configured using the filter-spec attribute, are used to record log messages
based on various criteria. Filter checking is always done on a raw unformatted message. You can
include a filter for a logger or handler, but the logger filter takes precedence over the filter put on a
handler.
Note
A filter-spec specified for the root logger is not inherited by other loggers. Instead a
filter-spec must be specified per handler.
Table 12.3. Filter Expressions for Logging
Filter Expression
Description
accept
Accept all log messages.
deny
Deny all log messages.
not[filter expression]
Returns the inverted value of a single filter expression. For
example:
not(match("WFLY"))
all[filter expression]
Returns concatenated value from a comma-separated list of
filter expressions. For example:
all(match("WFLY"),match("WELD"))
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Filter Expression
Description
any[filter expression]
Returns one value from a comma-separated list of filter
expressions. For example:
any(match("WFLY"),match("WELD"))
levelChange[level]
Updates the log record with the specified level. For example:
levelChange(WARN)
levels[levels]
Filters log messages with a level listed in the commaseparated list of levels. For example:
levels(DEBUG,INFO,WARN,ERROR)
levelRange[minLevel,maxLevel]
Filters log messages within the specified level range. The [
and ] characters are used to indicate an inclusive level. The
( and ) characters are used to indicate an exclusive level.
For example:
levelRange[INFO,ERROR]
The minimum level must be greater than or equal to
INFO and the maximum level must be less than or
equal to ERROR.
levelRange[DEBUG,ERROR)
The minimum level must be greater than or equal to
DEBUG and the maximum level must be less than
ERROR.
match["pattern"]
Filters log messages using the provided regular expression.
For example:
match("WFLY\d+")
substitute["pattern","replacement value"]
A filter that replaces the first match to the pattern (first
argument) with the replacement text (second argument). For
example:
substitute("WFLY","EAP")
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Filter Expression
Description
substituteAll["pattern","replacement
value"]
A filter which replaces all matches of the pattern (first
argument) with the replacement text (second argument). For
example:
substituteAll("WFLY","EAP")
Note
When configuring the filter expression using the management CLI, be sure to escape
commas and quotation marks in the filter text so that the value is correctly processed as a
string. You must precede commas and quotation marks with a backslash (\) and wrap the
entire expression in quotation marks. Below is an example that properly escapes
substituteAll("WFLY","YLFW").
/subsystem=logging/console-handler=CONSOLE:writeattribute(name=filter-spec,
value="substituteAll(\"WFLY\"\,\"YLFW\")")
12.4.7. Implicit Logging Dependencies
By default, the JBoss EAP logging subsystem adds implicit logging API dependencies to
deployments. You can control whether these implicit dependencies are added to deployments by
using the add-logging-api-dependencies attribute, which is true by default.
Using the management CLI, you can set the add-logging-api-dependencies attribute to
false so that the implicit logging API dependencies will not be added to deployments.
/subsystem=logging:write-attribute(name=add-logging-api-dependencies,
value=false)
For information on the implicit dependencies for the logging subsystem, see the Implicit Module
Dependencies section in the JBoss EAP Development Guide.
12.5. CONFIGURING LOG CATEGORIES
This section shows you how to configure log categories using the management CLI. You can also
configure log categories using the management console by navigating to the Logging subsystem
from the Configuration tab and selecting the Log Categories tab.
The main tasks you will perform to configure a log category are:
Add a new log category.
Configure the log category settings.
Assign a log handler to the log category.
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Important
If you are configuring this log category for a logging profile, the start of the command
would be /subsystem=logging/logging-profile=LOGGING_PROFILE_NAME/
instead of /subsystem=logging/.
Additionally, if you are running in a managed domain, precede the commands with
/profile=PROFILE_NAME.
Add a Log Category
The log category name is defined by the Java package of origin. Messages from classes in that
package will be captured as long as they adhere to the other settings, for example, the log level.
/subsystem=logging/logger=LOG_CATEGORY:add
Configure Log Category Settings
Depending on your needs, you may need to set one or more of the following log category attributes.
For a full list of available log category attributes and their descriptions, see Log Category Attributes.
Set the log level.
Set the appropriate log level for the log category. The default is ALL. See Log Levels for all
available options.
/subsystem=logging/logger=LOG_CATEGORY:writeattribute(name=level,value=LEVEL)
Set whether this category should use the log handlers of the root logger.
By default, log categories will use the handlers of the root logger in addition to its own. Set the
use-parent-handlers attribute to false if it the log category should use only its assigned
handlers.
/subsystem=logging/logger=LOG_CATEGORY:write-attribute(name=useparent-handlers,value=USE_PARENT_HANDLERS)
Set the filter expression.
Set the expression for filtering log messages for the log category. Be sure to escape any
commas and quotation marks and surround with quotation marks. For example, the
FILTER_EXPRESSION replaceable variable below would need to be replaced with
"not(match(\"WFLY\"))" for a filter expression of not(match("WFLY")).
/subsystem=logging/logger=LOG_CATEGORY:write-attribute(name=filterspec, value=FILTER_EXPRESSION)
See the Filter Expressions section for more information on available filter expressions.
Assign a Handler
Assign a log handler to the log category.
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/subsystem=logging/logger=LOG_CATEGORY:addhandler(name=LOG_HANDLER_NAME)
Remove a Log Category
A log category can be removed with the remove operation.
/subsystem=logging/logger=LOG_CATEGORY:remove
12.6. CONFIGURING LOG HANDLERS
Log handlers define how captured log messages are recorded. See the appropriate section for
configuring the type of log handler that you need.
Console log handler
File log handler
Periodic rotating log handler
Size rotating log handler
Periodic size rotating log handler
Syslog handler
Custom log handler
Async log handler
12.6.1. Configure a Console Log Handler
This section shows you how to configure a console log handler using the management CLI. You can
also configure console log handlers using the management console by navigating to the Logging
subsystem from the Configuration tab, selecting the Handler tab, and selecting Console from the
left-hand menu.
The main tasks you will perform to configure a console log handler are:
Add a new console log handler.
Configure the console log handler settings.
Assign the console log handler to a logger.
Important
If you are configuring this log handler for a logging profile, the start of the command would
be /subsystem=logging/logging-profile=LOGGING_PROFILE_NAME/ instead of
/subsystem=logging/.
Additionally, if you are running in a managed domain, precede the commands with
/profile=PROFILE_NAME.
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Add a Console Log Handler
/subsystem=logging/console-handler=CONSOLE_HANDLER_NAME:add
Configure Console Log Handler Settings
Depending on your needs, you may need to set one or more of the following console log handler
attributes. For a full list of available console log handler attributes and their descriptions, see
Console Log Handler Attributes.
Set the log level.
Set the appropriate log level for the handler. The default is ALL. See Log Levels for all available
options.
/subsystem=logging/console-handler=CONSOLE_HANDLER_NAME:writeattribute(name=level,value=LEVEL)
Set the target.
Set the target for the handler, which can be one of System.out, System.err, or console.
The default is System.out.
/subsystem=logging/console-handler=CONSOLE_HANDLER_NAME:writeattribute(name=target,value=TARGET)
Set the encoding.
Set the encoding for the handler, for example, utf-8.
/subsystem=logging/console-handler=CONSOLE_HANDLER_NAME:writeattribute(name=encoding,value=ENCODING)
Set the log formatter.
Set the formatter string for the handler. For example, the default format string is
%d{HH:mm:ss,SSS} %-5p [%c] (%t) %s%e%n. Be sure to enclose the FORMAT value in
quotation marks.
/subsystem=logging/console-handler=CONSOLE_HANDLER_NAME:writeattribute(name=formatter,value=FORMAT)
Note
Use the named-formatter attribute if you want to reference a saved formatter.
Set auto flush.
Set whether to automatically flush after each write. The default value is true.
/subsystem=logging/console-handler=CONSOLE_HANDLER_NAME:writeattribute(name=autoflush,value=AUTO_FLUSH)
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Set the filter expression.
Set the expression for filtering log messages for the handler. Be sure to escape any commas and
quotation marks and surround with quotation marks. For example, the FILTER_EXPRESSION
replaceable variable below would need to be replaced with "not(match(\"WFLY\"))" for a
filter expression of not(match("WFLY")).
/subsystem=logging/console-handler=CONSOLE_HANDLER_NAME:writeattribute(name=filter-spec, value=FILTER_EXPRESSION)
See the Filter Expressions section for more information on available filter expressions.
Assign the Console Log Handler to a Logger
In order for a log handler to be active, you must assign it to a logger.
The following management CLI command assigns the console log handler to the root logger.
/subsystem=logging/root-logger=ROOT:addhandler(name=CONSOLE_HANDLER_NAME)
The following management CLI command assigns the console log handler to a logger whose name
is specified by CATEGORY.
/subsystem=logging/logger=CATEGORY:addhandler(name=CONSOLE_HANDLER_NAME)
Remove a Console Log Handler
A log handler can be removed with the remove operation. A log handler cannot be removed if it is
currently assigned to a logger or async log handler.
/subsystem=logging/console-handler=CONSOLE_HANDLER_NAME:remove
12.6.2. Configure a File Log Handler
This section shows you how to configure a file log handler using the management CLI. You can also
configure file log handlers using the management console by navigating to the Logging subsystem
from the Configuration tab, selecting the Handler tab, and selecting File from the left-hand menu.
The main tasks you will perform to configure a file log handler are:
Add a new file log handler.
Configure the file log handler settings.
Assign the file log handler to a logger.
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Important
If you are configuring this log handler for a logging profile, the start of the command would
be /subsystem=logging/logging-profile=LOGGING_PROFILE_NAME/ instead of
/subsystem=logging/.
Additionally, if you are running in a managed domain, precede the commands with
/profile=PROFILE_NAME.
Add a File Log Handler
When adding a file log handler, you must specify the file path using the file attribute, which is
comprised of the path and relative-to attributes. Use the path attribute to set the file path for
the log, including the name, for example my-log.log. Optionally, use the relative-to attribute
to set that the path is relative to a named path, for example jboss.server.log.dir.
/subsystem=logging/file-handler=FILE_HANDLER_NAME:add(file=
{path=FILE_PATH,relative-to=RELATIVE_TO_PATH})
Configure File Log Handler Settings
Depending on your needs, you may need to set one or more of the following file log handler
attributes. For a full list of available file log handler attributes and their descriptions, see File Log
Handler Attributes.
Set the log level.
Set the appropriate log level for the handler. The default is ALL. See Log Levels for all available
options.
/subsystem=logging/file-handler=FILE_HANDLER_NAME:writeattribute(name=level,value=LEVEL)
Set the append behavior.
By default, JBoss EAP will append log messages to the same file when the server is restarted.
You can set the append attribute to false to have the file overwritten upon server restart.
/subsystem=logging/file-handler=FILE_HANDLER_NAME:writeattribute(name=append,value=APPEND)
Set the encoding.
Set the encoding for the handler, for example, utf-8.
/subsystem=logging/file-handler=FILE_HANDLER_NAME:writeattribute(name=encoding,value=ENCODING)
Set the log formatter.
Set the formatter string for the handler. For example, the default format string is
%d{HH:mm:ss,SSS} %-5p [%c] (%t) %s%e%n. Be sure to enclose the FORMAT value in
quotation marks.
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/subsystem=logging/file-handler=FILE_HANDLER_NAME:writeattribute(name=formatter,value=FORMAT)
Note
Use the named-formatter attribute if you want to reference a saved formatter.
Set auto flush.
Set whether to automatically flush after each write. The default value is true.
/subsystem=logging/file-handler=FILE_HANDLER_NAME:writeattribute(name=autoflush,value=AUTO_FLUSH)
Set the filter expression.
Set the expression for filtering log messages for the handler. Be sure to escape any commas and
quotation marks and surround with quotation marks. For example, the FILTER_EXPRESSION
replaceable variable below would need to be replaced with "not(match(\"WFLY\"))" for a
filter expression of not(match("WFLY")).
/subsystem=logging/file-handler=FILE_HANDLER_NAME:writeattribute(name=filter-spec, value=FILTER_EXPRESSION)
See the Filter Expressions section for more information on available filter expressions.
Assign the File Log Handler to a Logger
In order for a log handler to be active, you must assign it to a logger.
The following management CLI command assigns the file log handler to the root logger.
/subsystem=logging/root-logger=ROOT:add-handler(name=FILE_HANDLER_NAME)
The following management CLI command assigns the file log handler to a logger whose name is
specified by CATEGORY.
/subsystem=logging/logger=CATEGORY:add-handler(name=FILE_HANDLER_NAME)
Remove a File Log Handler
A log handler can be removed with the remove operation. A log handler cannot be removed if it is
currently assigned to a logger or async log handler.
/subsystem=logging/file-handler=FILE_HANDLER_NAME:remove
12.6.3. Configure a Periodic Rotating Log Handler
This section shows you how to configure a periodic rotating log handler using the management CLI.
You can also configure periodic log handlers using the management console by navigating to the
Logging subsystem from the Configuration tab, selecting the Handler tab, and selecting Periodic
from the left-hand menu.
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The main tasks you will perform to configure a periodic log handler are:
Add a new periodic log handler.
Configure the periodic log handler settings.
Assign the periodic log handler to a logger.
Important
If you are configuring this log handler for a logging profile, the start of the command would
be /subsystem=logging/logging-profile=LOGGING_PROFILE_NAME/ instead of
/subsystem=logging/.
Additionally, if you are running in a managed domain, precede the commands with
/profile=PROFILE_NAME.
Add a Periodic Log Handler
When adding a periodic log handler, you must specify the file path using the file attribute, which is
comprised of the path and relative-to attributes. Use the path attribute to set the file path for
the log, including the name, for example my-log.log. Optionally, use the relative-to attribute
to set that the path is relative to a named path, for example jboss.server.log.dir.
You must also set the suffix for rotated logs using the suffix attribute. This must be in a format
that can be understood by java.text.SimpleDateFormat, for example .yyyy-MM-dd-HH. The
period of the rotation is automatically calculated based on this suffix.
/subsystem=logging/periodic-rotating-filehandler=PERIODIC_HANDLER_NAME:add(file={path=FILE_PATH,relativeto=RELATIVE_TO_PATH},suffix=SUFFIX)
Configure Periodic Log Handler Settings
Depending on your needs, you may need to set one or more of the following periodic log handler
attributes. For a full list of available periodic log handler attributes and their descriptions, see
Periodic Log Handler Attributes.
Set the log level.
Set the appropriate log level for the handler. The default is ALL. See Log Levels for all available
options.
/subsystem=logging/periodic-rotating-filehandler=PERIODIC_HANDLER_NAME:writeattribute(name=level,value=LEVEL)
Set the append behavior.
By default, JBoss EAP will append log messages to the same file when the server is restarted.
You can set the append attribute to false to have the file overwritten upon server restart.
/subsystem=logging/periodic-rotating-filehandler=PERIODIC_HANDLER_NAME:writeattribute(name=append,value=APPEND)
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Set the encoding.
Set the encoding for the handler, for example, utf-8.
/subsystem=logging/periodic-rotating-filehandler=PERIODIC_HANDLER_NAME:writeattribute(name=encoding,value=ENCODING)
Set the log formatter.
Set the formatter string for the handler. For example, the default format string is
%d{HH:mm:ss,SSS} %-5p [%c] (%t) %s%e%n. Be sure to enclose the FORMAT value in
quotation marks.
/subsystem=logging/periodic-rotating-filehandler=PERIODIC_HANDLER_NAME:writeattribute(name=formatter,value=FORMAT)
Note
Use the named-formatter attribute if you want to reference a saved formatter.
Set auto flush.
Set whether to automatically flush after each write. The default value is true.
/subsystem=logging/periodic-rotating-filehandler=PERIODIC_HANDLER_NAME:writeattribute(name=autoflush,value=AUTO_FLUSH)
Set the filter expression.
Set the expression for filtering log messages for the handler. Be sure to escape any commas and
quotation marks and surround with quotation marks. For example, the FILTER_EXPRESSION
replaceable variable below would need to be replaced with "not(match(\"WFLY\"))" for a
filter expression of not(match("WFLY")).
/subsystem=logging/periodic-rotating-filehandler=PERIODIC_HANDLER_NAME:write-attribute(name=filter-spec,
value=FILTER_EXPRESSION)
See the Filter Expressions section for more information on available filter expressions.
Assign the Periodic Log Handler to a Logger
In order for a log handler to be active, you must assign it to a logger.
The following management CLI command assigns the periodic log handler to the root logger.
/subsystem=logging/root-logger=ROOT:addhandler(name=PERIODIC_HANDLER_NAME)
The following management CLI command assigns the periodic log handler to a logger whose name
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is specified by CATEGORY.
/subsystem=logging/logger=CATEGORY:addhandler(name=PERIODIC_HANDLER_NAME)
Remove a Periodic Log Handler
A log handler can be removed with the remove operation. A log handler cannot be removed if it is
currently assigned to a logger or async log handler.
/subsystem=logging/periodic-rotating-filehandler=PERIODIC_HANDLER_NAME:remove
12.6.4. Configure a Size Rotating Log Handler
This section shows you how to configure a size rotating log handler using the management CLI. You
can also configure size log handlers using the management console by navigating to the Logging
subsystem from the Configuration tab, selecting the Handler tab, and selecting Size from the lefthand menu.
The main tasks you will perform to configure a size log handler are:
Add a new size log handler .
Configure the size log handler settings .
Assign the size log handler to a logger.
Important
If you are configuring this log handler for a logging profile, the start of the command would
be /subsystem=logging/logging-profile=LOGGING_PROFILE_NAME/ instead of
/subsystem=logging/.
Additionally, if you are running in a managed domain, precede the commands with
/profile=PROFILE_NAME.
Add a Size Log Handler
When adding a size log handler, you must specify the file path using the file attribute, which is
comprised of the path and relative-to attributes. Use the path attribute to set the file path for
the log, including the name, for example my-log.log. Optionally, use the relative-to attribute
to set that the path is relative to a named path, for example jboss.server.log.dir.
/subsystem=logging/size-rotating-filehandler=SIZE_HANDLER_NAME:add(file={path=FILE_PATH,relativeto=RELATIVE_TO_PATH})
Configure Size Log Handler Settings
Depending on your needs, you may need to set one or more of the following size log handler
attributes. For a full list of available size log handler attributes and their descriptions, see Size Log
Handler Attributes.
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Set the log level.
Set the appropriate log level for the handler. The default is ALL. See Log Levels for all available
options.
/subsystem=logging/size-rotating-filehandler=SIZE_HANDLER_NAME:write-attribute(name=level,value=LEVEL)
Set the suffix for rotated logs.
Set the suffix string, which is in a format which can be understood by
java.text.SimpleDateFormat, for example .yyyy-MM-dd-HH . The period of the rotation
is automatically calculated based on this suffix.
/subsystem=logging/size-rotating-filehandler=SIZE_HANDLER_NAME:write-attribute(name=suffix, value=SUFFIX)
Set the rotation size.
Set the maximum size that the file can reach before being rotated. The default is 2m for 2
megabytes.
/subsystem=logging/size-rotating-filehandler=SIZE_HANDLER_NAME:write-attribute(name=rotate-size,
value=ROTATE_SIZE)
Set the maximum number of backup logs to keep.
Set the number of backups to keep. The default is 1.
/subsystem=logging/size-rotating-filehandler=SIZE_HANDLER_NAME:write-attribute(name=max-backup-index,
value=MAX_BACKUPS)
Set whether to rotate the log on boot.
By default, a new log file is not created on server restart. You can set this to true to rotate the
log on server restart.
/subsystem=logging/size-rotating-filehandler=SIZE_HANDLER_NAME:write-attribute(name=rotate-on-boot,
value=ROTATE_ON_BOOT)
Set the append behavior.
By default, JBoss EAP will append log messages to the same file when the server is restarted.
You can set the append attribute to false to have the file overwritten upon server restart.
/subsystem=logging/size-rotating-filehandler=SIZE_HANDLER_NAME:write-attribute(name=append,value=APPEND)
Set the encoding.
Set the encoding for the handler, for example, utf-8.
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/subsystem=logging/size-rotating-filehandler=SIZE_HANDLER_NAME:writeattribute(name=encoding,value=ENCODING)
Set the log formatter.
Set the formatter string for the handler. For example, the default format string is
%d{HH:mm:ss,SSS} %-5p [%c] (%t) %s%e%n. Be sure to enclose the FORMAT value in
quotation marks.
/subsystem=logging/size-rotating-filehandler=SIZE_HANDLER_NAME:writeattribute(name=formatter,value=FORMAT)
Note
Use the named-formatter attribute if you want to reference a saved formatter.
Set auto flush.
Set whether to automatically flush after each write. The default value is true.
/subsystem=logging/size-rotating-filehandler=SIZE_HANDLER_NAME:writeattribute(name=autoflush,value=AUTO_FLUSH)
Set the filter expression.
Set the expression for filtering log messages for the handler. Be sure to escape any commas and
quotation marks and surround with quotation marks. For example, the FILTER_EXPRESSION
replaceable variable below would need to be replaced with "not(match(\"WFLY\"))" for a
filter expression of not(match("WFLY")).
/subsystem=logging/size-rotating-filehandler=SIZE_HANDLER_NAME:write-attribute(name=filter-spec,
value=FILTER_EXPRESSION)
See the Filter Expressions section for more information on available filter expressions.
Assign the Size Log Handler to a Logger
In order for a log handler to be active, you must assign it to a logger.
The following management CLI command assigns the size log handler to the root logger.
/subsystem=logging/root-logger=ROOT:add-handler(name=SIZE_HANDLER_NAME)
The following management CLI command assigns the size log handler to a logger whose name is
specified by CATEGORY.
/subsystem=logging/logger=CATEGORY:add-handler(name=SIZE_HANDLER_NAME)
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Remove a Size Log Handler
A log handler can be removed with the remove operation. A log handler cannot be removed if it is
currently assigned to a logger or async log handler.
/subsystem=logging/size-rotating-file-handler=SIZE_HANDLER_NAME:remove
12.6.5. Configure a Periodic Size Rotating Log Handler
This section shows you how to configure a periodic size rotating log handler using the management
CLI. You can also configure periodic size log handlers using the management console by navigating
to the Logging subsystem, selecting the Handler tab, and selecting Periodic Size from the left-hand
menu.
The main tasks you will perform to configure a periodic size log handler are:
Add a new periodic size log handler.
Configure the periodic size log handler settings.
Assign the periodic size log handler to a logger.
Important
If you are configuring this log handler for a logging profile, the start of the command would
be /subsystem=logging/logging-profile=LOGGING_PROFILE_NAME/ instead of
/subsystem=logging/.
Additionally, if you are running in a managed domain, precede the commands with
/profile=PROFILE_NAME.
Add a Periodic Size Log Handler
When adding a periodic size log handler, you must specify the file path using the file attribute,
which is comprised of the path and relative-to attributes. Use the path attribute to set the file
path for the log, including the name, for example my-log.log. Optionally, use the relative-to
attribute to set that the path is relative to a named path, for example jboss.server.log.dir.
You must also set the suffix for rotated logs using the suffix attribute. This must be in a format
that can be understood by java.text.SimpleDateFormat, for example .yyyy-MM-dd-HH. The
period of the rotation is automatically calculated based on this suffix.
/subsystem=logging/periodic-size-rotating-filehandler=PERIODIC_SIZE_HANDLER_NAME:add(file={path=FILE_PATH,relativeto=RELATIVE_TO_PATH},suffix=SUFFIX)
Configure Periodic Size Log Handler Settings
Depending on your needs, you may need to set one or more of the following periodic size log
handler attributes. For a full list of available periodic size log handler attributes and their
descriptions, see Periodic Size Log Handler Attributes.
Set the log level.
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Set the appropriate log level for the handler. The default is ALL. See Log Levels for all available
options.
/subsystem=logging/periodic-size-rotating-filehandler=PERIODIC_SIZE_HANDLER_NAME:writeattribute(name=level,value=LEVEL)
Set the rotation size.
Set the maximum size that the file can reach before being rotated. The default is 2m for 2
megabytes.
/subsystem=logging/periodic-size-rotating-filehandler=PERIODIC_SIZE_HANDLER_NAME:write-attribute(name=rotate-size,
value=ROTATE_SIZE)
Set the maximum number of backup logs to keep.
Set the number of backups to keep. The default is 1.
/subsystem=logging/periodic-size-rotating-filehandler=PERIODIC_SIZE_HANDLER_NAME:write-attribute(name=max-backupindex, value=MAX_BACKUPS)
Set whether to rotate the log on boot.
By default, a new log file is not created on server restart. You can set this to true to rotate the
log on server restart.
/subsystem=logging/periodic-size-rotating-filehandler=PERIODIC_SIZE_HANDLER_NAME:write-attribute(name=rotate-onboot, value=ROTATE_ON_BOOT)
Set the append behavior.
By default, JBoss EAP will append log messages to the same file when the server is restarted.
You can set the append attribute to false to have the file overwritten upon server restart.
/subsystem=logging/periodic-size-rotating-filehandler=PERIODIC_SIZE_HANDLER_NAME:writeattribute(name=append,value=APPEND)
Set the encoding.
Set the encoding for the handler, for example, utf-8.
/subsystem=logging/periodic-size-rotating-filehandler=PERIODIC_SIZE_HANDLER_NAME:writeattribute(name=encoding,value=ENCODING)
Set the log formatter.
Set the formatter string for the handler. For example, the default format string is
%d{HH:mm:ss,SSS} %-5p [%c] (%t) %s%e%n. Be sure to enclose the FORMAT value in
quotation marks.
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/subsystem=logging/periodic-size-rotating-filehandler=PERIODIC_SIZE_HANDLER_NAME:writeattribute(name=formatter,value=FORMAT)
Note
Use the named-formatter attribute if you want to reference a saved formatter.
Set auto flush.
Set whether to automatically flush after each write. The default value is true.
/subsystem=logging/periodic-size-rotating-filehandler=PERIODIC_SIZE_HANDLER_NAME:writeattribute(name=autoflush,value=AUTO_FLUSH)
Set the filter expression.
Set the expression for filtering log messages for the handler. Be sure to escape any commas and
quotation marks and surround with quotation marks. For example, the FILTER_EXPRESSION
replaceable variable below would need to be replaced with "not(match(\"WFLY\"))" for a
filter expression of not(match("WFLY")).
/subsystem=logging/periodic-size-rotating-filehandler=PERIODIC_SIZE_HANDLER_NAME:write-attribute(name=filter-spec,
value=FILTER_EXPRESSION)
See the Filter Expressions section for more information on available filter expressions.
Assign the Periodic Size Log Handler to a Logger
In order for a log handler to be active, you must assign it to a logger.
The following management CLI command assigns the periodic size log handler to the root logger.
/subsystem=logging/root-logger=ROOT:addhandler(name=PERIODIC_SIZE_HANDLER_NAME)
The following management CLI command assigns the periodic size log handler to a logger whose
name is specified by CATEGORY.
/subsystem=logging/logger=CATEGORY:addhandler(name=PERIODIC_SIZE_HANDLER_NAME)
Remove a Periodic Size Log Handler
A log handler can be removed with the remove operation. A log handler cannot be removed if it is
currently assigned to a logger or async log handler.
/subsystem=logging/periodic-size-rotating-filehandler=PERIODIC_SIZE_HANDLER_NAME:remove
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12.6.6. Configure a Syslog Handler
This section shows you how to configure a syslog handler using the management CLI, which can be
used to send messages to a remote logging server that supports the Syslog protocol (RFC-3164 or
RFC-5424). You can also configure syslog handlers using the management console by navigating to
the Logging subsystem from the Configuration tab, selecting the Handler tab, and selecting
Syslog from the left-hand menu.
The main tasks you will perform to configure a syslog handler are:
Add a new syslog handler.
Configure the syslog handler settings.
Assign the syslog handler to a logger.
Important
If you are configuring this log handler for a logging profile, the start of the command would
be /subsystem=logging/logging-profile=LOGGING_PROFILE_NAME/ instead of
/subsystem=logging/.
Additionally, if you are running in a managed domain, precede the commands with
/profile=PROFILE_NAME.
Add a Syslog Handler
/subsystem=logging/syslog-handler=SYSLOG_HANDLER_NAME:add
Configure Syslog Handler Settings
Depending on your needs, you may need to set one or more of the following syslog handler
attributes. For a full list of available syslog handler attributes and their descriptions, see Syslog
Handler Attributes.
Set the log level.
Set the appropriate log level for the handler. The default is ALL. See Log Levels for all available
options.
/subsystem=logging/syslog-handler=SYSLOG_HANDLER_NAME:writeattribute(name=level,value=LEVEL)
Set the application name.
Set the name of the application that is logging. By default, the default name is java.
/subsystem=logging/syslog-handler=SYSLOG_HANDLER_NAME:writeattribute(name=app-name,value=APP_NAME)
Set the address of the syslog server.
/subsystem=logging/syslog-handler=SYSLOG_HANDLER_NAME:writeattribute(name=server-address,value=SERVER_ADDRESS)
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Set the port of the syslog server.
/subsystem=logging/syslog-handler=SYSLOG_HANDLER_NAME:writeattribute(name=port,value=PORT)
Set the syslog format.
Set the RFC specification to format the message. By default, this is RFC5424.
/subsystem=logging/syslog-handler=SYSLOG_HANDLER_NAME:writeattribute(name=syslog-format,value=SYSLOG_FORMAT)
Assign the Syslog Handler to a Logger
In order for a log handler to be active, you must assign it to a logger.
The following management CLI command assigns the syslog handler to the root logger.
/subsystem=logging/root-logger=ROOT:addhandler(name=SYSLOG_HANDLER_NAME)
The following management CLI command assigns the syslog handler to a logger whose name is
specified by CATEGORY.
/subsystem=logging/logger=CATEGORY:addhandler(name=SYSLOG_HANDLER_NAME)
Remove a Syslog Handler
A log handler can be removed with the remove operation. A log handler cannot be removed if it is
currently assigned to a logger or async log handler.
/subsystem=logging/syslog-handler=SYSLOG_HANDLER_NAME:remove
12.6.7. Configure a Custom Log Handler
This section shows you how to configure a custom log handler using the management CLI. You can
also configure custom log handlers using the management console by navigating to the Logging
subsystem from the Configuration tab, selecting the Handler tab, and selecting Custom from the
left-hand menu.
The main tasks you will perform to configure a custom log handler are:
Add a new custom log handler.
Configure the custom log handler settings.
Assign the custom log handler to a logger.
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Important
If you are configuring this log handler for a logging profile, the start of the command would
be /subsystem=logging/logging-profile=LOGGING_PROFILE_NAME/ instead of
/subsystem=logging/.
Additionally, if you are running in a managed domain, precede the commands with
/profile=PROFILE_NAME.
Add a Custom Log Handler
When adding a custom log handler, you must specify the Java class of the handler and the JBoss
EAP module in which it is contained. The class must extend java.util.logging.Handler.
Note
You must have already created a module containing the custom logger or this command
will fail.
/subsystem=logging/customhandler=CUSTOM_HANDLER_NAME:add(class=CLASS_NAME,module=MODULE_NAME)
Configure Custom Log Handler Settings
Depending on your needs, you may need to set one or more of the following custom log handler
attributes. For a full list of available custom log handler attributes and their descriptions, see Custom
Log Handler Attributes.
Set the log level.
Set the appropriate log level for the handler. The default is ALL. See Log Levels for all available
options.
/subsystem=logging/custom-handler=CUSTOM_HANDLER_NAME:writeattribute(name=level,value=LEVEL)
Set the properties.
Set the necessary properties for the log handler. The properties must be accessible using a
setter method.
/subsystem=logging/custom-handler=CUSTOM_HANDLER_NAME:writeattribute(name=properties.PROPERTY_NAME,value=PROPERTY_VALUE)
Set the encoding.
Set the encoding for the handler, for example, utf-8.
/subsystem=logging/custom-handler=CUSTOM_HANDLER_NAME:writeattribute(name=encoding,value=ENCODING)
Set the log formatter.
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Set the formatter string for the handler. For example, the default format string is
%d{HH:mm:ss,SSS} %-5p [%c] (%t) %s%e%n. Be sure to enclose the FORMAT value in
quotation marks.
/subsystem=logging/custom-handler=CUSTOM_HANDLER_NAME:writeattribute(name=formatter,value=FORMAT)
Note
Use the named-formatter attribute if you want to reference a saved formatter.
Set the filter expression.
Set the expression for filtering log messages for the handler. Be sure to escape any commas and
quotation marks and surround with quotation marks. For example, the FILTER_EXPRESSION
replaceable variable below would need to be replaced with "not(match(\"WFLY\"))" for a
filter expression of not(match("WFLY")).
/subsystem=logging/custom-handler=CUSTOM_HANDLER_NAME:writeattribute(name=filter-spec, value=FILTER_EXPRESSION)
See the Filter Expressions section for more information on available filter expressions.
Assign the Custom Log Handler to a Logger
In order for a log handler to be active, you must assign it to a logger.
The following management CLI command assigns the custom log handler to the root logger.
/subsystem=logging/root-logger=ROOT:addhandler(name=CUSTOM_HANDLER_NAME)
The following management CLI command assigns the custom log handler to a logger whose name
is specified by CATEGORY.
/subsystem=logging/logger=CATEGORY:addhandler(name=CUSTOM_HANDLER_NAME)
Remove a Custom Log Handler
A log handler can be removed with the remove operation. A log handler cannot be removed if it is
currently assigned to a logger or async log handler.
/subsystem=logging/custom-handler=CUSTOM_HANDLER_NAME:remove
12.6.8. Configure an Async Log Handler
This section shows you how to configure an async log handler using the management CLI. You can
also configure async log handlers using the management console by navigating to the Logging
subsystem from the Configuration tab, selecting the Handler tab, and selecting Async from the
left-hand menu.
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The main tasks you will perform to configure an async log handler are:
Add a new async log handler.
Add sub-handlers to the async log handler.
Configure the async log handler settings.
Assign the async log handler to a logger.
Important
If you are configuring this log handler for a logging profile, the start of the command would
be /subsystem=logging/logging-profile=LOGGING_PROFILE_NAME/ instead of
/subsystem=logging/.
Additionally, if you are running in a managed domain, precede the commands with
/profile=PROFILE_NAME.
Add an Async Log Handler
When adding an async log handler, you must specify the queue length. This is the maximum
number of log requests that can be held in queue.
/subsystem=logging/async-handler=ASYNC_HANDLER_NAME:add(queuelength=QUEUE_LENGTH)
Add a Sub-handler
You can add one or more handlers as sub-handlers for this async log handler. Note that the
handlers must already exist in the configuration or this command will fail.
/subsystem=logging/async-handler=ASYNC_HANDLER_NAME:addhandler(name=HANDLER_NAME)
Configure Async Log Handler Settings
Depending on your needs, you may need to set one or more of the following async log handler
attributes. For a full list of available async log handler attributes and their descriptions, see Async
Log Handler Attributes.
Set the log level.
Set the appropriate log level for the handler. The default is ALL. See Log Levels for all available
options.
/subsystem=logging/async-handler=ASYNC_HANDLER_NAME:writeattribute(name=level,value=LEVEL)
Set the overflow action.
Set the action to take when overflowing. The default value is BLOCK, which means that threads
will block in the event of a full queue. You can change this value to DISCARD, which means that
log messages will be discarded in the event of a full queue.
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/subsystem=logging/async-handler=ASYNC_HANDLER_NAME:writeattribute(name=overflow-action,value=OVERFLOW_ACTION)
Set the filter expression.
Set the expression for filtering log messages for the handler. Be sure to escape any commas and
quotation marks and surround with quotation marks. For example, the FILTER_EXPRESSION
replaceable variable below would need to be replaced with "not(match(\"WFLY\"))" for a
filter expression of not(match("WFLY")).
/subsystem=logging/async-handler=ASYNC_HANDLER_NAME:writeattribute(name=filter-spec, value=FILTER_EXPRESSION)
See the Filter Expressions section for more information on available filter expressions.
Assign the Async Log Handler to a Logger
In order for a log handler to be active, you must assign it to a logger.
The following management CLI command assigns the async log handler to the root logger.
/subsystem=logging/root-logger=ROOT:addhandler(name=ASYNC_HANDLER_NAME)
The following management CLI command assigns the async log handler to a logger whose name is
specified by CATEGORY.
/subsystem=logging/logger=CATEGORY:add-handler(name=ASYNC_HANDLER_NAME)
Remove an Async Log Handler
A log handler can be removed with the remove operation. A log handler cannot be removed if it is
currently assigned to a logger.
/subsystem=logging/async-handler=ASYNC_HANDLER_NAME:remove
12.7. CONFIGURING THE ROOT LOGGER
The root logger captures all log messages, of the specified log level or higher, sent to the server that
are not captured by a log category.
This section shows you how to configure the root logger using the management CLI. You can also
configure the root logger using the management console by navigating to the Logging subsystem
from the Configuration tab and selecting the Root Logger tab.
Configure the Root Logger
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Important
If you are configuring this log handler for a logging profile, the start of the command would
be /subsystem=logging/logging-profile=LOGGING_PROFILE_NAME/ instead of
/subsystem=logging/.
Additionally, if you are running in a managed domain, precede the commands with
/profile=PROFILE_NAME.
1. Assign log handlers to the root logger.
Add a log handler.
/subsystem=logging/root-logger=ROOT:addhandler(name=LOG_HANDLER_NAME)
Remove a log handler.
/subsystem=logging/root-logger=ROOT:removehandler(name=LOG_HANDLER_NAME)
2. Set the log level.
/subsystem=logging/root-logger=ROOT:writeattribute(name=level,value=LEVEL)
For a full list of available root logger attributes and their descriptions, see Root Logger Attributes.
12.8. CONFIGURING LOG FORMATTERS
A log formatter defines the appearance of log messages from that handler. You can configure a
named pattern formatter or a custom log formatter.
12.8.1. Configure a Named Pattern Formatter
You can create a named pattern formatter that can be used across log handlers to format log
messages.
This section shows you how to configure a log formatter using the management CLI. You can also
configure log formatters using the management console by navigating to the Logging subsystem
from the Configuration tab, selecting the Formatter tab, and selecting Pattern from the left-hand
menu.
Important
If you are configuring this log formatter for a logging profile, the start of the command
would be /subsystem=logging/logging-profile=LOGGING_PROFILE_NAME/
instead of /subsystem=logging/.
Additionally, if you are running in a managed domain, precede the commands with
/profile=PROFILE_NAME.
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Create a Named Formatter
When defining a formatter, you provide a pattern string to use to format log messages. See log
formatters for more information on the pattern syntax.
/subsystem=logging/patternformatter=PATTERN_FORMATTER_NAME:add(pattern=PATTERN_STRING)
You can also define a color map to assign a color to different log levels. The format is a commaseparated list of LEVEL:COLOR.
Valid levels: finest, finer, fine, config, trace, debug, info, warning, warn, error,
fatal, severe
Valid colors: black, green, red, yellow, blue, magenta, cyan, white, brightblack,
brightred, brightgreen, brightblue, brightyellow, brightmagenta, brightcyan,
brightwhite
/subsystem=logging/pattern-formatter=PATTERN_FORMATTER_NAME:writeattribute(name=color-map,value="LEVEL:COLOR,LEVEL:COLOR")
Assign a Named Formatter to a Log Handler
The following management CLI command assigns a pattern formatter to be used by a periodic
rotating file handler.
/subsystem=logging/periodic-rotating-filehandler=FILE_HANDLER_NAME:write-attribute(name=namedformatter,value=PATTERN_FORMATTER_NAME)
12.8.2. Configure a Custom Log Formatter
You can create a custom log formatter that can be used across log handlers to format log
messages.
This section shows you how to configure a custom log formatter using the management CLI. You
can also configure log formatters using the management console by navigating to the Logging
subsystem from the Configuration tab, selecting the Formatter tab, and selecting Custom from the
left-hand menu.
Configure a Custom Log Formatter
Important
If you are configuring this log formatter for a logging profile, the start of the command
would be /subsystem=logging/logging-profile=LOGGING_PROFILE_NAME/
instead of /subsystem=logging/.
Additionally, if you are running in a managed domain, precede the commands with
/profile=PROFILE_NAME.
1. Add the custom log formatter.
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When adding a custom log formatter, you must specify the Java class of the formatter and
the JBoss EAP module in which it is contained. The class must extend
java.util.logging.Formatter.
Note
You must have already created a module containing the custom formatter or this
command will fail.
/subsystem=logging/customformatter=CUSTOM_FORMATTER_NAME:add(class=CLASS_NAME,
module=MODULE_NAME)
2. Set the necessary properties for the log formatter.
The properties must be accessible using a setter method.
/subsystem=logging/custom-formatter=CUSTOM_FORMATTER_NAME:writeattribute(name=properties.PROPERTY_NAME,value=PROPERTY_VALUE)
3. Assign the custom formatter to a log handler.
The following management CLI command assigns a custom formatter to be used by a
periodic rotating file handler.
/subsystem=logging/periodic-rotating-filehandler=FILE_HANDLER_NAME:write-attribute(name=named-formatter,
value=CUSTOM_FORMATTER_NAME)
Example Custom XML Formatter
The following example configures a custom XML formatter. It uses the
java.util.logging.XMLFormatter class provided in the org.jboss.logmanager module
and assigns it to the console log handler.
/subsystem=logging/custom-formatter=custom-xmlformatter:add(class=java.util.logging.XMLFormatter,
module=org.jboss.logmanager)
/subsystem=logging/console-handler=CONSOLE:write-attribute(name=namedformatter, value=custom-xml-formatter)
A log message using this formatter would be formatted as below.
2016-03-23T12:58:13
1458752293091
93963
org.jboss.as
INFO
org.jboss.as.server.BootstrapListener
logAdminConsole
22
WFLYSRV0051: Admin console listening on
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http://%s:%d
127.0.0.1
9990
12.9. LOGGING PROFILES
Logging profiles are independent sets of logging configurations that can be assigned to deployed
applications. As with the regular logging subsystem, a logging profile can define handlers,
categories, and a root logger, but it cannot refer to configurations in other profiles or the main
logging subsystem. The design of logging profiles mimics the logging subsystem for ease of
configuration.
Logging profiles allow administrators to create logging configurations that are specific to one or more
applications without affecting any other logging configurations. Because each profile is defined in
the server configuration, the logging configuration can be changed without requiring that the affected
applications be redeployed. However, logging profiles cannot be configured using the management
console.
Each logging profile can have:
A unique name (required)
Any number of log handlers
Any number of log categories
Up to one root logger
An application can specify a logging profile to use in its MANIFEST.MF file, using the loggingprofile attribute.
12.9.1. Configure a Logging Profile
A logging profile can be configured with log handlers, categories, and a root logger. It uses almost
exactly the same syntax as the main logging subsystem. There are two differences between
configuring the main logging subsystem and the logging profile:
The root configuration path is /subsystem=logging/logging-profile=NAME.
A logging profile cannot contain other logging profiles.
Creating and Configuring a Logging Profile
The following procedure uses the management CLI to create a logging profile and set a file handler
and logger category.
1. Create the logging profile.
/subsystem=logging/logging-profile=PROFILE_NAME:add
2. Create the file handler.
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/subsystem=logging/logging-profile=PROFILE_NAME/filehandler=FILE_HANDLER_NAME:add(file={path=>"LOG_NAME.log",
"relative-to"=>"jboss.server.log.dir"})
/subsystem=logging/logging-profile=PROFILE_NAME/filehandler=FILE_HANDLER_NAME:write-attribute(name="level",
value="DEBUG")
3. Create the logger category.
/subsystem=logging/loggingprofile=PROFILE_NAME/logger=CATEGORY_NAME:add(level=TRACE)
4. Assign the file handler to the category.
/subsystem=logging/loggingprofile=PROFILE_NAME/logger=CATEGORY_NAME:addhandler(name="FILE_HANDLER_NAME")
12.9.2. Specify a Logging Profile in an Application
An application specifies the logging profile to use in its MANIFEST.MF file.
Note
You must know the name of the logging profile that has been set up on the server for this
application to use.
To add a logging profile configuration to an application, edit the MANIFEST.MF file.
If your application does not have a MANIFEST.MF file, create one with the following content to
specify the logging profile name.
Manifest-Version: 1.0
Logging-Profile: LOGGING_PROFILE_NAME
If your application already has a MANIFEST.MF file, add the following line to specify the logging
profile name.
Logging-Profile: LOGGING_PROFILE_NAME
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Note
If you are using Maven and the maven-war-plugin, put your MANIFEST.MF file in
src/main/resources/META-INF/ and add the following configuration to your
pom.xml file:
maven-war-plugin
src/main/resources/METAINF/MANIFEST.MF
When the application is deployed, it will use the configuration in the specified logging profile for its
log messages.
12.9.3. Example Logging Profile Configuration
This example shows the configuration of a logging profile and the application that uses it. It shows
the management CLI commands, the resulting XML, and the application’s MANIFEST.MF file.
The example logging profile has the following characteristics:
The name is accounts-app-profile.
The log category is com.company.accounts.ejbs.
The log level TRACE.
The log handler is a file handler using the file ejb-trace.log.
Management CLI Session
/subsystem=logging/logging-profile=accounts-app-profile:add
/subsystem=logging/logging-profile=accounts-app-profile/filehandler=ejb-trace-file:add(file={path=>"ejb-trace.log", "relativeto"=>"jboss.server.log.dir"})
/subsystem=logging/logging-profile=accounts-app-profile/filehandler=ejb-trace-file:write-attribute(name="level", value="DEBUG")
/subsystem=logging/logging-profile=accounts-appprofile/logger=com.company.accounts.ejbs:add(level=TRACE)
/subsystem=logging/logging-profile=accounts-appprofile/logger=com.company.accounts.ejbs:add-handler(name="ejb-tracefile")
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XML Configuration
Application MANIFEST.MF file
Manifest-Version: 1.0
Logging-Profile: accounts-app-profile
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CHAPTER 13. DATASOURCE MANAGEMENT
13.1. ABOUT JBOSS EAP DATASOURCES
About JDBC
The JDBC API is the standard that defines how databases are accessed by Java applications. An
application configures a datasource that references a JDBC driver. Application code can then be
written against the driver, rather than the database. The driver converts the code to the database
language. This means that if the correct driver is installed, an application can be used with any
supported database.
For more information, see the JDBC 4.0 specification.
Supported Databases
See JBoss EAP supported configurations for the list of JDBC-compliant databases supported by
JBoss EAP 7.
Datasource Types
The two general types of resources are referred to as datasources and XA datasources.
Non-XA datasources
Used for applications that do not use transactions, or applications that use transactions with
a single database.
XA datasources
Used by applications that use multiple databases or other XA resources as part of one XA
transaction. XA datasources introduce additional overhead.
You specify which type of datasource to use when creating the datasource using the JBoss EAP
management interfaces.
The ExampleDS datasource
JBoss EAP ships with an example datasource configuration (ExampleDS), which is provided to
demonstrate how datasources are defined. This datasource uses an H2 database, which is a
lightweight, relational database management system that provides developers with the ability to
quickly build applications.
Warning
The ExampleDS datasource and the H2 database should not be used in a production
environment. This is a very small, self-contained datasource that supports all of the
standards needed for testing and building applications, but is not robust or scalable
enough for production use.
13.2. JDBC DRIVERS
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Before defining datasources in JBoss EAP for your applications to use, you must first install the
appropriate JDBC driver.
13.2.1. Install a JDBC Driver as a Core Module
JDBC drivers can be installed as a core module using the management CLI using the following
steps.
1. Download the JDBC driver.
Download the appropriate JDBC driver from your database vendor. See JDBC Driver
Download Locations for standard download locations for JDBC drivers of common
databases.
Make sure to extract the archive if the JDBC driver JAR file is contained within a ZIP or TAR
archive.
2. Start the JBoss EAP server.
3. Launch the management CLI, but do not use the --connect or -c argument to connect to
the running instance.
$ EAP_HOME/bin/jboss-cli.sh
4. Use the module add management CLI command to add the new core module.
module add --name=MODULE_NAME --resources=PATH_TO_JDBC_JAR -dependencies=DEPENDENCIES
For example, the following command adds a MySQL JDBC driver module.
module add --name=com.mysql --resources=/path/to/mysql-connectorjava-5.1.36-bin.jar -dependencies=javax.api,javax.transaction.api
Note
The module add management CLI command performs the following steps,
which could instead be completed manually if desired:
1. A file path structure will be created under the EAP_HOME/modules
directory. For example, for a MySQL JDBC driver, the following will be
created: EAP_HOME/modules/com/mysql/main/.
2. The JAR files specified as resources will be copied to the main/
subdirectory.
3. A module.xml file with the specified dependencies will be created in the
main/ subdirectory.
Execute module --help for more details on using this command to add and remove
modules.
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5. Use the connect management CLI command to connect to the running instance.
connect
6. Register the JDBC driver. When running in a managed domain, be sure to precede this
command with /profile=PROFILE_NAME.
/subsystem=datasources/jdbc-driver=DRIVER_NAME:add(drivername=DRIVER_NAME,driver-module-name=MODULE_NAME,driver-xadatasource-class-name=XA_DATASOURCE_CLASS_NAME, driver-classname=DRIVER_CLASS_NAME)
Note
The driver-class-name parameter is only required if the JDBC driver jar
defines more than one class in its /META-INF/services/java.sql.Driver
file.
For example, the /META-INF/services/java.sql.Driver file in the MySQL
5.1.36 JDBC driver JAR defines two classes:
com.mysql.jdbc.Driver
com.mysql.fabric.jdbc.FabricMySQLDriver
For this case, you would pass in driver-classname=com.mysql.jdbc.Driver.
For example, the following command registers a MySQL JDBC driver.
/subsystem=datasources/jdbc-driver=mysql:add(drivername=mysql,driver-module-name=com.mysql,driver-xa-datasourceclass-name=com.mysql.jdbc.jdbc2.optional.MysqlXADataSource,
driver-class-name=com.mysql.jdbc.Driver)
The JDBC driver is now available to be referenced by application datasources.
13.2.2. Install a JDBC Driver as a JAR Deployment
JDBC drivers can be installed as a JAR deployment using either the management CLI or the
management console. As long as the driver is JDBC 4-compliant, it will automatically be recognized
and installed as a JDBC driver upon deployment.
The following steps describe how to install a JDBC driver using the management CLI.
Note
The recommended installation method for JDBC drivers is to install them as a core
module.
1. Download the JDBC driver.
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Download the appropriate JDBC driver from your database vendor. See JDBC Driver
Download Locations for standard download locations for JDBC drivers of common
databases.
Make sure to extract the archive if the JDBC driver JAR file is contained within a ZIP or TAR
archive.
2. If the JDBC driver is not JDBC 4-compliant, see the steps to Update a JDBC Driver JAR to
be JDBC 4-Compliant.
3. Deploy the JAR to JBoss EAP.
deploy PATH_TO_JDBC_JAR
Note
In a managed domain, specify the appropriate server groups.
For example, the following command deploys a MySQL JDBC driver.
deploy /path/to/mysql-connector-java-5.1.36-bin.jar
A message will be displayed in the JBoss EAP server log that displays the deployed driver
name, which will be used when defining datasources.
WFLYJCA0018: Started Driver service with driver-name = mysqlconnector-java-5.1.36-bin.jar_com.mysql.jdbc.Driver_5_1
The JDBC driver is now available to be referenced by application datasources.
Update a JDBC Driver JAR to be JDBC 4-Compliant
If the JDBC driver JAR is not JDBC 4-compliant, it can be made deployable using the following
steps.
1. Create an empty temporary directory.
2. Create a META-INF subdirectory.
3. Create a META-INF/services subdirectory.
4. Create a META-INF/services/java.sql.Driver file and add one line to indicate the
fully-qualified class name of the JDBC driver.
For example, the below line would be added for a MySQL JDBC driver.
com.mysql.jdbc.Driver
5. Use the JAR command-line tool to add this new file to the JAR.
jar \-uf jdbc-driver.jar META-INF/services/java.sql.Driver
13.2.3. JDBC Driver Download Locations
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The following table gives the standard download locations for JDBC drivers of common databases
used with JBoss EAP.
Note
These links point to third-party websites which are not controlled or actively monitored by
Red Hat. For the most up-to-date drivers for your database, check your database vendor’s
documentation and website.
Table 13.1. JDBC Driver Download Locations
Vendor
Download Location
MySQL
http://www.mysql.com/products/connector/
PostgreSQL
http://jdbc.postgresql.org/
Oracle
http://www.oracle.com/technetwork/database/featur
es/jdbc/index-091264.html
IBM
http://www-306.ibm.com/software/data/db2/java/
Sybase
The jConnect JDBC driver is part of the SDK for
SAP ASE installation. Currently there is not a
separate download site for this driver by itself.
Microsoft
http://msdn.microsoft.com/data/jdbc/
13.2.4. Access Vendor-Specific Classes
In some cases, it is necessary for an application to use vendor-specific functionality that is not part
of the JDBC API. In these cases, you can access vendor-specific APIs by declaring a dependency
in that application.
Warning
This is advanced usage. Only applications that need functionality not found in the JDBC
API should implement this procedure.
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Important
This process is required when using the reauthentication mechanism, and accessing
vendor-specific classes.
You can define a dependency for an application using either the MANIFEST.MF file or a jbossdeployment-structure.xml file.
If you have not yet done so, Install a JDBC Driver as a Core Module.
Using the MANIFEST.MF File
1. Edit the application’s META-INF/MANIFEST.MF file.
2. Add the Dependencies line and specify the module name.
For example, the below line declares the com.mysql module as a dependency.
Dependencies: com.mysql
Using a jboss-deployment-structure.xml File
1. Create a file called jboss-deployment-structure.xml in the META-INF/ or WEBINF/ folder of the application.
2. Specify the module using the dependencies element.
For example, the following example jboss-deployment-structure.xml file declares
the com.mysql module as a dependency.
The example code below accesses the MySQL API.
import java.sql.Connection;
import org.jboss.jca.adapters.jdbc.WrappedConnection;
...
Connection c = ds.getConnection();
WrappedConnection wc = (WrappedConnection)c;
com.mysql.jdbc.Connection mc = wc.getUnderlyingConnection();
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Important
Follow the vendor-specific API guidelines closely, as the connection is being controlled by
the IronJacamar container.
13.3. CREATING DATASOURCES
Datasources can be created using the management console or the management CLI.
JBoss EAP 7 allows you to use expressions in datasource attribute values, such as the enabled
attribute. See the Property Replacement section for details on using expressions in the
configuration.
13.3.1. Create a Non-XA Datasource
Non-XA datasources can be defined using the data-source add management CLI command.
You can also define non-XA datasources using the management console by navigating to
Configuration → Subsystems → Datasources → Non-XA and clicking Add to open the Create
Datasource wizard.
The below steps describe how to define a non-XA datasource using the management CLI.
1. If you have not yet done so, install and register the appropriate JDBC Driver as a Core
Module.
2. Define the datasource using the data-source add command, specifying the appropriate
argument values.
data-source add --name=DATASOURCE_NAME --jndi-name=JNDI_NAME -driver-name=DRIVER_NAME --connection-url=CONNECTION_URL
Note
In a managed domain, you must specify the --profile=PROFILE_NAME argument.
See the Datasource Parameters section below for tips on these parameter values.
For detailed examples, see the Example Datasource Configurations for the supported databases.
Datasource Parameters
jndi-name
The JNDI name for the datasource must start with java:/ or java:jboss/. For example,
java:jboss/datasources/ExampleDS.
driver-name
The driver name value depends on whether the JDBC driver was installed as a core module
or a JAR deployment.
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1. For a core module, the driver name value will be the name given to the JDBC driver
when it was registered.
2. For a JAR deployment, the driver name is the name of the JAR if there is only one
class listed in its /META-INF/services/java.sql.Driver file. If there are
multiple classes listed, then the value is JAR_NAME + "_" +
DRIVER_CLASS_NAME + "_" + MAJOR_VERSION + "_" + MINOR_VERSION (for
example mysql-connector-java-5.1.36bin.jar_com.mysql.jdbc.Driver_5_1).
You can also see the driver name listed in the JBoss EAP server log when the
JDBC JAR is deployed.
WFLYJCA0018: Started Driver service with driver-name =
mysql-connector-java-5.1.36bin.jar_com.mysql.jdbc.Driver_5_1
connection-url
For details on the connection URL formats for the supported databases, see the list of
Datasource Connection URLs.
For a complete listing of all available datasource parameters, see the Datasource Parameters
section.
13.3.2. Create an XA Datasource
XA datasources can be defined using the xa-data-source add management CLI command. You
can also define XA datasources using the management console by navigating to Configuration →
Subsystems → Datasources → XA and clicking Add to open the Create XA Datasource wizard.
The below steps describe how to define an XA datasource using the management CLI.
Note
In a managed domain, you will need to specify the profile to use. Depending on the format
of the management CLI command, you will either precede the command with
/profile=PROFILE_NAME or pass in the --profile=PROFILE_NAME argument.
1. If you have not yet done so, install and register the appropriate JDBC Driver as a Core
Module.
2. Define the datasource using the xa-data-source add command, specifying the
appropriate argument values.
xa-data-source add --name=XA_DATASOURCE_NAME --jndiname=JNDI_NAME --driver-name=DRIVER_NAME --xa-datasourceclass=XA_DATASOURCE_CLASS --xa-datasource-properties=
{"ServerName"=>"HOSTNAME","DatabaseName"=>"DATABASE_NAME"}
See the Datasource Parameters section below for tips on these parameter values.
3. Set XA datasource properties.
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At least one XA datasource property is required when defining an XA datasource or you will
receive an error when adding the datasource in the previous step. Any properties that were
not set when defining the XA datasource can be set individually afterward.
a. Set the server name.
/subsystem=datasources/xa-datasource=XA_DATASOURCE_NAME/xa-datasourceproperties=ServerName:add(value=HOSTNAME)
b. Set the database name.
/subsystem=datasources/xa-datasource=XA_DATASOURCE_NAME/xa-datasourceproperties=DatabaseName:add(value=DATABASE_NAME)
For detailed examples, see the Example Datasource Configurations for the supported databases.
Datasource Parameters
jndi-name
The JNDI name for the datasource must start with java:/ or java:jboss/. For example,
java:jboss/datasources/ExampleDS.
driver-name
The driver name value depends on whether the JDBC driver was installed as a core module
or a JAR deployment.
1. For a core module, the driver name value will be the name given to the JDBC driver
when it was registered.
2. For a JAR deployment, the driver name is the name of the JAR if there is only one
class listed in its /META-INF/services/java.sql.Driver file. If there are
multiple classes listed, then the value is JAR_NAME + "_" +
DRIVER_CLASS_NAME + "_" + MAJOR_VERSION + "_" + MINOR_VERSION (for
example mysql-connector-java-5.1.36bin.jar_com.mysql.jdbc.Driver_5_1).
You can also see the driver name listed in the JBoss EAP server log when the
JDBC JAR is deployed.
WFLYJCA0018: Started Driver service with driver-name =
mysql-connector-java-5.1.36bin.jar_com.mysql.jdbc.Driver_5_1
xa-datasource-class
Specify the XA datasource class for the JDBC driver’s implementation of the
javax.sql.XADataSource class.
xa-datasource-properties
At least one XA datasource property is required when defining an XA datasource or you will
receive an error when attempting to add it. Additional properties can also be added to the
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XA datasource after it has been defined.
For a complete listing of all available datasource parameters, see the Datasource Parameters
section.
13.4. MODIFYING DATASOURCES
Datasources settings can be configured using the management console or the management CLI.
JBoss EAP 7 allows you to use expressions in datasource attribute values, such as the enabled
attribute. See the Property Replacement section for details on using expressions in the
configuration.
13.4.1. Modify a Non-XA Datasource
Non-XA datasource settings can be updated using the data-source management CLI command.
You can also update datasource attributes from the Datasources subsystem in the management
console.
Note
Non-XA datasources can be integrated with JTA transactions. To integrate the datasource
with JTA, ensure that the jta parameter is set to true.
Settings for a datasource can be updated by using the following management CLI command.
data-source --name=DATASOURCE_NAME --ATTRIBUTE_NAME=ATTRIBUTE_VALUE
Note
In a managed domain, you must specify the --profile=PROFILE_NAME argument.
A server reload may be required for the changes to take effect.
13.4.2. Modify an XA Datasource
XA datasource settings can be updated using the xa-data-source management CLI command.
You can also update datasource attributes from the Datasources subsystem in the management
console.
Settings for an XA datasource can be updated by using the following management CLI
command.
xa-data-source --name=XA_DATASOURCE_NAME -ATTRIBUTE_NAME=ATTRIBUTE_VALUE
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Note
In a managed domain, you must specify the --profile=PROFILE_NAME argument.
An XA datasource property can be added using the following management CLI command.
/subsystem=datasources/xa-data-source=XA_DATASOURCE_NAME/xadatasource-properties=PROPERTY:add(value=VALUE)
Note
In a managed domain, you must precede this command with
/profile=PROFILE_NAME.
A server reload may be required for the changes to take effect.
13.5. REMOVING DATASOURCES
Datasources can be removed using the management console or the management CLI.
13.5.1. Remove a Non-XA Datasource
Non-XA datasources can be removed using the data-source remove management CLI
command. You can also remove datasources from the Datasources subsystem in the management
console.
data-source remove --name=DATASOURCE_NAME
Note
In a managed domain, you must specify the --profile=PROFILE_NAME argument.
The server will require a reload after the datasource is removed.
13.5.2. Remove an XA Datasource
XA datasources can be removed using the xa-data-source remove management CLI
command. You can also remove XA datasources from the Datasources subsystem in the
management console.
xa-data-source remove --name=XA_DATASOURCE_NAME
Note
In a managed domain, you must specify the --profile=PROFILE_NAME argument.
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The server will require a reload after the XA datasource is removed.
13.6. TESTING DATASOURCE CONNECTIONS
Once a datasource has been added to JBoss EAP, you can test the connection to verify that the
settings are correct. Datasource connections can be tested either using a management CLI
command or from the management console with the Test Connection button in the Datasources
subsystem.
The following management CLI command can be used to test a datasource’s connection.
/subsystem=datasources/data-source=DATASOURCE_NAME:test-connection-inpool
Note
In a managed domain, you must precede this command with
/host=HOSTNAME/server=SERVER_NAME.
13.7. XA DATASOURCE RECOVERY
An XA datasource is a datasource that can participate in an XA global transaction, which is
coordinated by the transaction manager and can span multiple resources in a single transaction. If
one of the participants fails to commit its changes, the other participants abort the transaction and
restore their state as it was before the transaction occurred. This is to maintain consistency and
avoid potential data loss or corruption.
XA recovery is the process of ensuring that all resources affected by a transaction are updated or
rolled back, even if any of the resources or transaction participants crash or become unavailable.
XA recovery happens without user intervention.
Each XA resource needs to have a recovery module associated with its configuration. The recovery
module is the code that is executed when recovery is being performed. JBoss EAP automatically
registers recovery modules for JDBC XA resources. You can register a custom module with your XA
datasource if you wish to implement custom recovery code. The recovery module must extend class
com.arjuna.ats.jta.recovery.XAResourceRecovery.
13.7.1. Configuring XA Recovery
For most JDBC resources, the recovery module is automatically associated with the resource. In
these cases, you only need to configure the options that allow the recovery module to connect to
your resource to perform recovery.
The following table describes the XA datasource parameters specific to XA recovery. Each of these
configuration attributes can be set during datasource creation or afterward. You can set them using
either the management console or the management CLI. See Modify an XA Datasource for
information on configuring XA datasources.
Table 13.2. Datasource Parameters for XA Recovery
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Attribute
Description
recovery-username
The user name to use to connect to the resource for recovery. Note that
if this is not specified, the datasource security settings will be used.
recovery-password
The password to use to connect to the resource for recovery. Note that if
this is not specified, the datasource security settings will be used.
recovery-security-domain
The security domain to use to connect to the resource for recovery.
recovery-plugin-class-name
If you need to use a custom recovery module, set this attribute to the
fully-qualified class name of the module. The module should extend
class
com.arjuna.ats.jta.recovery.XAResourceRecovery.
recovery-plugin-properties
If you use a custom recovery module which requires properties to be set,
set this attribute to the list of comma-separated KEY=VALUE pairs for the
properties.
Disable XA Recovery
If multiple XA datasources connect to the same physical database, then XA recovery typically needs
to be configured for only one of them.
Use the following management CLI command to disable recovery for an XA datasource:
/subsystem=datasources/xa-data-source=XA_DATASOURCE_NAME:writeattribute(name=no-recovery,value=true)
13.7.2. Vendor-Specific XA Recovery
Vendor-Specific Configuration
Some databases require specific configurations in order to cooperate in XA transactions managed
by the JBoss EAP transaction manager. For detailed and up-to-date information, see your database
vendor’s documentation.
MySQL
No special configuration is required. For more information, see the MySQL documentation.
PostgreSQL and Postgres Plus Advanced Server
For PostgreSQL to be able to handle XA transactions, change the configuration parameter
max_prepared_transactions to a value greater than 0 and equal to or greater than
max_connections.
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Oracle
Ensure that the Oracle user (USER) has access to the tables needed for recovery.
GRANT
GRANT
GRANT
GRANT
SELECT ON sys.dba_pending_transactions TO USER;
SELECT ON sys.pending_trans$ TO USER;
SELECT ON sys.dba_2pc_pending TO USER;
EXECUTE ON sys.dbms_xa TO USER;
If the Oracle user does not have the proper permissions, you may see an error such as the
following:
WARN [com.arjuna.ats.jta.logging.loggerI18N]
[com.arjuna.ats.internal.jta.recovery.xarecovery1] Local
XARecoveryModule.xaRecovery got XA exception
javax.transaction.xa.XAException, XAException.XAER_RMERR
Microsoft SQL Server
For more information, see the Microsoft SQL Server documentation, including
http://msdn.microsoft.com/en-us/library/aa342335.aspx.
IBM DB2
No special configuration is required. For more information, see the IBM DB2 documentation.
Sybase
Sybase expects XA transactions to be enabled on the database. Without correct database
configuration, XA transactions will not work. The enable xact coordination
parameter enables or disables Adaptive Server transaction coordination services. When this
parameter is enabled, Adaptive Server ensures that updates to remote Adaptive Server data
commit or roll back with the original transaction.
To enable transaction coordination, use:
sp_configure 'enable xact coordination', 1
MariaDB
No special configuration is required. For more information, see the MariaDB documentation.
Known Issues
These known issues with handling XA transactions are for the specific database and JDBC driver
versions supported with JBoss EAP 7. For up-to-date information on the supported databases, see
JBoss EAP supported configurations.
MySQL
MySQL is not fully capable of handling XA transactions. If a client is disconnected from
MySQL, then all the information about such transactions is lost. See this MySQL bug for
more information. Note that this issue was fixed in MySQL 5.7.
PostgreSQL and Postgres Plus Advanced Server
The JDBC driver returns the XAER_RMERR XAException error code when a network failure
occurs during the commit phase of two-phase commit (2PC). This error signals an
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unrecoverable catastrophic event to the transaction manager, but the transaction is left in
the in-doubt state on the database side and could be easily corrected after network
connection is established again. The correct return code should be XAER_RMFAIL or
XAER_RETRY. The incorrect error code causes the transaction to be left in the Heuristic
state on the JBoss EAP side and holding locks in the database which requires manual
intervention. See this PostgreSQL bug for more information.
If a connection failure happens when the one-phase commit optimization is used, the JDBC
driver returns XAER_RMERR, but the XAER_RMFAIL error code should be returned. This
could lead to data inconsistency if the database commits data during one-phase commit and
the connection goes down at that moment, then the client is informed that transaction was
rolled back.
The Postgres Plus JDBC driver returns XIDs for all prepared transactions that exist in the
Postgres Plus Server, so there is no way to determine the database to which the XID
belongs. If you define more than one data source for the same database in JBoss EAP, an
in-doubt transaction recovery attempt could be run under wrong account, which causes the
recovery to fail.
Oracle
The JDBC driver returns XIDs belonging to all users on the database instance, when the
Recovery Manager calls recovery using datasource configured with some user credentials.
The JDBC driver throws the exception ORA-24774: cannot switch to specified
transaction because it tries to recover XIDs belonging to other users.
The workaround for this issue is to grant FORCE ANY TRANSACTION privilege to the user
whose credentials are used in recovery datasource configuration. More information about
configuring the privilege can be found here:
http://docs.oracle.com/database/121/ADMIN/ds_txnman.htm#ADMIN12259
Microsoft SQL Server
The JDBC driver returns the XAER_RMERR XAException error code when a network failure
occurs during the commit phase of two-phase commit (2PC). This error signals an
unrecoverable catastrophic event to the transaction manager, but the transaction is left in
the in-doubt state on the database side and could be easily corrected after network
connection is established again. The correct return code should be XAER_RMFAIL or
XAER_RETRY. The incorrect error code causes the transaction to be left in the Heuristic
state on the JBoss EAP side and holding locks in the database which requires manual
intervention. See this Microsoft SQL Server issue report for more information.
If a connection failure happens when the one-phase commit optimization is used, the JDBC
driver returns XAER_RMERR, but the XAER_RMFAIL error code should be returned. This
could lead to data inconsistency if the database commits data during one-phase commit and
the connection goes down at that moment, then the client is informed that transaction was
rolled back.
IBM DB2
If a connection failure happens during a one-phase commit, the JDBC driver returns
XAER_RETRY, but the XAER_RMFAIL error code should be returned. This could lead to data
inconsistency if the database commits data during one-phase commit and the connection
goes down at that moment, then the client is informed that transaction was rolled back.
Sybase
The JDBC driver returns the XAER_RMERR XAException error code when a network failure
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occurs during the commit phase of two-phase commit (2PC). This error signals an
unrecoverable catastrophic event to the transaction manager, but the transaction is left in
the in-doubt state on the database side and could be easily corrected after network
connection is established again. The correct return code should be XAER_RMFAIL or
XAER_RETRY. The incorrect error code causes the transaction to be left in the Heuristic
state on the JBoss EAP side and holding locks in the database which requires manual
intervention.
If a connection failure happens when the one-phase commit optimization is used, the JDBC
driver returns XAER_RMERR, but the XAER_RMFAIL error code should be returned. This
could lead to data inconsistency if the database commits data during one-phase commit and
the connection goes down at that moment, then the client is informed that transaction was
rolled back.
MariaDB
MariaDB is not fully capable of handling XA transactions. If a client is disconnected from
MariaDB, then all the information about such transactions is lost.
13.8. DATABASE CONNECTION VALIDATION
Database maintenance, network problems, or other outage events may cause JBoss EAP to lose
the connection to the database. In order to recover from these situations, you can enable database
connection validation for your datasources.
To configure database connection validation, you specify the validation timing method (when the
validation occurs), the validation mechanism (how the validation is performed), and the exception
sorter (how exceptions are handled).
1. Choose one of the validation timing methods.
validate-on-match
When the validate-on-match option is set to true, the database connection is
validated every time it is checked out from the connection pool using the validation
mechanism specified in the next step.
If a connection is not valid, a warning is written to the log and the next connection in
the pool is retrieved. This process continues until a valid connection is found. If you
prefer not to cycle through every connection in the pool, you can use the usefast-fail option. If a valid connection is not found in the pool, a new connection
is created. If the connection creation fails, an exception is returned to the requesting
application.
This setting results in the quickest recovery but creates the highest load on the
database. However, this is the safest selection if the minimal performance hit is not
a concern.
background-validation
When the background-validation option is set to true, connections are
validated periodically in a background thread prior to use. The frequency of the
validation is specified by the background-validation-millis property. The
default value of background-validation-millis is 0, meaning that it is
disabled.
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When determining the value of the background-validation-millis property,
consider the following:
This value should not be set to the same value as your idle-timeoutminutes setting.
The lower the value, the more frequently the pool is validated and the sooner
invalid connections are removed from the pool.
Lower values take more database resources. Higher values result in less
frequent connection validation checks and use less database resources, but
dead connections are undetected for longer periods of time.
Note
These options are mutually exclusive. If validate-on-match is set to true,
then background-validation must be set to false. If backgroundvalidation is set to true, then validate-on-match must be set to false.
2. Choose one of the validation mechanisms.
valid-connection-checker-class-name
Using valid-connection-checker-class-name is the preferred validation
mechanism. This specifies a connection checker class that is used to validate
connections for the particular database in use. JBoss EAP provides the following
connection checkers:
org.jboss.jca.adapters.jdbc.extensions.db2.DB2ValidConnecti
onChecker
org.jboss.jca.adapters.jdbc.extensions.mssql.MSSQLValidConn
ectionChecker
org.jboss.jca.adapters.jdbc.extensions.mysql.MySQLReplicati
onValidConnectionChecker
org.jboss.jca.adapters.jdbc.extensions.mysql.MySQLValidConn
ectionChecker
org.jboss.jca.adapters.jdbc.extensions.novendor.JDBC4ValidC
onnectionChecker
org.jboss.jca.adapters.jdbc.extensions.novendor.NullValidCo
nnectionChecker
org.jboss.jca.adapters.jdbc.extensions.oracle.OracleValidCo
nnectionChecker
org.jboss.jca.adapters.jdbc.extensions.postgres.PostgreSQLV
alidConnectionChecker
org.jboss.jca.adapters.jdbc.extensions.sybase.SybaseValidCo
nnectionChecker
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check-valid-connection-sql
Using check-valid-connection-sql, you provide the SQL statement that will
be used to validate the connection.
The following is an example SQL statement that you might use to validate Oracle
connections.
select 1 from dual
The following is an example SQL statement that you might use to validate MySQL
or PostgreSQL connections.
select 1
3. Set the exception sorter class name.
When an exception is marked as fatal, the connection is closed immediately, even if the
connection is participating in a transaction. Use the exception sorter class option to properly
detect and clean up after fatal connection exceptions. Choose the appropriate JBoss EAP
exception sorter for your datasource type.
org.jboss.jca.adapters.jdbc.extensions.db2.DB2ExceptionSorter
org.jboss.jca.adapters.jdbc.extensions.informix.InformixException
Sorter
org.jboss.jca.adapters.jdbc.extensions.mssql.MSSQLExceptionSorter
org.jboss.jca.adapters.jdbc.extensions.mysql.MySQLExceptionSorter
org.jboss.jca.adapters.jdbc.extensions.novendor.NullExceptionSort
er
org.jboss.jca.adapters.jdbc.extensions.oracle.OracleExceptionSort
er
org.jboss.jca.adapters.jdbc.extensions.postgres.PostgreSQLExcepti
onSorter
org.jboss.jca.adapters.jdbc.extensions.sybase.SybaseExceptionSort
er
13.9. DATASOURCE SECURITY
Datasource security refers to encrypting or obscuring passwords for datasource connections. These
passwords can be stored in plain text in configuration files, however this represents a security risk.
The preferred solution for datasource security is the use of either security domains or password
vaults. Examples of each are included below.
Secure a Datasource Using a Security Domain
A security domain for the datasource is defined.
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Note
If a security domain will be used with multiple datasources, then caching should be
disabled on the security domain. This can be accomplished by setting the value of the
cache-type attribute to none or by removing the attribute altogether. However, if
caching is desired, then a separate security domain should be used for each datasource.
The DsRealm security domain is then referenced by the datasource configuration.
jdbc:h2:mem:test;DB_CLOSE_DELAY=-1
h2
select current_user()
DsRealm
For more information on using Security Domains, see the How to Configure Identity Management
guide.
Secure a Datasource Using a Password Vault
admin
${VAULT::ds_ExampleDS::password::N2NhZDYzOTMtNWE0OS00ZGQ0LWE4Mm
EtMWNlMDMyNDdmNmI2TElORV9CUkVBS3ZhdWx0}
For more information on using the Password Vault, see the How To Configure Server Security guide.
13.10. DATASOURCE STATISTICS
You can view core pool and JDBC runtime statistics for defined datasources. See the Datasource
Statistics for a detailed list of all available statistics.
Enable Datasource Statistics
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By default, datasource statistics are not enabled. The following management CLI commands enable
the collection of statistics for the ExampleDS datasource.
Note
In a managed domain, precede these commands with /profile=PROFILE_NAME.
/subsystem=datasources/data-source=ExampleDS/statistics=pool:writeattribute(name=statistics-enabled,value=true)
/subsystem=datasources/data-source=ExampleDS/statistics=jdbc:writeattribute(name=statistics-enabled,value=true)
View Datasource Statistics
All datasource statistics can be retrieved from the management CLI. A subset of these statistics can
be viewed from the Runtime tab of the management console.
The following management CLI command retrieves the core pool statistics for the ExampleDS
datasource.
Note
In a managed domain, precede these commands with
/host=HOST_NAME/server=SERVER_NAME.
/subsystem=datasources/data-source=ExampleDS/statistics=pool:readresource(include-runtime=true)
{
"outcome" => "success",
"result" => {
"ActiveCount" => 1,
"AvailableCount" => 20,
"AverageBlockingTime" => 0L,
"AverageCreationTime" => 122L,
"AverageGetTime" => 128L,
"AveragePoolTime" => 0L,
"AverageUsageTime" => 0L,
"BlockingFailureCount" => 0,
"CreatedCount" => 1,
"DestroyedCount" => 0,
"IdleCount" => 1,
...
}
The following management CLI command retrieves the JDBC statistics for the ExampleDS
datasource.
/subsystem=datasources/data-source=ExampleDS/statistics=jdbc:readresource(include-runtime=true)
{
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"outcome" => "success",
"result" => {
"PreparedStatementCacheAccessCount" => 0L,
"PreparedStatementCacheAddCount" => 0L,
"PreparedStatementCacheCurrentSize" => 0,
"PreparedStatementCacheDeleteCount" => 0L,
"PreparedStatementCacheHitCount" => 0L,
"PreparedStatementCacheMissCount" => 0L,
"statistics-enabled" => true
}
}
Note
Since statistics are runtime information, be sure to specify the include-runtime=true
argument.
13.11. CAPACITY POLICIES
JBoss EAP supports defining capacity polices for JCA deployments, including datasources.
Capacity policies define how physical connections for a pool are created (capacity incrementing)
and destroyed (capacity decrementing). The default policies are set to to create once connection per
request for capacity incrementing, and destroy all connections when they time out when the idle
timeout is scheduled for capacity decrementing.
To configure capacity polices, you need to specify a capacity incrementer and/or decrementer class:
Example commands
/subsystem=datasources/data-source=ExampleDS:writeattribute(name=capacity-incrementer-class,
value="org.jboss.jca.core.connectionmanager.pool.capacity.SizeIncrement
er")
/subsystem=datasources/data-source=ExampleDS:writeattribute(name=capacity-decrementer-class,
value="org.jboss.jca.core.connectionmanager.pool.capacity.SizeDecrement
er")
You can also configure properties on the specified capacity incrementer or decrementer class:
Example Commands
/subsystem=datasources/data-source=ExampleDS:writeattribute(name=capacity-incrementer-properties.size, value=2)
/subsystem=datasources/data-source=ExampleDS:writeattribute(name=capacity-decrementer-properties.size, value=2)
MaxPoolSize Incrementer Policy
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Class name:
org.jboss.jca.core.connectionmanager.pool.capacity.MaxPoolSizeIncrementer
The MaxPoolSize incrementer policy will fill the pool to its max size for each request. This policy is
useful when you want to keep the maximum number of connections available all the time.
Size Incrementer Policy
Class name:
org.jboss.jca.core.connectionmanager.pool.capacity.SizeIncrementer
The Size incrementer policy will fill the pool by the specified number of connections for each request.
This policy is useful when you want to increment with an additional number of connections per
request in anticipation that the next request will also need a connection.
Table 13.3. Size policy properties
Name
Description
Size
The number of connections that should be created
Note
This is the default increment policy with a size value of 1.
Watermark Incrementer Policy
Class name:
org.jboss.jca.core.connectionmanager.pool.capacity.WatermarkIncrementer
The Watermark incrementer policy will fill the pool to the specified number of connections for each
request. This policy is useful when you want to keep a specified number of connections in the pool
at all time.
Table 13.4. Watermark policy properties
Name
Description
Watermark
The watermark level for the number of connections
MinPoolSize Decrementer Policy
Class name:
org.jboss.jca.core.connectionmanager.pool.capacity.MinPoolSizeDecrementer
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The MinPoolSize decrementer policy will decrement the pool to its min size for each request. This
policy is useful when you want to limit the number of connections after each idle timeout request.
The pool will operate in a First In First Out (FIFO) manner.
Size Decrementer Policy
Class name:
org.jboss.jca.core.connectionmanager.pool.capacity.SizeDecrementer
The Size decrementer policy will decrement the pool by the specified number of connections for
each idle timeout request.
Table 13.5. Size policy properties
Name
Description
Size
The number of connections that should be
destroyed
This policy is useful when you want to decrement an additional number of connections per idle
timeout request in anticipation that the pool usage will lower over time.
The pool will operate in a First In First Out (FIFO) manner.
TimedOut Decrementer Policy
Class name:
org.jboss.jca.core.connectionmanager.pool.capacity.TimedOutDecrementer
The TimedOut decrementer policy will removed all connections that have timed out from the pool for
each idle timeout request. The pool will operate in a First In Last Out (FILO) manner.
Note
This policy is the default decrement policy.
TimedOut/FIFO Decrementer Policy
Class name:
org.jboss.jca.core.connectionmanager.pool.capacity.TimedOutFIFODecremente
r
The TimedOutFIFO decrementer policy will removed all connections that have timed out from the
pool for each idle timeout request. The pool will operate in a First In First Out (FIFO) manner.
Watermark Decrementer Policy
Class name:
org.jboss.jca.core.connectionmanager.pool.capacity.WatermarkDecrementer
The Watermark decrementer policy will decrement the pool to the specified number of connections
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for each idle timeout request. This policy is useful when you want to keep a specified number of
connections in the pool at all time. The pool will operate in a First In First Out (FIFO) manner.
Table 13.6. Watermark policy properties
Name
Description
Watermark
The watermark level for the number of connections
13.12. ENLISTMENT TRACING
Enlistment traces are recorded in order to help locate error situations that happens during enlistment
of XAResource instances. This does have a performance overhead, so in certain situations you
may want to disable these traces.
You can disable the recording of enlistment traces for a datasource using the management CLI by
setting the enlistment-trace attribute to false.
Disable enlistment trace for a non-XA datasource.
data-source --name=DATASOURCE_NAME --enlistment-trace=false
Disable enlistment trace for an XA datasource.
xa-data-source --name=XA_DATASOURCE_NAME --enlistment-trace=false
Warning
Disabling the enlistment trace will make tracking down errors during transaction
enlistment more difficult.
13.13. EXAMPLE DATASOURCE CONFIGURATIONS
13.13.1. Example MySQL Datasource
This is an example of a MySQL datasource configuration with connection information, basic
security, and validation options.
Example MySQL Datasource Configuration
jdbc:mysql://localhost:3306/jbossdb
mysql
admin
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admin
true
false
com.mysql.jdbc.Driver
com.mysql.jdbc.jdbc2.optional.MysqlXADataSource
Example MySQL JDBC Driver module.xml File
Example Management CLI Commands
This example configuration can be achieved by using the following management CLI commands.
1. Add the MySQL JDBC driver as a core module.
module add --name=com.mysql --resources=/path/to/mysql-connectorjava-5.1.36-bin.jar -dependencies=javax.api,javax.transaction.api
2. Register the MySQL JDBC driver.
/subsystem=datasources/jdbc-driver=mysql:add(drivername=mysql,driver-module-name=com.mysql,driver-xa-datasourceclass-name=com.mysql.jdbc.jdbc2.optional.MysqlXADataSource,
driver-class-name=com.mysql.jdbc.Driver)
3. Add the MySQL datasource.
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data-source add --name=MySqlDS --jndi-name=java:jboss/MySqlDS -driver-name=mysql --connectionurl=jdbc:mysql://localhost:3306/jbossdb --user-name=admin -password=admin --validate-on-match=true --backgroundvalidation=false --valid-connection-checker-classname=org.jboss.jca.adapters.jdbc.extensions.mysql.MySQLValidConne
ctionChecker --exception-sorter-classname=org.jboss.jca.adapters.jdbc.extensions.mysql.MySQLExceptionS
orter
13.13.2. Example MySQL XA Datasource
This is an example of a MySQL XA datasource configuration with XA datasource properties, basic
security, and validation options.
Example MySQL XA Datasource Configuration
localhost
mysqldb
mysql
admin
admin
true
false
com.mysql.jdbc.Driver
com.mysql.jdbc.jdbc2.optional.MysqlXADataSource
Example MySQL JDBC Driver module.xml File
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Example Management CLI Commands
This example configuration can be achieved by using the following management CLI commands.
1. Add the MySQL JDBC driver as a core module.
module add --name=com.mysql --resources=/path/to/mysql-connectorjava-5.1.36-bin.jar -dependencies=javax.api,javax.transaction.api
2. Register the MySQL JDBC driver.
/subsystem=datasources/jdbc-driver=mysql:add(drivername=mysql,driver-module-name=com.mysql,driver-xa-datasourceclass-name=com.mysql.jdbc.jdbc2.optional.MysqlXADataSource,
driver-class-name=com.mysql.jdbc.Driver)
3. Add the MySQL XA datasource.
xa-data-source add --name=MySqlXADS --jndiname=java:jboss/MySqlXADS --driver-name=mysql --user-name=admin -password=admin --validate-on-match=true --backgroundvalidation=false --valid-connection-checker-classname=org.jboss.jca.adapters.jdbc.extensions.mysql.MySQLValidConne
ctionChecker --exception-sorter-classname=org.jboss.jca.adapters.jdbc.extensions.mysql.MySQLExceptionS
orter --xa-datasource-properties=
{"ServerName"=>"localhost","DatabaseName"=>"mysqldb"}
13.13.3. Example PostgreSQL Datasource
This is an example of a PostgreSQL datasource configuration with connection information, basic
security, and validation options.
Example PostgreSQL Datasource Configuration
jdbc:postgresql://localhost:5432/postgresdb
postgresql
admin
admin
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true
false
org.postgresql.xa.PGXADataSource
Example PostgreSQL JDBC Driver module.xml File
Example Management CLI Commands
This example configuration can be achieved by using the following management CLI commands.
1. Add the PostgreSQL JDBC driver as a core module.
module add --name=com.postgresql --resources=/path/to/postgresql9.3-1102.jdbc4.jar --dependencies=javax.api,javax.transaction.api
2. Register the PostgreSQL JDBC driver.
/subsystem=datasources/jdbc-driver=postgresql:add(drivername=postgresql,driver-module-name=com.postgresql,driver-xadatasource-class-name=org.postgresql.xa.PGXADataSource)
3. Add the PostgreSQL datasource.
data-source add --name=PostgresDS --jndiname=java:jboss/PostgresDS --driver-name=postgresql --connectionurl=jdbc:postgresql://localhost:5432/postgresdb --user-name=admin
--password=admin --validate-on-match=true --background-
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validation=false --valid-connection-checker-classname=org.jboss.jca.adapters.jdbc.extensions.postgres.PostgreSQLVa
lidConnectionChecker --exception-sorter-classname=org.jboss.jca.adapters.jdbc.extensions.postgres.PostgreSQLEx
ceptionSorter
13.13.4. Example PostgreSQL XA Datasource
This is an example of a PostgreSQL XA datasource configuration with XA datasource properties,
basic security, and validation options.
Example PostgreSQL XA Datasource Configuration
localhost
5432
postgresdb
postgresql
admin
admin
true
false
org.postgresql.xa.PGXADataSource
Example PostgreSQL JDBC Driver module.xml File
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Example Management CLI Commands
This example configuration can be achieved by using the following management CLI commands.
1. Add the PostgreSQL JDBC driver as a core module.
module add --name=com.postgresql --resources=/path/to/postgresql9.3-1102.jdbc4.jar --dependencies=javax.api,javax.transaction.api
2. Register the PostgreSQL JDBC driver.
/subsystem=datasources/jdbc-driver=postgresql:add(drivername=postgresql,driver-module-name=com.postgresql,driver-xadatasource-class-name=org.postgresql.xa.PGXADataSource)
3. Add the PostgreSQL XA datasource.
xa-data-source add --name=PostgresXADS --jndiname=java:jboss/PostgresXADS --driver-name=postgresql --username=admin --password=admin --validate-on-match=true -background-validation=false --valid-connection-checker-classname=org.jboss.jca.adapters.jdbc.extensions.postgres.PostgreSQLVa
lidConnectionChecker --exception-sorter-classname=org.jboss.jca.adapters.jdbc.extensions.postgres.PostgreSQLEx
ceptionSorter --xa-datasource-properties=
{"ServerName"=>"localhost","PortNumber"=>"5432","DatabaseName"=>"
postgresdb"}
13.13.5. Example Oracle Datasource
This is an example of an Oracle datasource configuration with connection information, basic
security, and validation options.
Example Oracle Datasource Configuration
jdbc:oracle:thin:@localhost:1521:XE
oracle
admin
admin
true
false
oracle.jdbc.xa.client.OracleXADataSource
Example Oracle JDBC Driver module.xml File
Example Management CLI Commands
This example configuration can be achieved by using the following management CLI commands.
1. Add the Oracle JDBC driver as a core module.
module add --name=com.oracle -resources=/path/to/misc/jdbc_drivers/oracle/ojdbc7.jar -dependencies=javax.api,javax.transaction.api
2. Register the Oracle JDBC driver.
/subsystem=datasources/jdbc-driver=oracle:add(drivername=oracle,driver-module-name=com.oracle,driver-xa-datasourceclass-name=oracle.jdbc.xa.client.OracleXADataSource)
3. Add the Oracle datasource.
data-source add --name=OracleDS --jndi-name=java:jboss/OracleDS -driver-name=oracle --connectionurl=jdbc:oracle:thin:@localhost:1521:XE --user-name=admin -password=admin --validate-on-match=true --background-
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validation=false --valid-connection-checker-classname=org.jboss.jca.adapters.jdbc.extensions.oracle.OracleValidCon
nectionChecker --exception-sorter-classname=org.jboss.jca.adapters.jdbc.extensions.oracle.OracleExceptio
nSorter --stale-connection-checker-classname=org.jboss.jca.adapters.jdbc.extensions.oracle.OracleStaleCon
nectionChecker
13.13.6. Example Oracle XA Datasource
Important
The following settings must be applied for the user accessing an Oracle XA datasource in
order for XA recovery to operate correctly. The value user is the user defined to connect
from JBoss EAP to Oracle:
GRANT SELECT ON sys.dba_pending_transactions TO user;
GRANT SELECT ON sys.pending_trans$ TO user;
GRANT SELECT ON sys.dba_2pc_pending TO user;
GRANT EXECUTE ON sys.dbms_xa TO user;
This is an example of an Oracle XA datasource configuration with XA datasource properties, basic
security, and validation options.
Example Oracle XA Datasource Configuration
jdbc:oracle:thin:@oracleHostName:1521:orcl
oracle
false
admin
admin
true
false
oracle.jdbc.xa.client.OracleXADataSource
Example Oracle JDBC Driver module.xml File
Example Management CLI Commands
This example configuration can be achieved by using the following management CLI commands.
1. Add the Oracle JDBC driver as a core module.
module add --name=com.oracle -resources=/path/to/misc/jdbc_drivers/oracle/ojdbc7.jar -dependencies=javax.api,javax.transaction.api
2. Register the Oracle JDBC driver.
/subsystem=datasources/jdbc-driver=oracle:add(drivername=oracle,driver-module-name=com.oracle,driver-xa-datasourceclass-name=oracle.jdbc.xa.client.OracleXADataSource)
3. Add the Oracle XA datasource.
xa-data-source add --name=OracleXADS --jndiname=java:jboss/OracleXADS --driver-name=oracle --user-name=admin
--password=admin --validate-on-match=true --backgroundvalidation=false --valid-connection-checker-classname=org.jboss.jca.adapters.jdbc.extensions.oracle.OracleValidCon
nectionChecker --exception-sorter-classname=org.jboss.jca.adapters.jdbc.extensions.oracle.OracleExceptio
nSorter --stale-connection-checker-classname=org.jboss.jca.adapters.jdbc.extensions.oracle.OracleStaleCon
nectionChecker --same-rm-override=false --xa-datasourceproperties={"URL"=>"jdbc:oracle:thin:@oracleHostName:1521:orcl"}
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13.13.7. Example Microsoft SQL Server Datasource
This is an example of a Microsoft SQL Server datasource configuration with connection information,
basic security, and validation options.
Example Microsoft SQL Server Datasource Configuration
jdbc:sqlserver://localhost:1433;DatabaseName=MyDatabase
sqlserver
admin
admin
true
false
com.microsoft.sqlserver.jdbc.SQLServerXADataSource
Example Microsoft SQL Server JDBC Driver module.xml File
Example Management CLI Commands
This example configuration can be achieved by using the following management CLI commands.
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1. Add the Microsoft SQL Server JDBC driver as a core module.
module add --name=com.microsoft -resources=/path/to/sqljdbc41.jar -dependencies=javax.api,javax.transaction.api
2. Register the Microsoft SQL Server JDBC driver.
/subsystem=datasources/jdbc-driver=sqlserver:add(drivername=sqlserver,driver-module-name=com.microsoft,driver-xadatasource-classname=com.microsoft.sqlserver.jdbc.SQLServerXADataSource)
3. Add the Microsoft SQL Server datasource.
data-source add --name=MSSQLDS --jndi-name=java:jboss/MSSQLDS -driver-name=sqlserver --connectionurl=jdbc:sqlserver://localhost:1433;DatabaseName=MyDatabase -user-name=admin --password=admin --validate-on-match=true -background-validation=false --valid-connection-checker-classname=org.jboss.jca.adapters.jdbc.extensions.mssql.MSSQLValidConne
ctionChecker --exception-sorter-classname=org.jboss.jca.adapters.jdbc.extensions.mssql.MSSQLExceptionS
orter
13.13.8. Example Microsoft SQL Server XA Datasource
This is an example of a Microsoft SQL Server XA datasource configuration with XA datasource
properties, basic security, and validation options.
Example Microsoft SQL Server XA Datasource Configuration
localhost
mssqldb
cursor
sqlserver
false
admin
admin
true
false
com.microsoft.sqlserver.jdbc.SQLServerXADataSource
Example Microsoft SQL Server JDBC Driver module.xml File
Example Management CLI Commands
This example configuration can be achieved by using the following management CLI commands.
1. Add the Microsoft SQL Server JDBC driver as a core module.
module add --name=com.microsoft -resources=/path/to/sqljdbc41.jar -dependencies=javax.api,javax.transaction.api
2. Register the Microsoft SQL Server JDBC driver.
/subsystem=datasources/jdbc-driver=sqlserver:add(drivername=sqlserver,driver-module-name=com.microsoft,driver-xadatasource-classname=com.microsoft.sqlserver.jdbc.SQLServerXADataSource)
3. Add the Microsoft SQL Server XA datasource.
xa-data-source add --name=MSSQLXADS --jndiname=java:jboss/MSSQLXADS --driver-name=sqlserver --username=admin --password=admin --validate-on-match=true -background-validation=false --background-validation=false -valid-connection-checker-class-
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name=org.jboss.jca.adapters.jdbc.extensions.mssql.MSSQLValidConne
ctionChecker --exception-sorter-classname=org.jboss.jca.adapters.jdbc.extensions.mssql.MSSQLExceptionS
orter --same-rm-override=false --xa-datasource-properties=
{"ServerName"=>"localhost","DatabaseName"=>"mssqldb","SelectMetho
d"=>"cursor"}
13.13.9. Example IBM DB2 Datasource
This is an example of an IBM DB2 datasource configuration with connection information, basic
security, and validation options.
Example IBM DB2 Datasource Configuration
jdbc:db2://localhost:50000/ibmdb2db
ibmdb2
0
50
admin
admin
true
false
com.ibm.db2.jcc.DB2XADataSource
Example IBM DB2 JDBC Driver module.xml File
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Example Management CLI Commands
This example configuration can be achieved by using the following management CLI commands.
1. Add the IBM DB2 JDBC driver as a core module.
module add --name=com.ibm --resources=/path/to/db2jcc4.jar -dependencies=javax.api,javax.transaction.api
2. Register the IBM DB2 JDBC driver.
/subsystem=datasources/jdbc-driver=ibmdb2:add(drivername=ibmdb2,driver-module-name=com.ibm,driver-xa-datasourceclass-name=com.ibm.db2.jcc.DB2XADataSource)
3. Add the IBM DB2 datasource.
data-source add --name=DB2DS --jndi-name=java:jboss/DB2DS -driver-name=ibmdb2 --connectionurl=jdbc:db2://localhost:50000/ibmdb2db --user-name=admin -password=admin --validate-on-match=true --backgroundvalidation=false --valid-connection-checker-classname=org.jboss.jca.adapters.jdbc.extensions.db2.DB2ValidConnectio
nChecker --exception-sorter-classname=org.jboss.jca.adapters.jdbc.extensions.db2.DB2ExceptionSorte
r --stale-connection-checker-classname=org.jboss.jca.adapters.jdbc.extensions.db2.DB2StaleConnectio
nChecker --min-pool-size=0 --max-pool-size=50
13.13.10. Example IBM DB2 XA Datasource
This is an example of an IBM DB2 XA datasource configuration with XA datasource properties,
basic security, and validation options.
Example IBM DB2 XA Datasource Configuration
localhost
ibmdb2db
50000
ibmdb2
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false
admin
admin
false
false
false
true
false
com.ibm.db2.jcc.DB2XADataSource
Example IBM DB2 JDBC Driver module.xml File
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Example Management CLI Commands
This example configuration can be achieved by using the following management CLI commands.
1. Add the IBM DB2 JDBC driver as a core module.
module add --name=com.ibm --resources=/path/to/db2jcc4.jar -dependencies=javax.api,javax.transaction.api
2. Register the IBM DB2 JDBC driver.
/subsystem=datasources/jdbc-driver=ibmdb2:add(drivername=ibmdb2,driver-module-name=com.ibm,driver-xa-datasourceclass-name=com.ibm.db2.jcc.DB2XADataSource)
3. Add the IBM DB2 XA datasource.
xa-data-source add --name=DB2XADS --jndi-name=java:jboss/DB2XADS
--driver-name=ibmdb2 --user-name=admin --password=admin -validate-on-match=true --background-validation=false -background-validation=false --valid-connection-checker-classname=org.jboss.jca.adapters.jdbc.extensions.db2.DB2ValidConnectio
nChecker --exception-sorter-classname=org.jboss.jca.adapters.jdbc.extensions.db2.DB2ExceptionSorte
r --stale-connection-checker-classname=org.jboss.jca.adapters.jdbc.extensions.db2.DB2StaleConnectio
nChecker --same-rm-override=false --recovery-plugin-classname=org.jboss.jca.core.recovery.ConfigurableRecoveryPlugin -recovery-plugin-properties=
{"EnableIsValid"=>"false","IsValidOverride"=>"false","EnableClose
"=>"false"} --xa-datasource-properties=
{"ServerName"=>"localhost","DatabaseName"=>"ibmdb2db","PortNumber
"=>"50000"}
13.13.11. Example Sybase Datasource
This is an example of a Sybase datasource configuration with connection information, basic
security, and validation options.
Example Sybase Datasource Configuration
jdbc:sybase:Tds:localhost:5000/DATABASE?
JCONNECT_VERSION=6
sybase
admin
admin
true
false
com.sybase.jdbc4.jdbc.SybXADataSource
Example Sybase JDBC Driver module.xml File
Example Management CLI Commands
This example configuration can be achieved by using the following management CLI commands.
1. Add the Sybase JDBC driver as a core module.
module add --name=com.sybase --resources=/path/to/jconn4.jar -dependencies=javax.api,javax.transaction.api
2. Register the Sybase JDBC driver.
/subsystem=datasources/jdbc-driver=sybase:add(drivername=sybase,driver-module-name=com.sybase,driver-xa-datasourceclass-name=com.sybase.jdbc4.jdbc.SybXADataSource)
3. Add the Sybase datasource.
data-source add --name=SybaseDB --jndi-name=java:jboss/SybaseDB -driver-name=sybase --connectionurl=jdbc:sybase:Tds:localhost:5000/DATABASE?JCONNECT_VERSION=6 -user-name=admin --password=admin --validate-on-match=true -background-validation=false --valid-connection-checker-classname=org.jboss.jca.adapters.jdbc.extensions.sybase.SybaseValidCon
nectionChecker --exception-sorter-classname=org.jboss.jca.adapters.jdbc.extensions.sybase.SybaseExceptio
nSorter
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13.13.12. Example Sybase XA Datasource
This is an example of a Sybase XA datasource configuration with XA datasource properties, basic
security, and validation options.
Example Sybase XA Datasource Configuration
localhost
mydatabase
4100
Tds
sybase
false
admin
admin
true
false
com.sybase.jdbc4.jdbc.SybXADataSource
Example Sybase JDBC Driver module.xml File
Example Management CLI Commands
This example configuration can be achieved by using the following management CLI commands.
1. Add the Sybase JDBC driver as a core module.
module add --name=com.sybase --resources=/path/to/jconn4.jar -dependencies=javax.api,javax.transaction.api
2. Register the Sybase JDBC driver.
/subsystem=datasources/jdbc-driver=sybase:add(drivername=sybase,driver-module-name=com.sybase,driver-xa-datasourceclass-name=com.sybase.jdbc4.jdbc.SybXADataSource)
3. Add the Sybase XA datasource.
xa-data-source add --name=SybaseXADS --jndiname=java:jboss/SybaseXADS --driver-name=sybase --user-name=admin
--password=admin --validate-on-match=true --backgroundvalidation=false --background-validation=false --validconnection-checker-classname=org.jboss.jca.adapters.jdbc.extensions.sybase.SybaseValidCon
nectionChecker --exception-sorter-classname=org.jboss.jca.adapters.jdbc.extensions.sybase.SybaseExceptio
nSorter --same-rm-override=false --xa-datasource-properties=
{"ServerName"=>"localhost","DatabaseName"=>"mydatabase","PortNumb
er"=>"4100","NetworkProtocol"=>"Tds"}
13.13.13. Example MariaDB Datasource
This is an example of a MariaDB datasource configuration with connection information, basic
security, and validation options.
Example MariaDB Datasource Configuration
jdbc:mariadb://localhost:3306/jbossdb
mariadb
admin
admin
true
false
org.mariadb.jdbc.Driver
org.mariadb.jdbc.MySQLDataSource
Example MariaDB JDBC Driver module.xml File
Example Management CLI Commands
This example configuration can be achieved by using the following management CLI commands.
1. Add the MariaDB JDBC driver as a core module.
module add --name=org.mariadb --resources=/path/to/mariadb-javaclient-1.2.3.jar --dependencies=javax.api,javax.transaction.api
2. Register the MariaDB JDBC driver.
/subsystem=datasources/jdbc-driver=mariadb:add(drivername=mariadb,driver-module-name=org.mariadb,driver-xa-datasourceclass-name=org.mariadb.jdbc.MySQLDataSource, driver-classname=org.mariadb.jdbc.Driver)
3. Add the MariaDB datasource.
data-source add --name=MariaDBDS --jndi-name=java:jboss/MariaDBDS
--driver-name=mariadb --connectionurl=jdbc:mariadb://localhost:3306/jbossdb --user-name=admin -password=admin --validate-on-match=true --backgroundvalidation=false --valid-connection-checker-class-
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name=org.jboss.jca.adapters.jdbc.extensions.mysql.MySQLValidConne
ctionChecker --exception-sorter-classname=org.jboss.jca.adapters.jdbc.extensions.mysql.MySQLExceptionS
orter
13.13.14. Example MariaDB XA Datasource
This is an example of a MariaDB XA datasource configuration with XA datasource properties, basic
security, and validation options.
Example MariaDB XA Datasource Configuration
localhost
mariadbdb
mariadb
admin
admin
true
false
org.mariadb.jdbc.Driver
org.mariadb.jdbc.MySQLDataSource
Example MariaDB JDBC Driver module.xml File
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Example Management CLI Commands
This example configuration can be achieved by using the following management CLI commands.
1. Add the MariaDB JDBC driver as a core module.
module add --name=org.mariadb --resources=/path/to/mariadb-javaclient-1.2.3.jar --dependencies=javax.api,javax.transaction.api
2. Register the MariaDB JDBC driver.
/subsystem=datasources/jdbc-driver=mariadb:add(drivername=mariadb,driver-module-name=org.mariadb,driver-xa-datasourceclass-name=org.mariadb.jdbc.MySQLDataSource, driver-classname=org.mariadb.jdbc.Driver)
3. Add the MariaDB XA datasource.
xa-data-source add --name=MariaDBXADS --jndiname=java:jboss/MariaDBXADS --driver-name=mariadb --username=admin --password=admin --validate-on-match=true -background-validation=false --valid-connection-checker-classname=org.jboss.jca.adapters.jdbc.extensions.mysql.MySQLValidConne
ctionChecker --exception-sorter-classname=org.jboss.jca.adapters.jdbc.extensions.mysql.MySQLExceptionS
orter --xa-datasource-properties=
{"ServerName"=>"localhost","DatabaseName"=>"mariadbdb"}
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CHAPTER 14. CONFIGURING TRANSACTIONS
14.1. TRANSACTIONS SUBSYSTEM CONFIGURATION
14.1.1. Configuring the Transaction Manager
You can configure the transaction manager using the web-based management console or the
command line management CLI.
Configuring the Transaction Manager Using the Management Console
The following steps explain how to configure the transaction manager using the web-based
management console:
1. Select the Configuration tab from the top of the screen.
2. If you are running JBoss EAP as a managed domain, choose the desired profile to modify.
3. From the Subsystem list, select Transactions and click View.
4. Click Edit on the appropriate tab for the settings that you want to edit, such as Recovery for
recovery options.
5. Make the necessary changes and click Save to save the changes.
6. Click Need Help? to display help text.
Configuring the Transaction Manager Using the Management CLI
Using the management CLI, you can configure the transaction manager using a series of
commands. The commands all begin with /subsystem=transactions for a standalone server or
/profile=default/subsystem=transactions/ for the default profile in a managed
domain.
For a detailed listing of all the transaction manager configuration options, see the Transaction
Manager Configuration Options for JBoss EAP.
14.1.2. Configuring Your Datasource to Use JTA
This task shows you how to enable Java Transaction API (JTA) on your datasource.
Prerequisites
Your database must support Java Transaction API. If in doubt, consult the documentation for
your database.
Create a non-XA datasource.
Note
XA datasources are already JTA capable by default.
Configuring the Datasource to use Java Transaction API
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1. Use the following management CLI command to set the jta attribute to true.
/subsystem=datasources/data-source=DATASOURCE_NAME:writeattribute(name=jta,value=true)
Note
In a managed domain, precede this command with /profile=PROFILE_NAME.
2. Reload the server for the changes to take effect.
reload
Your datasource is now configured to use JTA.
14.1.3. About Transaction Log Messages
You can track the transaction status while keeping the log files readable by using the DEBUG log
level for the transaction logger. For detailed debugging, use the TRACE log level. Refer to
Configuring Logging for the Transaction Subsystem for information on configuring the transaction
logger.
Transaction Manager (TM) can generate a lot of logging information when configured to log in the
TRACE log level. Following are some of the most commonly-seen messages. This list is not
comprehensive, so you may see messages other than these.
Table 14.1. Transaction State Change
Transaction Begin
When a transaction begins, a method Begin of class
com.arjuna.ats.arjuna.coordinator.BasicAction is
executed and presented in the log with the message
BasicAction::Begin() for action-id .
Transaction Commit
When a transaction commits, a method Commit of class
com.arjuna.ats.arjuna.coordinator.BasicAction is
executed and presented in the log with the message
BasicAction::Commit() for action-id .
Transaction Rollback
When a transaction rolls back, a method Rollback of class
com.arjuna.ats.arjuna.coordinator.BasicAction is
executed and presented in the log with the message
BasicAction::Rollback() for action-id
.
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Transaction Timeout
When a transaction times out, a method doCancellations of
com.arjuna.ats.arjuna.coordinator.TransactionReap
er is executed and presented in log as Reaper Worker attempting to cancel . You will
then see the same thread rolling back the transaction as shown above.
14.1.4. Configuring Logging for the Transaction Subsystem
You can control the amount of information logged about transactions, independent of other logging
settings in JBoss EAP. You can configure the logging settings using the management console or the
management CLI.
Configuring the Transaction Logger Using the Management Console
1. Navigate to the Logging subsystem configuration.
a. In the management console, click the Configuration tab. If you use a managed
domain, you must first choose the appropriate server profile.
b. Select the Logging subsystem and click View.
2. Edit the com.arjuna attributes.
Select the Log Categories tab. The com.arjuna entry is already present. Select
com.arjuna and click Edit in the Attributes section. You can change the log level and
choose whether to use parent handlers or not.
Log Level:
The log level is WARN by default. Transactions can produce a large quantity of logging
output, hence the meaning of the standard logging levels is different for the transaction
logger. In general, messages tagged with levels at a lower severity than the chosen level
are discarded.
Use Parent Handlers:
Parent handler indicates whether the logger should send its output to its parent logger.
The default behavior is true.
3. Click Save to save the changes.
Configuring the Transaction Logger Using the Management CLI
Use the following command to set the logging level from the management CLI. For a standalone
server, remove the /profile=default from the command.
/profile=default/subsystem=logging/logger=com.arjuna:writeattribute(name=level,value=VALUE)
14.2. TRANSACTION ADMINISTRATION
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14.2.1. Browse and Manage Transactions
The management CLI supports the ability to browse and manipulate transaction records. This
functionality is provided by the interaction between the TM and the management API of JBoss EAP.
The TM stores information about each pending transaction and the participants involved the
transaction, in a persistent storage called the object store. The management API exposes the object
store as a resource called the log-store. An API operation called probe reads the transaction
logs and creates a node path for each record. You can call the probe command manually,
whenever you need to refresh the log-store. It is normal for transaction logs to appear and
disappear quickly.
Refresh the Log Store
This command refreshes the log store for server groups which use the profile default in a
managed domain. For a standalone server, remove the profile=default from the command.
/profile=default/subsystem=transactions/log-store=log-store/:probe
View All Prepared Transactions
To view all prepared transactions, first refresh the log store (see Refresh the Log Store), then run the
following command, which functions similarly to a file system ls command.
ls /profile=default/subsystem=transactions/log-store=logstore/transactions
Or
/host=master/server=server-one/subsystem=transactions/log-store=logstore:read-children-names(child-type=transactions)
Each transaction is shown, along with its unique identifier. Individual operations can be run against
an individual transaction (see Manage a Transaction).
14.2.1.1. Manage a Transaction
View the Attributes of a Transaction
To view information about a transaction, such as its JNDI name, EIS product name and version, or
its status, use the :read-resource management CLI command.
/profile=default/subsystem=transactions/log-store=logstore/transactions=0\:ffff7f000001\:-b66efc2\:4f9e6f8f\:9:read-resource
View the Participants of a Transaction
Each transaction log contains a child element called participants. Use the read-resource
management CLI command on this element to see the participants of the transaction. Participants
are identified by their JNDI names.
/profile=default/subsystem=transactions/log-store=logstore/transactions=0\:ffff7f000001\:b66efc2\:4f9e6f8f\:9/participants=java\:\/JmsXA:read-resource
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The result may look similar to this:
{
"outcome" => "success",
"result" => {
"eis-product-name" => "ActiveMQ",
"eis-product-version" => "2.0",
"jndi-name" => "java:/JmsXA",
"status" => "HEURISTIC",
"type" => "/StateManager/AbstractRecord/XAResourceRecord"
}
}
The outcome status shown here is in a HEURISTIC state and is eligible for recovery. See Recover a
Transaction for more details.
In special cases it is possible to create orphan records in the object store, that is
XAResourceRecords, which do not have any corresponding transaction record in the log. For
example, XA resource prepared but crashed before the TM recorded and is inaccessible for the
domain management API. To access such records you need to set management option exposeall-logs to true. This option is not saved in management model and is restored to false when
the server is restarted.
/profile=default/subsystem=transactions/log-store=log-store:writeattribute(name=expose-all-logs, value=true)
You can use this alternate command, which shows participant IDs of transaction in an aggregated
form.
/host=master/server=server-one/subsystem=transactions/log-store=logstore/transactions=0\:ffff7f000001\:-b66efc2\:4f9e6f8f\:9:readchildren-names(child-type=participants)
Delete a Transaction
Each transaction log supports a :delete operation, to delete the transaction log representing the
transaction.
/profile=default/subsystem=transactions/log-store=logstore/transactions=0\:ffff7f000001\:-b66efc2\:4f9e6f8f\:9:delete
Recover a Transaction
Each transaction participant supports recovery via the :recover management CLI command.
/profile=default/subsystem=transactions/log-store=logstore/transactions=0\:ffff7f000001\:b66efc2\:4f9e6f8f\:9/participants=2:recover
If the transaction’s status is HEURISTIC, the recovery operation changes the state to PREPARE
and triggers a recovery.
If one of the transaction’s participants is heuristic, the recovery operation tries to replay the
commit operation. If successful, the participant is removed from the transaction log. You can
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verify this by re-running the :probe operation on the log-store and checking that the
participant is no longer listed. If this is the last participant, the transaction is also deleted.
Refresh the status of a transaction which needs recovery
If a transaction needs recovery, you can use the :refresh management CLI command to be sure
it still requires recovery, before attempting the recovery.
/profile=default/subsystem=transactions/log-store=logstore/transactions=0\:ffff7f000001\:b66efc2\:4f9e6f8f\:9/participants=2:refresh
14.2.2. View Transaction Statistics
If transaction manager statistics are enabled, you can view statistics on processed transactions by
the transaction manager. See Configuring the Transaction Manager for information about how to
enable transaction manager statistics.
You can view statistics using either the management console or the management CLI. In the
management console, transaction statistics are available by navigating to the Transactions
subsystem from the Runtime tab. Not all statistics are available from the management console.
The following table shows each available statistic and its description.
Table 14.2. Transaction Subsystem Statistics
190
Statistic
Description
number-of-transactions
The total number of transactions processed by the transaction manager
on this server.
number-of-committedtransactions
The number of committed transactions processed by the transaction
manager on this server.
number-of-abortedtransactions
The number of aborted transactions processed by the transaction
manager on this server.
number-of-timed-outtransactions
The number of timed out transactions processed by the transaction
manager on this server. The number of timed out transactions is
calculated to number of aborted transactions too.
number-of-heuristics
Number of transactions in a heuristic state.
CHAPTER 14. CONFIGURING TRANSACTIONS
Statistic
Description
number-of-inflighttransactions
Number of transactions which have begun but not yet terminated.
number-of-applicationrollbacks
The number of failed transactions whose failure origin was an
application.
number-of-resourcerollbacks
The number of failed transactions whose failure origin was a resource.
14.2.3. Transactions Object Store
Transactions need a place to store objects. One of the options for object storage is a JDBC
datasource. Compared with a file store, the JDBC interface can access the database from any
system on the same network. If you use a file store, the disk must be shared or migrated before the
database can be accessed for object storage. If performance is a particular concern, the JDBC
object store can be slower than a file system or ActiveMQ journal object store.
Important
If the Transactions subsystem is configured to use Apache ActiveMQ Artemis journal as
storage type for transaction logs, then two instances of JBoss EAP are not permitted to
use the same directory for storing the journal. Application server instances can not share
the same location and each has to configure a unique location for it.
Use a JDBC Datasource as a Transactions Object Store
Follow the below steps to use a JDBC datasource as a transactions object store.
1. Create a datasource, for example, TransDS. For instructions, see Create a Non-XA
datasource.
2. Set the datasource’s jta attribute to false.
/subsystem=datasources/data-source=TransDS:writeattribute(name=jta, value=false)
3. Set the jdbc-store-datasource attribute to the JNDI name for the datasource to use,
for example, java:jboss/datasources/TransDS.
/subsystem=transactions:write-attribute(name=jdbc-store-datasource,
value=java:jboss/datasources/TransDS)
4. Set the use-jdbc-store attribute to true.
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/subsystem=transactions:write-attribute(name=use-jdbc-store,
value=true)
5. Reload the JBoss EAP server for the changes to take effect.
reload
The following table identifies all of the available attributes related to JDBC object storage.
Table 14.3. Transactions JDBC Store Attributes
192
Property
Description
use-jdbc-store
Set this to true to enable the JDBC store for transactions.
jdbc-store-datasource
The JNDI name of the JDBC datasource used for storage.
jdbc-action-store-drop-table
Whether to drop and recreate the action store tables at
launch. The default is false.
jdbc-action-store-table-prefix
The prefix for the action store table names.
jdbc-communication-store-drop-table
Whether to drop and recreate the communication store tables
at launch. The default is false.
jdbc-communication-store-table-prefix
The prefix for the communication store table names.
jdbc-state-store-drop-table
Whether to drop and recreate the state store tables at launch.
The default is false.
jdbc-state-store-table-prefix
The prefix for the state store table names.
CHAPTER 15. ORB CONFIGURATION
CHAPTER 15. ORB CONFIGURATION
15.1. ABOUT COMMON OBJECT REQUEST BROKER
ARCHITECTURE (CORBA)
Common Object Request Broker Architecture (CORBA) is a standard that enables applications and
services to work together even when they are written in multiple, otherwise-incompatible, languages
or hosted on separate platforms. CORBA requests are brokered by a server-side component called
an Object Request Broker (ORB). JBoss EAP provides an ORB instance, by means of the Open
JDK ORB component.
The ORB is used internally for Java Transaction Service (JTS) transactions, and is also available for
use by your own applications.
15.2. CONFIGURE THE ORB FOR JTS TRANSACTIONS
In a default installation of JBoss EAP, the ORB support for transactions is disabled. You can
configure ORB settings in the IIOP subsystem using the management CLI or the management
console.
Note
The IIOP subsystem is available when using a configuration full or full-ha profile in a
managed domain, or the standalone-ha.xml or standalone-full-ha.xml
configuration file for a standalone server.
Configure the ORB Using the Management CLI
You can configure each aspect of the ORB using the management CLI. This is the minimum
configuration for the ORB to be used with JTS.
The following management CLI commands are configured for a managed domain using the full
profile. If necessary, change the profile to suit the one you need to configure. If you are using a
standalone server, omit the /profile=full portion of the commands.
Enable the Security Interceptors
Enable the security attribute by setting the value to identity.
/profile=full/subsystem=iiop-openjdk:writeattribute(name=security,value=identity)
Enable Transactions in the IIOP Subsystem
To enable the ORB for JTS, set the value of transactions attribute to full, rather than the
default spec.
/profile=full/subsystem=iiop-openjdk:write-attribute(name=transactions,
value=full)
Enable JTS in the Transaction Subsystem
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/profile=full/subsystem=transactions:writeattribute(name=jts,value=true)
Note
For JTS activation, the server must be restarted as reload is not enough.
Configure the ORB Using the Management Console
1. Select the Configuration tab from the top of the management console.
2. Select Subsystems. In a managed domain, you will need to select the appropriate profile
first.
3. Select the IIOP subsystem and click View.
4. Click the Edit button and modify the attributes as needed. Click on the Need Help? link for
detailed explanations of each field.
5. Click Save to save the changes.
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CHAPTER 16. JAVA CONNECTOR ARCHITECTURE (JCA)
MANAGEMENT
16.1. ABOUT THE JAVA CONNECTOR ARCHITECTURE (JCA)
The Java EE Connector Architecture (JCA) defines a standard architecture for Java EE systems to
external heterogeneous Enterprise Information Systems (EIS). Examples of EISs include Enterprise
Resource Planning (ERP) systems, mainframe transaction processing (TP), databases, and
messaging systems. A resource adapter is a component that implements the Java EE Connector
API architecture. It is similar to a datasource object, however
JCA 1.7 provides features for managing:
connections
transactions
security
life-cycle
work instances
transaction inflow
message inflow
JCA 1.7 was developed under the Java Community Process as JSR-322.
16.2. ABOUT RESOURCE ADAPTERS
A resource adapter is a deployable Java EE component that provides communication between a
Java EE application and an Enterprise Information System (EIS) using the Java Connector
Architecture (JCA) specification. A resource adapter is often provided by EIS vendors to allow easy
integration of their products with Java EE applications.
An Enterprise Information System can be any other software system within an organization.
Examples include Enterprise Resource Planning (ERP) systems, database systems, e-mail servers
and proprietary messaging systems.
A resource adapter is packaged in a Resource Adapter Archive (RAR) file which can be deployed to
JBoss EAP. A RAR file may also be included in an Enterprise Archive (EAR) deployment.
16.3. CONFIGURING THE JCA SUBSYSTEM
The JCA subsystem controls the general settings for the JCA container and resource adapter
deployments. You can configure the JCA subsystem using the management console or the
management CLI.
The main JCA elements to configure are:
Archive validation
Bean validation
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Work managers
Bootstrap contexts
Cached connection manager
Configure JCA settings from the management console
The JCA subsystem can be configured from the management console by navigating to
Configuration → Subsystems → JCA. Then, select the appropriate tab:
Common Config - Contains settings for the cached connection manager, archive
validation, and bean validation. Each of these is contained in their own tab as well.
Modify these settings by opening the appropriate tab and clicking the Edit button.
Bootstrap Contexts - Contains the list of configured bootstrap contexts. New bootstrap
context objects can be added, removed, and configured. Each bootstrap context must be
assigned a work manager.
Work Manager - Contains the list of configured work managers. New work managers
can be added, removed, and their thread pools configured here. Each work manager can
have one short-running thread pool and an optional long-running thread pool.
The thread pool attributes can be configured by clicking View on the selected work
manager.
Configure JCA settings from the management CLI
The JCA subsystem can be configured from the management CLI from the
/subsystem=jca address. In a managed domain, you must precede the command with
/profile=PROFILE_NAME.
Archive Validation
This determines whether archive validation will be performed on the deployment units. The following
table describes the attributes you can set for archive validation.
Table 16.1. Archive Validation Attributes
Attribute
Default Value
Description
enabled
true
Specifies whether archive validation is enabled.
fail-on-error
true
Specifies whether an archive validation error report fails the
deployment.
fail-on-warn
false
Specifies whether an archive validation warning report fails
the deployment.
If an archive does not implement the JCA specification correctly and archive validation is enabled,
an error message will display during deployment describing the problem. For example:
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Severity: ERROR
Section: 19.4.2
Description: A ResourceAdapter must implement a "public int hashCode()"
method.
Code: com.mycompany.myproject.ResourceAdapterImpl
Severity: ERROR
Section: 19.4.2
Description: A ResourceAdapter must implement a "public boolean
equals(Object)" method.
Code: com.mycompany.myproject.ResourceAdapterImpl
If archive validation is not specified, it is considered present and the enabled attribute defaults to
true.
Bean Validation
This setting determines whether bean validation (JSR-303) will be performed on the deployment
units. The following table describes the attributes you can set for bean validation.
Table 16.2. Bean Validation Attributes
Attribute
Default Value
Description
enabled
true
Specifies whether bean validation is enabled.
If bean validation is not specified, it is considered present and the enabled attribute defaults to
true.
Work Managers
There are two types of work managers:
Default work manager
The default work manager and its thread pools.
Custom work manager
A custom work manager definition and its thread pools.
The following table describes the attributes you can set for work managers.
Table 16.3. Work Manager Attributes
Attribute
Description
name
Specifies the name of the work manager.
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Attribute
Description
short-running-threads
Thread pool for standard Work instances. Each work manager has one shortrunning thread pool.
long-running-threads
Thread pool for JCA 1.7 Work instances that set the LONG_RUNNING hint.
Each work manager can have one optional long-running thread pool.
The following table describes the attributes you can set for work manager thread pools.
Table 16.4. Thread Pool Attributes
Attribute
Default Value
Description
name
default
Specifies the name of the thread pool.
keepalive-time
10 seconds
Specifies the amount of time that pool threads should be kept
after doing work.
allow-coretimeout
false
Boolean setting that determines whether core threads may
time out. The default value is false.
thread-factory
Reference to the thread factory.
max-thread
50
The maximum thread pool size.
core-threads
50
The core thread pool size. This must be equal to or smaller
than the maximum thread pool size.
queue-length
50
The maximum queue length.
Bootstrap Contexts
This is used to define custom bootstrap contexts. The following table describes the attributes you
can set for bootstrap contexts.
Table 16.5. Bootstrap Context Attributes
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Attribute
Description
name
Specifies the name of the bootstrap context.
workmanager
Specifies the name of the work manager to use for this context.
Cached Connection Manager
This is used for debugging connections and supporting lazy enlistment of a connection in a
transaction, tracking whether they are used and released properly by the application. The following
table describes the attributes you can set for the cached connection manager.
Table 16.6. Cached Connection Manager Attributes
Attribute
Default Value
Description
debug
false
Outputs warning on failure to explicitly close connections.
error
false
Throws exception on failure to explicitly close connections.
ignore-unknownconnections
false
Specifies that unknown connections will not be cached.
16.4. CONFIGURING RESOURCE ADAPTERS
16.4.1. Deploy a Resource Adapter
Resource adapters can be deployed just like other deployments using the management CLI or the
management console. When running a standalone server, you can also copy the archive to the
deployments directory to be picked up by the deployment scanner.
Deploy a Resource Adapter using the Management CLI
To deploy the resource adapter to a standalone server, enter the following management CLI
command.
deploy /path/to/resource-adapter.rar
To deploy the resource adapter to all server groups in a managed domain, enter the following
management CLI command.
deploy /path/to/resource-adapter.rar --all-server-groups
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Deploy a Resource Adapter using the Management Console
1. Log in to the management console and click on the Deployments tab.
2. Click Add. In a managed domain, you will first need to select Content Repository.
3. Choose the Upload a new deployment option and click Next.
4. Browse to the resource adapter archive and click Next.
5. Verify the upload, then click Finish.
6. In a managed domain, assign the deployment to the appropriate server groups and enable
the deployment.
Deploy a Resource Adapter Using the Deployment Scanner
To deploy a resource adapter manually to a standalone server, copy the resource adapter archive to
the server deployments directory, for example, EAP_HOME/standalone/deployments/. This will
be picked up and deployed by the deployment scanner.
Note
This option is not available for managed domains. You must use either the management
console or the management CLI to deploy the resource adapter to server groups.
16.4.2. Configure a Resource Adapter
You can configure resource adapters using the management interfaces. The below example shows
how to configure a resource adapter using the management CLI. See your resource adapter
vendor’s documentation for supported properties and other important information.
Add the Resource Adapter Configuration
Add the resource adapter configuration.
/subsystem=resource-adapters/resourceadapter=eis.rar:add(archive=eis.rar, transaction-support=XATransaction)
Configure the Resource Adapter Settings
Configure any of the following settings as necessary.
Configure config-properties.
Add the server configuration property.
/subsystem=resource-adapters/resource-adapter=eis.rar/configproperties=server:add(value=localhost)
Add the port configuration property.
/subsystem=resource-adapters/resource-adapter=eis.rar/configproperties=port:add(value=9000)
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Configure admin-objects.
Add an admin object.
/subsystem=resource-adapters/resource-adapter=eis.rar/adminobjects=aoName:add(class-name=com.acme.eis.ra.EISAdminObjectImpl,
jndi-name=java:/eis/AcmeAdminObject)
Configure an admin object configuration property.
/subsystem=resource-adapters/resource-adapter=eis.rar/adminobjects=aoName/config-properties=threshold:add(value=10)
Configure connection-definitions.
Add a connection definition for a managed connection factory.
/subsystem=resource-adapters/resource-adapter=eis.rar/connectiondefinitions=cfName:add(classname=com.acme.eis.ra.EISManagedConnectionFactory, jndiname=java:/eis/AcmeConnectionFactory)
Configure a managed connection factory configuration property.
/subsystem=resource-adapters/resource-adapter=eis.rar/connectiondefinitions=cfName/config-properties=name:add(value=Acme Inc)
Configure whether to record the enlistment trace. You can disable the recording of enlistment
traces by setting the enlistment-trace attribute to false.
/subsystem=resource-adapters/resource-adapter=eis.rar/connectiondefinitions=cfName:write-attribute(name=enlistmenttrace,value=false)
Warning
Disabling the enlistment trace will make tracking down errors during transaction
enlistment more difficult.
See Resource Adapter Attributes for all available configuration options for resource adapters.
Activate the Resource Adapter
Activate the resource adapter.
/subsystem=resource-adapters/resource-adapter=eis.rar:activate
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Note
You can also define capacity policies for resource adapters. For more details, see the
Capacity Policies section.
16.4.3. Deploy and Configure the Websphere MQ Resource Adapter
You can find the instructions for deploying the Websphere MQ resource adapter in Configuring
Messaging for JBoss EAP.
16.4.4. Deploy and Configure the Generic JMS Resource Adapter
You can find the instructions for configuring the generic JMS resource adapter in Configuring
Messaging for JBoss EAP.
16.5. CONFIGURE MANAGED CONNECTION POOLS
JBoss EAP provides three implementations of the ManagedConnectionPool interface.
org.jboss.jca.core.connectionmanager.pool.mcp.SemaphoreConcurrentLinkedQu
eueManagedConnectionPool
This is the default connection pool in JBoss EAP 7 and provides the best out-of-the-box
performance.
org.jboss.jca.core.connectionmanager.pool.mcp.SemaphoreArrayListManagedCo
nnectionPool
This was the default connection pool in previous JBoss EAP versions.
org.jboss.jca.core.connectionmanager.pool.mcp.LeakDumperManagedConnection
Pool
This connection pool is used for debugging purposes only and will report any leaks upon
shutdown or when the pool is flushed.
You can set the managed connection pool implementation for a datasource using the following
management CLI command.
/subsystem=datasources/data-source=DATA_SOURCE:writeattribute(name=mcp,value=MCP_CLASS)
You can set the managed connection pool implementation for a resource adapter using the
following management CLI command.
/subsystem=resource-adapters/resourceadapter=RESOURCE_ADAPTER/connectiondefinitions=CONNECTION_DEFINITION:writeattribute(name=mcp,value=MCP_CLASS)
You can set the managed connection pool implementation for a messaging server using the
following management CLI command.
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/subsystem=messaging-activemq/server=SERVER/pooled-connectionfactory=CONNECTION_FACTORY:write-attribute(name=managed-connectionpool,value=MCP_CLASS)
16.6. VIEW CONNECTION STATISTICS
You can read statistics for a defined connection from the /deployment=NAME.rar subtree. This is
so that you can access statistics for any RAR, even if it not defined in a standalone.xml or
domain.xml configuration.
/deployment=NAME.rar/subsystem=resourceadapters/statistics=statistics/connectiondefinitions=java\:\/testMe:read-resource(include-runtime=true)
Note
Be sure to specify the include-runtime=true argument, as all statistics are runtimeonly information.
See Resource Adapter Statistics for information on the available statistics.
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CHAPTER 17. CONFIGURING THE WEB SERVER
(UNDERTOW)
17.1. UNDERTOW SUBSYSTEM OVERVIEW
Important
In JBoss EAP 7, the Undertow subsystem takes the place of the Web subsystem from
previous versions of JBoss EAP.
The Undertow subsystem allows you to configure the web server and servlet container settings. It
implements the Java Servlet 3.1 Specification as well as websockets and supports HTTP Upgrade
and using high performance non-blocking handlers in servlet deployments. The Undertow
subsystem also has the ability to act as a high performance reverse proxy which supports
mod_cluster.
Within the Undertow subsystem, there are five main components to configure:
buffer caches
server
servlet container
handlers
filters
Note
While JBoss EAP does offer the ability to update the configuration for each of these
components, the default configuration is suitable for most use cases and provides
reasonable performance settings.
Default Undertow Subsystem Configuration
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Important
The Undertow subsystem also relies on the IO subsystem to provide XNIO workers and
buffer pools. The IO subsystem is configured separately and provides a default
configuration which should give optimal performance in most cases.
Note
Compared to the web subsystem in previous JBoss EAP releases, the Undertow
subsystem in JBoss EAP 7 has different default behaviors of HTTP methods.
17.2. CONFIGURING BUFFER CACHES
The buffer cache is used to cache static resources. JBoss EAP enables multiple caches to be
configured and referenced by deployments, allowing different deployments to use different cache
sizes. Buffers are allocated in regions and are a fixed size. The total amount of space used can be
calculated by multiplying the buffer size by the number of buffers per region by the maximum
number of regions. The default size of a buffer cache is 10MB.
JBoss EAP provides a single cache by default:
Default Undertow Subsystem Configuration
Updating an Existing Buffer Cache
To update an existing buffer cache:
/subsystem=undertow/buffer-cache=default/:write-attribute(name=buffersize,value=2048)
reload
Creating a New Buffer Cache
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To create a new buffer cache:
/subsystem=undertow/buffer-cache=new-buffer:add
Deleting a Buffer Cache
To delete a buffer cache:
/subsystem=undertow/buffer-cache=new-buffer:remove
reload
For a full list of the attributes available for configuring buffer caches, please see the Undertow
Subsystem Attributes section.
17.3. CONFIGURING A SERVER
A server represents an instance of Undertow and consists of several elements:
host
http-listener
https-listener
ajp-listener
The host element provides a virtual host configuration while the three listeners provide connections
of that type to the Undertow instance.
Note
Multiple servers may be configured, which allow deployments and servers to be
completely isolated. This may be useful in certain scenarios such as multi-tenant
environments
JBoss EAP provides a server by default:
Default Undertow Subsystem Configuration
...
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Updating an Existing Server
To update an existing server:
/subsystem=undertow/server=default-server:write-attribute(name=defaulthost,value=default-host)
reload
Creating a New Server
To create a new server:
/subsystem=undertow/server=new-server:add
reload
Deleting a Server
To delete a server:
/subsystem=undertow/server=new-server:remove
reload
For a full list of the attributes available for configuring servers, see the Undertow Subsystem
Attributes section.
17.4. CONFIGURING A SERVLET CONTAINER
A servlet container provides all servlet, JSP and websocket-related configuration, including sessionrelated configuration. While most servers will only need a single servlet container, it is possible to
configure multiple servlet containers by adding an additional servlet-container element. Having
multiple servlet containers enables behavior such as allowing multiple deployments to be deployed
to the same context path on different virtual hosts.
Note
Much of the configuration provided in by servlet container can be individually overridden
by deployed applications using their web.xml file.
JBoss EAP provides a servlet container by default:
Default Undertow Subsystem Configuration
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...
...
Updating an Existing Servlet Container
To update an existing servlet container:
/subsystem=undertow/servlet-container=default:writeattribute(name=ignore-flush,value=true)
reload
Creating a New Servlet Container
To create a new servlet container:
/subsystem=undertow/servlet-container=new-servlet-container:add
reload
Deleting a Servlet Container
To delete a servlet container:
/subsystem=undertow/servlet-container=new-servlet-container:remove
reload
For a full list of the attributes available for configuring servlet containers, see the Undertow
Subsystem Attributes section.
17.5. CONFIGURING HANDLERS
JBoss EAP allows for two types of handlers to be configured:
file handlers
reverse-proxy handlers
File handlers serve static files. Each file handler must be attached to a location in a virtual host.
Reverse-proxy handlers allow JBoss EAP to server as a high performance reverse-proxy. It can
handle AJP, HTTP, and HTTP.2 backends and supports mod_cluster.
JBoss EAP provides a file handler by default:
Default Undertow Subsystem Configuration
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...
...
...
Using WebDAV for Static Resources
Previous versions of JBoss EAP allowed for using WebDAV with the Web subsystem (via the
WebdavServlet) to host static resources and enable additional HTTP methods for accessing and
manipulating those files. In JBoss EAP 7, the Undertow subsystem does provide a mechanism for
serving static files via a file handler, but the Undertow subsystem does not support WebDAV. If you
would like to use WebDAV with JBoss EAP 7, you may write a custom WebDAV servlet.
Updating an Existing File Handler
To update an existing file handler:
/subsystem=undertow/configuration=handler/file=welcome-content:writeattribute(name=case-sensitive,value=true)
reload
Creating a New File Handler
To create a new file handler:
/subsystem=undertow/configuration=handler/file=new-file-handler:add
Deleting a File Handler
To delete a file handler
/subsystem=undertow/configuration=handler/file=new-file-handler:remove
reload
For a full list of the attributes available for configuring handlers, see the Undertow Subsystem
Attributes section.
17.6. CONFIGURING FILTERS
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A filter enables some aspect of a request to be modified and can use predicates to control when a
filter executes. Some common use cases for filters include setting headers or doing GZIP
compression.
Note
A filter is functionally equivalent to a global valve used in previous versions of JBoss EAP.
The following types of filters can be defined:
custom-filter
error-page
expression-filter
gzip
mod-cluster
request-limit
response-header
rewrite
JBoss EAP provides two filters by default:
Default Undertow Subsystem Configuration
...
...
...
Updating an Existing Filter
To update an existing filter:
/subsystem=undertow/configuration=filter/response-header=serverheader:write-attribute(name=header-value,value="JBoss-EAP")
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reload
Creating a New Filter
To create a new filter:
/subsystem=undertow/configuration=filter/response-header=new-responseheader:add(header-name=new-response-header,header-value="My Value")
Deleting a Filter
To delete a filter:
/subsystem=undertow/configuration=filter/response-header=new-responseheader:remove
reload
For a full list of the attributes available for configuring filters, see the Undertow Subsystem Attributes
section.
17.7. CONFIGURE THE DEFAULT WELCOME WEB APPLICATION
JBoss EAP includes a default Welcome application, which displays at the root context on port 8080
by default.
There is a default server preconfigured in Undertow that serves up the welcome content.
Default Undertow Subsystem Configuration
...
...
...
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The default server (default-server) has a default host (default-host) configured. The
default host is configured to handle requests to the server’s root, using the element,
with the welcome-content file handler. The welcome-content handler serves up the content in
the location specified in the path property.
This default Welcome application can be replaced with your own web application. This can be
configured in one of two ways:
By changing the welcome-content file handler
By changing the default-web-module
You can also disable the welcome content.
Changing the welcome-content File Handler
Modify the existing welcome-content file handler’s path to point to the new deployment.
/subsystem=undertow/configuration=handler/file=welcome-content:writeattribute(name=path,value="/path/to/content")
Note
Alternatively, you could create a different file handler to be used by the server’s root.
/subsystem=undertow/configuration=handler/file=NEW_FILE_HANDLER:
add(path="/path/to/content")
/subsystem=undertow/server=default-server/host=defaulthost/location=\/:writeattribute(name=handler,value=NEW_FILE_HANDLER)
Reload the server for the changes to take effect.
reload
Changing the default-web-module
Map a deployed web application to the server’s root.
/subsystem=undertow/server=default-server/host=default-host:writeattribute(name=default-web-module,value=hello.war)
Reload the server for the changes to take effect.
reload
Disabling the Default Welcome Web Application
Disable the welcome application by removing the location entry (/) for the default-host.
/subsystem=undertow/server=default-server/host=defaulthost/location=\/:remove
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Reload the server for the changes to take effect.
reload
17.8. CONFIGURING HTTPS
For more details on configuring HTTPS for use with both web applications as well as the
management interfaces please see the How to Configure Server Security Guide.
17.9. CONFIGURING HTTP SESSION TIMEOUT
The HTTP session timeout defines the period of inactive time needed to declare an HTTP session
invalid. For example, a user accesses an application deployed to JBoss EAP which creates an
HTTP session. If that user then attempts to access that application again after the HTTP session
timeout, the original HTTP session will be invalidated and the user will be forced to create a new
HTTP session. This may result in the loss of unpersisted data or the user having to re-authenticate.
The HTTP session timeout is configured in an application’s web.xml file, but a default HTTP
session timeout can be specified within JBoss EAP. The server’s timeout value will apply to all
deployed applications, but an application’s web.xml will override the server’s value.
The server value is specified in the default-session-timeout property which is found in the servletcontainer section of the Undertow subsystem. The value of default-session-timeout is specified in
minutes and the default 30.
Configuring the Default Session Timeout
To configure the default-session-timeout:
/subsystem=undertow/servlet-container=default:writeattribute(name=default-session-timeout, value=60)
reload
Important
Changing the HTTP session timeout requires that all affected JBoss EAP instances be
restarted. Until that is done, the original HTTP session timeout value applies.
17.10. CONFIGURING HTTP-ONLY SESSION MANAGEMENT
COOKIES
Session management cookies can be accessed by both HTTP APIs and non-HTTP APIs such as
JavaScript. JBoss EAP offers the ability to send the HttpOnly header as part of the Set-Cookie
response header to the client, usually a browser. In supported browsers, enabling this header tells
the browser that it should prevent accessing session management cookies through non-HTTP APIs.
Restricting session management cookies to only HTTP APIs can help to mitigate the threat of
session cookie theft via cross-site scripting attacks. To enable this behavior, the http-only attribute
should be set to true.
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Important
Using the HttpOnly header does not actually prevent cross-site scripting attacks by itself,
it merely notifies the browser. The browser must also support HttpOnly for this behavior to
take affect.
Important
Using the http-only attribute only applies the restriction to session management cookies
and not other browser cookies.
The http-only attribute is set in two places in the Undertow subsystem:
In the servlet container as a session cookie setting
In the host section of the server as a single sign-on property
Configuring host-only for the Servlet Container Session Cookie
To configure the host-only property for the servlet container session cookie:
/subsystem=undertow/servlet-container=default/setting=sessioncookie:add
/subsystem=undertow/servlet-container=default/setting=sessioncookie:write-attribute(name=http-only,value=true)
reload
Configuring host-only for the Host Single Sign-On
To configure the host-only property for the host single sign-on:
/subsystem=undertow/server=default-server/host=defaulthost/setting=single-sign-on:add
/subsystem=undertow/server=default-server/host=defaulthost/setting=single-sign-on:write-attribute(name=http-only,value=true)
reload
17.11. CONFIGURING HTTP/2
Undertow allows for the use of the HTTP/2 standard, which reduces latency by compressing
headers and multiplexing many streams over the same TCP connection. It also provides the ability
for a server to push resources to the client before it has requested them, leading to faster page
loads. Undertow is also compatible with SPDY, the predecessor to HTTP/2, in order to support
clients that have not yet updated to the new specification.
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Important
HTTP/2 is supported as technical preview only for JBoss EAP 7.0 and will only work with
browsers that also support the HTTP/2 standard.
Important
Using HTTP/2 requires the use of Java 8 as well as setting up ALPN on the classpath.
This is due to the fact that HTTP/2 requires a TLS stack that supports ALPN, which is not
provided by the default installation of Java 8.
17.11.1. Configuring Undertow to use HTTP/2
To configure Undertow to use HTTP/2, the following must be done:
Configure Undertow to use HTTPS
Please see the How to Configure Server Security Guide for configuring Undertow to use HTTPS for
web applications.
Note
It is possible to use HTTP/2 without using HTTPS, in other words, only plain HTTP using
HTTP upgrade. In that case, you do not need to install ALPN and can simply enable
HTTP/2 in Undertow:
/subsystem=undertow/server=default-server/httplistener=default:write-attribute(name=enable-http2,value=true)
Download the ALPN JAR
Start by determining the specific version of Java you have. Run the following command from the
terminal to print the version of Java you have installed:
java -version
Based on your version, consult this page to determine the correct version of the ALPN JAR to
download from this page. For example, if you were running Java version 1.8.0_51, you would use
ALPN version 8.1.4.v20150727 and download alpn-boot-8.1.4.v20150727.jar.
Add the ALPN JAR to the Boot Classpath
Once you have downloaded the correct version of the ALPN JAR, copy it to EAP_HOME/bin. You
also must add the following to bin/standalone.conf (or bin/domain.conf if running in a
managed domain) replacing $JBOSS_HOME and $ALPN_VERSION with the appropriate values.
JAVA_OPTS="$JAVA_OPTS -Xbootclasspath/p:$JBOSS_HOME/bin/alpn-boot$ALPN_VERSION.jar"
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Important
You must restart JBoss EAP for the classpath changes to take affect.
Enable HTTP/2 in the HTTPS Listener
To enable the HTTPS listener in Undertow to use HTTP/2, you must set the enable-http2 attribute to
true:
/subsystem=undertow/server=default-server/https-listener=https:writeattribute(name=enable-http2,value=true)
Verify HTTP/2 is Being Used
To verify that Undertow is using HTTP/2, you will need to inspect the headers coming from
Undertow. Navigate to your JBoss EAP instance using https, for example https://localhost:8443, and
use your browser’s developer tools to inspect the headers. Some browsers, for example Google
Chrome, will show HTTP/2 pseudo headers (:path, :authority, :method and :scheme) when using
HTTP/2, while other browsers, for example Firefox and Safari, will report the status or version of the
header as HTTP/2.0.
17.12. CONFIGURING A REQUESTDUMPING HANDLER
The RequestDumping handler (io.undertow.server.handlers.RequestDumpingHandler) logs the
details of a request and corresponding response objects handled by Undertow within JBoss EAP.
Important
While this handler can be useful for debugging, it may also log sensitive information.
Please keep this in mind when enabling this handler.
Note
The RequestDumping handler replaces the RequestDumperValve from previous versions
of JBoss EAP.
You can configure a RequestDumping handler at either at the server level directly in JBoss EAP or
within an individual application.
17.12.1. Configuring a RequestDumping Handler on the Server
A RequestDumping handler should be configured as an expression filter. To configure a
RequestDumping handler as an expression filter, you need to do the following:
Create a new Expression Filter with the RequestDumping Handler
/subsystem=undertow/configuration=filter/expressionfilter=requestDumperExpression:add(expression="dump-request")
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Enable the Expression Filter in the Undertow Web Server
/subsystem=undertow/server=default-server/host=default-host/filterref=requestDumperExpression:add
Important
All requests and corresponding responses handled by the Undertow web server will be
logged when enabling the RequestDumping handler as a expression filter in this manner.
Configuring a RequestDumping Handler for Specific URLs
In addition to logging all requests, you can also use an expression filter to only log requests and
corresponding responses for specific URLs. This can be accomplished using a predicate in your
expression such as path, path-prefix, or path-suffix. For example, if you want to log all requests and
corresponding responses to /myApplication/test, you can use the expression
"path(/myApplication/test) → dump-request" instead of the expression "dumprequest" when creating your expression filter. This will only direct requests with a path exactly
matching /myApplication/test to the RequestDumping handler.
17.12.2. Configuring a RequestDumping Handler within an Application
In addition to configuring a RequestDumping handler at the server, you can also configure it within
individual applications. This will limit the scope of the handler to only that specific application. A
RequestDumping handler should be configured in WEB-INF/undertow-handlers.conf.
To configure the RequestDumping handler in WEB-INF/undertow-handlers.conf to log all
requests and corresponding responses for this application, add the following expression to WEBINF/undertow-handlers.conf:
Example WEB-INF/undertow-handlers.conf
dump-request
To configure the RequestDumping handler in WEB-INF/undertow-handlers.conf to only log
requests and corresponding responses to specific URLs within this application, you can use a
predicate in your expression such as path, path-prefix, or path-suffix. For example, to log all
requests and corresponding responses to test in your application, the following expression with the
path predicate could be used:
Example WEB-INF/undertow-handlers.conf
path(/test) -> dump-request
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Note
When using the predicates such as path, path-prefix, or path-suffix in expressions defined
in the application’s WEB-INF/undertow-handlers.conf, the value used will be
relative to the context root of the application. For example, if the application’s context root
is myApplication with an expression path(/test) → dump-request configured in
WEB-INF/undertow-handlers.conf, it will only log requests and corresponding
responses to /myApplication/test.
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CHAPTER 18. CONFIGURING REMOTING
18.1. ABOUT THE REMOTING SUBSYSTEM
The Remoting subsystem allows you to configure inbound and outbound connections for local and
remote services as well as the settings for those connections.
JBoss Remoting includes the following configurable elements: the endpoint, connectors, and a
series of local and remote connection URIs. This topic presents an explanation of each configurable
item, example CLI commands for how to configure each item, and an XML example of a fullyconfigured subsystem. This configuration only applies to the server. Most people will not need to
configure the Remoting subsystem at all, unless they use custom connectors for their own
applications. Applications which act as Remoting clients, such as EJBs, need separate configuration
to connect to a specific connector.
Default Remoting Subsystem Configuration
The Remoting Endpoint
The Remoting endpoint uses the XNIO worker declared and configured by the IO subsystem.
For details on how to configure the remoting endpoint, see Configuring the Endpoint.
For a full list of attributes available for the remoting endpoint, see Endpoint Attributes
Connector
The connector is the main remoting configuration element. Multiple connectors are allowed. Each
connector consists of a element with several sub-elements, and few other attributes.
The default connector is used by several subsystems of JBoss EAP. Specific settings for the
elements and attributes of your custom connectors depend on your applications. Contact Red Hat
Global Support Services for more information.
For details on how to configure connectors, see Configuring a Connector
For a full list of attributes available for connectors, see Connector Attributes
Outbound Connections
You can specify three different types of outbound connection:
Outbound connection to a URI.
Local outbound connection, which connects to a local resource such as a socket.
Remote outbound connection, which connects to a remote resource and authenticates using a
security realm.
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All of the outbound connections are enclosed in an element. Each of
these connection types takes an outbound-socket-binding-ref attribute. The outboundconnection element takes a uri attribute. The remote-outbound-connection takes optional
username and security-realm attributes to use for authorization.
For details on how to configure an outbound connections, see Configuring an Outbound Connection;
Configuring a Local Outbound Connection; Configuring a Remote Outbound Connection.
For a full list of outbound connection attributes and elements, see Outbound Connection Attributes
Configuration Outside the Remoting Subsystem
There are a few configuration aspects which are outside of the Remoting subsystem:
IO Worker: Use the following command to set the IO worker for remoting:
/subsystem=remoting/configuration=endpoint:writeattribute(name=worker, value=WORKER_NAME)
For details on how to configure an IO worker, see Configuring a Worker.
Network interface: The network interface used by the Remoting subsystem is the public
interface defined in the domain/configuration/domain.xml or
standalone/configuration/standalone.xml.
The per-host definition of the public interface is defined in the host.xml in the same directory
as the domain.xml or standalone.xml. This interface is also used by several other
subsystems. Exercise caution when modifying it.
Socket binding: The default socket-binding used by the Remoting subsystem binds to TCP port
4447.
For more information about socket binding and socket binding groups, see Socket Bindings in
the JBoss EAP Configuration Guide.
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Remoting connector reference for EJB: The EJB subsystem contains a reference to the remoting
connector for remote method invocations. The following is the default configuration:
Updating the Existing Endpoint Configuration
/subsystem=remoting/configuration=endpoint:writeattribute(name=authentication-retries,value=2)
reload
Creating a New Endpoint Configuration
/subsystem=remoting/configuration=endpoint:add
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Deleting an Endpoint Configuration
/subsystem=remoting/configuration=endpoint:remove
reload
For a full list of the attributes available for the endpoint configuration, please see the Remoting
Subsystem Attributes section.
18.3. CONFIGURING A CONNECTOR
The connector is the main configuration element relating to remoting and contains several subelements for additional configuration.
Updating the Existing Connector Configuration
/subsystem=remoting/connector=new-connector:writeattribute(name=socket-binding,value=my-socket-binding)
reload
Creating a New Connector
/subsystem=remoting/connector=new-connector:add(socket-binding=mysocket-binding)
Deleting a Connector
/subsystem=remoting/connector=new-connector:remove
reload
For a full list of the attributes available for configuring a connector, please see the Remoting
Subsystem Attributes section.
18.4. CONFIGURING AN HTTP CONNECTOR
The HTTP connector provides the configuration for the HTTP upgrade-based remoting connector.
JBoss EAP provides the following http-connector configuration by default.
...
By default, this HTTP connector connects to an HTTP listener named default that is configured in
the Undertow subsystem. For more information, see Configuring the Web Server (Undertow).
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Updating the Existing HTTP Connector Configuration
/subsystem=remoting/http-connector=new-connector:writeattribute(name=connector-ref,value=new-connector-ref)
reload
Creating a New HTTP Connector
/subsystem=remoting/http-connector=new-connector:add(connectorref=default)
Deleting an HTTP Connector
/subsystem=remoting/http-connector=new-connector:remove
reload
For a full list of the attributes available for configuring an HTTP connector, see the Remoting
Subsystem Attributes section.
18.5. CONFIGURING AN OUTBOUND CONNECTION
An outbound connection is a generic remoting outbound connection that is fully specified by a URI.
Updating an Existing Outbound Connection
/subsystem=remoting/outbound-connection=new-outbound-connection:writeattribute(name=uri,value=http://example.com)
reload
Creating a New Outbound Connection
/subsystem=remoting/outbound-connection=new-outboundconnection:add(uri=http://example.com)
Deleting an Outbound Connection
/subsystem=remoting/outbound-connection=new-outbound-connection:remove
reload
For a full list of the attributes available for configuring an outbound connection, please see the
Remoting Subsystem Attributes section.
18.6. CONFIGURING A REMOTE OUTBOUND CONNECTION
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A remote outbound connection is specified by a protocol, an outbound socket binding, a username
and a security realm. The protocol can be either remote, http-remoting or https-remoting.
Updating an Existing Remote Outbound Connection
/subsystem=remoting/remote-outbound-connection=new-remote-outboundconnection:write-attribute(name=outbound-socket-bindingref,value=outbound-socket-binding)
reload
Creating a New Remote Outbound Connection
/subsystem=remoting/remote-outbound-connection=new-remote-outboundconnection:add(outbound-socket-binding-ref=outbound-socket-binding)
Deleting a Remote Outbound Connection
/subsystem=remoting/remote-outbound-connection=new-remote-outboundconnection:remove
reload
For a full list of the attributes available for configuring a remote outbound connection, see the
Remoting Subsystem Attributes section.
18.7. CONFIGURING A LOCAL OUTBOUND CONNECTION
A local outbound connection is a remoting outbound connection with a protocol of local, specified
only by an outbound socket binding.
Updating an Existing Local Outbound Connection
/subsystem=remoting/local-outbound-connection=new-local-outboundconnection:write-attribute(name=outbound-socket-bindingref,value=outbound-socket-binding)
reload
Creating a New Local Outbound Connection
/subsystem=remoting/local-outbound-connection=new-local-outboundconnection:add(outbound-socket-binding-ref=outbound-socket-binding)
Deleting a Local Outbound Connection
/subsystem=remoting/local-outbound-connection=new-local-outboundconnection:remove
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reload
For a full list of the attributes available for configuring a local outbound connection, please see the
Remoting Subsystem Attributes section.
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CHAPTER 19. CONFIGURING THE IO SUBSYSTEM
19.1. IO SUBSYSTEM OVERVIEW
The IO subsystem defines the XNIO workers and buffer pools used by other subsystems, such as
Undertow and Remoting. These workers and buffer pools are defined within the following
components in the IO subsystem:
Default IO Subsystem Configuration
19.2. CONFIGURING A WORKER
Workers are XNIO worker instances. An XNIO worker instance is an abstraction layer for the Java
NIO APIs, which provide functionality such as management of IO and worker threads as well as
SSL support. By default, JBoss EAP provides single worker called default, but more can be
defined.
Updating an Existing Worker
To update an existing worker:
/subsystem=io/worker=default:write-attribute(name=io-threads,value=10)
reload
Creating a New Worker
To create a new worker:
/subsystem=io/worker=newWorker:add
Deleting a Worker
To delete a worker:
/subsystem=io/worker=newWorker:remove
reload
For a full list of the attributes available for configuring workers, please see the IO Subsystem
Attributes section.
19.3. CONFIGURING A BUFFER POOL
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Buffer Pools are pooled NIO buffer instances.
Important
Changing the buffer size has a big impact on application performance. For most servers,
the ideal size is usually 16k.
Updating an Existing Buffer Pool
To update an existing buffer pool:
/subsystem=io/buffer-pool=default:write-attribute(name=directbuffers,value=true)
reload
Creating a Buffer Pool
To create a new buffer pool:
/subsystem=io/buffer-pool=newBuffer:add
Deleting a Buffer Pool
To delete a buffer pool:
/subsystem=io/buffer-pool=newBuffer:remove
reload
For a full list of the attributes available for configuring buffer pools, please see the IO Subsystem
Attributes section.
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CHAPTER 20. CONFIGURING BATCH APPLICATIONS
JBoss EAP 7 introduced support for Java batch applications as defined by JSR-352. You can
configure an environment for running batch applications and manage batch jobs using the Batch
subsystem.
For information on developing batch applications, see Java Batch Application Development in the
JBoss EAP Development Guide.
20.1. CONFIGURING BATCH JOBS
You can configure settings for batch jobs using the Batch subsystem, which is based on the JBeret
implementation.
The default Batch subsystem configuration defines an in-memory job repository and default thread
pool settings.
By default, any batch jobs stopped during a server suspend will be restarted upon server resume.
You can set the restart-jobs-on-resume property to false to leave jobs in the STOPPED state
instead.
/subsystem=batch-jberet:write-attribute(name=restart-jobs-onresume,value=false)
You can also configure the settings for batch job repositories and thread pools.
20.1.1. Configure Batch Job Repositories
This section shows you how to configure in-memory and JDBC job repositories for storing batch job
information using the management CLI. You can also configure job repositories using the
management console by navigating to the Batch subsystem from the Configuration tab and
selecting either In Memory or JDBC from the left-hand menu.
Add an In-memory Job Repository
You can add a job repository that stores batch job information in memory.
/subsystem=batch-jberet/in-memory-job-repository=REPOSITORY_NAME:add
Add a JDBC Job Repository
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You can add a job repository that stores batch job information in a database. You must specify the
data-source to connect to the database.
/subsystem=batch-jberet/jdbc-job-repository=REPOSITORY_NAME:add(datasource=java:jboss/datasources/DATASOURCE)
Set a Default Job Repository
You can set an in-memory or JDBC job repository as the default job repository for batch
applications.
/subsystem=batch-jberet:write-attribute(name=default-jobrepository,value=REPOSITORY_NAME)
This will require a server reload.
reload
20.1.2. Configure Batch Thread Pools
This section shows you how to configure thread pools and thread factories to be used for batch jobs
using the management CLI. You can also configure thread pools and thread factories using the
management console by navigating to the Batch subsystem from the Configuration tab and
selecting Thread Pools or Thread Factories from the left-hand menu.
Configure a Thread Pool
When adding a thread pool, you must specify the max-threads, which should always be greater
than 3 as two threads are reserved to ensure partition jobs can execute as expected.
1. Add a thread pool.
/subsystem=batch-jberet/thread-pool=THREAD_POOL_NAME:add(maxthreads=10)
2. If desired, set a keepalive-time value.
/subsystem=batch-jberet/thread-pool=THREAD_POOL_NAME:writeattribute(name=keepalive-time,value={time=60,unit=SECONDS})
Use a Thread Factory
1. Add a thread factory.
/subsystem=batch-jberet/thread-factory=THREAD_FACTORY_NAME:add
2. Configure the desired attributes for the thread factory.
group-name - The name of a thread group to create for this thread factory.
priority - The thread priority of created threads.
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thread-name-pattern - The template used to create names for threads. The
following patterns may be used:
%% - A percent sign
%t - The per-factory thread sequence number
%g - The global thread sequence number
%f - The factory sequence number
%i - The thread ID
3. Assign the thread factory to a thread pool.
/subsystem=batch-jberet/thread-pool=THREAD_POOL_NAME:writeattribute(name=thread-factory,value=THREAD_FACTORY_NAME)
This will require a server reload.
reload
Set a Default Thread Pool
You can set a different thread pool as the default thread pool.
/subsystem=batch-jberet:write-attribute(name=default-threadpool,value=THREAD_POOL_NAME)
This will require a server reload.
reload
View Thread Pool Statistics
You can view runtime information about a batch thread pool using the read-resource
management CLI operation. You must use the include-runtime=true parameter in order to see
this runtime information.
/subsystem=batch-jberet/thread-pool=THREAD_POOL_NAME:readresource(include-runtime=true)
{
"outcome" => "success",
"result" => {
"active-count" => 0,
"completed-task-count" => 0L,
"current-thread-count" => 0,
"keepalive-time" => undefined,
"largest-thread-count" => 0,
"max-threads" => 15,
"name" => "THREAD_POOL_NAME",
"queue-size" => 0,
"rejected-count" => 0,
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"task-count" => 0L,
"thread-factory" => "THREAD_FACTORY_NAME"
}
}
You can also view runtime information for batch thread pools using the management console by
navigating to the Batch subsystem from the Runtime tab.
20.2. MANAGING BATCH JOBS
The Batch subsystem resource for deployments allows you to start, stop, and restart batch jobs.
You can also view the details of job executions.
Restart a Batch Job
You can restart a job that is in a STOPPED or FAILED state by providing its execution ID and
optionally any properties to use when restarting the batch job.
/deployment=DEPLOYMENT_NAME/subsystem=batch-jberet:restartjob(execution-id=EXECUTION_ID,properties={PROPERTY=VALUE})
The execution ID must be the most recent execution of the job instance.
Start a Batch Job
You can start a batch job by providing the job XML file and optionally any properties to use when
starting the batch job.
/deployment=DEPLOYMENT_NAME/subsystem=batch-jberet:start-job(job-xmlname=JOB_XML_NAME,properties={PROPERTY=VALUE})
Stop a Batch Job
You can stop a running batch job by providing its execution ID.
/deployment=DEPLOYMENT_NAME/subsystem=batch-jberet:stop-job(executionid=EXECUTION_ID)
View Batch Job Execution Details
You can view the details of batch job executions. You must use the include-runtime=true
parameter in order to see this runtime information.
/deployment=DEPLOYMENT_NAME/subsystem=batch-jberet:readresource(recursive=true,include-runtime=true)
{
"outcome" => "success",
"result" => {"job" => {"import-file" => {
"instance-count" => 2,
"running-executions" => 0,
"execution" => {
"2" => {
"batch-status" => "COMPLETED",
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"create-time" => "2016-04-11T22:03:12.708-0400",
"end-time" => "2016-04-11T22:03:12.718-0400",
"exit-status" => "COMPLETED",
"instance-id" => 58L,
"last-updated-time" => "2016-04-11T22:03:12.719-0400",
"start-time" => "2016-04-11T22:03:12.708-0400"
},
"1" => {
"batch-status" => "FAILED",
"create-time" => "2016-04-11T21:57:17.567-0400",
"end-time" => "2016-04-11T21:57:17.596-0400",
"exit-status" => "Error :
org.hibernate.exception.ConstraintViolationException: could not execute
statement",
"instance-id" => 15L,
"last-updated-time" => "2016-04-11T21:57:17.597-0400",
"start-time" => "2016-04-11T21:57:17.567-0400"
}
}
}}}
}
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CHAPTER 21. CONFIGURING HIGH AVAILABILITY
21.1. INTRODUCTION TO HIGH AVAILABILITY
JBoss EAP provides the following high availability services to guarantee the availability of deployed
Java EE applications.
Load balancing
This allows a service to handle a large number of requests by spreading the workload
across multiple servers. A client can have timely responses from the service even in the
event of a high volume of requests.
Failover
This allows a client to have uninterrupted access to a service even in the event of hardware
or network failures. If the service fails, another cluster member takes over the client’s
requests so that it can continue processing.
Clustering is a term that encompasses all of these capabilities. Members of a cluster can be
configured to share workloads (load balancing) and pick up client processing in the event of a failure
of another cluster member (failover).
Note
It is important to keep in mind that the JBoss EAP operating mode chosen (standalone
server or managed domain) pertains to how you want to manage your servers. High
availability services can be configured in JBoss EAP regardless of its operating mode.
JBoss EAP supports high availability at several different levels using various components. Some of
those components of the runtime and your applications that can be made highly-available are:
Instances of the application server
Web applications, when used in conjunction with the internal JBoss Web Server, Apache HTTP
Server, Microsoft IIS, or Oracle iPlanet Web Server
Stateful and stateless session Enterprise JavaBeans (EJBs)
Single sign-on (SSO) mechanisms
HTTP sessions
JMS services and message-driven beans (MDBs)
Singleton MSC services
Singleton deployments
Clustering is made available to JBoss EAP by the JGroups, Infinispan, and mod_cluster
subsystems. The ha and full-ha profiles have these systems enabled. In JBoss EAP, these services
start up and shut down on demand, but they will only start up if an application configured as
distributable is deployed on the servers.
See the JBoss EAP Development Guide for how to mark an application as distributable.
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21.2. CLUSTER COMMUNICATION WITH JGROUPS
21.2.1. About JGroups
JGroups is a toolkit for reliable messaging and can be used to create clusters whose nodes can
send messages to each other.
The JGroups subsystem provides group communication support for high availability services in
JBoss EAP. It allows you to configure named channels and protocol stacks as well as view runtime
statistics for channels. The JGroups subsystem is available when using a configuration that provides
high availability capabilities, such as the ha or full-ha profile in a managed domain, or the
standalone-ha.xml or standalone-full-ha.xml configuration file for a standalone server.
JBoss EAP is preconfigured with two JGroups stacks:
udp
The nodes in the cluster use User Datagram Protocol (UDP) multicasting to communicate
with each other. This is the default stack.
tcp
The nodes in the cluster use Transmission Control Protocol (TCP) to communicate with
each other.
You can use the preconfigured stacks or define your own to suit your system’s specific
requirements.
Note
TCP has more overhead and is often considered slower than UDP since it handles error
checking, packet ordering, and congestion control itself. JGroups handles these features
for UDP, whereas TCP guarantees them itself. TCP is a good choice when using JGroups
on unreliable or high congestion networks, or when multicast is not available.
21.2.2. Switch the Default JGroups Channel to Use TCP
By default, cluster nodes communicate using the UDP protocol. The default ee JGroups channel
uses the predefined udp protocol stack.
Some networks only allow TCP to be used. Use the following management CLI command to switch
the ee channel to use the preconfigured tcp stack.
/subsystem=jgroups/channel=ee:write-attribute(name=stack,value=tcp)
This default tcp stack uses the MPING protocol, which uses IP multicast to discover the initial cluster
membership. See the following sections for configuring stacks for alternative membership discovery
protocols:
Using the TCPPING protocol to define a static cluster membership list.
Using the TCPGOSSIP protocol to use an external gossip router to discover the members of a
cluster.
21.2.3. Configure TCPPING
This procedure creates a new JGroups stack that uses the TCPPING protocol to define a static
cluster membership list. A base script is provided that creates a tcpping stack and sets the default
ee channel to use this new stack. The management CLI commands in this script must be
customized for your environment and will be processed as a batch.
1. Copy the following script into a text editor and save it to the local file system.
batch
# Add the tcpping stack
/subsystem=jgroups/stack=tcpping:add
/subsystem=jgroups/stack=tcpping/transport=TCP:add(socketbinding=jgroups-tcp)
/subsystem=jgroups/stack=tcpping/protocol=TCPPING:add
# Set the properties for the TCPPING protocol
/subsystem=jgroups/stack=tcpping/protocol=TCPPING:writeattribute(name=properties,value=
{initial_hosts="HOST_A[7600],HOST_B[7600]",port_range=0,timeout=3
000})
/subsystem=jgroups/stack=tcpping/protocol=MERGE3:add
/subsystem=jgroups/stack=tcpping/protocol=FD_SOCK:add(socketbinding=jgroups-tcp-fd)
/subsystem=jgroups/stack=tcpping/protocol=FD:add
/subsystem=jgroups/stack=tcpping/protocol=VERIFY_SUSPECT:add
/subsystem=jgroups/stack=tcpping/protocol=pbcast.NAKACK2:add
/subsystem=jgroups/stack=tcpping/protocol=UNICAST3:add
/subsystem=jgroups/stack=tcpping/protocol=pbcast.STABLE:add
/subsystem=jgroups/stack=tcpping/protocol=pbcast.GMS:add
/subsystem=jgroups/stack=tcpping/protocol=MFC:add
/subsystem=jgroups/stack=tcpping/protocol=FRAG2:add
# Set tcpping as the stack for the ee channel
/subsystem=jgroups/channel=ee:writeattribute(name=stack,value=tcpping)
run-batch
reload
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Note that the order of protocols defined is important.
2. Modify the script for your environment.
If you are running in a managed domain, you must specify which profile to update by
preceding the /subsystem=jgroups commands with /profile=PROFILE_NAME.
Adjust the TCPPING properties, which are optional, for your environment:
initial_hosts: A comma-separated list of the hosts which are considered wellknown, and will be available to look up the initial membership.
port_range: If desired, you can assign a port range. If you assign a port range of
2, and the initial port is 7600, then TCPPING will attempt to contact each host on
ports 7600-7601.
timeout: A timeout value, in milliseconds, for cluster members.
3. Run the script by passing the script file to the management CLI.
$ EAP_HOME/bin/jboss-cli.sh --connect --file=/path/to/SCRIPT_NAME
The TCPPING stack is now available and TCP is used for network communication.
21.2.4. Configure TCPGOSSIP
This procedure creates a new JGroups stack that uses the TCPGOSSIP protocol to use an external
gossip router to discover the members of a cluster. A base script is provided that creates a
tcpgossip stack and sets the default ee channel to use this new stack. The management CLI
commands in this script must be customized for your environment and will be processed as a batch.
1. Copy the following script into a text editor and save it to the local file system.
batch
# Add the tcpgossip stack
/subsystem=jgroups/stack=tcpgossip:add
/subsystem=jgroups/stack=tcpgossip/transport=TCP:add(socketbinding=jgroups-tcp)
/subsystem=jgroups/stack=tcpgossip/protocol=TCPGOSSIP:add
# Set the properties for the TCPGOSSIP protocol
/subsystem=jgroups/stack=tcpgossip/protocol=TCPGOSSIP:writeattribute(name=properties,value={initial_hosts="HOST_A[13001]"})
/subsystem=jgroups/stack=tcpgossip/protocol=MERGE3:add
/subsystem=jgroups/stack=tcpgossip/protocol=FD_SOCK:add(socketbinding=jgroups-tcp-fd)
/subsystem=jgroups/stack=tcpgossip/protocol=FD:add
/subsystem=jgroups/stack=tcpgossip/protocol=VERIFY_SUSPECT:add
/subsystem=jgroups/stack=tcpgossip/protocol=pbcast.NAKACK2:add
/subsystem=jgroups/stack=tcpgossip/protocol=UNICAST3:add
/subsystem=jgroups/stack=tcpgossip/protocol=pbcast.STABLE:add
/subsystem=jgroups/stack=tcpgossip/protocol=pbcast.GMS:add
/subsystem=jgroups/stack=tcpgossip/protocol=MFC:add
/subsystem=jgroups/stack=tcpgossip/protocol=FRAG2:add
# Set tcpgossip as the stack for the ee channel
/subsystem=jgroups/channel=ee:write-
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attribute(name=stack,value=tcpgossip)
run-batch
reload
Note that the order of protocols defined is important.
2. Modify the script for your environment.
If you are running in a managed domain, you must specify which profile to update by
preceding the /subsystem=jgroups commands with /profile=PROFILE_NAME.
Adjust the TCPGOSSIP properties, which are optional, for your environment:
initial_hosts: A comma-separated list of the hosts which are considered wellknown, and will be available to look up the initial membership.
reconnect_interval: The interval in milliseconds by which a disconnected stub
attempts to reconnect to the gossip router.
sock_conn_timeout: The maximum time for socket creation. The default is 1000
milliseconds.
sock_read_timeout: The maximum time in milliseconds to block on a read. A
value of 0 will block indefinitely.
3. Run the script by passing the script file to the management CLI.
$ EAP_HOME/bin/jboss-cli.sh --connect --file=/path/to/SCRIPT_NAME
The TCPGOSSIP stack is now available and TCP is used for network communication. This stack is
configured for use with a gossip router so that JGroups cluster members can find other cluster
members.
21.2.5. Binding JGroups to a Network Interface
By default, JGroups only binds to the private network interface, which points to localhost in the
default configuration. For security reasons, JGroups will not bind to the network interface defined by
the -b argument specified during JBoss EAP startup, as clustering traffic should not be exposed on
a public network interface.
See the Network and Port Configuration chapter in this guide for information about how to configure
network interfaces.
Important
For security reasons, JGroups should only be bound to a non-public network interface.
For performance reasons, we also recommend that the network interface for JGroups
traffic should be part of a dedicated Virtual Local Area Network (VLAN).
21.2.6. Securing a Cluster
There are several concerns to address in order to run a cluster securely:
Preventing unauthorized nodes from joining the cluster. This is addressed by requiring
authentication.
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Preventing non-members from communicating with cluster members. This is addressed by
encrypting messages.
Configuring Authentication
JGroups authentication is performed by the AUTH protocol. The purpose is to ensure that only
authenticated nodes can join a cluster.
In the applicable server configuration file, add the AUTH protocol with the appropriate property
settings. The AUTH protocol should be configured immediately before the pbcast.GMS protocol.
org.jgroups.auth.MD5Token
mytoken
MD5
Configuring Encryption
To encrypt messages, JGroups uses a secret key that is shared by the members of a cluster. The
sender encrypts the message using the shared secret key, and the receiver decrypts the message
using the same secret key. With symmetric encryption, which is configured using the SYM_ENCRYPT
protocol, nodes use a shared keystore to retrieve the secret key. With asymmetric encryption, which
is configured using the ASYM_ENCRYPT protocol, nodes retrieve the secret key from the coordinator
of the cluster after being authenticated using AUTH.
Using Symmetric Encryption
In order to use SYM_ENCRYPT, you must set up a keystore that will be referenced in the JGroups
configuration for each node.
1. Create a keystore.
In the following command, replace VERSION with the appropriate JGroups JAR version and
PASSWORD with a keystore password.
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$ java -cp
EAP_HOME/modules/system/layers/base/org/jgroups/main/jgroupsVERSION.jar org.jgroups.demos.KeyStoreGenerator --alg AES --size
128 --storeName defaultStore.keystore --storepass PASSWORD -alias mykey
This will generate a defaultStore.keystore file that will be referenced in the JGroups
configuration.
2. Configure the SYM_ENCRYPT protocol in the JGroups subsystem.
In the applicable server configuration file, add the SYM_ENCRYPT protocol with the
appropriate property settings. The SYM_ENCRYPT protocol should be configured
immediately before the pbcast.NAKACK2 protocol.
SunJCE
AES
true
/path/to/defaultStore.keystore
PASSWORD
mykey
Note
Configuring AUTH is optional when using SYM_ENCRYPT.
Using Asymmetric Encryption
1. Configure the ASYM_ENCRYPT protocol in the JGroups subsystem.
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In the applicable server configuration file, add the ASYM_ENCRYPT protocol with the
appropriate property settings. The ASYM_ENCRYPT protocol should be configured
immediately before the pbcast.NAKACK2 protocol.
true
128
AES/ECB/PKCS5Padding
512
RSA
2. Configure the AUTH protocol in the JGroups subsystem.
AUTH is required by ASYM_ENCRYPT. See the Configuring Authentication section for
instructions.
21.2.7. Configure JGroups Thread Pools
The jgroups subsystem contains the default, internal, oob, and timer thread pools. These
pools can be configured for any JGroups stack.
The following table lists the attributes you can configure for each thread pool and the default value
for each.
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Thread Pool Name
keepalive-time
max-threads
min-threads
queue-length
default
60000L
300
20
100
internal
60000L
4
2
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Thread Pool Name
keepalive-time
max-threads
min-threads
queue-length
oob
60000L
300
20
0
timer
5000L
4
2
500
Use the following syntax to configure a JGroups thread pool using the management CLI.
/subsystem=jgroups/stack=STACK_TYPE/transport=TRANSPORT_TYPE/threadpool=THREAD_POOL_NAME:write-attribute(name=ATTRIBUTE_NAME,
value=ATTRIBUTE_VALUE)
The following is an example of the management CLI command to set the max-threads value to
500 in the default thread pool for the udp stack.
/subsystem=jgroups/stack=udp/transport=UDP/thread-pool=default:writeattribute(name="max-threads", value="500")
21.2.8. Configure JGroups Send and Receive Buffers
Resolving Buffer Size Warnings
By default, JGroups is configured with certain send and receive buffer values. However, your
operating system may limit the available buffer sizes and JBoss EAP may not be able to use its
configured buffer values. In this situation you will see warnings in the JBoss EAP logs similar to the
following:
WARNING [org.jgroups.protocols.UDP] (ServerService Thread Pool -- 68)
JGRP000015: the send buffer of socket DatagramSocket was set to 640KB,
but the OS only allocated 212.99KB.
This might lead to performance problems. Please set your max send
buffer in the OS correctly (e.g. net.core.wmem_max on Linux)
WARNING [org.jgroups.protocols.UDP] (ServerService Thread Pool -- 68)
JGRP000015: the receive buffer of socket DatagramSocket was set to
20MB, but the OS only allocated 212.99KB.
This might lead to performance problems. Please set your max receive
buffer in the OS correctly (e.g. net.core.rmem_max on Linux)
To resolve this, consult your operating system documentation for instructions on how to increase the
buffer size. For Red Hat Enterprise Linux systems, edit /etc/sysctl.conf as the root user to
configure maximum values for buffer sizes that will survive system restarts. For example:
# Allow a 25MB UDP receive buffer for JGroups
net.core.rmem_max = 26214400
# Allow a 1MB UDP send buffer for JGroups
net.core.wmem_max = 1048576
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After modifying /etc/sysctl.conf, run sysctl -p for the changes to take effect.
Configuring JGroups Buffer Sizes
You can configure the JGroups buffer sizes that JBoss EAP uses by setting the following transport
properties on the UDP and TCP JGroups stacks.
UDP Stack
ucast_recv_buf_size
ucast_send_buf_size
mcast_recv_buf_size
mcast_send_buf_size
TCP Stack
recv_buf_size
send_buf_size
JGroups buffer sizes can be configured using the management console or the management CLI.
Use the following syntax to set a JGroups buffer size property using the management CLI.
/subsystem=jgroups/stack=STACK_NAME/transport=TRANSPORT/property=PROPER
TY_NAME:add(value=BUFFER_SIZE)
The following is an example management CLI command to set the recv_buf_size property to
20000000 on the tcp stack.
/subsystem=jgroups/stack=tcp/transport=TRANSPORT/property=recv_buf_size
:add(value=20000000)
JGroups buffer sizes can also be configured using the management console by navigating to the
JGroups subsystem from the Configuration tab, viewing the relevant stack, selecting Transport,
and selecting the transport Properties tab.
21.3. INFINISPAN
21.3.1. About Infinispan
Infinispan is a Java data grid platform that provides a JSR-107-compatible cache interface for
managing cached data. For more information about Infinispan functionality and configuration options
see the Infinispan Documentation.
The Infinispan subsystem provides caching support for JBoss EAP. It allows you to configure and
view runtime metrics for named cache containers and caches.
When using a configuration that provides high availability capabilities, such as the ha or full-ha
profile in a managed domain, or the standalone-ha.xml or standalone-full-ha.xml
configuration file for a standalone server, the Infinispan subsystem provides caching, state
replication, and state distribution support. In non-high-availability configurations, the Infinispan
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subsystem provides local caching support.
Important
Infinispan is delivered as a private module in JBoss EAP to provide the caching
capabilities of JBoss EAP. Infinispan is not supported for direct use by applications.
21.3.2. Cache Containers
A cache container is a repository for the caches used by a subsystem. Each cache container defines
a default cache to be used.
JBoss EAP 7 defines the following default Infinispan cache containers:
server for singleton caching
web for web session clustering
ejb for stateful session bean clustering
hibernate for entity caching
Example: Default Infinispan Configuration
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Note the default cache defined in each cache container. For example, the web cache container
defines the dist distributed cache as the default. The dist cache will therefore be used when
clustering web sessions.
Important
You can add additional caches and cache containers, for example, for HTTP sessions,
stateful session beans, or singleton services or deployments. It is not supported to use
these caches directly by user applications.
21.3.2.1. Configure Cache Containers
Cache containers and cache attributes can be configured using the management console or
management CLI.
Warning
You should avoid changing cache or cache container names, as other components in
the configuration may reference them.
Configure Caches Using the Management Console
Once you navigate to the Infinispan subsystem from the Configuration tab in the management
console, you can configure caches and cache containers. In a managed domain, make sure to
select the appropriate profile to configure.
Add a cache container.
Click the Add button next to the Cache Container heading and enter the settings for the new
cache container.
Update cache container settings.
Choose the appropriate cache container and select Container Settings from the drop down.
Configure the cache container settings as necessary.
Update cache container transport settings.
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Choose the appropriate cache container and select Transport Settings from the drop down.
Configure the cache container transport settings as necessary.
Configure caches.
Choose the appropriate cache container and select View. From the appropriate cache tab (for
example, Replicated Caches), you can add, update, and remove caches.
Configure Caches Using the Management CLI
You can configure caches and cache containers using the management CLI. In a managed domain,
you must specify the profile to update by preceding these commands with
/profile=PROFILE_NAME.
Add a cache container.
/subsystem=infinispan/cache-container=CACHE_CONTAINER:add
Add a replicated cache.
/subsystem=infinispan/cache-container=CACHE_CONTAINER/replicatedcache=CACHE:add(mode=MODE)
Set the default cache for a cache container.
/subsystem=infinispan/cache-container=CACHE_CONTAINER:writeattribute(name=default-cache,value=CACHE)
Configure batching for a replicated cache.
/subsystem=infinispan/cache-container=CACHE_CONTAINER/replicatedcache=CACHE/component=transaction:writeattribute(name=mode,value=BATCH)
21.3.3. Clustering Modes
Clustering can be configured in two different ways in JBoss EAP using Infinispan. The best method
for your application will depend on your requirements. There is a trade-off between availability,
consistency, reliability and scalability with each mode. Before choosing a clustering mode, you must
identify what are the most important features of your network for you, and balance those
requirements.
Cache Modes
Replicated
Replicated mode automatically detects and adds new instances on the cluster. Changes
made to these instances will be replicated to all nodes on the cluster. Replicated mode
typically works best in small clusters because of the amount of information that has to be
replicated over the network. Infinispan can be configured to use UDP multicast, which
alleviates network traffic congestion to a degree.
Distributed
Distributed mode allows Infinispan to scale the cluster linearly. Distributed mode uses a
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consistent hash algorithm to determine where in a cluster a new node should be placed. The
number of copies (owners) of information to be kept is configurable. There is a trade-off
between the number of copies kept, durability of the data, and performance. The more
copies that are kept, the more impact on performance, but the less likely you are to lose
data in a server failure. The hash algorithm also works to reduce network traffic by locating
entries without multicasting or storing metadata.
You should consider using distributed mode as a caching strategy when the cluster size
exceeds 6-8 nodes. With distributed mode, data is distributed to only a subset of nodes
within the cluster, as opposed to all nodes.
Synchronous and Asynchronous Replication
Replication can be performed either in synchronous or asynchronous mode, and the mode chosen
depends on your requirements and your application.
Synchronous replication
With synchronous replication, the thread that handles the user request is blocked until
replication has been successful. When the replication is successful, a response is sent back
to the client, and only then is the thread is released. Synchronous replication has an impact
on network traffic because it requires a response from each node in the cluster. It has the
advantage, however, of ensuring that all modifications have been made to all nodes in the
cluster.
Asynchronous replication
With asynchronous replication, Infinispan uses a thread pool to carry out replication in the
background. The sender does not wait for replies from other nodes in the cluster. However,
cache reads for the same session will block until the previous replication completes so that
stale data is not read. Replication is triggered either on a time basis or by queue size. Failed
replication attempts are written to a log, not notified in real time.
21.3.3.1. Configure the Cache Mode
You can change the default cache using the management CLI.
Note
This section shows instructions specific to configuring the web session cache, which
defaults to distributed mode. The steps and management CLI commands can easily be
adjusted to apply to other cache containers.
Change to Replicated Cache Mode
The default JBoss EAP 7 configuration for the web session cache does not include a repl
replicated cache. This cache must first be added.
Note
The below management CLI commands are for a standalone server. When running in a
managed domain, you must specify which profile to update by preceding the
/subsystem=infinispan commands with /profile=PROFILE_NAME.
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1. Add the repl replicated cache.
/subsystem=infinispan/cache-container=web/replicatedcache=repl:add(mode=ASYNC)
/subsystem=infinispan/cache-container=web/replicatedcache=repl/component=transaction:writeattribute(name=mode,value=BATCH)
/subsystem=infinispan/cache-container=web/replicatedcache=repl/component=locking:write-attribute(name=isolation,
value=REPEATABLE_READ)
/subsystem=infinispan/cache-container=web/replicatedcache=repl/store=file:add
2. Change the default cache to the repl replicated cache.
/subsystem=infinispan/cache-container=web:writeattribute(name=default-cache,value=repl)
3. Reload the server.
reload
Change to Distributed Cache Mode
The default JBoss EAP 7 configuration for the web session cache already includes a dist
distributed cache.
Note
The below management CLI commands are for a standalone server. When running in a
managed domain, you must specify which profile to update by preceding the
/subsystem=infinispan commands with /profile=PROFILE_NAME.
1. Change the default cache to the dist distributed cache.
/subsystem=infinispan/cache-container=web:writeattribute(name=default-cache,value=dist)
2. Set the number of owners for the distributed cache. The following command sets 5 owners.
The default is 2.
/subsystem=infinispan/cache-container=web/distributedcache=dist/:write-attribute(name=owners,value=5)
3. Reload the server.
reload
21.3.3.2. Cache Strategy Performance
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When using a SYNC caching strategy, the cost of replication is easy to measure and directly seen in
response times since the request does not complete until the replication completes.
Although it seems that the ASYNC caching strategy should result in lower response times than the
SYNC caching strategy, this is only true under the right conditions. The ASYNC caching strategy is
more difficult to measure, but it can provide better performance than the SYNC strategy when the
duration between requests is long enough for the cache operation to complete. This is because the
cost of replication is not immediately seen in response times.
If requests for the same session are made too quickly, the cost of replication for the previous
request is shifted to the front of the subsequent request since it must wait for the replication from the
previous request to complete. For rapidly fired requests where a subsequent request is sent
immediately after a response is received, the ASYNC caching strategy will perform worse than the
SYNC caching strategy. Consequently, there is a threshold for the period of time between requests
for the same session where the SYNC caching strategy will actually perform better than the ASYNC
caching strategy. In real world usage, requests for the same session are not normally received in
rapid succession. Instead, there is typically a period of time in the order of a few seconds or more
between the requests. In this case, the ASYNC caching strategy is a sensible default and provides
the fastest response times.
21.3.4. Configure Infinispan Thread Pools
The infinispan subsystem contains the async-operations, expiration, listener,
persistence, remote-command, state-transfer, and transport thread pools. These pools
can be configured for any Infinispan cache container.
The following table lists the attributes you can configure for each thread pool in the infinispan
subsystem and the default value for each.
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Thread Pool Name
keepalive-time
max-threads
min-threads
queue-length
async-operations
60000L
25
25
1000
expiration
60000L
1
N/A
N/A
listener
60000L
1
1
100000
persistence
60000L
4
1
0
remote-command
60000L
200
1
0
state-transfer
60000L
60
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Thread Pool Name
keepalive-time
max-threads
min-threads
queue-length
transport
60000L
25
25
100000
Use the following syntax to configure an Infinispan thread pool using the management CLI.
/subsystem=infinispan/cache-container=CACHE_CONTAINER_NAME/threadpool=THREAD_POOL_NAME:write-attribute(name=ATTRIBUTE_NAME,
value=ATTRIBUTE_VALUE)
The following is an example of the management CLI command to set the max-threads value to 10
in the persistence thread pool for the server cache container.
/subsystem=infinispan/cache-container=server/threadpool=persistence:write-attribute(name="max-threads", value="10")
21.3.5. Infinispan Statistics
Runtime statistics about Infinispan caches and cache containers can be enabled for monitoring
purposes. Statistics collection is not enabled by default for performance reasons.
Statistics collection can be enabled for each cache container, cache, or both. The statistics option
for each cache overrides the option for the cache container. Enabling or disabling statistics collection
for a cache container will cause all caches in that container to inherit the setting, unless they
explicitly specify their own.
21.3.5.1. Enable Infinispan Statistics
Warning
Enabling Infinispan statistics may have a negative impact on the performance of the
Infinispan subsystem. Statistics should be enabled only when required.
You can enable or disable the collection of Infinispan statistics using the management console or
the management CLI. From the management console, navigate to the Infinispan subsystem from
the Configuration tab, select the appropriate cache or cache container, and edit the Statistics
enabled attribute. Use the below commands to enable statistics using the management CLI.
Enable statistics collection for a cache container. A server reload will be required.
/subsystem=infinispan/cache-container=CACHE_CONTAINER:writeattribute(name=statistics-enabled,value=true)
Enable statistics collection for a cache. A server reload will be required.
/subsystem=infinispan/cachecontainer=CACHE_CONTAINER/CACHE_TYPE=CACHE:writeattribute(name=statistics-enabled,value=true)
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Note
You can use the following command to undefine the statistics-enabled attribute of a
cache so that it will inherit the settings of its cache container’s statistics-enabled
attribute.
/subsystem=infinispan/cachecontainer=CACHE_CONTAINER/CACHE_TYPE=CACHE:undefineattribute(name=statistics-enabled)
21.3.6. Infinispan Partition Handling
An Infinispan cluster is built out of several nodes where data is stored. To prevent data loss if
multiple nodes fail, Infinispan copies the same data over multiple nodes. This level of data
redundancy is configured using the owners attribute. As long as fewer than the configured number
of nodes crash simultaneously, Infinispan will have a copy of the data available.
However, there are potential catastrophic situations that could occur when too many nodes
disappear from the cluster:
Split brain
This splits the cluster in two or more partitions, or sub-clusters, that operate independently.
In these circumstances, multiple clients reading and writing from different partitions see
different versions of the same cache entry, which for many applications is problematic.
Note
There are ways to alleviate the possibility for the split brain to happen, such as
redundant networks or IP bonding. However, these only reduce the window of
time for the problem to occur.
Multiple nodes crash in sequence
If multiple nodes, specifically the number of owners, crash in rapid sequence and Infinispan
does not have the time to properly rebalance its state between crashes, the result is partial
data loss.
The goal is to avoid situations in which incorrect data is returned to the user as a result of either split
brain or multiple nodes crashing in rapid sequence.
21.3.6.1. Split Brain
In a split brain situation, each network partition will install its own JGroups view, removing the nodes
from the other partitions. We do not have a direct way to determine whether the cluster has been
split into two or more partitions, since the partitions are unaware of each other. Instead, we assume
the cluster has split when one or more nodes disappear from the JGroups cluster without sending an
explicit leave message.
With partition handling disabled, each such partition would continue to function as an independent
cluster. Each partition may only see a part of the data, and each partition could write conflicting
updates in the cache.
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With partition handling enabled, if we detect a split, each partition does not start a rebalance
immediately, but first checks whether it should enter degraded mode instead:
If at least one segment has lost all its owners, meaning that at least the number of owners
specified has left since the last rebalance ended, the partition enters degraded mode.
If the partition does not contain a simple majority of the nodes (floor(numNodes/2) + 1) in the
latest stable topology, the partition also enters degraded mode.
Otherwise, the partition keeps functioning normally and starts a rebalance.
The stable topology is updated every time a rebalance operation ends and the coordinator
determines that another rebalance is not necessary. These rules ensure that at most, one partition
stays in available mode, and the other partitions enter degraded mode.
When a partition is in degraded mode, it only allows access to the keys that are wholly owned:
Requests (reads and writes) for entries that have all the copies on nodes within this partition are
honored.
Requests for entries that are partially or totally owned by nodes that have disappeared are
rejected with an AvailabilityException.
This guarantees that partitions cannot write different values for the same key (cache is consistent),
and also that one partition can not read keys that have been updated in the other partitions (no stale
data).
Note
Two partitions could start up isolated, and as long as they do not merge, they can read
and write inconsistent data. In the future, we may allow custom availability strategies (e.g.
check that a certain node is part of the cluster, or check that an external machine is
accessible) that could handle that situation as well.
21.3.6.2. Configuring Partition Handling
Currently the partition handling is disabled by default. Use the following management CLI command
to enable partition handling:
/subsystem=infinispan/cache-container=web/distributedcache=dist/component=partition-handling:write-attribute(name=enabled,
value=true)
21.3.7. Externalize HTTP Sessions to JBoss Data Grid
Note
You will need a Red Hat JBoss Data Grid subscription to use this functionality.
Red Hat JBoss Data Grid can be used as an external cache container for application specific data in
JBoss EAP, such as HTTP Sessions. This allows scaling of the data layer independent of the
application, and enables different JBoss EAP clusters, that may reside in various domains, to
access data from the same JBoss Data Grid cluster. Additionally, other applications can interface
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with the caches presented by Red Hat JBoss Data Grid.
The following example shows how to externalize HTTP sessions. It applies to both standalone
instances of JBoss EAP as well as managed domains. However, in a managed domain, each server
group requires a unique remote cache configured. While multiple server groups can utilize the same
Red Hat JBoss Data Grid cluster the respective remote caches will be unique to the JBoss EAP
server group.
Note
For each distributable application, an entirely new cache must be created. It can be
created in an existing cache container, for example, web.
To Externalize HTTP Sessions:
1. Define the location of the remote Red Hat JBoss Data Grid server by adding the networking
information to the socket-binding-group:
Example Adding Remote Socket Bindings
/socket-binding-group=standard-sockets/remote-destinationoutbound-socket-binding=remote-jdg-server1:add(host=JDGHostName1,
port=11222)
/socket-binding-group=standard-sockets/remote-destinationoutbound-socket-binding=remote-jdg-server2:add(host=JDGHostName2,
port=11222)
Resulting XML
Note
You will need a remote socket binding configured for each Red Hat JBoss Data
Grid server.
2. Ensure the remote cache containers are defined in JBoss EAP’s infinispan subsystem;
in the example below the cache attribute in the remote-store element defines the cache
name on the remote JBoss Data Grid server:
Example Adding a Remote Cache Container
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/subsystem=infinispan/cache-container=cacheContainer:add(defaultcache=default-cache,
module=org.jboss.as.clustering.web.infinispan, statisticsenabled=true)
/subsystem=infinispan/cachecontainer=cacheContainer/transport=jgroups:add(locktimeout=60000)
/subsystem=infinispan/cache-container=cacheContainer/replicatedcache=default-cache:add(mode=SYNC)
/subsystem=infinispan/cache-container=cacheContainer/replicatedcache=default-cache/component=locking:writeattribute(name=isolation,value=REPEATABLE_READ)
/subsystem=infinispan/cache-container=cacheContainer/replicatedcache=default-cache/component=transaction:writeattribute(name=mode,value=BATCH)
/subsystem=infinispan/cache-container=cacheContainer/replicatedcache=default-cache/store=remote:add(remote-servers=["remote-jdgserver1","remote-jdg-server2"], cache=default, sockettimeout=60000, preload=true, passivation=false, purge=false,
shared=true)
Resulting XML
[...]
3. Add cache information into the application’s jboss-web.xml. In the following example
cacheContainer is the name of the cache container, and default-cache is the name of
the default cache located in this container. An example file is shown below:
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SESSION
cacheContainer.default-cache
21.4. CONFIGURING JBOSS EAP AS A FRONT-END LOAD
BALANCER
You can configure JBoss EAP and the Undertow subsystem to act as a front-end load balancer to
proxy requests to back-end JBoss EAP servers. Since Undertow makes use of asynchronous IO,
the IO thread that is responsible for the connection is the only thread that is involved in the request.
That same thread is also used for the connection made to the back-end server.
You can use the following protocols:
http
ajp
http2
h2c (clear text HTTP2)
You can either define a static load balancer and specify the back-end hosts in your configuration, or
use the mod_cluster frontend and use mod_cluster to dynamically update the hosts.
21.4.1. Configure Undertow as a Load Balancer Using mod_cluster
You can use the built-in mod_cluster front-end load balancer to load balance other JBoss EAP
instances.
This procedure assumes that you are running in a managed domain and already have the following
configured:
A JBoss EAP server that will act as the load balancer.
This server uses the default profile, which is bound to the standard-sockets socket
binding group.
Two JBoss EAP servers, which will act as the back-end servers.
These servers are running in a cluster and use the ha profile, which is bound to the hasockets socket binding group.
The distributable application to be load balanced deployed to the back-end servers.
Configure the mod_cluster Front-end Load Balancer
The below steps load balance servers in a managed domain, but they can be adjusted to apply to a
set of standalone servers. Be sure to update the management CLI command values to suit your
environment.
1. Set the mod_cluster advertise security key.
Adding the advertise security key allows the load balancer and servers to authenticate
during discovery.
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Use the following management CLI command to set the mod_cluster advertise security key.
/profile=ha/subsystem=modcluster/mod-clusterconfig=configuration:write-attribute(name=advertise-security-key,
value=mypassword)
2. Create a socket binding with the multicast address and port for mod_cluster.
You need to create a socket configuration for mod_cluster to use for discovery and
communication with the servers that it is going to load balance.
Use the following management CLI command to add a modcluster socket binding with the
appropriate multicast address and port configured.
/socket-binding-group=standard-sockets/socketbinding=modcluster:add(multicast-port=23364, multicastaddress=224.0.1.105)
3. Include the mod_cluster load balancer.
Once you have the advertise security key and socket binding set up, you need to add the
mod_cluster filter to Undertow for the load balancer instance of JBoss EAP.
Use the following management CLI command to add the mod_cluster filter.
/profile=default/subsystem=undertow/configuration=filter/modcluster=modcluster:add(management-socket-binding=http, advertisesocket-binding=modcluster, security-key=mypassword)
Use the following management CLI command to bind the mod_cluster filter to the default
host.
/profile=default/subsystem=undertow/server=defaultserver/host=default-host/filter-ref=modcluster:add
Important
It is recommended that the management and advertise socket bindings used by
mod_cluster only be exposed to the internal network, not a public IP address.
The load balancer JBoss EAP server can now load balance the two back-end JBoss EAP servers.
21.4.2. Configure Undertow as a Static Load Balancer
To configure a static load balancer with Undertow, you need to configure a proxy handler in the
Undertow subsystem. To configure a proxy handler in Undertow, you need to do the following on
your JBoss EAP instance that will serve as your static load balancer:
1. Add a reverse proxy handler
2. Define the outbound socket bindings for each remote host
3. Add each remote host to the reverse proxy handler
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4. Add the reverse proxy location
The following example shows how to configure a JBoss EAP instance to be a static load balancer.
The JBoss EAP instance is located at lb.example.com and will load balance between two
additional servers: server1.example.com and server2.example.com. The load balancer will
reverse-proxy to the location /app and will the AJP protocol.
1. To add a reverse proxy handler:
/subsystem=undertow/configuration=handler/reverse-proxy=myhandler:add
2. To define the outbound socket bindings for each remote host:
/socket-binding-group=standard-sockets/remote-destinationoutbound-socket-binding=remotehost1/:add(host=server1.example.com, port=8009)
/socket-binding-group=standard-sockets/remote-destinationoutbound-socket-binding=remotehost2/:add(host=server2.example.com, port=8009)
3. To add each remote host to the reverse proxy handler:
/subsystem=undertow/configuration=handler/reverse-proxy=myhandler/host=host1:add(outbound-socket-binding=remote-host1,
scheme=ajp, instance-id=myroute, path=/test)
/subsystem=undertow/configuration=handler/reverse-proxy=myhandler/host=host2:add(outbound-socket-binding=remote-host2,
scheme=ajp, instance-id=myroute, path=/test)
4. To add the reverse proxy location:
/subsystem=undertow/server=default-server/host=defaulthost/location=\/app:add(handler=my-handler)
When accessing lb.example.com:8080/app, you will now see the content proxied from
server1.example.com and server2.example.com.
21.5. USING AN EXTERNAL WEB SERVER AS A PROXY SERVER
JBoss EAP can accept requests from an external web server using the supported HTTP, HTTPS, or
AJP protocol, depending on the external web server configuration.
See Overview of HTTP Connectors for details on the supported HTTP connectors for each web
server. Once you have decided which web server and HTTP connector to use, see the appropriate
section for information on configuring your connector:
See the mod_cluster, mod_jk, or mod_proxy section for Apache HTTP Server.
See the ISAPI connector section for Microsoft IIS.
See the NSAPI connector section for Oracle iPlanet Web Server.
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For the most current information about supported configurations for HTTP connectors, see JBoss
EAP supported configurations.
You also will need to make sure that JBoss EAP is configured to accept requests from external web
servers.
21.5.1. Overview of HTTP Connectors
JBoss EAP has the ability to use load-balancing and clustering mechanisms built into external web
servers, such as Apache HTTP Server, Microsoft IIS, and Oracle iPlanet as well as through
Undertow. JBoss EAP communicates with the web servers using a connector. These connectors are
configured within the Undertow subsystem of JBoss EAP.
The web servers include software modules which control the way that HTTP requests are routed to
JBoss EAP nodes. Each of these modules varies in how it works and how it is configured. The
modules are configured to balance work loads across multiple JBoss EAP nodes, to move work
loads to alternate servers in case of a failure event, or both.
JBoss EAP supports several different connectors. The one you choose depends on the web server
in use and the functionality you need. See the tables below for comparisons of the supported
configurations and features of the various HTTP connectors that are compatible with JBoss EAP.
Note
See Configure Undertow as a Load Balancer Using mod_cluster for using JBoss EAP 7
as a multi-platform load balancer.
For the most current information about supported configurations for HTTP connectors, see JBoss
EAP supported configurations.
Table 21.1. HTTP Connector Supported Configurations
Connector
Web Server
Supported Operating Systems
Supported
Protocols
mod_cluster
Red Hat JBoss Core
Services Apache HTTP
Server, Red Hat JBoss Web
Server Apache HTTP Server
Red Hat Enterprise Linux,
Microsoft Windows Server, Oracle
Solaris
HTTP,
HTTPS, AJP
mod_jk
Red Hat JBoss Core
Services Apache HTTP
Server, Red Hat JBoss Web
Server Apache HTTP Server
Red Hat Enterprise Linux,
Microsoft Windows Server, Oracle
Solaris
AJP
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Connector
Web Server
Supported Operating Systems
Supported
Protocols
mod_proxy
Red Hat JBoss Core
Services Apache HTTP
Server, Red Hat JBoss Web
Server Apache HTTP Server
Red Hat Enterprise Linux,
Microsoft Windows Server, Oracle
Solaris
HTTP,
HTTPS, AJP
ISAPI connector
Microsoft IIS
Microsoft Windows Server
AJP
NSAPI connector
Oracle iPlanet Web Server
Oracle Solaris
AJP
Table 21.2. HTTP Connector Features
Connector
Supports Sticky
Sessions
Adapts to Deployment Status
mod_cluster
Yes
Yes. Detects deployment and undeployment of
applications and dynamically decides whether to direct
client requests to a server based on whether the
application is deployed on that server.
mod_jk
Yes
No. Directs client requests to the container as long as
the container is available, regardless of application
status.
mod_proxy
Yes
No. Directs client requests to the container as long as
the container is available, regardless of application
status.
ISAPI connector
Yes
No. Directs client requests to the container as long as
the container is available, regardless of application
status.
NSAPI connector
Yes
No. Directs client requests to the container as long as
the container is available, regardless of application
status.
21.5.2. Apache HTTP Server
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A standalone Apache HTTP Server bundle is now available as a separate download with Red Hat
JBoss Core Services. This simplifies installation and configuration, and allows for a more consistent
update experience.
21.5.2.1. Installing Apache HTTP Server
For information on installing Apache HTTP Server, see the JBoss Core Services Apache HTTP
Server Installation Guide.
21.5.3. Accepting Requests from External Web Servers
JBoss EAP does not require any special configuration to begin accepting requests from a proxy
server as long as the correct protocol handler, for example AJP, HTTP, or HTTPS, is configured.
If the proxy server uses mod_jk, mod_proxy, ISAPI, or NSAPI, it sends requests to JBoss EAP and
JBoss EAP simply provides a response. With mod_cluster, you must also configure your network to
allow JBoss EAP to send information, such as its current load, application lifecycle events, and
health status, to the proxy server to help it determine where to route requests. For more information
about configuring a mod_cluster proxy server, see The mod_cluster HTTP Connector.
Update JBoss EAP Configuration
In the following procedure, substitute the protocols and ports in the examples with the ones you
need to configure.
1. Configure the instance-id attribute of Undertow.
The external web server identifies the JBoss EAP instance in its connector configuration
using the instance-id. Use the following management CLI command to set the
instance-id attribute in Undertow.
/subsystem=undertow:write-attribute(name=instance-id,value=node1)
In the above example, the external web server identifies the current JBoss EAP instance as
node1.
2. Add the necessary listeners to Undertow.
In order for an external web server to be able to connect to JBoss EAP web server,
Undertow needs a listener. Each protocol needs its own listener, which is tied to a socket
binding.
Note
Depending on your desired protocol and port configuration, this step may not be
necessary. An HTTP listener is configured in all default JBoss EAP configurations,
and an AJP listener is configured if you are using the ha or full-ha profile.
You can check whether the required listeners are already configured by reading
the default server configuration:
/subsystem=undertow/server=default-server:read-resource
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To add a listener to Undertow, it must have a socket binding. The socket binding is added to
the socket binding group used by your server or server group. The following management
CLI command adds an ajp socket binding, bound to port 8009, to the standardsockets socket binding group
/socket-binding-group=standard-sockets/socketbinding=ajp:add(port=8009)
The following management CLI command adds an ajp listener to Undertow, using the ajp
socket binding.
/subsystem=undertow/server=default-server/ajplistener=ajp:add(socket-binding=ajp)
21.6. THE MOD_CLUSTER HTTP CONNECTOR
The mod_cluster connector is an Apache HTTP Server-based load balancer. It uses a
communication channel to forward requests from the Apache HTTP Server to one of a set of
application server nodes.
The mod_cluster connector has several advantages over other connectors.
The mod_cluster Management Protocol (MCMP) is an additional connection between the JBoss
EAP servers and the Apache HTTP Server with the mod_cluster module enabled. It is used by
the JBoss EAP servers to transmit server-side load-balance factors and lifecycle events back to
the Apache HTTP Server via a custom set of HTTP methods.
Dynamic configuration of Apache HTTP Server with mod_cluster allows JBoss EAP servers to
join the load-balancing arrangement without manual configuration.
JBoss EAP performs the load-balancing factor calculations, rather than relying on the Apache
HTTP Server with mod_cluster. This makes load-balancing metrics more accurate than other
connectors.
The mod_cluster connector gives fine-grained application lifecycle control. Each JBoss EAP
server forwards web application context lifecycle events to the Apache HTTP Server, informing it
to start or stop routing requests for a given context. This prevents end users from seeing HTTP
errors due to unavailable resources.
AJP, HTTP or HTTPS transports can be used.
For more details on the specific configuration options of the mod_cluster subsystem, see the
mod_cluster Subsystem Attributes.
21.6.1. Configure mod_cluster in Apache HTTP Server
The mod_cluster modules are already included when installing JBoss Core Services Apache HTTP
Server or using JBoss Web Server and are loaded by default.
See the steps below to configure the mod_cluster module to suit your environment.
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Note
Red Hat customers can also use the Load Balancer Configuration Tool on the Red Hat
Customer Portal to quickly generate optimal configuration templates for mod_cluster and
other connectors. Note that you must be logged in to access this tool.
Configure mod_cluster
Apache HTTP Server already contains a mod_cluster configuration file, mod_cluster.conf, that
loads the mod_cluster modules and provides basic configuration. The IP address, port, and other
settings in this file, shown below, can be configured to suit your needs.
# mod_proxy_balancer should be disabled when mod_cluster is used
LoadModule proxy_cluster_module modules/mod_proxy_cluster.so
LoadModule cluster_slotmem_module modules/mod_cluster_slotmem.so
LoadModule manager_module modules/mod_manager.so
LoadModule advertise_module modules/mod_advertise.so
MemManagerFile cache/mod_cluster
Listen 6666
SetHandler mod_cluster-manager
Require ip 127.0.0.1
The Apache HTTP Server server is configured as a load balancer and can work with the
mod_cluster subsystem running on JBoss EAP. You must configure a mod_cluster worker node to
make JBoss EAP aware of mod_cluster.
If you want to disable advertising for mod_cluster and configure a static proxy list instead, see
Disable Advertisement for mod_cluster. For more information on the available mod_cluster
configuration options in Apache HTTP Server, see the Apache HTTP Server mod_cluster Directives
For more details on configuring mod_cluster, see the Configure Load Balancing Using Apache
HTTP Server and mod_cluster section of the JBoss Web Server HTTP Connectors and Load
Balancing Guide.
21.6.2. Disable Advertising for mod_cluster
By default, the mod_cluster subsystem’s balancer uses multicast UDP to advertise its availability to
the background workers. You can disable advertising and to use a proxy list instead using the
following procedure.
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Note
The management CLI commands in the following procedure assume that you are using
the full-ha profile in a managed domain. If you are using a profile other than full-ha,
use the appropriate profile name in the command. If you are running a standalone server,
remove the /profile=full-ha completely.
1. Modify the Apache HTTP Server configuration.
Edit the httpd.conf Apache HTTP Server configuration file. Make the following updates to
the virtual host that listens for MCPM requests, using the EnableMCPMReceive directive.
a. Add the directive to disable server advertisement.
Set the ServerAdvertise directive to Off to disable server advertisement.
ServerAdvertise Off
b. Disable the advertise frequency.
If your configuration specifies the AdvertiseFrequency parameter, comment it
out using a # character.
# AdvertiseFrequency 5
c. Enable the ability to receive MCPM messages.
Ensure that the EnableMCPMReceive directive exists, to allow the web server to
receive MCPM messages from the worker nodes.
EnableMCPMReceive
2. Disable advertising in the JBoss EAP mod_cluster subsystem.
Use the following management CLI command to disable advertising.
/profile=full-ha/subsystem=modcluster/mod-clusterconfig=configuration/:write-attribute(name=advertise,value=false)
Important
Be sure to continue to the next step to provide the list of proxies. Advertising will
not be disabled if the list of proxies is empty.
3. Provide a list of proxies in the JBoss EAP mod_cluster subsystem.
It is necessary to provide a list of proxies because the mod_cluster subsystem will not be
able to automatically discover proxies if advertising is disabled.
First, define the outbound socket bindings in the appropriate socket binding group.
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/socket-binding-group=full-ha-sockets/remote-destinationoutbound-socket-binding=proxy1:add(host=10.33.144.3,port=6666)
/socket-binding-group=full-ha-sockets/remote-destinationoutbound-socket-binding=proxy2:add(host=10.33.144.1,port=6666)
Next, add the proxies to the mod_cluster configuration.
/profile=full-ha/subsystem=modcluster/mod-clusterconfig=configuration:list-add(name=proxies,value=proxy1)
/profile=full-ha/subsystem=modcluster/mod-clusterconfig=configuration:list-add(name=proxies,value=proxy2)
The Apache HTTP Server balancer no longer advertises its presence to worker nodes and UDP
multicast is no longer used.
21.6.3. Configure a mod_cluster Worker Node
A mod_cluster worker node consists of a JBoss EAP server. This server can be a standalone server
or part of a server group in a managed domain. A separate process runs within JBoss EAP, which
manages all of the worker nodes of the cluster. This is called the master.
Worker nodes in a managed domain share an identical configuration across a server group. Worker
nodes running as standalone servers are configured individually. The configuration steps are
otherwise identical.
A standalone server must be started with the standalone-ha or standalone-full-ha profile.
A server group in a managed domain must use the ha or full-ha profile, and the ha-sockets or
full-ha-sockets socket binding group. JBoss EAP ships with a cluster-enabled server group
called other-server-group which meets these requirements.
Configure a Worker Node
The management CLI commands in this procedure assume that you are using a managed domain
with the full-ha profile. If you are running a standalone server, remove the /profile=full-ha
portion of the commands.
1. Configure the network interfaces.
By default, the network interfaces all default to 127.0.0.1. Every physical host that hosts
either a standalone server or one or more servers in a server group needs its interfaces to
be configured to use its public IP address, which the other servers can see.
Use the following management CLI commands to modify the external IP addresses for the
management, public, and unsecure interfaces as appropriate for your environment. Be
sure to replace EXTERNAL_IP_ADDRESS in the command with the actual external IP
address of the host.
/interface=management:write-attribute(name=inetaddress,value="${jboss.bind.address.management:EXTERNAL_IP_ADDRES
S}")
/interface=public:write-attribute(name=inet-
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address,value="${jboss.bind.address.public:EXTERNAL_IP_ADDRESS}")
/interface=unsecure:write-attribute(name=inetaddress,value="${jboss.bind.address.unsecure:EXTERNAL_IP_ADDRESS}
")
Reload the server.
reload
2. Configure host names.
Set a unique host name for each host that participates in a managed domain. This name
must be unique across slaves and will be used for the slave to identify to the cluster, so
make a note of the name you use.
a. Start the JBoss EAP slave host, using the appropriate host.xml configuration file.
$ EAP_HOME/bin/domain.sh --host-config=host-slave.xml
b. Use the following management CLI command to set a unique host name. This
example uses slave1 as the new host name.
/host=EXISTING_HOST_NAME:writeattribute(name=name,value=slave1)
For more information on configuring a host name, see Configure the Name of a
Host.
3. Configure each host to connect to the domain controller.
Note
This step does not apply for a standalone server.
For newly configured hosts that need to join a managed domain, you must remove the local
element and add the remote element host attribute that points to the domain controller.
a. Start the JBoss EAP slave host, using the appropriate host.xml configuration file.
$ EAP_HOME/bin/domain.sh --host-config=host-slave.xml
b. Use the following management CLI command to configure the domain controller
settings.
/host=SLAVE_HOST_NAME:write-remote-domaincontroller(host=DOMAIN_CONTROLLER_IP_ADDRESS,port=${jboss.d
omain.master.port:9999},security-realm="ManagementRealm")
This modifies the XML in the host-slave.xml file as follows:
For more information, see Connect to the Domain Controller.
4. Configure authentication for each slave host.
Each slave server needs a username and password created in the domain controller’s or
standalone master’s ManagementRealm. On the domain controller or standalone master,
run the EAP_HOME/bin/add-user.sh command for each host. Add a management user
for each host with the username that matches the host name of the slave.
Be sure to answer yes to the last question, that asks "Is this new user going to be used for
one AS process to connect to another AS process?", so that you are provided with a secret
value.
Example add-user script output (trimmed)
$ EAP_HOME/bin/add-user.sh
What type of user do you wish to add?
a) Management User (mgmt-users.properties)
b) Application User (application-users.properties)
(a): a
Username : slave1
Password : changeme
Re-enter Password : changeme
What groups do you want this user to belong to? (Please enter a
comma separated list, or leave blank for none)[ ]:
About to add user 'test' for realm 'ManagementRealm'
Is this correct yes/no? yes
Is this new user going to be used for one AS process to connect
to another AS process?
e.g. for a slave host controller connecting to the master or for
a Remoting connection for server to server EJB calls.
yes/no? yes
To represent the user add the following to the server-identities
definition
4. Add the nodes in ClusterNEW to the mod_cluster configuration individually using the
process described in the Configure a mod_cluster Worker Node section. Additionally use
the aforementioned procedure and set their load-balancing group to ClusterNEW.
At this point, you can see an output similar to the undermentioned shortened example on
the mod_cluster-manager console:
mod_cluster/
LBGroup ClusterOLD: [Enable Nodes]
[Disable Nodes]
[Stop
Nodes]
Node node-1-jvmroute
(ajp://node1.oldcluster.example:8009):
[Enable Contexts]
[Disable Contexts]
[Stop
Contexts]
Balancer: qacluster, LBGroup: ClusterOLD,
Flushpackets: Off, ..., Load: 100
Virtual Host 1:
Contexts:
/my-deployed-application-context, Status:
ENABLED Request: 0 [Disable]
[Stop]
Node node-2-jvmroute
(ajp://node2.oldcluster.example:8009):
[Enable Contexts]
[Disable Contexts]
[Stop
Contexts]
Balancer: qacluster, LBGroup: ClusterOLD,
Flushpackets: Off, ..., Load: 100
Virtual Host 1:
Contexts:
/my-deployed-application-context, Status:
ENABLED Request: 0 [Disable]
[Stop]
LBGroup ClusterNEW: [Enable Nodes]
[Disable Nodes]
[Stop
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Nodes]
Node node-3-jvmroute
(ajp://node3.newcluster.example:8009):
[Enable Contexts]
[Disable Contexts]
[Stop
Contexts]
Balancer: qacluster, LBGroup: ClusterNEW,
Flushpackets: Off, ..., Load: 100
Virtual Host 1:
Contexts:
/my-deployed-application-context, Status:
ENABLED Request: 0 [Disable]
[Stop]
Node node-4-jvmroute
(ajp://node4.newcluster.example:8009):
[Enable Contexts]
[Disable Contexts]
[Stop
Contexts]
Balancer: qacluster, LBGroup: ClusterNEW,
Flushpackets: Off, ..., Load: 100
Virtual Host 1:
Contexts:
/my-deployed-application-context, Status:
ENABLED Request: 0 [Disable]
[Stop]
5. There are old active sessions within the ClusterOLD group and any new sessions are
created either within the ClusterOLD or CLusterNEW group. Next, we want to disable the
whole ClusterOLD group, so as we can power down its cluster nodes without causing any
error to currently active client’s sessions.
Click on the Disable Nodes link for LBGroup ClusterOLD on mod_cluster-manager web
console.
From this point on, only requests belonging to already established sessions will be routed to
members of ClusterOLD load-balancing group. Any new client’s sessions will be created in
the ClusterNEW group only. As soon as there are no active sessions within ClusterOLD
group, we can safely remove its members.
Note
Using Stop Nodes would command the load balancer to stop routing any
requests to this domain immediately. This will force a failover to another loadbalancing group which will cause session data loss to clients, provided there is no
session replication between ClusterNEW and ClusterOLD.
Default Load-Balancing Group
In case the current ClusterOLD setup does not contain any load-balancing group settings (one can
see LBGroup:, on mod_cluster-manager console), one can still take advantage of disabling the
ClusterOLD nodes. In this case, click on Disable Contexts for each of the ClusterOLD nodes.
Contexts of these nodes will be disabled and once there are no active sessions present, they will be
ready for removal. New clients' sessions will be created only on nodes with enabled contexts,
presumably ClusterNEW members in this example.
Using the Management CLI
In addition to the possibility of using mod_cluster-manager web console, one can leverage the
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management CLI to disable a particular context. The undermentioned operation is called stopcontext, but it makes the cluster node to send DISABLE-APP command to the load balancer, having
exactly the same effect as clicking on Disable link next to a particular context on mod_clustermanager console (note that virtual host aliases, e.g. default-host were removed from the
aforementioned mod_cluster-manager console output example).
In addition to the possibility of using mod_cluster-manager web console, one can leverage the
management CLI to disable a particular context. The operation used is called stop-context, but it
makes the cluster node to send DISABLE-APP command to the load balancer, having exactly the
same effect as clicking on Disable link next to a particular context on mod_cluster-manager console
(note that virtual host aliases, e.g. default-host were removed from the aforementioned mod_clustermanager console output example).
/profile=full-ha/subsystem=modcluster/:stop-context(context=/mydeployed-application-context, virtualhost=default-host, waittime=50)
To stop a particular context, cluster node or a whole load-balancing group means to force the
balancer to stop routing any request to it immediately, thus forcing failover to another available
context. To disable a particular context, cluster node or a whole load-balancing group means to tell
the balancer that no new sessions should be crated on this particular context/node/load-balancing
group.
21.7. APACHE MOD_JK HTTP CONNECTOR
Apache mod_jk is an HTTP connector that is provided for customers who need it for compatibility
purposes.
JBoss EAP can accept workloads from an Apache HTTP proxy server. The proxy server accepts
client requests from the web front-end, and passes the work to participating JBoss EAP servers. If
sticky sessions are enabled, the same client request always goes to the same JBoss EAP server,
unless the server is unavailable.
mod_jk communicates over the AJP 1.3 protocol. Other protocols can be used with mod_cluster or
mod_proxy. See the Overview of HTTP Connectors for more information.
Note
mod_cluster is a more advanced load balancer than mod_jk and is the recommended
HTTP connector. mod_cluster provides all of the functionality of mod_jk, plus additional
features. Unlike the JBoss EAP mod_cluster HTTP connector, an Apache mod_jk HTTP
connector does not know the status of deployments on servers or server groups, and
cannot adapt where it sends its work accordingly.
See the Apache mod_jk documentation for more information.
21.7.1. Configure mod_jk in Apache HTTP Server
The mod_jk module (mod_jk.so) is already included when installing JBoss Core Services Apache
HTTP Server or using JBoss Web Server, however, it is not loaded by default. Use the following
steps to load and configure mod_jk in Apache HTTP Server. Note that these steps assume that you
have already navigated to the httpd/ directory for Apache HTTP Server, which will vary depending
on your platform. For more information, see the installation instructions for your platform in the
JBoss Core Services Apache HTTP Server Installation Guide.
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Note
Red Hat customers can also use the Load Balancer Configuration Tool on the Red Hat
Customer Portal to quickly generate optimal configuration templates for mod_jk and other
connectors. Note that you must be logged in to access this tool.
1. Configure the mod_jk module.
Note
A sample mod_jk configuration file is provided at
conf.d/mod_jk.conf.sample. You can use this sample instead of creating
your own file by removing the .sample extension and modifying its contents as
needed.
Create a new file called conf.d/mod_jk.conf. Add the following configuration to the file,
making sure to modify the contents to suite your needs.
# Load mod_jk module
# Specify the filename of the mod_jk lib
LoadModule jk_module modules/mod_jk.so
# Where to find workers.properties
JkWorkersFile conf.d/workers.properties
# Where to put jk logs
JkLogFile logs/mod_jk.log
# Set the jk log level [debug/error/info]
JkLogLevel info
# Select the log format
JkLogStampFormat "[%a %b %d %H:%M:%S %Y]"
# JkOptions indicates to send SSK KEY SIZE
JkOptions +ForwardKeySize +ForwardURICompat -ForwardDirectories
# JkRequestLogFormat
JkRequestLogFormat "%w %V %T"
# Mount your applications
JkMount /application/* loadbalancer
# Add shared memory.
# This directive is present with 1.2.10 and
# later versions of mod_jk, and is needed for
# for load balancing to work properly
JkShmFile logs/jk.shm
# Add jkstatus for managing runtime data
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Note
The JkMount directive specifies which URLs Apache HTTP Server must forward
to the mod_jk module. Based on the directive’s configuration, mod_jk sends the
received URL to the correct workers. To serve static content directly and only use
the load balancer for Java applications, the URL path must be /application/*.
To use mod_jk as a load balancer, use the value /*, to forward all URLs to
mod_jk.
Aside from general mod_jk configuration, this file specifies to load the mod_jk.so module,
and defines where to find the workers.properties file.
2. Configure the mod_jk worker nodes.
Note
A sample workers configuration file is provided at
conf.d/workers.properties.sample. You can use this sample instead of
creating your own file by removing the .sample extension and modifying its
contents as needed.
Create a new file called conf.d/workers.properties. Add the following configuration
to the file, making sure to modify the contents to suite your needs.
# Define list of workers that will be used
# for mapping requests
worker.list=loadbalancer,status
# Define Node1
# modify the host as your host IP or DNS name.
worker.node1.port=8009
worker.node1.host=node1.mydomain.com
worker.node1.type=ajp13
worker.node1.ping_mode=A
worker.node1.lbfactor=1
# Define Node2
# modify the host as your host IP or DNS name.
worker.node2.port=8009
worker.node2.host=node2.mydomain.com
worker.node2.type=ajp13
worker.node2.ping_mode=A
worker.node2.lbfactor=1
# Load-balancing behavior
worker.loadbalancer.type=lb
worker.loadbalancer.balance_workers=node1,node2
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worker.loadbalancer.sticky_session=1
# Status worker for managing load balancer
worker.status.type=status
For details on the syntax of the mod_jk workers.properties file and other advanced
configuration options, see mod_jk Worker Properties.
3. Optionally, specify a JKMountFile directive.
In addition to the JKMount directive in the mod-jk.conf, you can specify a file which
contains multiple URL patterns to be forwarded to mod_jk.
a. Create a uriworkermap.properties file.
Note
A sample URI worker map configuration file is provided at
conf.d/uriworkermap.properties.sample. You can use this
sample instead of creating your own file by removing the .sample
extension and modifying its contents as needed.
Create a new file called conf.d/uriworkermap.properties. Add a line for
each URL pattern to be matched, for example:
# Simple worker configuration file
/*=loadbalancer
b. Update the configuration to point to uriworkermap.properties file.
Append the following to conf.d/mod_jk.conf.
# Use external file for mount points.
# It will be checked for updates each 60 seconds.
# The format of the file is: /url=worker
# /examples/*=loadbalancer
JkMountFile conf.d/uriworkermap.properties
For more details on configuring mod_jk, see the Configuring Apache HTTP Server to Load mod_jk
section of the JBoss Web Server HTTP Connectors and Load Balancing Guide.
21.7.2. Configure JBoss EAP to Communicate with mod_jk
The JBoss EAP Undertow subsystem needs to specify a listener in order to accept requests from
and send replies back to an external web server. Since mod_jk uses the AJP protocol, an AJP
listener must be configured.
If you are using one of the default high availability configurations (ha or full-ha), an AJP listener is
already configured.
For instructions, see Accepting Requests From External Web Servers.
21.8. APACHE MOD_PROXY HTTP CONNECTOR
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21.8. APACHE MOD_PROXY HTTP CONNECTOR
Apache mod_proxy is an HTTP connector that supports connections over AJP, HTTP, and HTTPS
protocols. mod_proxy can be configured in load-balanced or non-load-balanced configurations, and
it supports the notion of sticky sessions.
The mod_proxy module requires JBoss EAP to have the HTTP, HTTPS or AJP listener configured in
the Undertow subsystem, depending on which protocol you plan to use.
Note
mod_cluster is a more advanced load balancer than mod_proxy and is the recommended
HTTP connector. mod_cluster provides all of the functionality of mod_proxy, plus
additional features. Unlike the JBoss EAP mod_cluster HTTP connector, an Apache
mod_proxy HTTP connector does not know the status of deployments on servers or
server groups, and cannot adapt where it sends its work accordingly.
See the Apache mod_proxy documentation for more information.
21.8.1. Configure mod_proxy in Apache HTTP Server
The mod_proxy modules are already included when installing JBoss Core Services Apache HTTP
Server or using JBoss Web Server and are loaded by default.
See the appropriate section below to configure a basic load-balancing or non-load-balancing proxy.
These steps assume that you have already navigated to the httpd/ directory for Apache HTTP
Server, which will vary depending on your platform. For more information, see the installation
instructions for your platform in the JBoss Core Services Apache HTTP Server Installation Guide.
These steps also assume that the necessary HTTP listener has already been configured in the
JBoss EAP Undertow subsystem.
Note
Red Hat customers can also use the Load Balancer Configuration Tool on the Red Hat
Customer Portal to quickly generate optimal configuration templates for mod_proxy and
other connectors. Note that you must be logged in to access this tool.
Add a Non-load-balancing Proxy
Add the following configuration to your conf/httpd.conf file, directly beneath any other
directives you may have. Replace the values with ones appropriate to your setup.
# Your domain name
ServerName YOUR_DOMAIN_NAME
ProxyPreserveHost On
# The IP and port of JBoss
# These represent the default values, if your httpd is on the same host
# as your JBoss managed domain or server
ProxyPass / http://localhost:8080/
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ProxyPassReverse / http://localhost:8080/
# The location of the HTML files, and access control information
DocumentRoot /var/www
Options -Indexes
Order allow,deny
Allow from all
Add a Load-balancing Proxy
Note
The default Apache HTTP Server configuration has the mod_proxy_balancer.so
module disabled, as it is incompatible with mod_cluster. In order to complete this task,
you will need to load this module and disable the mod_cluster modules.
To use mod_proxy as a load balancer, and send work to multiple JBoss EAP instances, add the
following configuration to your conf/httpd.conf file. The example IP addresses are fictional.
Replace them with the appropriate values for your environment.
Order deny,allow
Allow from all
# Add each JBoss Enterprise Application Server by IP address and port.
# If the route values are unique like this, one node will not fail over
to the other.
BalancerMember http://192.168.1.1:8080 route=node1
BalancerMember http://192.168.1.2:8180 route=node2
# Your domain name
ServerName YOUR_DOMAIN_NAME
ProxyPreserveHost On
ProxyPass / balancer://mycluster/
# The location of the HTML files, and access control information
DocumentRoot /var/www
Options -Indexes
Order allow,deny
Allow from all
The examples above all communicate using the HTTP protocol. You can use AJP or HTTPS
protocols instead, if you load the appropriate mod_proxy modules. See the Apache mod_proxy
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documentation for more details.
Enable Sticky Sessions
A sticky session means that if a client request originally goes to a specific JBoss EAP worker, all
future requests will be sent to the same worker, unless it becomes unavailable. This is almost
always the recommended behavior.
To enable sticky sessions for mod_proxy, add the stickysession parameter to the ProxyPass
statement.
ProxyPass / balancer://mycluster stickysession=JSESSIONID
You can specify additional parameters to the ProxyPass statement, such as lbmethod and
nofailover. See the Apache mod_proxy documentation for more information on the available
parameters.
21.8.2. Configure JBoss EAP to Communicate with mod_proxy
The JBoss EAP Undertow subsystem needs to specify a listener in order to accept requests from
and send replies back to an external web server. Depending on the protocol that you will be using,
you may need to configure a listener.
An HTTP listener is configured in the JBoss EAP default configuration. If you are using one of the
default high availability configurations (ha or full-ha), an AJP listener is also preconfigured.
For instructions, see Accepting Requests From External Web Servers.
21.9. MICROSOFT ISAPI CONNECTOR
The Internet Server API (ISAPI) is a set of APIs used to write OLE Server extensions and filters for
web servers such as Microsoft’s Internet Information Services (IIS). isapi_redirect.dll is an
extension of mod_jk adjusted to IIS. isapi_redirect.dll enables you to configure JBoss EAP
instances as worker nodes with IIS as a load balancer.
Note
See the JBoss EAP supported configurations for information on the supported
configurations of Windows Server and IIS.
21.9.1. Configure Microsoft IIS to Use the ISAPI Connector
Download the ISAPI connector from the Red Hat Customer Portal:
1. Open a browser and log in to the Red Hat Customer Portal JBoss Software Downloads
page.
2. Select Web Connectors in the Product drop-down menu.
3. Select the latest JBoss Core Services version from the Version drop-down menu.
4. Find the Red Hat JBoss Core Services ISAPI Connector in the list, and click the
Download link.
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5. Extract the archive and copy the contents of the sbin directory to a location on your server.
The instructions below assume that the contents were copied to C:\connectors\.
To configure the IIS Redirector Using the IIS Manager (IIS 7):
1. Open the IIS manager by clicking Start → Run, and typing inetmgr.
2. In the tree view pane at the left, expand IIS 7.
3. Double-click ISAPI and CGI Registrations to open it in a new window.
4. In the Actions pane, click Add. The Add ISAPI or CGI Restriction window opens.
5. Specify the following values:
ISAPI or CGI Path: C:\connectors\isapi_redirect.dll
Description: jboss
Allow extension path to execute: select the check box.
6. Click OK to close the Add ISAPI or CGI Restriction window.
7. Define a JBoss Native virtual directory
Right-click Default Web Site, and click Add Virtual Directory. The Add Virtual Directory
window opens.
Specify the following values to add a virtual directory:
Alias: jboss
Physical Path: C:\connectors\
Click OK to save the values and close the Add Virtual Directory window.
8. Define a JBoss Native ISAPI Redirect Filter
In the tree view pane, expand Sites → Default Web Site.
Double-click ISAPI Filters. The ISAPI Filters Features view appears.
In the Actions pane, click Add. The Add ISAPI Filter window appears.
Specify the following values in the Add ISAPI Filter window:
Filter name: jboss
Executable: C:\connectors\isapi_redirect.dll
Click OK to save the values and close the Add ISAPI Filters window.
9. Enable the ISAPI-dll handler
Double-click the IIS 7 item in the tree view pane. The IIS 7 Home Features View opens.
Double-click Handler Mappings. The Handler Mappings Features View appears.
In the Group by combo box, select State. The Handler Mappings are displayed in
Enabled and Disabled Groups.
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Find ISAPI-dll. If it is in the Disabled group, right-click it and select Edit Feature
Permissions.
Enable the following permissions:
Read
Script
Execute
Click OK to save the values, and close the Edit Feature Permissions window.
Microsoft IIS is now configured to use the ISAPI connector.
21.9.2. Configure the ISAPI Connector to Send Client Requests to JBoss EAP
This task configures a group of JBoss EAP servers to accept requests from the ISAPI connector. It
does not include configuration for load-balancing or high-availability failover.
This configuration is done on the IIS server, and assumes that you already have JBoss EAP
configured to accept requests from an external web server. You also need full administrator access
to the IIS server and to have configured IIS to use the ISAPI connector.
Create Property Files and Set Up Redirection
1. Create a directory to store logs, property files, and lock files.
The rest of this procedure assumes that you are using the directory C:\connectors\ for
this purpose. If you use a different directory, modify the instructions accordingly.
2. Create the isapi_redirect.properties file.
Create a new file called C:\connectors\isapi_redirect.properties. Copy the
following contents into the file.
# Configuration file for the ISAPI Connector
# Extension uri definition
extension_uri=/jboss/isapi_redirect.dll
# Full path to the log file for the ISAPI Connector
log_file=c:\connectors\isapi_redirect.log
# Log level (debug, info, warn, error or trace)
log_level=info
# Full path to the workers.properties file
worker_file=c:\connectors\workers.properties
# Full path to the uriworkermap.properties file
worker_mount_file=c:\connectors\uriworkermap.properties
#Full path to the rewrite.properties file
rewrite_rule_file=c:\connectors\rewrite.properties
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If you do not want to use a rewrite.properties file, comment out the last line by placing
a # character at the beginning of the line.
3. Create the uriworkermap.properties file
The uriworkermap.properties file contains mappings between deployed application
URLs and which worker handles requests to them. The following example file shows the
syntax of the file. Place your uriworkermap.properties file into C:\connectors\.
# images and css files for path /status are provided by worker01
/status=worker01
/images/*=worker01
/css/*=worker01
# Path /web-console is provided by worker02
# IIS (customized) error page is used for http errors with number
greater or equal to 400
# css files are provided by worker01
/web-console/*=worker02;use_server_errors=400
/web-console/css/*=worker01
# Example of exclusion from mapping, logo.gif won't be displayed
# /web-console/images/logo.gif=*
# Requests to /app-01 or /app-01/something will be routed to
worker01
/app-01|/*=worker01
# Requests to /app-02 or /app-02/something will be routed to
worker02
/app-02|/*=worker02
4. Create the workers.properties file.
The workers.properties file contains mapping definitions between worker labels and
server instances. This file follows the syntax of the same file used for Apache mod_jk
worker properties configuration.
The following is an example of a workers.properties file. The worker names,
worker01 and worker02, must match the instance-id configured in the JBoss EAP
Undertow subsystem.
Place this file into the C:\connectors\ directory.
# An entry that lists all the workers defined
worker.list=worker01, worker02
# Entries that define the host and port associated with these
workers
# First JBoss EAP server definition, port 8009 is standard port
for AJP in EAP
worker.worker01.host=127.0.0.1
worker.worker01.port=8009
worker.worker01.type=ajp13
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# Second JBoss EAP server definition
worker.worker02.host=127.0.0.100
worker.worker02.port=8009
worker.worker02.type=ajp13
5. Create the rewrite.properties file.
The rewrite.properties file contains simple URL rewriting rules for specific
applications. The rewritten path is specified using name-value pairs, as shown in the
example below. Place this file into the C:\connectors\ directory.
#Simple example
# Images are accessible under abc path
/app-01/abc/=/app-01/images/
6. Restart your IIS server by using the net stop and net start commands.
C:\> net stop was /Y
C:\> net start w3svc
The IIS server is configured to send client requests to the specific JBoss EAP servers you have
configured, on an application-specific basis.
21.9.3. Configure the ISAPI Connector to Balance Client Requests Across
Multiple JBoss EAP Servers
This configuration balances client requests across the JBoss EAP servers you specify. This
configuration is done on the IIS server, and assumes that you already have JBoss EAP configured to
accept requests from an external web server. You also need full administrator access to the IIS
server and to have configured IIS to use the ISAPI connector.
Balance Client Requests Across Multiple Servers
1. Create a directory to store logs, property files, and lock files.
The rest of this procedure assumes that you are using the directory C:\connectors\ for
this purpose. If you use a different directory, modify the instructions accordingly.
2. Create the isapi_redirect.properties file.
Create a new file called C:\connectors\isapi_redirect.properties. Copy the
following contents into the file.
# Configuration file for the ISAPI Connector
# Extension uri definition
extension_uri=/jboss/isapi_redirect.dll
# Full path to the log file for the ISAPI Connector
log_file=c:\connectors\isapi_redirect.log
# Log level (debug, info, warn, error or trace)
log_level=info
# Full path to the workers.properties file
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worker_file=c:\connectors\workers.properties
# Full path to the uriworkermap.properties file
worker_mount_file=c:\connectors\uriworkermap.properties
#OPTIONAL: Full path to the rewrite.properties file
rewrite_rule_file=c:\connectors\rewrite.properties
If you do not want to use a rewrite.properties file, comment out the last line by placing
a # character at the beginning of the line.
3. Create the uriworkermap.properties file.
The uriworkermap.properties file contains mappings between deployed application
URLs and which worker handles requests to them. The following example file shows the
syntax of the file, with a load-balanced configuration. The wildcard (*) character sends all
requests for various URL sub-directories to the load balancer called router. The
configuration of the load balancer is covered in the next step.
Place your uriworkermap.properties file into C:\connectors\.
# images, css files, path /status and /web-console will be
# provided by nodes defined in the load-balancer called "router"
/css/*=router
/images/*=router
/status=router
/web-console|/*=router
# Example of exclusion from mapping, logo.gif won't be displayed
# /web-console/images/logo.gif=*
# Requests to /app-01 and /app-02 will be routed to nodes defined
# in the load-balancer called "router"
/app-01|/*=router
/app-02|/*=router
# mapping for management console, nodes in cluster can be enabled
or disabled here
/jkmanager|/*=status
4. Create the workers.properties file.
The workers.properties file contains mapping definitions between worker labels and
server instances. This file follows the syntax of the same file used for Apache mod_jk
worker properties configuration.
The following is an example of a workers.properties file. The load balancer is
configured near the end of the file, to comprise workers worker01 and worker02. These
worker names must match the instance-id configured in the JBoss EAP Undertow
subsystem.
Place this file into the C:\connectors\ directory.
# The advanced router LB worker
worker.list=router,status
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# First EAP server definition, port 8009 is standard port for AJP
in EAP
#
# lbfactor defines how much the worker will be used.
# The higher the number, the more requests are served
# lbfactor is useful when one machine is more powerful
# ping_mode=A – all possible probes will be used to determine
that
# connections are still working
worker.worker01.port=8009
worker.worker01.host=127.0.0.1
worker.worker01.type=ajp13
worker.worker01.ping_mode=A
worker.worker01.socket_timeout=10
worker.worker01.lbfactor=3
# Second EAP server definition
worker.worker02.port=8009
worker.worker02.host=127.0.0.100
worker.worker02.type=ajp13
worker.worker02.ping_mode=A
worker.worker02.socket_timeout=10
worker.worker02.lbfactor=1
# Define the LB worker
worker.router.type=lb
worker.router.balance_workers=worker01,worker02
# Define the status worker for jkmanager
worker.status.type=status
5. Create the rewrite.properties file.
The rewrite.properties file contains simple URL rewriting rules for specific
applications. The rewritten path is specified using name-value pairs, as shown in the
example below. Place this file into the C:\connectors\ directory.
#Simple example
# Images are accessible under abc path
/app-01/abc/=/app-01/images/
Restart the IIS server.
Restart your IIS server by using the net stop and net start
commands.
C:\> net stop was /Y
C:\> net start w3svc
The IIS server is configured to send client requests to the JBoss EAP servers referenced in the
workers.properties file, spreading the load across the servers in a 1:3 ratio. This ratio is
derived from the load-balancing factor (lbfactor) assigned to each server.
21.10. ORACLE NSAPI CONNECTOR
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The Netscape Server API (NSAPI) is an API provided by Oracle iPlanet Web Server, formerly
Netscape Web Server, for implementing extensions to the server. These extensions are known as
server plugins. The NSAPI connector is used in nsapi_redirector.so, which is an extension of
mod_jk adjusted to Oracle iPlanet Web Server. The NSAPI connector enables you to configure
JBoss EAP instances as worker nodes with Oracle iPlanet Web Server as a load balancer.
Note
See the JBoss EAP supported configurations for information on the supported
configurations of Solaris and Oracle iPlanet Web Server.
21.10.1. Configure Oracle iPlanet Web Server to use the NSAPI Connector
Prerequisites
JBoss EAP is installed and configured on each server that will serve as a worker.
Download the NSAPI connector from the Red Hat Customer Portal:
1. Open a browser and log in to the Red Hat Customer Portal JBoss Software Downloads
page.
2. Select Web Connectors in the Product drop-down menu.
3. Select the latest JBoss Core Services version from the Version drop-down menu.
4. Find the Red Hat JBoss Core Services NSAPI Connector in the list, ensuring that you
select the correct platform and architecture for your system, and click the Download link.
5. Extract the nsapi_redirector.so file, which is located in either the lib/ or the lib64/
directory, into either the IPLANET_CONFIG/lib/ or the IPLANET_CONFIG/lib64/
directory.
Set up the NSAPI Connector:
Note
In these instructions, IPLANET_CONFIG refers to the Oracle iPlanet configuration
directory, which is usually /opt/oracle/webserver7/config/. If your Oracle iPlanet
configuration directory is different, modify the instructions accordingly.
1. Disable servlet mappings.
Open the IPLANET_CONFIG/default.web.xml file and locate the section with the
heading Built In Server Mappings. Disable the mappings to the following three servlets, by
wrapping them in XML comment characters ().
default
invoker
jsp
The following example configuration shows the disabled mappings.
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Save and exit the file.
2. Configure the iPlanet Web Server to load the NSAPI connector module.
Add the following lines to the end of the IPLANET_CONFIG/magnus.conf file, modifying
file paths to suit your configuration. These lines define the location of the
nsapi_redirector.so module, as well as the workers.properties file, which lists
the workers and their properties.
Init fn="load-modules" funcs="jk_init,jk_service"
shlib="/lib/nsapi_redirector.so" shlib_flags="(global|now)"
Init fn="jk_init"
worker_file="IPLANET_CONFIG/connectors/workers.properties"
log_level="info" log_file="IPLANET_CONFIG/connectors/nsapi.log"
shm_file="IPLANET_CONFIG/connectors/tmp/jk_shm"
The configuration above is for a 32-bit architecture. If you use 64-bit Solaris, change the
string lib/nsapi_redirector.so to lib64/nsapi_redirector.so.
Save and exit the file.
3. Configure the NSAPI connector.
You can configure the NSAPI connector for a basic configuration, with no load balancing, or
a load-balancing configuration. Choose one of the following options, after which your
configuration will be complete.
Configure the NSAPI Connector to Send Client Requests to JBoss EAP
Configure the NSAPI Connector to Balance Client Requests Across Multiple JBoss EAP
Servers
21.10.2. Configure the NSAPI Connector to Send Client Requests to JBoss
EAP
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This task configures the NSAPI connector to redirect client requests to JBoss EAP servers with no
load balancing or failover. The redirection is done on a per-deployment (and hence per-URL) basis.
Important
You must have already configured the NSAPI connector before continuing with this task.
Set Up the Basic HTTP Connector
1. Define the URL paths to redirect to the JBoss EAP servers.
Note
In IPLANET_CONFIG/obj.conf, spaces are not allowed at the beginning of a
line, except when the line is a continuation of the previous line.
Edit the IPLANET_CONFIG/obj.conf file. Locate the section which starts with .
The example above redirects requests to the URL path /status to the worker called
worker01, and all URL paths beneath /nc/ to the worker called worker02. The third line
indicates that all URLs assigned to the jknsapi object which are not matched by the previous
lines are served to worker01.
Save and exit the file.
3. Define the workers and their attributes.
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Create a file called workers.properties in the IPLANET_CONFIG/connectors/
directory. Paste the following contents into the file, and modify them to suit your
environment.
# An entry that lists all the workers defined
worker.list=worker01, worker02
# Entries that define the host and port associated with these
workers
worker.worker01.host=127.0.0.1
worker.worker01.port=8009
worker.worker01.type=ajp13
worker.worker02.host=127.0.0.100
worker.worker02.port=8009
worker.worker02.type=ajp13
The workers.properties file uses the same syntax as Apache mod_jk.
Save and exit the file.
4. Restart the iPlanet Web Server
Issue the following command to restart the iPlanet Web Server.
IPLANET_CONFIG/../bin/stopserv
IPLANET_CONFIG/../bin/startserv
iPlanet Web Server now sends client requests to the URLs you have configured to deployments on
JBoss EAP.
21.10.3. Configure the NSAPI Connector to Balance Client Requests Across
Multiple JBoss EAP Servers
This task configures the NSAPI connector to send client requests to JBoss EAP servers in a loadbalancing configuration.
Important
You must have already configured the NSAPI connector before continuing with this task.
Configure the Connector for Load Balancing
1. Define the URL paths to redirect to the JBoss EAP servers.
Note
In IPLANET_CONFIG/obj.conf, spaces are not allowed at the beginning of a
line, except when the line is a continuation of the previous line.
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Edit the IPLANET_CONFIG/obj.conf file. Locate the section which starts with ), add the following new section and
modify it to your needs:
This jksnapi object defines the worker nodes used to serve each path that was mapped to
the name="jksnapi" mapping in the default object. Everything except for URLs
matching /jkmanager/* is redirected to the worker called router.
3. Define the workers and their attributes.
Create a file called workers.properties in IPLANET_CONFIG/connector/. Paste the
following contents into the file, and modify them to suit your environment.
# The advanced router LB worker
# A list of each worker
worker.list=router,status
# First JBoss EAP server
# (worker node) definition.
# Port 8009 is the standard port for AJP
#
worker.worker01.port=8009
worker.worker01.host=127.0.0.1
worker.worker01.type=ajp13
worker.worker01.ping_mode=A
worker.worker01.socket_timeout=10
worker.worker01.lbfactor=3
# Second JBoss EAP server
worker.worker02.port=8009
worker.worker02.host=127.0.0.100
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worker.worker02.type=ajp13
worker.worker02.ping_mode=A
worker.worker02.socket_timeout=10
worker.worker02.lbfactor=1
# Define the load-balancer called "router"
worker.router.type=lb
worker.router.balance_workers=worker01,worker02
# Define the status worker
worker.status.type=status
The workers.properties file uses the same syntax as Apache mod_jk.
Save and exit the file.
4. Restart the iPlanet Web Server 7.0.
IPLANET_CONFIG/../bin/stopserv
IPLANET_CONFIG/../bin/startserv
The iPlanet Web Server redirects the URL patterns you have configured to your JBoss EAP servers
in a load-balancing configuration.
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APPENDIX A. REFERENCE MATERIAL
A.1. SERVER RUNTIME ARGUMENTS
The application server startup script accepts arguments and switches at runtime. This allows the
server to start under alternative configurations to those defined in the standalone.xml,
domain.xml, and host.xml configuration files.
Alternative configurations might include starting the server with an alternative socket bindings set or
a secondary configuration.
The available parameters list can be accessed by passing the help switch -h or --help at startup.
Table A.1. Runtime Switches and Arguments
Argument or Switch
Operating
Mode
Description
--admin-only
Standalone
Set the server’s running type to ADMIN_ONLY.
This will cause it to open administrative interfaces
and accept management requests, but not start
other runtime services or accept end user requests.
--admin-only
Domain
Set the host controller’s running type to
ADMIN_ONLY causing it to open administrative
interfaces and accept management requests but
not start servers or, if this host controller is the
master for the domain, accept incoming
connections from slave host controllers.
-b=, -b
Standalone,
Domain
Set system property jboss.bind.address ,
which is used in configuring the bind address for
the public interface. This defaults to 127.0.0.1 if no
value is specified. See the -b=
entry for setting the bind address for
other interfaces.
-b=
Standalone,
Domain
Set system property jboss.bind.address.
to the given value. For example,
-bmanagement=IP_ADDRESS
--backup
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Domain
Keep a copy of the persistent domain configuration
even if this host is not the Domain Controller.
APPENDIX A. REFERENCE MATERIAL
Argument or Switch
Operating
Mode
Description
-c=, -c
Standalone
Name of the server configuration file to use. The
default is standalone.xml.
-c=, -c
Domain
Name of the server configuration file to use. The
default is domain.xml.
--cached-dc
Domain
If the host is not the Domain Controller and cannot
contact the Domain Controller at boot, boot using a
locally cached copy of the domain configuration.
--debug []
Standalone
Activate debug mode with an optional argument to
specify the port. Only works if the launch script
supports it.
-D[=]
Standalone,
Domain
Set a system property.
--domain-config=
Domain
Name of the server configuration file to use. The
default is domain.xml.
-h, --help
Standalone,
Domain
Display the help message and exit.
--host-config=
Domain
Name of the host configuration file to use. The
default is host.xml.
--interprocess-hc-address=
Domain
Address on which the host controller should listen
for communication from the process controller.
--interprocess-hc-port=
Domain
Port on which the host controller should listen for
communication from the process controller.
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Argument or Switch
Operating
Mode
Description
--master-address=
Domain
Set system property
jboss.domain.master.address to the
given value. In a default slave Host Controller
config, this is used to configure the address of the
master Host Controller.
--master-port=
Domain
Set system property
jboss.domain.master.port to the given
value. In a default slave Host Controller config, this
is used to configure the port used for native
management communication by the master Host
Controller.
292
--read-only-server-config=
Standalone
Name of the server configuration file to use. This
differs from --server-config and -c in that
the original file is never overwritten.
--read-only-domain-config=
Domain
Name of the domain configuration file to use. This
differs from --domain-config and -c in that
the initial file is never overwritten.
--read-only-host-config=
Domain
Name of the host configuration file to use. This
differs from --host-config in that the initial
file is never overwritten.
-P=, -P , --properties=
Standalone,
Domain
Load system properties from the given URL.
--pc-address=
Domain
Address on which the process controller listens for
communication from processes it controls.
--pc-port=
Domain
Port on which the process controller listens for
communication from processes it controls.
-S[=]
Standalone
Set a security property.
APPENDIX A. REFERENCE MATERIAL
Argument or Switch
Operating
Mode
Description
-secmgr
Standalone,
Domain
Runs the server with a security manager installed.
--server-config=
Standalone
Name of the server configuration file to use. The
default is standalone.xml.
-u=, -u
Standalone,
Domain
Set system property
jboss.default.multicast.address,
which is used in configuring the multicast address
in the socket-binding elements in the configuration
files. This defaults to 230.0.0.4 if no value is
specified.
-v, -V, --version
Standalone,
Domain
Display the application server version and exit.
Warning
The configuration files that ship with JBoss EAP are set up to handle the behavior of the
switches (i.e. -b, -u). If you change your configuration files to no longer use the system
property controlled by the switch, then adding it to the launch command will have no
effect.
A.2. RPM SERVICE CONFIGURATION FILES
The RPM installation of JBoss EAP includes two additional configuration files compared to a ZIP or
installer installation. These files are used by the service init script to specify the JBoss EAP launch
environment. The location of these service configuration files differ for Red Hat Enterprise Linux 6
and Red Hat Enterprise Linux 7.
Table A.2. RPM Configuration Files for Red Hat Enterprise Linux 6
File
Description
/etc/sysconfig/eap7-standalone
Settings specific to standalone JBoss EAP servers on Red
Hat Enterprise Linux 6.
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File
Description
/etc/sysconfig/eap7-domain
Settings specific to JBoss EAP running as a managed domain
on Red Hat Enterprise Linux 6.
Table A.3. RPM Configuration Files for Red Hat Enterprise Linux 7
File
Description
/etc/opt/rh/eap7/wildfly/eap7standalone.conf
Settings specific to standalone JBoss EAP servers on Red
Hat Enterprise Linux 7.
/etc/opt/rh/eap7/wildfly/eap7domain.conf
Settings specific to JBoss EAP running as a managed domain
on Red Hat Enterprise Linux 7.
A.3. RPM SERVICE CONFIGURATION PROPERTIES
The following table shows a list of available configuration properties for the JBoss EAP RPM service
along with their default values.
Note
If a property has the same name in both the RPM service configuration file (for example,
/etc/sysconfig/eap7-standalone) and in the JBoss EAP startup configuration file
(for example, EAP_HOME/bin/standalone.conf), the value that takes precedence is
the one in the JBoss EAP startup configuration file. One such property is JAVA_HOME.
Table A.4. RPM Service Configuration Properties
Property
Description
JAVA_HOME
The directory where your Java Runtime Environment is installed.
Default value: /usr/lib/jvm/jre
JAVAPTH
The path where the Java executable files are installed.
Default value: $JAVA_HOME/bin
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Property
Description
WILDFLY_STARTUP_WAIT
The number of seconds that the init script will wait until confirming that
the server has launched successfully after receiving a start or restart
command. This property only applies to Red Hat Enterprise Linux 6.
Default value: 60
WILDFLY_SHUTDOWN_WA
IT
The number of seconds that the init script will wait for the server to
shutdown before continuing when it receives a stop or restart command.
This property only applies to Red Hat Enterprise Linux 6.
Default value: 20
WILDFLY_CONSOLE_LOG
The file that the CONSOLE log handler will be redirected to.
Default value:
/var/opt/rh/eap7/log/wildfly/standalone/console.l
og for a standalone server, or
/var/opt/rh/eap7/log/wildfly/domain/console.log for
a managed domain.
WILDFLY_SH
The script which is used to launch to JBoss EAP server.
Default value:
/opt/rh/eap7/root/usr/share/wildfly/bin/standalon
e.sh for a standalone server, or
/opt/rh/eap7/root/usr/share/wildfly/bin/domain.sh
for a managed domain.
WILDFLY_SERVER_CONFI
G
The server configuration file to use.
WILDFLY_HOST_CONFIG
For a managed domain, this property allows a user to specify the host
configuration file (such as host.xml). It has no value set as the default.
WILDFLY_MODULEPATH
The path of the JBoss EAP module directory.
There is no default for this property. Either standalone.xml or
domain.xml can be defined at start.
Default value:
/opt/rh/eap7/root/usr/share/wildfly/modules
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Property
Description
WILDFLY_BIND
Sets the jboss.bind.address system property, which is used to
configure the bind address for the public interface. This defaults to
0.0.0.0 if no value is specified.
A.4. OVERVIEW OF JBOSS EAP SUBSYSTEMS
The table below gives a brief description of the JBoss EAP subsystems.
JBoss EAP Subsystem
Description
batch-jberet
Configure an environment for running batch applications and manage
batch jobs.
bean-validation
Configure bean validation for validating Java object data.
datasources
Create and configure datasources and manage JDBC database drivers.
deployment-scanner
Configure deployment scanners to monitor particular locations for
applications to deploy.
ee
Configure common functionality in the Java EE platform, such as defining
global modules, enabling descriptor-based property replacement, and
configuring default bindings.
ejb3
Configure Enterprise JavaBeans (EJBs), including session and messagedriven beans.
More information for the ejb3 subsystem can be found in Developing
EJB Applications for JBoss EAP.
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iiop-openjdk
Configure Common Object Request Broker Architecture (CORBA)
services for JTS transactions and other ORB services, including security.
In JBoss EAP 6, this functionality was contained in the jacorb
subsystem.
infinispan
Configure caching functionality for JBoss EAP high availability services.
APPENDIX A. REFERENCE MATERIAL
JBoss EAP Subsystem
Description
io
Define workers and buffer pools to be used by other subsystems.
jaxrs
Enable the deployment and functionality of JAX-RS applications.
jca
Configure the general settings for the Java EE Connector Architecture
(JCA) container and resource adapter deployments.
jdr
Enable the gathering of diagnostic data to aid in troubleshooting. JBoss
EAP subscribers can provide this information to Red Hat when
requesting support.
jgroups
Configure the protocol stacks and communication mechanisms for how
servers in a cluster talk to each other.
jmx
Configure remote Java Management Extensions (JMX) access.
jpa
Manages the Java Persistence API (JPA) 2.1 container-managed
requirements and allows you to deploy persistent unit definitions,
annotations, and descriptors.
More information for the jpa subsystem can be found in the JBoss EAP
Development Guide.
jsf
Manage JavaServer Faces (JSF) implementations.
jsr77
Provide Java EE management capabilities defined by the JSR-77
specification.
logging
Configure system and application-level logging through a system of log
categories and log handlers.
mail
Configure mail server attributes and custom mail transports to create a
mail service that allows applications deployed to JBoss EAP to send mail
using that service.
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JBoss EAP Subsystem
Description
messaging-activemq
Configure JMS destinations, connection factories, and other settings for
Artemis, the integrated messaging provider. In JBoss EAP 6, messaging
functionality was contained in the messaging subsystem.
More information for the messaging-activemq subsystem can be
found in Configuring Messaging for JBoss EAP.
modcluster
Configure the server-side mod_cluster worker node.
naming
Bind entries into global JNDI namespaces and configure the remote JNDI
interface.
picketlink-federation
Configure PicketLink SAML-based single sign-on (SSO).
More information on the picketlink-federation subsystem can
be found in How To Set Up SSO with SAML v2 for JBoss EAP.
298
picketlink-identitymanagement
Configure PicketLink identity management services. This subsystem is
unsupported.
pojo
Enable deployment of applications containing JBoss Microcontainer
services, as supported by previous versions of JBoss EAP.
remoting
Configure settings for inbound and outbound connections for local and
remote services.
request-controller
Configure settings to suspend and shut down servers gracefully .
resource-adapters
Configure and maintain resource adapters for communication between
Java EE applications and an Enterprise Information System (EIS) using
the Java Connector Architecture (JCA) specification.
rts
Unsupported implementation of REST-AT.
sar
Enable deployment of SAR archives containing MBean services, as
supported by previous versions of JBoss EAP.
APPENDIX A. REFERENCE MATERIAL
JBoss EAP Subsystem
Description
security
Configure application security settings.
More information on the security subsystem can be found in Security
Architecture for JBoss EAP.
security-manager
Configure Java security policies to be used by the Java Security
Manager.
More information on the security-manager subsystem can be
found in How to Configure Server Security for JBoss EAP.
singleton
Define singleton policies to configure the behavior of singleton
deployments or to create singleton MSC services.
More information on the singleton subsystem can be found in the
JBoss EAP Development Guide.
transactions
Configure transaction manager options, such as timeout values,
transaction logging, and whether to use Java Transaction Service (JTS).
undertow
Configure JBoss EAP’s web server and servlet container settings. In
JBoss EAP 6, this functionality was contained in the web subsystem.
webservices
Configure published endpoint addresses and endpoint handler chains, as
well as the host name, ports, and WSDL address for the web services
provider.
More information for the webservices subsystem can be found in
Developing Web Services Applications for JBoss EAP.
weld
Configure Contexts and Dependency Injection (CDI) functionality for
JBoss EAP.
xts
Configure settings for coordinating web services in a transaction.
A.5. ADD-USER UTILITY ARGUMENTS
The following table describes the arguments available for the add-user.sh or add-user.bat
script, which is a utility for adding new users to the properties file for out-of-the-box authentication.
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Table A.5. Add-User Command Arguments
300
Command Line Argument
Description
-a
This argument specifies to create a user in the application realm. If
omitted, the default is to create a user in the management realm.
-dc
This argument specifies the domain configuration directory that will
contain the properties files. If it is omitted, the default directory is
EAP_HOME/domain/configuration/.
-sc
This argument specifies an alternative standalone server
configuration directory that will contain the properties files. If it is
omitted, the default directory is
EAP_HOME/standalone/configuration/.
-up, --user-properties
This argument specifies the name of the alternative user properties
file. It can be an absolute path or it can be a file name used in
conjunction with the -sc or -dc argument that specifies the
alternative configuration directory.
-g, --group
A comma-separated list of groups to assign to this user.
-gp, --group-properties
This argument specifies the name of the alternative group properties
file. It can be an absolute path or it can be a file name used in
conjunction with the -sc or -dc argument that specifies the
alternative configuration directory.
-p, --password
The password of the user.
-u, --user
The name of the user. Only alphanumeric characters and the
following symbols are valid: ,./=@\.
-r, --realm
The name of the realm used to secure the management interfaces. If
omitted, the default is ManagementRealm.
-s, --silent
Run the add-user script with no output to the console.
APPENDIX A. REFERENCE MATERIAL
Command Line Argument
Description
-e, --enable
Enable the user.
-d, --disable
Disable the user.
-cw, --confirm-warning
Automatically confirm warning in interactive mode.
-h, --help
Display usage information for the add-user script.
A.6. MANAGEMENT AUDIT LOGGING ATTRIBUTES
Logger Attributes
Attribute
Description
enabled
Whether audit logging is enabled.
log-boot
Whether operations should be logged on server boot.
log-read-only
Whether operations that do not modify the configuration or any
runtime services should be logged.
Log Formatter Attributes
Attribute
Description
compact
If true, it will format the JSON on one line. There may still be
values containing new lines, so if having the whole record on one
line is important, set escape-new-line or escape-controlcharacters to true.
date-format
The date format to use as understood by
java.text.SimpleDateFormat. This is ignored if
include-date is set to false.
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Attribute
Description
date-separator
The separator between the date and the rest of the formatted log
message. This is ignored if include-date is set to false.
escape-control-characters
If true, it will escape all control characters (ASCII entries with a
decimal value greater than 32) with the ASCII code in octal. For
example, a new line becomes #012. If true, this will override
escape-new-line=false.
escape-new-line
If true, it will escape all new lines with the ASCII code in octal:
#012.
include-date
Whether or not to include the date in the formatted log record.
File Handler Attributes
302
Attribute
Description
disabled-due-to-failure
Whether this handler has been disabled due to logging failures
(read-only).
failure-count
The number of logging failures since the handler was initialized
(read-only).
formatter
The JSON formatter used to format the log messages.
max-failure-count
The maximum number of logging failures before disabling this
handler.
path
The path of the audit log file.
relative-to
The name of another previously named path, or of one of the
standard paths provided by the system. If relative-to is
provided, the value of the path attribute is treated as relative to the
path specified by this attribute.
APPENDIX A. REFERENCE MATERIAL
Syslog Handler Attributes
Syslog servers vary in their implementation, so not all settings are applicable to all syslog servers.
Testing has been conducted using the rsyslog syslog implementation.
This table lists only the high-level attributes. Each attribute has configuration parameters, and some
have child configuration parameters.
Attribute
Description
app-name
The application name to add to the syslog records as defined in
section 6.2.5 of RFC-5424. If not specified it will default to the name
of the product.
disabled-due-to-failure
Whether this handler has been disabled due to logging failures
(read-only).
facility
The facility to use for syslog logging as defined in section 6.2.1 of
RFC-5424 and section 4.1.1 of RFC-3164.
failure-count
The number of logging failures since the handler was initialized
(read-only).
formatter
The JSON formatter used to format the log messages.
max-failure-count
The maximum number of logging failures before disabling this
handler.
max-length
The maximum length in bytes a log message, including the header,
is allowed to be. If undefined, it will default to 1024 bytes if the
syslog-format is RFC3164, or 2048 bytes if the syslogformat is RFC5424.
protocol
The protocol to use for the syslog handler. Must be one and only one
of udp, tcp or tls.
syslog-format
The syslog format: RFC5424 or RFC3164.
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Attribute
Description
truncate
Whether or not a message, including the header, should truncate
the message if the length in bytes is greater than the value of the
max-length attribute. If set to false, messages will be split and
sent with the same header values.
A.7. INTERFACE ATTRIBUTES
Table A.6. Interface Attributes and Values
304
Interface Element
Description
any
Element indicating that part of the selection criteria for an interface
should be that it meets at least one, but not necessarily all, of the
nested set of criteria.
any-address
Empty element indicating that sockets using this interface should be
bound to a wildcard address. The IPv6 wildcard address (::) will be
used unless the java.net.preferIPv4Stack system
property is set to true, in which case the IPv4 wildcard address
(0.0.0.0) will be used. If a socket is bound to an IPv6 anylocal
address on a dual-stack machine, it can accept both IPv6 and IPv4
traffic; if it is bound to an IPv4 (IPv4-mapped) anylocal address, it
can only accept IPv4 traffic.
inet-address
Either an IP address in IPv6 or IPv4 dotted decimal notation, or a
host name that can be resolved to an IP address.
link-local-address
Empty element indicating that part of the selection criteria for an
interface should be whether or not an address associated with it is
link-local.
loopback
Empty element indicating that part of the selection criteria for an
interface should be whether or not it is a loopback interface.
APPENDIX A. REFERENCE MATERIAL
Interface Element
Description
loopback-address
A loopback address that may not actually be configured on the
machine’s loopback interface. Differs from inet-address type in that
the given value will be used even if no NIC can be found that has
the IP address associated with it.
multicast
Empty element indicating that part of the selection criteria for an
interface should be whether or not it supports multicast.
nic
The name of a network interface (e.g. eth0, eth1, lo).
nic-match
A regular expression against which the names of the network
interfaces available on the machine can be matched to find an
acceptable interface.
not
Element indicating that part of the selection criteria for an interface
should be that it does not meet any of the nested set of criteria.
point-to-point
Empty element indicating that part of the selection criteria for an
interface should be whether or not it is a point-to-point interface.
public-address
Empty element indicating that part of the selection criteria for an
interface should be whether or not it has a publicly routable address.
site-local-address
Empty element indicating that part of the selection criteria for an
interface should be whether or not an address associated with it is
site-local.
subnet-match
A network IP address and the number of bits in the address' network
prefix, written in slash notation (e.g. 192.168.0.0/16).
up
Empty element indicating that part of the selection criteria for an
interface should be whether or not it is currently up.
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Interface Element
Description
virtual
Empty element indicating that part of the selection criteria for an
interface should be whether or not it is a virtual interface.
A.8. SOCKET BINDING ATTRIBUTES
Table A.7. Socket Binding Attributes
306
Attribute
Description
client-mappings
Specifies the client mappings for this socket binding. A client connecting to this
socket should use the destination address specified in the mapping that
matches its desired outbound interface. This allows for advanced network
topologies that use either network address translation, or have bindings on
multiple network interfaces to function. Each mapping should be evaluated in
declared order, with the first successful match used to determine the
destination.
fixed-port
Whether the port value should remain fixed even if numeric offsets are applied
to the other sockets in the socket group.
interface
Name of the interface to which the socket should be bound, or, for multicast
sockets, the interface on which it should listen. This should be one of the
declared interfaces. If not defined, the value of the default-interface
attribute from the enclosing socket binding group will be used.
multicast-address
Multicast address on which the socket should receive multicast traffic. If
unspecified, the socket will not be configured to receive multicast.
multicast-port
Port on which the socket should receive multicast traffic. Must be configured if
'multicast-address' is configured.
name
The name of the socket. Services needing to access the socket configuration
information will find it using this name. This attribute is required.
port
Number of the port to which the socket should be bound. Note that this value
can be overridden if servers apply a port-offset to increment or decrement all
port values.
APPENDIX A. REFERENCE MATERIAL
A.9. DEFAULT SOCKET BINDINGS
Table A.8. Default Socket Bindings
Name
Port
ajp
Description
Socket Binding
Groups
8009
Apache JServ Protocol. Used for
HTTP clustering and load
balancing.
standard-sockets,
ha-sockets, fullsockets, full-hasockets
http
8080
The default port for deployed web
applications.
standard-sockets,
ha-sockets, fullsockets, full-hasockets
https
8443
SSL-encrypted connection
between deployed web
applications and clients.
standard-sockets,
ha-sockets, fullsockets, full-hasockets
iiop
3528
CORBA services for JTS
transactions and other ORBdependent services.
full-sockets, full-hasockets
iiop-ssl
3529
SSL-encrypted CORBA services.
full-sockets, full-hasockets
Multicast. Used to discover initial
membership in a HA cluster.
ha-sockets, full-hasockets
jgroups-mping
Multicas
t Port
45700
jgroups-tcp
7600
Unicast peer discovery in HA
clusters using TCP.
ha-sockets, full-hasockets
jgroups-tcp-fd
57600
Used for HA failure detection over
TCP.
ha-sockets, full-hasockets
jgroups-udp
55200
Multicast peer discovery in HA
clusters using UDP.
ha-sockets, full-hasockets
45688
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Name
Port
jgroups-udp-fd
Description
Socket Binding
Groups
54200
Used for HA failure detection over
UDP.
ha-sockets, full-hasockets
management-http
9990
Used for HTTP communication
with the management layer.
standard-sockets,
ha-sockets, fullsockets, full-hasockets
managementhttps
9993
Used for HTTPS communication
with the management layer.
standard-sockets,
ha-sockets, fullsockets, full-hasockets
Multicast port for communication
between JBoss EAP and the
HTTP load balancer.
ha-sockets, full-hasockets
modcluster
Multicas
t Port
23364
txn-recoveryenvironment
4712
The JTA transaction recovery
manager.
standard-sockets,
ha-sockets, fullsockets, full-hasockets
txn-statusmanager
4713
The JTA / JTS transaction
manager.
standard-sockets,
ha-sockets, fullsockets, full-hasockets
A.10. DEPLOYMENT SCANNER MARKER FILES
Marker files are used by the deployment scanner to mark the status of an application within the
deployment directory of the JBoss EAP server instance. A marker file has the same name as the
deployment, with the file suffix indicating the state of the application’s deployment.
For example, a successful deployment of test-application.war would have a marker file
named test-application.war.deployed.
The following table lists the available marker file types and their meanings.
Table A.9. Marker File Types
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Filename Suffix
Origin
Description
.deployed
Systemgenerated
Indicates that the content has been deployed. The content will
be undeployed if this file is deleted.
.dodeploy
User-generated
Indicates that the content should be deployed or redeployed.
.failed
Systemgenerated
Indicates deployment failure. The marker file contains
information about the cause of failure. If the marker file is
deleted, the content will be eligible for auto-deployment again.
.isdeploying
Systemgenerated
Indicates that the deployment is in progress. This marker file
will be deleted upon completion.
.isundeploying
Systemgenerated
Triggered by deleting a .deployed file, this indicates that
the content is being undeployed. This marker file will be
deleted upon completion.
.pending
Systemgenerated
Indicates that the deployment scanner recognizes the need to
deploy content, but an issue is currently preventing autodeployment (for example, if content is in the process of being
copied). This marker serves as a global deployment roadblock, meaning that the scanner will not instruct the server to
deploy or undeploy any content while this marker file exists.
.skipdeploy
User-generated
Disables auto-deploy of an application while present. Useful
as a method of temporarily blocking the auto-deployment of
exploded content, preventing the risk of incomplete content
edits being pushed. Can be used with zipped content,
although the scanner detects in-progress changes to zipped
content and waits until completion.
.undeployed
Systemgenerated
Indicates that the content has been undeployed. Deletion of
this marker file has no impact to content redeployment.
A.11. DEPLOYMENT SCANNER ATTRIBUTES
The deployment scanner contains the following configurable attributes.
Table A.10. Deployment Scanner Attributes
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Name
Default
Description
auto-deploy-exploded
false
Allows the automatic deployment of exploded
content without requiring a .dodeploy marker
file. Recommended for only basic development
scenarios to prevent exploded application
deployment from occurring during changes by the
developer or operating system.
auto-deploy-xml
true
Allows the automatic deployment of XML content
without requiring a .dodeploy marker file.
auto-deploy-zipped
true
Allows the automatic deployment of zipped content
without requiring a .dodeploy marker file.
deployment-timeout
600
The time value in seconds for the deployment
scanner to allow a deployment attempt before
being cancelled.
path
deployments
The actual file system path to be scanned. Treated
as an absolute path, unless the relative-to
attribute is specified, in which case the value is
treated as relative to that path.
relative-to
jboss.server.base.
dir
Reference to a file system path defined by path.
runtime-failure-causesrollback
false
Whether a runtime failure of a deployment causes a
rollback of the deployment as well as all other
(possibly unrelated) deployments as part of the
scan operation.
scan-enabled
true
Allows the automatic scanning for applications by
scan-interval and at startup.
scan-interval
5000
The time interval in milliseconds that the repository
should be scanned for changes. A value of less
than 1 causes the scan to occur only at initial
startup.
A.12. ROOT LOGGER ATTRIBUTES
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Table A.11. Root Logger Attributes
Attribute
Description
filter
Defines a simple filter type. Deprecated in favor of filter-spec .
filter-spec
An expression value that defines a filter. The following expression defines a
filter that excludes log entries that do not match a pattern:
not(match("WFLY.*"))
handlers
A list of log handlers that are used by the root logger.
level
The lowest level of log message that the root logger records.
Note
A filter-spec specified for the root logger is not inherited by other handlers. Instead a
filter-spec must be specified per handler.
A.13. LOG CATEGORY ATTRIBUTES
Table A.12. Log Category Attributes
Attribute
Description
category
The log category from which log messages will be captured.
filter
Defines a simple filter type. Deprecated in favor of filter-spec .
filter-spec
An expression value that defines a filter. The following expression defines a
filter that does not match a pattern: not(match("WFLY.*"))
handlers
A list of log handlers associated with the logger.
level
The lowest level of log message that the log category records.
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Attribute
Description
use-parent-handlers
If set to true, this category will use the log handlers of the root logger in
addition to any other assigned handlers.
A.14. LOG HANDLER ATTRIBUTES
Table A.13. Console Log Handler Attributes
312
Attribute
Description
autoflush
If set to true, the log messages will be sent to the handlers assigned file
immediately upon receipt.
enabled
If set to true, the handler is enabled and functioning as normal. If set to
false, the handler is ignored when processing log messages.
encoding
The character encoding scheme to be used for the output.
filter
Defines a simple filter type. Deprecated in favor of filter-spec .
filter-spec
An expression value that defines a filter. The following expression defines a
filter that does not match a pattern: not(match("WFLY.*"))
formatter
The log formatter used by this log handler.
level
The lowest level of log message the log handler records.
name
The name of the log handler. Deprecated since the handler’s address contains
the name.
named-formatter
The name of the defined formatter to be used on the handler.
APPENDIX A. REFERENCE MATERIAL
Attribute
Description
target
The system output stream where the output of the log handler goes. This can
be System.err or System.out for the system error stream or standard out
stream respectively.
Table A.14. File Log Handler Attributes
Attribute
Description
append
If set to true, all messages written by this handler will be appended to the file
if it already exists. If set to false, a new file will be created each time the
application server launches.
autoflush
If set to true, the log messages will be sent to the handlers assigned file
immediately upon receipt.
enabled
If set to true, the handler is enabled and functioning as normal. If set to
false, the handler is ignored when processing log messages.
encoding
The character encoding scheme to be used for the output.
file
The object that represents the file where the output of this log handler is written
to. It has two configuration properties, relative-to and path.
filter
Defines a simple filter type. Deprecated in favor of filter-spec .
filter-spec
An expression value that defines a filter. The following expression defines a
filter that does not match a pattern: not(match("WFLY.*"))
formatter
The log formatter used by this log handler.
level
The lowest level of log message the log handler records.
name
The name of the log handler. Deprecated since the handler’s address contains
the name.
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Attribute
Description
named-formatter
The name of the defined formatter to be used on the handler.
Table A.15. Periodic Log Handler Attributes
314
Attribute
Description
append
If set to true, all messages written by this handler will be appended to the file
if it already exists. If set to false, a new file will be created each time the
application server launches.
autoflush
If set to true, the log messages will be sent to the handlers assigned file
immediately upon receipt.
enabled
If set to true, the handler is enabled and functioning as normal. If set to
false, the handler is ignored when processing log messages.
encoding
The character encoding scheme to be used for the output.
file
Object that represents the file to which the output of this log handler is written.
It has two configuration properties, relative-to and path.
filter
Defines a simple filter type. Deprecated in favor of filter-spec .
filter-spec
An expression value that defines a filter. The following expression defines a
filter that does not match a pattern: not(match("WFLY.*")).
formatter
The log formatter used by this log handler.
level
The lowest level of log message the log handler records.
name
The name of the log handler. Deprecated since the handler’s address contains
the name.
APPENDIX A. REFERENCE MATERIAL
Attribute
Description
named-formatter
The name of the defined formatter to be used on the handler.
suffix
This string is included in the suffix appended to rotated logs. The format of the
suffix is a dot ( . ) followed by a date string which is able to be parsed by the
SimpleDateFormat class.
Table A.16. Size Log Handler Attributes
Attribute
Description
append
If set to true, all messages written by this handler will be appended to the file
if it already exists. If set to false, a new file will be created each time the
application server launches.
autoflush
If set to true the log messages will be sent to the handlers assigned file
immediately upon receipt.
enabled
If set to true, the handler is enabled and functioning as normal. If set to
false, the handler is ignored when processing log messages.
encoding
The character encoding scheme to be used for the output.
file
Object that represents the file where the output of this log handler is written to.
It has two configuration properties, relative-to and path.
filter
Defines a simple filter type. Deprecated in favor of filter-spec .
filter-spec
An expression value that defines a filter. The following expression defines a
filter that does not match a pattern: not(match("WFLY.*"))
formatter
The log formatter used by this log handler.
level
The lowest level of log message the log handler records.
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Attribute
Description
max-backup-index
The maximum number of rotated logs that are kept. When this number is
reached, the oldest log is reused. The default is 1 .
If the suffix attribute is used, the suffix of rotated log files is included in the
rotation algorithm. When the log file is rotated, the oldest file whose name
starts with name+suffix is deleted, the remaining rotated log files have
their numeric suffix incremented and the newly rotated log file is given the
numeric suffix 1 .
name
The name of the log handler. Deprecated since the handler’s address contains
the name.
named-formatter
The name of the defined formatter to be used on the handler.
rotate-on-boot
If set to true, a new log file will be created on server restart. The default is
false.
rotate-size
The maximum size that the log file can reach before it is rotated. A single
character appended to the number indicates the size units: b for bytes, k for
kilobytes, m for megabytes, g for gigabytes. For example, 50m for 50
megabytes.
suffix
This string is included in the suffix appended to rotated logs. The format of the
suffix is a dot ( . ) followed by a date string which is able to be parsed by the
SimpleDateFormat class.
Table A.17. Periodic Size Log Handler Attributes
316
Attribute
Description
append
If set to true, all messages written by this handler will be appended to the file
if it already exists. If set to false, a new file will be created each time the
application server launches.
autoflush
If set to true, the log messages will be sent to the handlers assigned file
immediately upon receipt.
APPENDIX A. REFERENCE MATERIAL
Attribute
Description
enabled
If set to true, the handler is enabled and functioning as normal. If set to
false, the handler is ignored when processing log messages.
encoding
The character encoding scheme to be used for the output.
file
Object that represents the file where the output of this log handler is written to.
It has two configuration properties, relative-to and path.
filter-spec
An expression value that defines a filter. The following expression defines a
filter that does not match a pattern: not(match("WFLY.*"))
formatter
The log formatter used by this log handler.
level
The lowest level of log message the log handler records.
max-backup-index
The maximum number of rotated logs that are kept. When this number is
reached, the oldest log is reused. The default is 1 .
If the suffix attribute is used, the suffix of rotated log files is included in the
rotation algorithm. When the log file is rotated, the oldest file whose name
starts with name+suffix is deleted, the remaining rotated log files have
their numeric suffix incremented and the newly rotated log file is given the
numeric suffix 1 .
name
The name of the log handler. Deprecated since the handler’s address contains
the name.
named-formatter
The name of the defined formatter to be used on the handler.
rotate-on-boot
If set to true, a new log file will be created on server restart. The default is
false.
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Attribute
Description
rotate-size
The maximum size that the log file can reach before it is rotated. A single
character appended to the number indicates the size units: b for bytes, k for
kilobytes, m for megabytes, g for gigabytes. For example, 50m for 50
megabytes.
suffix
This string is included in the suffix appended to rotated logs. The format of the
suffix is a dot ( . ) followed by a date string which is able to be parsed by the
SimpleDateFormat class.
Table A.18. Syslog Handler Attributes
Attribute
Description
app-name
The app name used when formatting the message in RFC5424 format. By
default the app name is java.
enabled
If set to true, the handler is enabled and functioning as normal. If set to
false, the handler is ignored when processing log messages.
facility
The facility as defined by RFC-5424 and RFC-3164.
hostname
The name of the host from which the messages are being sent. For example,
the name of the host the application server is running on.
level
The lowest level of log message the log handler records.
port
The port on which the syslog server is listening.
server-address
The address of the syslog server.
syslog-format
Formats the log message according to the RFC specification.
Table A.19. Custom Log Handler Attributes
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Attribute
Description
class
The logging handler class to be used.
enabled
If set to true, the handler is enabled and functioning as normal. If set to
false, the handler is ignored when processing log messages.
encoding
The character encoding scheme to be used for the output.
filter
Defines a simple filter type. Deprecated in favor of filter-spec .
filter-spec
An expression value that defines a filter. The following expression defines a
filter that does not match a pattern: not(match("WFLY.*"))
formatter
The log formatter used by this log handler.
level
The lowest level of log message the log handler records.
module
The module one which the logging handler depends.
name
The name of the log handler. Deprecated since the handler’s address contains
the name.
named-formatter
The name of the defined formatter to be used on the handler.
properties
The properties used for the logging handler.
Table A.20. Async Log Handler Attributes
Attribute
Description
enabled
If set to true, the handler is enabled and functioning as normal. If set to
false, the handler is ignored when processing log messages.
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Attribute
Description
filter
Defines a simple filter type. Deprecated in favor of filter-spec .
filter-spec
An expression value that defines a filter. The following expression defines a
filter that does not match a pattern: not(match("WFLY.*"))
level
The lowest level of log message the log handler records.
name
The name of the log handler. Deprecated since the handler’s address contains
the name.
overflow-action
How this handler responds when its queue length is exceeded. This can be
set to BLOCK or DISCARD. BLOCK makes the logging application wait until
there is available space in the queue. This is the same behavior as an nonasync log handler. DISCARD allows the logging application to continue but the
log message is deleted.
queue-length
Maximum number of log messages that will be held by this handler while
waiting for sub-handlers to respond.
subhandlers
The list of log handlers to which this async handler passes its log messages.
A.15. DATASOURCE CONNECTION URLS
Table A.21. Datasource Connection URLs
320
Datasource
Connection URL
IBM DB2
jdbc:db2://SERVER_NAME:PORT/DATABASE_NAME
MariaDB
jdbc:mariadb://SERVER_NAME:PORT/DATABASE_NAME
Microsoft SQL Server
jdbc:sqlserver://SERVER_NAME:PORT;DatabaseName=DATABASE_N
AME
APPENDIX A. REFERENCE MATERIAL
Datasource
Connection URL
MySQL
jdbc:mysql://SERVER_NAME:PORT/DATABASE_NAME
Oracle
jdbc:oracle:thin:@SERVER_NAME:PORT:ORACLE_SID
PostgreSQL
jdbc:postgresql://SERVER_NAME:PORT/DATABASE_NAME
Sybase
jdbc:sybase:Tds:SERVER_NAME:PORT/DATABASE_NAME
A.16. DATASOURCE PARAMETERS
Table A.22. Datasource Parameters
Parameter
Datasource Type
Description
allocation-retry
Non-XA, XA
The number of times that allocating a connection
should be tried before throwing an exception. The
default is 0 , so an exception is thrown upon the
first failure.
allocation-retry-wait-millis
Non-XA, XA
The amount of time, in milliseconds, to wait
between retrying to allocate a connection. The
default is 5000 ms.
allow-multiple-users
Non-XA, XA
Whether multiple users will access the datasource
through the getConnection(user,
password) method and if the internal pool type
accounts for this behavior.
background-validation
Non-XA, XA
Whether connections should be validated on a
background thread versus being validated prior to
use. Background validation is typically not to be
used with validate-on-match or there will be
redundant checks. With background validation,
there is an opportunity for a connection to go bad
between the time of the validations can and being
handed to the client, so the application must
account for this possibility.
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Parameter
Datasource Type
Description
background-validation-millis
Non-XA, XA
The frequency, in milliseconds, that background
validation will run.
blocking-timeout-wait-millis
Non-XA, XA
The maximum time, in milliseconds, to block while
waiting for a connection before throwing an
exception. Note that this blocks only while waiting
for locking a connection, and will never throw an
exception if creating a new connection takes an
inordinately long time.
capacity-decrementer-class
Non-XA, XA
Class defining the policy for decrementing
connections in the pool.
capacity-decrementerproperties
Non-XA, XA
Properties to be injected in the class defining the
policy for decrementing connections in the pool.
capacity-incrementer-class
Non-XA, XA
Class defining the policy for incrementing
connections in the pool.
capacity-incrementerproperties
Non-XA, XA
Properties to be injected in the class defining the
policy for incrementing connections in the pool.
check-valid-connection-sql
Non-XA, XA
An SQL statement to check validity of a pool
connection. This may be called when a managed
connection is obtained from the pool.
connectable
Non-XA, XA
Enable the use of CMR, which means that a local
resource can reliably participate in an XA
transaction.
connection-listener-class
Non-XA, XA
Specifies class name extending
org.jboss.jca.adapters.jdbc.spi.li
stener.ConnectionListener. This class
listens for connection activation and passivation in
order to perform actions before the connection is
returned to the application or to the pool. The
specified class must be bundled together with the
JDBC driver in one module using two resource jars
(Install a JDBC Driver as a Core Module ), or in
separate global module (Define Global Modules ).
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Parameter
Datasource Type
Description
connection-listener-property
Non-XA, XA
Properties to be injected into the class specified in
the connection-listener-class. The
properties injected are compliant with the
JavaBeans conventions. For example, if you
specify a property named foo, then the connection
listener class needs to have a method setFoo
that accepts String as argument.
connection-properties
Non-XA Only
Arbitrary string name/value pair connection
properties to pass to the
Driver.connect(url, props) method.
connection-url
Non-XA Only
The JDBC driver connection URL.
datasource-class
Non-XA Only
The fully-qualified name of the JDBC datasource
class.
driver-class
Non-XA Only
The fully-qualified name of the JDBC driver class.
driver-name
Non-XA, XA
Defines the JDBC driver the datasource should
use. It is a symbolic name matching the name of
installed driver. If the driver is deployed as JAR,
the name is the name of the deployment.
enabled
Non-XA, XA
Whether the datasource should be enabled.
enlistment-trace
Non-XA, XA
Whether enlistment traces should be recorded.
exception-sorter-class-name
Non-XA, XA
An instance of
org.jboss.jca.adapters.jdbc.Except
ionSorter that provides a method to validate if
an exception should broadcast an error.
exception-sorter-properties
Non-XA, XA
The exception sorter properties.
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Parameter
Datasource Type
Description
flush-strategy
Non-XA, XA
Specifies how the pool should be flush in case of
an error. Valid values are:
FailingConnectionOnly (default)
IdleConnections
EntirePool
idle-timeout-minutes
Non-XA, XA
The maximum time, in minutes, a connection may
be idle before being closed. The actual maximum
time also depends on the IdleRemover scan time,
which is half of the smallest idle-timeout-minutes
value of any pool.
initial-pool-size
Non-XA, XA
The initial number of connections a pool should
hold.
interleaving
XA Only
Whether to enable interleaving for XA connections.
jndi-name
Non-XA, XA
The unique JNDI name for the datasource.
jta
Non-XA Only
Enable JTA integration.
max-pool-size
Non-XA, XA
The maximum number of connections that a pool
can hold.
mcp
Non-XA, XA
The ManagedConnectionPool
implementation. For example,
org.jboss.jca.core.connectionmanag
er.pool.mcp.SemaphoreArrayListMana
gedConnectionPool
324
min-pool-size
Non-XA, XA
The minimum number of connections that a pool
can hold.
new-connection-sql
Non-XA, XA
An SQL statement to execute whenever a
connection is added to the connection pool.
APPENDIX A. REFERENCE MATERIAL
Parameter
Datasource Type
Description
no-recovery
XA Only
Whether the connection pool should be excluded
from recovery.
no-tx-separate-pool
XA Only
Whether to create a separate sub-pool for each
context. This may be required for some Oracle
datasources, which may not allow XA connections
to be used both inside and outside of a JTA
transaction. Using this option will cause your total
pool size to be twice the max-pool-size ,
because two actual pools will be created.
pad-xid
XA Only
Whether to pad the Xid.
password
Non-XA, XA
The password to use when creating a new
connection.
pool-fair
Non-XA, XA
Defines if pool should be fair. This setting is part of
a Semaphore class used to manage the
connection pools in JCA, which provides a
performance benefit in some use cases where the
order of leasing connections is not required.
pool-prefill
Non-XA, XA
Whether the pool should be prefilled.
pool-use-strict-min
Non-XA, XA
Whether min-pool-size should be considered
strictly.
prepared-statements-cachesize
Non-XA, XA
The number of prepared statements per
connection in a Least Recently Used (LRU) cache.
query-timeout
Non-XA, XA
The timeout for queries, in seconds. The default is
no timeout.
reauth-plugin-class-name
Non-XA, XA
The fully-qualified class name of the
reauthentication plugin implementation to
reauthenticate physical connections.
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Parameter
Datasource Type
Description
reauth-plugin-properties
Non-XA, XA
The properties for the reauthentication plugin.
recovery-password
XA Only
The password to use to connect to the resource for
recovery.
recovery-plugin-class-name
XA Only
The fully-qualified class name of the recovery
plugin implementation.
recovery-plugin-properties
XA Only
The properties for the recovery plugin.
recovery-security-domain
XA Only
The security domain to use to connect to the
resource for recovery.
recovery-username
XA Only
The user name to use to connect to the resource
for recovery.
same-rm-override
XA Only
Whether the
javax.transaction.xa.XAResource.is
SameRM(XAResource) class returns true or
false.
326
security-domain
Non-XA, XA
The name of a JAAS security-manager which
handles authentication. This name correlates to
the application-policy/name attribute of the JAAS
login configuration.
set-tx-query-timeout
Non-XA, XA
Whether to set the query timeout based on the
time remaining until transaction timeout. Any
configured query timeout will be used if no
transaction exists.
share-prepared-statements
Non-XA, XA
Whether asking for the same statement twice
without closing it uses the same underlying
prepared statement.
APPENDIX A. REFERENCE MATERIAL
Parameter
Datasource Type
Description
spy
Non-XA, XA
Enable spy functionality on the JDBC layer. This
logs all JDBC traffic to the datasource. Note that
the logging category jboss.jdbc.spy must
also be set to the log level DEBUG in the logging
subsystem.
stale-connection-checkerclass-name
Non-XA, XA
An instance of
org.jboss.jca.adapters.jdbc.StaleC
onnectionChecker that provides an
isStaleConnection(SQLException)
method. If this method returns true, then the
exception is wrapped in an
org.jboss.jca.adapters.jdbc.StaleC
onnectionException .
stale-connection-checkerproperties
Non-XA, XA
The stale connection checker properties.
statistics-enabled
Non-XA, XA
Whether runtime statistics are enabled. The default
is false.
track-statements
Non-XA, XA
Whether to check for unclosed statements when a
connection is returned to a pool and a statement is
returned to the prepared statement cache. If false,
statements are not tracked. Valid values:
true: Statements and result sets are tracked,
and a warning is issued if they are not closed.
false: Neither statements or result sets are
tracked.
nowarn : Statements are tracked but no
warning is issued (default).
tracking
Non-XA, XA
Whether to track connection handles across
transaction boundaries.
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Parameter
Datasource Type
Description
transaction-isolation
Non-XA, XA
The java.sql.Connection transaction
isolation level. Valid values:
TRANSACTION_READ_UNCOMMITTED
TRANSACTION_READ_COMMITTED
TRANSACTION_REPEATABLE_READ
TRANSACTION_SERIALIZABLE
TRANSACTION_NONE
328
url-delimiter
Non-XA, XA
The delimiter for URLs in connection-url for High
Availability (HA) datasources.
url-property
XA Only
The property for the URL property in the xadatasource-property values.
url-selector-strategy-classname
Non-XA, XA
A class that implements
use-ccm
Non-XA, XA
Enable the cached connection manager.
use-fast-fail
Non-XA, XA
If true, fail a connection allocation on the first
attempt if the connection is invalid. If false, keep
trying until the pool is exhausted.
use-java-context
Non-XA, XA
Whether to bind the datasource into global JNDI.
use-try-lock
Non-XA, XA
A timeout value for internal locks. This attempts to
obtain the lock for the configured number of
seconds, before timing out, rather than failing
immediately if the lock is unavailable. Uses
tryLock() instead of lock() .
user-name
Non-XA, XA
The user name to use when creating a new
connection.
org.jboss.jca.adapters.jdbc.URLSel
ectorStrategy.
APPENDIX A. REFERENCE MATERIAL
Parameter
Datasource Type
Description
valid-connection-checkerclass-name
Non-XA, XA
An implementation of
org.jboss.jca.adaptors.jdbc.ValidC
onnectionChecker which provides a
SQLException.isValidConnection(Con
nection e) method to validate a connection. An
exception means the connection is destroyed. This
overrides the parameter check-validconnection-sql if it is present.
valid-connection-checkerproperties
Non-XA, XA
The valid connection checker properties.
validate-on-match
Non-XA, XA
Whether connection validation is performed when a
connection factory attempts to match a managed
connection. This should be used when a client
must have a connection validated prior to use.
Validate-on-match is typically not to be used with
background-validation or there will be
redundant checks.
wrap-xa-resource
XA Only
Whether to wrap the XAResource in an
org.jboss.tm.XAResourceWrapper
instance.
xa-datasource-class
XA Only
The fully-qualified name of the
javax.sql.XADataSource implementation
class.
xa-datasource-properties
XA Only
String name/value pair of XA datasource
properties.
xa-resource-timeout
XA Only
If non-zero, this value is passed to the
XAResource.setTransactionTimeout
method.
A.17. DATASOURCE STATISTICS
Table A.23. Core Pool Statistics
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330
Name
Description
ActiveCount
The number of active connections. Each of the connections is
either in use by an application or available in the pool.
AvailableCount
The number of available connections in the pool.
AverageBlockingTime
The average time spent blocking on obtaining an exclusive
lock on the pool. This value is in milliseconds.
AverageCreationTime
The average time spent creating a connection. This value is in
milliseconds.
AverageGetTime
The average time spent obtaining a connection.
AverageUsageTime
The average time spent using a connection.
BlockingFailureCount
The number of failures trying to obtain a connection.
CreatedCount
The number of connections created.
DestroyedCount
The number of connections destroyed.
IdleCount
The number of connections that are currently idle.
InUseCount
The number of connections currently in use.
MaxCreationTime
The maximum time it took to create a connection. This value
is in milliseconds.
MaxGetTime
The maximum time for obtaining a connection.
MaxPoolTime
The maximum time for a connection in the pool.
APPENDIX A. REFERENCE MATERIAL
Name
Description
MaxUsageTime
The maximum time using a connection.
MaxUsedCount
The maximum number of connections used.
MaxWaitCount
The maximum number of requests waiting for a connection at
the same time.
MaxWaitTime
The maximum time spent waiting for an exclusive lock on the
pool.
TimedOut
The number of timed out connections.
TotalBlockingTime
The total time spent waiting for an exclusive lock on the pool.
This value is in milliseconds.
TotalCreationTime
The total time spent creating connections. This value is in
milliseconds.
TotalGetTime
The total time spent obtaining connections.
TotalPoolTime
The total time spent by connections in the pool.
TotalUsageTime
The total time spent using connections.
WaitCount
The number of requests that had to wait to obtain a
connection.
XACommitAverageTime
The average time for an XAResource commit invocation.
XACommitCount
The number of XAResource commit invocations.
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332
Name
Description
XACommitMaxTime
The maximum time for an XAResource commit invocation.
XACommitTotalTime
The total time for all XAResource commit invocations.
XAEndAverageTime
The average time for an XAResource end invocation.
XAEndCount
The number of XAResource end invocations.
XAEndMaxTime
The maximum time for an XAResource end invocation.
XAEndTotalTime
The total time for all XAResource end invocations.
XAForgetAverageTime
The average time for an XAResource forget invocation.
XAForgetCount
The number of XAResource forget invocations.
XAForgetMaxTime
The maximum time for an XAResource forget invocation.
XAForgetTotalTime
The total time for all XAResource forget invocations.
XAPrepareAverageTime
The average time for an XAResource prepare invocation.
XAPrepareCount
The number of XAResource prepare invocations.
XAPrepareMaxTime
The maximum time for an XAResource prepare invocation.
XAPrepareTotalTime
The total time for all XAResource prepare invocations.
XARecoverAverageTime
The average time for an XAResource recover invocation.
APPENDIX A. REFERENCE MATERIAL
Name
Description
XARecoverCount
The number of XAResource recover invocations.
XARecoverMaxTime
The maximum time for an XAResource recover invocation.
XARecoverTotalTime
The total time for all XAResource recover invocations.
XARollbackAverageTime
The average time for an XAResource rollback invocation.
XARollbackCount
The number of XAResource rollback invocations.
XARollbackMaxTime
The maximum time for an XAResource rollback invocation.
XARollbackTotalTime
The total time for all XAResource rollback invocations.
XAStartAverageTime
The average time for an XAResource start invocation.
XAStartCount
The number of XAResource start invocations.
XAStartMaxTime
The maximum time for an XAResource start invocation.
XAStartTotalTime
The total time for all XAResource start invocations.
Table A.24. JDBC Statistics
Name
Description
PreparedStatementCacheAccessCount
The number of times that the statement cache was accessed.
PreparedStatementCacheAddCount
The number of statements added to the statement cache.
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Name
Description
PreparedStatementCacheCurrentSize
The number of prepared and callable statements currently
cached in the statement cache.
PreparedStatementCacheDeleteCount
The number of statements discarded from the cache.
PreparedStatementCacheHitCount
The number of times that statements from the cache were
used.
PreparedStatementCacheMissCount
The number of times that a statement request could not be
satisfied with a statement from the cache.
A.18. TRANSACTION MANAGER CONFIGURATION OPTIONS
Table A.25. Transaction Manager Configuration Options
334
Option
Description
default-timeout
The default transaction timeout. This defaults to 300 seconds. You
can override this programmatically, on a per-transaction basis.
enable-statistics
Deprecated in favor of statistics-enabled .
enable-tsm-status
Whether to enable the transaction status manager (TSM) service,
which is used for out-of-process recovery. This option is not
supported, as running an out-of-process recovery manager to
contact the ActionStatusService from a different process,
instead of in memory, is not supported.
hornetq-store-enable-async-io
Deprecated in favor of journal-store-enable-async-io.
jdbc-action-store-drop-table
Whether JDBC action store should drop tables. The default is
false.
APPENDIX A. REFERENCE MATERIAL
Option
Description
jdbc-action-store-table-prefix
Optional prefix for table used to write transaction logs in configured
JDBC action store.
jdbc-communication-store-droptable
Whether JDBC communication store should drop tables. The default
is false.
jdbc-communication-store-tableprefix
Optional prefix for table used to write transaction logs in configured
JDBC communication store.
jdbc-state-store-drop-table
Whether JDBC state store should drop tables. The default is
false.
jdbc-state-store-table-prefix
Optional prefix for table used to write transaction logs in configured
JDBC state store.
jdbc-store-datasource
JNDI name of non-XA datasource used. Datasource should be
defined in datasources subsystem.
journal-store-enable-async-io
Whether AsyncIO should be enabled for the journal store or not.
Defaults to false. The server should be restarted for this setting to
take effect.
jts
Whether to use Java Transaction Service (JTS) transactions.
Defaults to false, which uses JTA transactions only.
node-identifier
The node identifier for the transaction manager. If this option is not
set, you will see a warning upon server startup. This option is
required in the following situations:
For JTS to JTS communications
When two transaction managers access shared resource
managers
When two transaction managers access shared object stores
The node-identifier must be unique for each transaction manager as
it is required to enforce data integrity during recovery. The nodeidentifier must also be unique for JTA because multiple nodes may
interact with the same resource manager or share a transaction
object store.
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Option
Description
object-store-path
A relative or absolute file system path where the transaction
manager object store stores data. By default relative to the
object-store-relative-to parameter’s value. If objectstore-relative-to is set to an empty string, this value is
treated as an absolute path.
object-store-relative-to
References a global path configuration in the domain model. The
default value is the data directory for JBoss EAP, which is the value
of the property jboss.server.data.dir, and defaults to
EAP_HOME/domain/data/ for a managed domain, or
EAP_HOME/standalone/data/ for a standalone server
instance. The value of the object store object-store-path
transaction manager attribute is relative to this path. Set this attribute
to an empty string to have object-store-path be treated as an
absolute path.
process-id-socket-binding
The name of the socket binding configuration to use if the
transaction manager should use a socket-based process ID. Will be
undefined if process-id-uuid is true; otherwise must be
set.
process-id-socket-max-ports
The transaction manager creates a unique identifier for each
transaction log. Two different mechanisms are provided for
generating unique identifiers: a socket-based mechanism and a
mechanism based on the process identifier of the process.
In the case of the socket-based identifier, a socket is opened and its
port number is used for the identifier. If the port is already in use, the
next port is probed, until a free one is found. The process-id-socketmax-ports represents the maximum number of sockets the
transaction manager will try before failing. The default value is 10.
336
process-id-uuid
Set to true to use the process identifier to create a unique identifier
for each transaction. Otherwise, the socket-based mechanism is
used. Defaults to true. See process-id-socket-maxports for more information. To enable process-id-socketbinding, set process-id-uuid to false.
recovery-listener
Whether or not the transaction recovery process should listen on a
network socket. Defaults to false.
APPENDIX A. REFERENCE MATERIAL
Option
Description
socket-binding
Specifies the name of the socket binding used by the transaction
periodic recovery listener when recovery-listener is set to
true.
statistics-enabled
Whether statistics should be enabled.
status-socket-binding
Specifies the socket binding to use for the transaction status
manager. This configuration option is not supported.
use-hornetq-store
Deprecated in favor of use-journal-store.
use-jdbc-store
Use the JDBC store for writing transaction logs. Set to true to
enable and to false to use the default log store type.
use-journal-store
Use Apache ActiveMQ Artemis journaled storage mechanisms
instead of file-based storage for the transaction logs. This is disabled
by default, but can improve I/O performance. It is not recommended
for JTS transactions on separate transaction managers. When
changing this option, the server has to be restarted using the
shutdown command for the change to take effect.
A.19. RESOURCE ADAPTER ATTRIBUTES
The following tables describe the resource adapter attributes.
Table A.26. Main Attributes
Attribute
Description
archive
The resource adapter archive.
beanvalidationgroups
The bean validation groups that should be used.
bootstrap-context
The unique name of the bootstrap context that should be used.
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Attribute
Description
config-properties
Custom defined config properties.
module
The module from which the resource adapter will be loaded.
statistics-enabled
Whether runtime statistics are enabled or not.
transaction-support
The transaction support level of the resource adapter.
wm-security
Toggle on/off wm.security for this resource adapter. In case of
false, all wm-security-* parameters are ignored, even the
defaults.
wm-security-default-groups
A default groups list that should be added to the used Subject
instance.
wm-security-default-principal
A default principal name that should be added to the used Subject
instance.
wm-security-domain
The name of the security domain that should be used.
wm-security-mapping-groups
List of groups mappings.
wm-security-mapping-required
Defines if a mapping is required for security credentials.
wm-security-mapping-users
List of user mappings.
Table A.27. admin-objects Attributes
338
Attribute
Description
class-name
The fully qualified class name of an administration object.
APPENDIX A. REFERENCE MATERIAL
Attribute
Description
enabled
Specifies if the administration object should be enabled.
jndi-name
The JNDI name for the administration object.
use-java-context
Setting this to false will bind the object into global JNDI.
Table A.28. connection-definitions Attributes
Attribute
Description
allocation-retry
Indicates the number of times that allocating a connection should be
tried before throwing an exception.
allocation-retry-wait-millis
The amount of time, in milliseconds, to wait between retrying to
allocate a connection.
background-validation
Specifies that connections should be validated on a background
thread versus being validated prior to use. Changing this value
requires a server restart.
background-validation-millis
The amount of time, in milliseconds, that background validation will
run. Changing this value requires a server restart.
blocking-timeout-wait-millis
The maximum time, in milliseconds, to block while waiting for a
connection before throwing an exception. Note that this blocks only
while waiting for locking a connection, and will never throw an
exception if creating a new connection takes an inordinately long
time.
capacity-decrementer-class
Class defining the policy for decrementing connections in the pool.
capacity-decrementer-properties
Properties to inject in class defining the policy for decrementing
connections in the pool.
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340
Attribute
Description
capacity-incrementer-class
Class defining the policy for incrementing connections in the pool.
capacity-incrementer-properties
Properties to inject in class defining the policy for incrementing
connections in the pool.
class-name
The fully qualified class name of a managed connection factory or
admin object.
connectable
Enable the use of CMR. This feature means that a local resource can
reliably participate in an XA transaction.
enabled
Specifies if the resource adapter should be enabled.
enlistment
Specifies if lazy enlistment should be used if supported by the
resource adapter.
enlistment-trace
Specifies if JBoss EAP/IronJacamar should record enlistment traces.
flush-strategy
How the pool should be flushed in case of an error. Valid values are:
FailingConnectionOnly (default), IdleConnections, and
EntirePool.
idle-timeout-minutes
The maximum time, in minutes, a connection may be idle before being
closed. The actual maximum time depends also on the
IdleRemover scan time, which is half of the smallest idletimeout-minutes value of any pool. Changing this value requires
a server restart.
initial-pool-size
The initial number of connections a pool should hold.
interleaving
Specifies whether to enable interleaving for XA connections.
jndi-name
The JNDI name for the connection factory.
APPENDIX A. REFERENCE MATERIAL
Attribute
Description
max-pool-size
The maximum number of connections for a pool. No more
connections will be created in each sub-pool.
mcp
The ManagedConnectionPool implementation. For example:
org.jboss.jca.core.connectionmanager.pool.mcp.
SemaphoreArrayListManagedConnectionPool.
min-pool-size
The minimum number of connections for a pool.
no-recovery
Specifies if the connection pool should be excluded from recovery.
no-tx-separate-pool
Oracle does not like XA connections getting used both inside and
outside a JTA transaction. To workaround the problem you can create
separate sub-pools for the different contexts.
pad-xid
Specifies whether the Xid should be padded.
pool-fair
Specifies if pool use should be fair.
pool-prefill
Specifies if the pool should be prefilled. Changing this value requires
a server restart.
pool-use-strict-min
Specifies if the min-pool-size should be considered strict.
recovery-password
The password used for recovery.
recovery-plugin-class-name
The fully qualified class name of the recovery plugin implementation.
recovery-plugin-properties
The properties for the recovery plugin.
recovery-security-domain
The security domain used for recovery.
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Attribute
Description
recovery-username
The user name used for recovery.
same-rm-override
Unconditionally set whether
javax.transaction.xa.XAResource.isSameRM(XARes
ource) returns true or false.
security-application
Indicates that application-supplied parameters, such as from
getConnection(user, pw) , are used to distinguish
connections in the pool.
security-domain
The security domain which defines the
javax.security.auth.Subject that is used to distinguish
connections in the pool.
342
security-domain-and-application
Indicates that either application-supplied parameters, such as from
getConnection(user, pw) , or Subject (from security
domain), are used to distinguish connections in the pool.
sharable
Enable the use of sharable connections, which allows lazy
association to be enabled if supported.
tracking
Specifies if IronJacamar should track connection handles across
transaction boundaries.
use-ccm
Enable the use of a cached connection manager.
use-fast-fail
Whether to fail a connection allocation on the first try if it is invalid
(true), or keep trying until the pool is exhausted of all potential
connections (false).
use-java-context
Setting this to false will bind the object into global JNDI.
validate-on-match
Specifies if connection validation should be done when a connection
factory attempts to match a managed connection. This is typically
exclusive to the use of background validation.
APPENDIX A. REFERENCE MATERIAL
Attribute
Description
wrap-xa-resource
Specifies whether XAResource instances should be wrapped in an
org.jboss.tm.XAResourceWrapper instance.
xa-resource-timeout
The value is passed to
XAResource.setTransactionTimeout(), in seconds. The
default is 0 .
The resource adapter schema can be found at EAP_HOME/docs/schema/wildfly-resourceadapters_4_0.xsd.
A.20. RESOURCE ADAPTER STATISTICS
Table A.29. Resource Adapter Statistics
Name
Description
ActiveCount
The number of active connections. Each of the connections is either in use by
an application or available in the pool
AvailableCount
The number of available connections in the pool.
AverageBlockingTime
The average time spent blocking on obtaining an exclusive lock on the pool.
The value is in milliseconds.
AverageCreationTime
The average time spent creating a connection. The value is in milliseconds.
CreatedCount
The number of connections created.
DestroyedCount
The number of connections destroyed.
InUseCount
The number of connections currently in use.
MaxCreationTime
The maximum time it took to create a connection. The value is in milliseconds.
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Name
Description
MaxUsedCount
The maximum number of connections used.
MaxWaitCount
The maximum number of requests waiting for a connection at the same time.
MaxWaitTime
The maximum time spent waiting for an exclusive lock on the pool.
TimedOut
The number of timed out connections.
TotalBlockingTime
The total time spent waiting for an exclusive lock on the pool. The value is in
milliseconds.
TotalCreationTime
The total time spent creating connections. The value is in milliseconds.
WaitCount
The number of requests that had to wait for a connection.
A.21. UNDERTOW SUBSYSTEM ATTRIBUTES
Table A.30. undertow Attributes
344
Attribute
Default
Description
default-security-domain
other
The default security domain used by web
deployments
default-server
default-server
The default server to use for deployments
default-servlet-container
default
The default servlet container to use for
deployments
default-virtual-host
default-host
The default virtual host to use for deployments
APPENDIX A. REFERENCE MATERIAL
Attribute
Default
Description
instance-id
${jboss.node.n
ame}
The cluster instance id
statistics-enabled
false
Configures if are statistics enabled
Buffer Cache Attributes
Table A.31. buffer-cache Attributes
Attribute
Default
Description
buffer-size
1024
The size of the buffers. Smaller buffers allow space
to be utilized more effectively.
buffers-per-region
1024
The numbers of buffers per region.
max-regions
10
The maximum number of regions. This controls the
maximum amount of memory that can be used for
caching.
Servlet Container Attributes
The servlet container component has the following structure:
servlet-container
mime-mapping
welcome-file
jsp (part of settings)
persistent-sessions (part of settings)
session-cookie (part of settings)
websockets (part of settings)
servlet-container Attributes
Table A.32. servlet-container Attributes
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Attribute
Default
Description
allow-non-standard-wrappers
false
If true then request and response wrappers that do
not extend the standard wrapper classes can be
used
default-buffer-cache
default
The buffer cache to use for caching static
resources
default-encoding
default-session-timeout
Default encoding to use for all deployed
applications
30
directory-listing
If directory listing should be enabled for default
servlets.
disable-caching-for-securedpages
true
If Undertow should set headers to disable caching
for secured paged. Disabling this can cause
security problems, as sensitive pages may be
cached by an intermediary.
eager-filter-initialization
false
If true undertow calls filter init() on deployment start
rather than when first requested.
ignore-flush
false
Ignore flushes on the servlet output stream. In most
cases these just hurt performance for no good
reason.
max-sessions
346
The default session timeout (in minutes) for all
applications deployed in the container.
The maximum number of sessions that can be
active at one time
proactive-authentication
false
If proactive authentication should be used. If this is
true a user will always be authenticated if
credentials are present.
session-id-length
30
The length of the generated session ID. Longer
session ID’s are more secure.
APPENDIX A. REFERENCE MATERIAL
Attribute
Default
Description
stack-trace-on-error
local-only
If an error page with the stack trace should be
generated on error. Values are all, none and localonly
use-listener-encoding
false
Use encoding defined on listener
mime-mapping Attributes
Table A.33. mime-mapping Attributes
Attribute
Default
value
Description
The mime type for this mapping
welcome-file Attributes
Defines a welcome file and has no options.
jsp Attributes
Note
When using the management CLI to update the jsp element, it is available under settings
in the servlet-container element e.g.: /subsystem=undertow/servletcontainer=default/setting=jsp. It also must be added first via the add command:
/subsystem=undertow/servlet-container=default/setting=jsp:add
Table A.34. jsp Attributes
Attribute
Default
Description
check-interval
0
Check interval for JSP updates using a background
thread.
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Attribute
Default
Description
development
false
Enable Development mode which enables
reloading JSP on-the-fly
disabled
false
Enable the JSP container.
display-source-fragment
true
When a runtime error occurs, attempts to display
corresponding JSP source fragment
dump-smap
false
Write SMAP data to a file.
error-on-use-bean-invalid-classattribute
false
Enable errors when using a bad class in useBean.
generate-strings-as-char-arrays
false
Generate String constants as char arrays.
java-encoding
UTF8
Specify the encoding used for Java sources.
keep-generated
true
Keep the generated Servlets.
mapped-file
true
Map to the JSP source.
modification-test-interval
4
Minimum amount of time between two tests for
updates, in seconds.
optimize-scriptlets
false
If JSP scriptlets should be optimized to remove
string concatenation
recompile-on-fail
false
Retry failed JSP compilations on each request.
scratch-dir
smap
348
Specify a different work directory.
true
Enable SMAP.
APPENDIX A. REFERENCE MATERIAL
Attribute
Default
Description
source-vm
1.8
Source VM level for compilation.
tag-pooling
true
Enable tag pooling.
target-vm
1.8
Target VM level for compilation.
trim-spaces
false
Trim some spaces from the generated Servlet.
x-powered-by
true
Enable advertising the JSP engine in x-poweredby.
persistent-sessions Attributes
Note
When using the management CLI to update the persistent-sessions element, it is available
under settings in the servlet-container element e.g.: /subsystem=undertow/servletcontainer=default/setting=persistent-sessions. It also must be added first
via the add command: /subsystem=undertow/servletcontainer=default/setting=persistent-sessions:add
Table A.35. persistent-sessions Attributes
Attribute
Default
Description
path
The path to the persistent session data directory. If
this is null sessions will be stored in memory
relative-to
The directory the path is relative to
session-cookie Attributes
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Note
When using the management CLI to update the session-cookie element, it is available
under settings in the servlet-container element e.g.: /subsystem=undertow/servletcontainer=default/setting=session-cookie. It also must be added first via the
add command: /subsystem=undertow/servletcontainer=default/setting=session-cookie:add
Table A.36. session-cookie Attributes
Attribute
Default
Description
comment
Cookie comment
domain
Cookie domain
http-only
Is cookie http-only
max-age
Max age of cookie
name
Name of the cookie
secure
Is cookie secure?
websockets Attributes
Note
When using the management CLI to update the websockets element, it is available under
settings in the servlet-container element e.g.: /subsystem=undertow/servletcontainer=default/setting=websockets. It also must be added first via the add
command: /subsystem=undertow/servletcontainer=default/setting=websockets:add
Table A.37. websockets Attributes
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Attribute
Default
Description
buffer-pool
default
The buffer pool to use for websocket deployments
dispatch-to-worker
true
If callbacks should be dispatched to a worker
thread. If this is false then they will be run in the IO
thread, which is faster however care must be taken
not to perform blocking operations.
worker
default
The worker to use for websocket deployments
Filter Attributes
custom-filter Filters
Table A.38. custom-filter Attributes
Attribute
Default
Description
class-name
Class name of HttpHandler
module
Module name where class can be loaded from
parameters
Filter parameters
error-page Filters
The error pages
Table A.39. error-page Attributes
Attribute
Default
Description
code
Error page code
path
Error page path
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expression-filter Filters
A filter parsed from the undertow expression language
Table A.40. expression-filter Attributes
Attribute
Default
Description
expression
The expression that defines the filter
module
Module to use to load the filter definitions
gzip Filters
Defines the gzip filter and has no attributes.
mod-cluster Filters
The mod-cluster filter component has the following structure:
mod-cluster
balancer
load-balancing-group
node
context
Table A.41. mod-cluster Attributes
Attribute
Default
Description
advertise-frequency
10000
The frequency (in milliseconds) that mod-cluster
advertises itself on the network
advertise-path
/
The path that mod-cluster is registered under,
defaults to /
advertise-protocol
http
The protocol that is in use, defaults to HTTP
advertise-socket-binding
352
The multicast group that is used to advertise
APPENDIX A. REFERENCE MATERIAL
Attribute
Default
Description
broken-node-timeout
60000
The amount of time that must elapse before a
broken node is removed from the table
cached-connections-per-thread
5
The number of connections that will be kept alive
indefinitely
connection-idle-timeout
60
The amount of time a connection can be idle before
it will be closed. Connections will not time out once
the pool size is down to the configured minimum
(as configured by cached-connections-per-thread)
connections-per-thread
10
The number of connections that will be maintained
to backend servers, per IO thread. Defaults to 10.
enable-http2
false
If the load balancer should attempt to upgrade
back end connections to HTTP2. If HTTP2 is not
supported, HTTP or HTTPS will be used as normal
health-check-interval
10000
The frequency of health check pings to backend
nodes
management-access-predicate
A predicate that is applied to incoming requests to
determine if they can perform mod cluster
management commands. Provides additional
security on top of what is provided by limiting
management to requests that originate from the
management-socket-binding
management-socket-binding
The socket binding of the mod_cluster
management port. When using mod_cluster two
HTTP listeners should be defined, a public one to
handle requests, and one bound to the internal
network to handle mod cluster commands. This
socket binding should correspond to the internal
listener, and should not be publicly accessible
max-request-time
-1
The max amount of time that a request to a
backend node can take before it is killed
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Attribute
Default
Description
request-queue-size
10
The number of requests that can be queued if the
connection pool is full before requests are rejected
with a 503
security-key
The security key that is used for the mod-cluster
group. All members must use the same security
key.
security-realm
The security realm that provides the SSL
configuration
use-alias
false
If an alias check is performed
worker
default
The XNIO worker that is used to send the advertise
notifications
Default
Description
Table A.42. balancer Attributes
Attribute
354
max-attempts
The number of attempts to send the request to a
backend server
sticky-session
If sticky sessions are enabled
sticky-session-cookie
The session cookie name
sticky-session-force
If this is true then an error will be returned if the
request cannot be routed to the sticky node,
otherwise it will be routed to another node
sticky-session-path
The path of the sticky session cookie
APPENDIX A. REFERENCE MATERIAL
Attribute
Default
Description
sticky-session-remove
Remove the session cookie if the request cannot
be routed to the correct host
wait-worker
The number of seconds to wait for an available
worker
load-balancing-group Attributes
Defines a load balancing group and has no options.
Table A.43. node Attributes
Attribute
Default
Description
aliases
The nodes aliases
cache-connections
The number of connections to keep alive
indefinitely
elected
The elected count
flush-packets
If received data should be immediately flushed
load
The current load of this node
load-balancing-group
The load balancing group this node belongs to
max-connections
The maximum number of connections per IO
thread
open-connections
The current number of open connections
ping
The nodes ping
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Attribute
Default
Description
queue-new-requests
If a request is received and there is no worker
immediately available should it be queued
read
The number of bytes read from the node
request-queue-size
The size of the request queue
status
The current status of this node
timeout
The request timeout
ttl
The time connections will stay alive with no
requests before being closed, if the number of
connections is larger than cache-connections
uri
The URI that the load balancer uses to connect to
the node
written
The number of bytes transferred to the node
Table A.44. context Attributes
Attribute
Default
requests
The number of requests against this context
status
The status of this context
request-limit Filters
Table A.45. request-limit Attributes
356
Description
APPENDIX A. REFERENCE MATERIAL
Attribute
Default
Description
max-concurrent-requests
Maximum number of concurrent requests
queue-size
Number of requests to queue before they start
being rejected
response-header Filters
Response header filter allows you to add custom headers.
Table A.46. response-header Attributes
Attribute
Default
Description
header-name
Header name
header-value
Value for header
rewrite Filters
Table A.47. rewrite Attributes
Attribute
Default
Description
redirect
false
If this is true then a redirect will be done instead of
a rewrite
target
The expression that defines the target. If you are
redirecting to a constant target put single quotes
around the value
Handler Attributes
file Attributes
Table A.48. file Attributes
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Attribute
Default
Description
cache-buffer-size
1024
Size of the buffers
cache-buffers
1024
Number of buffers
case-sensitive
true
Use case sensitive file handling
directory-listing
false
Enable directory listing?
follow-symlink
false
Enable following symbolic links
path
Path on the file system from where file handler will
serve resources
safe-symlink-paths
Paths that are safe to be targets of symbolic links
Using WebDAV for Static Resources
Previous versions of JBoss EAP allowed for using WebDAV with the Web subsystem (via the
WebdavServlet) to host static resources and enable additional HTTP methods for accessing and
manipulating those files. In JBoss EAP 7, the Undertow subsystem does provide a mechanism for
serving static files via a file handler, but the Undertow subsystem does not support WebDAV. If you
would like to use WebDAV with JBoss EAP 7, you may write a custom WebDAV servlet.
reverse-proxy attributes
The reverse-proxy handler component has the following structure:
reverse-proxy
host
Table A.49. reverse-proxy Attributes
358
Attribute
Default
Description
cached-connections-per-thread
5
The number of connections that will be kept alive
indefinitely
APPENDIX A. REFERENCE MATERIAL
Attribute
Default
Description
connection-idle-timeout
60
The amount of time a connection can be idle before
it will be closed. Connections will not time out once
the pool size is down to the configured minimum
(as configured by cached-connections-per-thread)
connections-per-thread
10
The number of connections that will be maintained
to backend servers, per IO thread.
max-request-time
-1
The maximum time that a proxy request can be
active for, before being killed. Defaults to unlimited
problem-server-retry
30
Time in seconds to wait before attempting to
reconnect to a server that is down
request-queue-size
10
The number of requests that can be queued if the
connection pool is full before requests are rejected
with a 503
session-cookie-names
JSESSIONID
Comma separated list of session cookie names.
Generally this will just be JSESSIONID.
Default
Description
Table A.50. host Attributes
Attribute
instance-id
The instance id (aka JVM route) that will be used to
enable sticky sessions
outbound-socket-binding
Outbound socket binding for this host
path
/
Optional path if host is using non root resource
scheme
http
What kind of scheme is used
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Attribute
Default
security-realm
Description
The security realm that provides the SSL
configuration for the connection to the host
Server Attributes
The server component has the following structure:
server
http-listener
https-listener
ajp-listener
host
access-log (part of settings)
single-sign-on (part of settings)
filter-ref
location
filter-ref
server Attributes
Table A.51. server Attributes
Attribute
Default
Description
default-host
default-host
The servers default virtual host
servlet-container
default
The servers default servlet container
http-listener Attributes
Table A.52. http-listener Attributes
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Attribute
Default
Description
allow-encoded-slash
false
If a request comes in with encoded / characters
(i.e. %2F), will these be decoded.
allow-equals-in-cookie-value
false
If this is true then Undertow will allow non-escaped
equals characters in unquoted cookie values.
Unquoted cookie values may not contain equals
characters. If present the value ends before the
equals sign. The remainder of the cookie value will
be dropped.
always-set-keep-alive
true
If this is true then a Connection: keep-alive header
will be added to responses, even when it is not
strictly required by the specification.
buffer-pipelined-data
true
If we should buffer pipelined requests.
buffer-pool
default
The AJP listeners buffer pool
certificate-forwarding
false
If certificate forwarding should be enabled. If this is
enabled then the listener will take the certificate
from the SSL_CLIENT_CERT attribute. This
should only be enabled if behind a proxy, and the
proxy is configured to always set these headers.
decode-url
true
If this is true then the parser will decode the URL
and query parameters using the selected character
encoding (UTF-8 by default). If this is false they will
not be decoded. This will allow a later handler to
decode them into whatever charset is desired.
disallowed-methods
["TRACE"]
A comma separated list of HTTP methods that are
not allowed
enable-http2
false
Enables HTTP2 support for this listener
enabled
true
If the listener is enabled
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Attribute
Default
Description
http2-enable-push
true
If server push is enabled for this connection
http2-header-table-size
The size of the header table used for HPACK
compression, in bytes. This amount of memory will
be allocated per connection for compression.
Larger values use more memory but may give
better compression.
http2-initial-window-size
The flow control window size that controls how
quickly the client can send data to the server
http2-max-concurrent-streams
The maximum number of HTTP/2 streams that can
be active at any time on a single connection
http2-max-frame-size
The max HTTP/2 frame size
http2-max-header-list-size
The maximum size of request headers the server
is prepared to accept
max-buffered-request-size
16384
max-connections
362
Maximum size of a buffered request, in
bytesRequests are not usually buffered, the most
common case is when performing SSL
renegotiation for a POST request, and the post
data must be fully buffered in order to perform the
renegotiation.
The maximum number of concurrent connections.
max-cookies
200
The maximum number of cookies that will be
parsed. This is used to protect against hash
vulnerabilities.
max-header-size
1048576
The maximum size in bytes of a http request
header.
APPENDIX A. REFERENCE MATERIAL
Attribute
Default
Description
max-headers
200
The maximum number of headers that will be
parsed. This is used to protect against hash
vulnerabilities.
max-parameters
1000
The maximum number of parameters that will be
parsed. This is used to protect against hash
vulnerabilities. This applies to both query
parameters, and to POST data, but is not
cumulative (i.e. you can potentially have max
parameters * 2 total parameters).
max-post-size
10485760
The maximum size of a post that will be accepted
no-request-timeout
proxy-address-forwarding
The length of time in milliseconds that the
connection can be idle before it is closed by the
container
false
enables x-forwarded-host and similar headers and
set a remote ip address and host name
read-timeout
Configure a read timeout for a socket, in
milliseconds. If the given amount of time elapses
without a successful read taking place, the socket’s
next read will throw a {@link
ReadTimeoutException}.
receive-buffer
The receive buffer size.
record-request-start-time
redirect-socket
false
If this is true then Undertow will record the request
start time, to allow for request time to be logged.
This has a small but measurable performance
impact
If this listener is supporting non-SSL requests, and
a request is received for which a matching requires
SSL transport, undertow will automatically redirect
the request to the socket binding port specified
here.
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Attribute
Default
request-parse-timeout
resolve-peer-address
Description
The maximum amount of time (in milliseconds) that
can be spent parsing the request
false
Enables host dns lookup
send-buffer
The send buffer size.
socket-binding
The AJP listener socket binder
tcp-backlog
Configure a server with the specified backlog.
tcp-keep-alive
Configure a channel to send TCP keep-alive
messages in an implementation-dependent
manner.
url-charset
UTF-8
URL charset
worker
default
The listener’s XNIO worker
write-timeout
Configure a write timeout for a socket, in
milliseconds. If the given amount of time elapses
without a successful write taking place, the socket’s
next write will throw a {@link
WriteTimeoutException}.
The following attributes are read-only and only available when statistics are enabled for Undertow:
Table A.53. http-listener Metric Attributes
Attribute
bytes-received
364
Default
Description
The number of bytes that have been received by
this listener
APPENDIX A. REFERENCE MATERIAL
Attribute
Default
Description
bytes-sent
The number of bytes that have been sent out on
this listener
error-count
The number of 500 responses that have been sent
by this listener
max-processing-time
The maximum processing time taken by a request
on this listener
processing-time
The total processing time of all requests handed by
this listener
request-count
The number of requests this listener has served
https-listener Attributes
Table A.54. https-listener Attributes
Attribute
Default
Description
allow-encoded-slash
false
If a request comes in with encoded / characters
(i.e. %2F), will these be decoded.
allow-equals-in-cookie-value
false
If this is true then Undertow will allow non-escaped
equals characters in unquoted cookie values.
Unquoted cookie values may not contain equals
characters. If present the value ends before the
equals sign. The remainder of the cookie value will
be dropped.
always-set-keep-alive
true
If this is true then a Connection: keep-alive header
will be added to responses, even when it is not
strictly required by the specification.
buffer-pipelined-data
true
If we should buffer pipelined requests.
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Attribute
Default
Description
buffer-pool
default
The AJP listeners buffer pool
decode-url
true
If this is true then the parser will decode the URL
and query parameters using the selected character
encoding (UTF-8 by default). If this is false they will
not be decoded. This will allow a later handler to
decode them into whatever charset is desired.
disallowed-methods
["TRACE"]
A comma separated list of HTTP methods that are
not allowed
enable-http2
false
Enables HTTP2 support for this listener
enable-spdy
false
Enables SPDY support for this listener
enabled
true
If the listener is enabled
enabled-cipher-suites
Configures Enabled SSL cyphers
enabled-protocols
Configures SSL protocols
http2-enable-push
366
true
If server push is enabled for this connection
http2-header-table-size
The size of the header table used for HPACK
compression, in bytes. This amount of memory will
be allocated per connection for compression.
Larger values use more memory but may give
better compression.
http2-initial-window-size
The flow control window size that controls how
quickly the client can send data to the server
http2-max-concurrent-streams
The maximum number of HTTP/2 streams that can
be active at any time on a single connection
APPENDIX A. REFERENCE MATERIAL
Attribute
Default
Description
http2-max-frame-size
The max HTTP/2 frame size
http2-max-header-list-size
The maximum size of request headers the server
is prepared to accept
max-buffered-request-size
16384
max-connections
Maximum size of a buffered request, in
bytesRequests are not usually buffered, the most
common case is when performing SSL
renegotiation for a POST request, and the post
data must be fully buffered in order to perform the
renegotiation.
The maximum number of concurrent connections.
max-cookies
100
The maximum number of cookies that will be
parsed. This is used to protect against hash
vulnerabilities.
max-header-size
1048576
The maximum size in bytes of a http request
header.
max-headers
200
The maximum number of headers that will be
parsed. This is used to protect against hash
vulnerabilities.
max-parameters
1000
The maximum number of parameters that will be
parsed. This is used to protect against hash
vulnerabilities. This applies to both query
parameters, and to POST data, but is not
cumulative (i.e. you can potentially have max
parameters * 2 total parameters).
max-post-size
10485760
The maximum size of a post that will be accepted
no-request-timeout
The length of time in milliseconds that the
connection can be idle before it is closed by the
container
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Attribute
Default
read-timeout
Configure a read timeout for a socket, in
milliseconds. If the given amount of time elapses
without a successful read taking place, the socket’s
next read will throw a {@link
ReadTimeoutException}.
receive-buffer
The receive buffer size.
record-request-start-time
false
request-parse-timeout
resolve-peer-address
368
Description
If this is true then Undertow will record the request
start time, to allow for request time to be logged.
This has a small but measurable performance
impact
The maximum amount of time (in milliseconds) that
can be spent parsing the request
false
Enables host dns lookup
security-realm
The listeners security realm
send-buffer
The send buffer size.
socket-binding
The AJP listener socket binder
ssl-session-cache-size
The maximum number of active SSL sessions
ssl-session-timeout
The timeout for SSL sessions, in seconds
tcp-backlog
Configure a server with the specified backlog.
tcp-keep-alive
Configure a channel to send TCP keep-alive
messages in an implementation-dependent
manner.
APPENDIX A. REFERENCE MATERIAL
Attribute
Default
Description
url-charset
UTF-8
URL charset
verify-client
NOT_REQUE
STED
The desired SSL client authentication mode for
SSL channels
worker
default
The listener’s XNIO worker
write-timeout
Configure a write timeout for a socket, in
milliseconds. If the given amount of time elapses
without a successful write taking place, the socket’s
next write will throw a {@link
WriteTimeoutException}.
The following attributes are read-only and only available when statistics are enabled for Undertow:
Table A.55. https-listener Metric Attributes
Attribute
Default
Description
bytes-received
The number of bytes that have been received by
this listener
bytes-sent
The number of bytes that have been sent out on
this listener
error-count
The number of 500 responses that have been sent
by this listener
max-processing-time
The maximum processing time taken by a request
on this listener
processing-time
The total processing time of all requests handed by
this listener
request-count
The number of requests this listener has served
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ajp-listener Attributes
Table A.56. ajp-listener Attributes
Attribute
Default
Description
allow-encoded-slash
false
If a request comes in with encoded / characters
(i.e. %2F), will these be decoded.
allow-equals-in-cookie-value
false
If this is true then Undertow will allow non-escaped
equals characters in unquoted cookie values.
Unquoted cookie values may not contain equals
characters. If present the value ends before the
equals sign. The remainder of the cookie value will
be dropped.
always-set-keep-alive
true
If this is true then a Connection: keep-alive header
will be added to responses, even when it is not
strictly required by the specification.
buffer-pipelined-data
true
If we should buffer pipelined requests.
buffer-pool
default
The AJP listeners buffer pool
decode-url
true
If this is true then the parser will decode the URL
and query parameters using the selected character
encoding (UTF-8 by default). If this is false they will
not be decoded. This will allow a later handler to
decode them into whatever charset is desired.
disallowed-methods
["TRACE"]
A comma separated list of HTTP methods that are
not allowed
enabled
true
If the listener is enabled
max-ajp-packet-size
370
The maximum supported size of AJP packets. If
this is modified it has be increased on the load
balancer and the backend server.
APPENDIX A. REFERENCE MATERIAL
Attribute
Default
Description
max-buffered-request-size
16384
Maximum size of a buffered request, in
bytesRequests are not usually buffered, the most
common case is when performing SSL
renegotiation for a POST request, and the post
data must be fully buffered in order to perform the
renegotiation.
max-connections
The maximum number of concurrent connections.
max-cookies
200
The maximum number of cookies that will be
parsed. This is used to protect against hash
vulnerabilities.
max-header-size
1048576
The maximum size in bytes of a http request
header.
max-headers
200
The maximum number of headers that will be
parsed. This is used to protect against hash
vulnerabilities.
max-parameters
100
The maximum number of parameters that will be
parsed. This is used to protect against hash
vulnerabilities. This applies to both query
parameters, and to POST data, but is not
cumulative (i.e. you can potentially have max
parameters * 2 total parameters).
max-post-size
10485760
The maximum size of a post that will be accepted
no-request-timeout
The length of time in milliseconds that the
connection can be idle before it is closed by the
container
read-timeout
Configure a read timeout for a socket, in
milliseconds. If the given amount of time elapses
without a successful read taking place, the socket’s
next read will throw a {@link
ReadTimeoutException}.
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Attribute
Default
receive-buffer
record-request-start-time
The receive buffer size.
false
If this is true then Undertow will record the request
start time, to allow for request time to be logged.
This has a small but measurable performance
impact
redirect-socket
If this listener is supporting non-SSL requests, and
a request is received for which a matching requires
SSL transport, undertow will automatically redirect
the request to the socket binding port specified
here.
request-parse-timeout
The maximum amount of time (in milliseconds) that
can be spent parsing the request
resolve-peer-address
false
Enables host dns lookup
scheme
The listener scheme, can be HTTP or HTTPS. By
default the scheme will be taken from the incoming
AJP request.
send-buffer
The send buffer size.
socket-binding
The AJP listener socket binder
tcp-backlog
Configure a server with the specified backlog.
tcp-keep-alive
Configure a channel to send TCP keep-alive
messages in an implementation-dependent
manner.
url-charset
372
Description
UTF-8
URL charset
APPENDIX A. REFERENCE MATERIAL
Attribute
Default
Description
worker
default
The listener’s XNIO worker
write-timeout
Configure a write timeout for a socket, in
milliseconds. If the given amount of time elapses
without a successful write taking place, the socket’s
next write will throw a {@link
WriteTimeoutException}.
The following attributes are read-only and only available when statistics are enabled for Undertow:
Table A.57. ajp-listener Metric Attributes
Attribute
Default
Description
bytes-received
The number of bytes that have been received by
this listener
bytes-sent
The number of bytes that have been sent out on
this listener
error-count
The number of 500 responses that have been sent
by this listener
max-processing-time
The maximum processing time taken by a request
on this listener
processing-time
The total processing time of all requests handed by
this listener
request-count
The number of requests this listener has served
host Attributes
Table A.58. host Attributes
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Attribute
Default
alias
Description
Aliases for the host
default-response-code
404
If set, this will be response code sent back in case
requested context does not exist on server.
default-web-module
ROOT.war
Default web module
disable-console-redirect
false
if set to true, /console redirect wont be enabled for
this host, default is false
Default
Description
filter-ref Attributes
Table A.59. filter-ref Attributes
Attribute
predicate
priority
Predicates provide a simple way of making a
true/false decision based on an exchange. Many
handlers have a requirement that they be applied
conditionally, and predicates provide a general way
to specify a condition.
1
Defines filter order, it should be set to 1 or more,
higher number instructs server to be included
earlier in handler chain than others under same
context.
access-log Attributes
Note
When using the management CLI to update the access-log element, it is available under
settings in the host element e.g.: /subsystem=undertow/server=defaultserver/host=default-host/setting=access-log. It also must be added first via
the add command: /subsystem=undertow/server=defaultserver/host=default-host/setting=access-log:add
Table A.60. access-log Attributes
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Attribute
Default
Description
directory
${jboss.server.
log.dir}
Directory in which to save logs
extended
false
If the log uses the extended log file format
pattern
common
The access log pattern.
predicate
prefix
Predicate that determines if the request should be
logged
access_log
relative-to
Prefix for the log file name.
The directory the path is relative to
rotate
true
Rotate the access log every day.
suffix
.log
Suffix for the log file name.
use-server-log
false
If the log should be written to the server log, rather
than a separate file. Defaults to false.
worker
default
Name of the worker to use for logging
single-sign-on Attributes
Note
When using the management CLI to update the single-sign-on element, it is available
under settings in the host element e.g.: /subsystem=undertow/server=defaultserver/host=default-host/setting=single-sign-on. It also must be added
first via the add command: /subsystem=undertow/server=defaultserver/host=default-host/setting=single-sign-on:add
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Important
While distributed single sign-on is no different from an application perspective from
previous versions of JBoss EAP, in JBoss EAP 7 the caching and distribution of
authentication information is handled differently. For JBoss EAP 7, when running the HA
profile, by default each host will have its own infinispan cache which will store the relevant
session and SSO cookie information. This cache is based on the default cache of the web
cache container. JBoss EAP will also handle propagating information between all hosts'
individual caches.
Table A.61. single-sign-on Attributes
Attribute
Default
Description
cookie-name
JSESSIONIDS
SO
Name of the cookie
domain
The cookie domain that will be used.
http-only
false
Set Cookie httpOnly attribute.
path
/
Cookie path.
secure
false
Set Cookie secure attribute.
Default
Description
location Attributes
Table A.62. location Attributes
Attribute
handler
Default handler for this location
A.22. DEFAULT BEHAVIOR OF HTTP METHODS
Compared to the web subsystem in previous JBoss EAP releases, the undertow subsystem in
JBoss EAP 7.0 has different default behaviors of HTTP methods. The following table outlines the
default behaviors in JBoss EAP 7.0.
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APPENDIX A. REFERENCE MATERIAL
HTTP Method
JSP
Servlet
Static HTML
GET
OK
Depends on its
implementation
OK
POST
OK
Depends on its
implementation
NOT_ALLOWED
HEAD
OK
Depends on its
implementation
OK
PUT
NOT_ALLOWED
Depends on its
implementation
NOT_ALLOWED
TRACE
NOT_ALLOWED
NOT_ALLOWED
NOT_ALLOWED
DELETE
NOT_ALLOWED
Depends on its
implementation
NOT_ALLOWED
OPTIONS
NOT_ALLOWED
Depends on its
implementation
OK
A.23. IO SUBSYSTEM ATTRIBUTES
Table A.63. worker Attributes
Attribute
Default
io-threads
Description
Number of IO threads to use
stack-size
0
Size of the stack
task-keepalive
60
Keepalive time for a task
task-max-threads
Maximum number of threads for a task
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Table A.64. buffer-pool Attributes
Attribute
Default
Description
buffer-size
Size of the buffer
buffers-per-slice
How many buffers per slice
direct-buffers
Does the buffer pool use direct buffers
A.24. REMOTING SUBSYSTEM ATTRIBUTES
Table A.65. remoting Attributes
378
Attribute
Default
Description
worker-read-threads
1
The number of read threads to create for the
remoting worker.
worker-task-core-threads
4
The number of core threads for the remoting
worker task thread pool.
worker-task-keepalive
60
The number of milliseconds to keep non-core
remoting worker task threads alive.
worker-task-limit
16384
The maximum number of remoting worker tasks to
allow before rejecting.
worker-task-max-threads
16
The maximum number of threads for the remoting
worker task thread pool.
worker-write-threads
1
The number of write threads to create for the
remoting worker.
APPENDIX A. REFERENCE MATERIAL
Important
The above attributes of the remoting element are deprecated. These attributes should now
be configured using the IO subsystem.
Table A.66. endpoint Attributes
Attribute
Default
auth-realm
authentication-retries
Description
The authentication realm to use if no authentication
CallbackHandler is specified.
3
Specify the number of times a client is allowed to
retry authentication before closing the connection.
authorize-id
The SASL authorization ID. Used as authentication
user name to use if no authentication
CallbackHandler is specified and the selected
SASL mechanism demands a user name.
buffer-region-size
The size of allocated buffer regions.
heartbeat-interval
2147483647
The interval to use for connection heartbeat, in
milliseconds. If the connection is idle in the
outbound direction for this amount of time, a ping
message will be sent, which will trigger a
corresponding reply message.
max-inbound-channels
40
The maximum number of concurrent inbound
messages on a channel.
max-inbound-message-size
92233720368
54775807
The maximum inbound message size to be
allowed. Messages exceeding this size will cause
an exception to be thrown on the reading side as
well as the writing side.
max-inbound-messages
80
The maximum number of inbound channels to
support for a connection.
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Attribute
Default
Description
max-outbound-channels
40
The maximum number of concurrent outbound
messages on a channel.
max-outbound-message-size
92233720368
54775807
The maximum outbound message size to send. No
messages larger than this well be transmitted;
attempting to do so will cause an exception on the
writing side.
max-outbound-messages
65535
The maximum number of outbound channels to
support for a connection.
receive-buffer-size
8192
The size of the largest buffer that this endpoint will
accept over a connection.
receive-window-size
131072
The maximum window size of the receive direction
for connection channels, in bytes.
sasl-protocol
remoting
Where a SaslServer or SaslClient are created by
default the protocol specified is remoting, this can
be used to override this.
send-buffer-size
8192
The size of the largest buffer that this endpoint will
transmit over a connection.
server-name
380
The server side of the connection passes it’s name
to the client in the initial greeting, by default the
name is automatically discovered from the local
address of the connection or it can be overridden
using this.
transmit-window-size
131072
The maximum window size of the transmit direction
for connection channels, in bytes.
worker
default
Worker to use
APPENDIX A. REFERENCE MATERIAL
Note
When using the management CLI to update the endpoint element, it is available under
configuration in the remoting element e.g.:
/subsystem=remoting/configuration=endpoint/.
Connector Attributes
The connector component has the following structure:
connector
property
security
sasl
property
sasl-policy
policy
Table A.67. connector Attributes
Attribute
Default
authentication-provider
sasl-protocol
Description
The authentication-provider element contains the
name of the authentication provider to use for
incoming connections.
remote
The protocol to pass into the SASL mechanisms
used for authentication.
security-realm
The associated security realm to use for
authentication for this connector.
server-name
The server name to send in the initial message
exchange and for SASL based authentication.
socket-binding
The name (or names) of the socket binding(s) to
attach to.
Table A.68. property Attributes
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Attribute
Default
value
Description
The property value.
Security Attributes
The security component allows you to configure the security for the connector, but contains no direct
configuration attributes. It can be configured using its nested components, such as sasl.
Table A.69. sasl Attributes
Attribute
Default
Description
include-mechanisms
The optional nested include-mechanisms element
contains a whitelist of allowed SASL mechanism
names. No mechanisms will be allowed which are
not present in this list.
qop
The optional nested qop element contains a list of
quality-of-protection values, in decreasing order of
preference.
reuse-session
false
The optional nested reuse-session boolean
element specifies whether or not the server should
attempt to reuse previously authenticated session
information. The mechanism may or may not
support such reuse, and other factors may also
prevent it.
server-auth
false
The optional nested server-auth boolean element
specifies whether the server should authenticate to
the client. Not all mechanisms may support this
setting.
strength
The optional nested "strength" element contains a
list of cipher strength values, in decreasing order of
preference.
sasl-policy Attributes
The sasl-policy component allows you to specify an optional policy to use to narrow down the
available set of mechanisms, but contains no direct configuration attributes. It can be configured
using its nested components, such as policy.
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APPENDIX A. REFERENCE MATERIAL
Table A.70. policy Attributes
Attribute
Default
Description
forward-secrecy
true
The optional nested forward-secrecy element
contains a boolean value which specifies whether
mechanisms that implement forward secrecy
between sessions are required. Forward secrecy
means that breaking into one session will not
automatically provide information for breaking into
future sessions.
no-active
true
The optional nested no-active element contains a
boolean value which specifies whether
mechanisms susceptible to active (non-dictionary)
attacks are not permitted. false to permit, true to
deny.
no-anonymous
true
The optional nested no-anonymous element
contains a boolean value which specifies whether
mechanisms that accept anonymous login are
permitted. false to permit, true to deny.
no-dictionary
true
The optional nested no-dictionary element contains
a boolean value which specifies whether
mechanisms susceptible to passive dictionary
attacks are permitted. false to permit, true to deny.
no-plain-text
true
The optional nested no-plain-text element contains
a boolean value which specifies whether
mechanisms susceptible to simple plain passive
attacks (e.g., PLAIN) are not permitted. false to
permit, true to deny.
pass-credentials
true
The optional nested pass-credentials element
contains a boolean value which specifies whether
mechanisms that pass client credentials are
required.
Http Connector Attributes
The http-connector component has the following structure:
http-connector
property (same as connector)
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security (same as connector)
sasl (same as connector)
property (same as connector)
sasl-policy (same as connector)
policy (same as connector)
Table A.71. http-connector Attributes
Attribute
Default
Description
authentication-provider
The authentication-provider element contains the
name of the authentication provider to use for
incoming connections.
connector-ref
The name (or names) of a connector in the
Undertow subsystem to connect to.
sasl-protocol
remote
The protocol to pass into the SASL mechanisms
used for authentication.
security-realm
The associated security realm to use for
authentication for this connector.
server-name
The server name to send in the initial message
exchange and for SASL based authentication.
Outbound Connection Attributes
The outbound-connection component has the following structure:
outbound-connection
property
Table A.72. outbound-connection Attributes
Attribute
uri
384
Default
Description
The connection URI for the outbound connection.
APPENDIX A. REFERENCE MATERIAL
Table A.73. property Attributes
Attribute
Default
value
Description
The property value.
Note
The above property attributes are related to the XNIO Options that will be used during
the connection creation.
Remote Outbound Connection
The remote-outbound-connection component has the following structure:
remote-outbound-connection
property (same as outbound-connection)
Table A.74. remote-outbound-connection Attributes
Attribute
Default
Name of the outbound-socket-binding
which will be used to determine the destination
address and port for the connection.
outbound-socket-binding-ref
protocol
Description
http-remoting
The protocol to use for the remote connection.
Defaults to http-remoting .
security-realm
Reference to the security realm to use to obtain the
password and SSL configuration.
username
The user name to use when authenticating against
the remote server.
Local Outbound Connection Attributes
The local-outbound-connection component has the following structure:
local-outbound-connection
property (same as outbound-connection)
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Table A.75. local-outbound-connection Attributes
Attribute
Default
Description
Name of the outbound-socket-binding
which will be used to determine the destination
address and port for the connection.
outbound-socket-binding-ref
A.25. APACHE HTTP SERVER MOD_CLUSTER DIRECTIVES
The mod_cluster connector is an Apache HTTP Server-based load balancer. It uses a
communication channel to forward requests from the Apache HTTP Server to one of a set of
application server nodes. The following directives can be set to configure mod_cluster.
Note
There is no need to use ProxyPass directives because mod_cluster automatically
configures the URLs that must be forwarded to Apache HTTP Server.
Table A.76. mod_cluster Directives
Directive
Description
Values
CreateBalancers
Defines how the balancers are
created in the Apache HTTP
Server VirtualHosts. This allows
directives like: ProxyPass
0 : Create all VirtualHosts
/balancer://mycluster1
/.
(at least one ProxyPass or
ProxyMatch is required to
define the balancer names)
defined in Apache HTTP
Server
1 : Do not create balancers
2 : Create only the main
server (default)
UseAlias
LBstatusRecalTime
386
Check that the alias corresponds
to the server name.
Time interval in seconds for
load-balancing logic to
recalculate the status of a node.
0 : Ignore aliases (default)
1 : Check aliases
Default: 5 seconds
APPENDIX A. REFERENCE MATERIAL
Directive
Description
Values
WaitBeforeRemove
Time in seconds before a
removed node is forgotten by
httpd.
Default: 10 seconds
ProxyPassMatch/ProxyPass
ProxyPassMatch and ProxyPass
are mod_proxy directives which,
when using ! (instead of the
back-end URL), prevent reverseproxy in the path. This is used to
allow Apache HTTP Server to
serve static content. For
example: ProxyPassMatch
^(/.*\.gif)$ ! This
example allows the Apache
HTTP Server to serve the .gif
files directly.
A hot-standby node in the mod_cluster logic is the last resort node to which all requests are routed if
all other nodes are down. This is similar to the hot-standby logic in mod_proxy.
To configure a hot-standby node, replace the dynamic-load-provider in the mod_cluster subsystem
with a simple-load-provider with factor set to 0, for example:
In mod_cluster-manager console, the node is displayed with OK status and Load: 0.
For instance, if there are three nodes:
Node A, Load: 10
Node B, Load: 10
Node C, Load: 0
The load will be balanced between nodes A and B. If both the nodes are unavailable, node C will
take the load.
mod_manager
The context of a mod_manager directive is VirtualHost in all cases, except when mentioned
otherwise. server config context implies that the directive must be outside a VirtualHost
configuration. If not, an error message is displayed and the Apache HTTP Server does not start.
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Table A.77. mod_manager Directives
388
Directive
Description
Values
EnableMCPMReceive
Allow the VirtualHost to receive
the MCPM from the nodes.
Include EnableMCPMReceive in
the Apache HTTP Server
configuration to allow
mod_cluster to work. Save it in
the VirtualHost where you
configure advertising.
MemManagerFile
The base name for the names
that mod_manager uses to store
configuration, generate keys for
shared memory or locked files.
This must be an absolute path
name; the directories are
created if needed. It is
recommended that these files
are placed on a local drive and
not an NFS share. Context:
server config
$server_root/logs/
Maxcontext
The maximum number of
contexts supported by
mod_cluster. Context: server
config
Default: 100
Maxnode
The maximum number of nodes
supported by mod_cluster.
Context: server config
Default: 20
Maxhost
The maximum number of hosts
(aliases) supported by
mod_cluster. It also includes the
maximum number of balancers.
Context: server config
Default: 20
APPENDIX A. REFERENCE MATERIAL
Directive
Description
Values
Maxsessionid
The number of active sessionid
stored to provide the number of
active sessions in the
mod_cluster-manager handler. A
session is inactive when
mod_cluster does not receive
any information from the session
within 5 minutes. Context: server
config. This field is for
demonstration and debugging
purposes only.
0 : the logic is not activated.
MaxMCMPMaxMessSize
The maximum size of MCMP
messages from other Max
directives
Calculated from other Max
directives. Min: 1024
ManagerBalancerName
The name of balancer to use
when the JBoss EAP instance
does not provide a balancer
name.
mycluster
PersistSlots
Tells mod_slotmem to persist
nodes, aliases and contexts in
files. Context: server config
Off
CheckNonce
Switch check of nonce when
using mod_cluster-manager
handler.
on/off Default: on - Nonce
checked
AllowDisplay
Switch additional display on
mod_cluster-manager main
page.
on/off Default: off - only version
is displayed
AllowCmd
Allow commands using
mod_cluster-manager URL.
on/off Default: on - Commands
allowed
ReduceDisplay
Reduce the information
displayed on the main
mod_cluster-manager page, so
that more nodes can be
displayed on the page.
on/off Default: off - full
information is displayed
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Directive
Description
Values
SetHandler mod_clustermanager
Displays information about the
node that mod_cluster sees from
the cluster. The information
includes generic information and
additionally counts the number
of active sessions.
on/off Default: off
SetHandler
mod_cluster-manager
Require ip 127.0.0.1
Note
When accessing the location defined in httpd.conf:
Transferred: Corresponds to the POST data sent to the back-end server.
Connected: Corresponds to the number of requests that have been processed when
the mod_cluster status page was requested.
Num_sessions: Corresponds to the number of sessions mod_cluster report as active
(on which there was a request within the past 5 minutes). This field is not present
when Maxsessionid is zero and is for demonstration and debugging purposes only.
A.26. MOD_CLUSTER SUBSYSTEM ATTRIBUTES
The mod_cluster subsystem has the following structure:
mod-cluster-config
dynamic-load-provider
custom-load-metric
load-metric
ssl
Table A.78. mod-cluster-config Configuration Options
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APPENDIX A. REFERENCE MATERIAL
Attribute
Default
Description
advertise
true
Use Advertise logic or not.
advertise-security-key
String containing the security key for the Advertise
logic.
advertise-socket
Name of Socket binding to use for the Advertise
socket.
auto-enable-contexts
true
Enable contexts even if disabled in
mod_cluster_manager (httpd).
balancer
The balancer name.
connector
The name of Undertow listener that mod_cluster
reverse proxy will connect to.
excluded-contexts
List of contexts mod_cluster should ignore, Format
String separated with commas.
flush-packets
false
Enables/disables packet flushing in httpd.
flush-wait
-1
Time to wait before flushing packets in httpd. Max
value is 2,147,483,647 .
load-balancing-group
loadBalancingGroup name.
max-attempts
1
Max attempts to process an idempotent request.
Allowed values are between -1 and
2,147,483,647.
node-timeout
-1
Timeout (in seconds) for proxy connections to a
node. Allowed values are between -1 and
2,147,483,647.
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Attribute
Default
Description
ping
10
Time (in seconds) in which to wait for a pong
answer to a ping.
proxies
List of proxies for mod_cluster to register with
defined by outbound-socket-binding in socketbinding-group.
proxy-list
List of proxies. Format (hostname:port) separated
with commas.
Note
The proxy-list attribute has been
deprecated in favor of the proxies
attribute (list of references to outboundsocket-binding).
proxy-url
/
Base URL for MCMP requests.
session-draining-strategy
DEFAULT
Session draining strategy used during
undeployment of a web application.
simple-load-provider
392
Simple load provider. Allowed values are between
0 and 2,147,483,647.
smax
-1
Soft maximum idle connection count in httpd.
Allowed values are between -1 and
2,147,483,647.
socket-timeout
20
Timeout to wait for httpd to answer a MCMP
message. Allowed values are between 1 and
2,147,483,647.
status-interval
10
Number of seconds a STATUS message is sent
from the application server to the reverse proxy.
Allowed values are between 1 and
2,147,483,647.
APPENDIX A. REFERENCE MATERIAL
Attribute
Default
Description
sticky-session
true
Use sticky sessions for requests.
sticky-session-force
false
Do not fail over a request with session information.
sticky-session-remove
false
Remove session information on failover.
stop-context-timeout
10
Max time to wait for context to process pending
requests. Allowed values are between 1 and
2,147,483,647.
ttl
-1
Time to live (in seconds) for idle connections above
smax. Allowed values are between -1 and
2,147,483,647.
worker-timeout
-1
Timeout to wait in httpd for an available worker to
process the requests. Allowed values are between
-1 and 2,147,483,647.
Table A.79. dynamic-load-provider Configuration Options
Attribute
Default
Description
decay
2
Decay.
history
9
History.
Table A.80. custom-load-metric Attribute Options
Attribute
Default
Description
capacity
1.0
Capacity of the metric.
class
Class name of the custom metric.
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Attribute
Default
property
weight
Description
Properties for the metric.
1
Weight of the metric.
Table A.81. load-metric Attribute Options
Attribute
Default
Description
capacity
1.0
Capacity of the metric.
property
Properties for the metric.
type
Type of the metric.
weight
1
Weight of the metric.
Table A.82. ssl Attribute Options
Attribute
Description
ca-certificate-file
Certificate authority.
ca-revocation-url
Certificate authority revocation list.
certificate-key-file
394
Default
${user.home}/.
keystore
Key file for the certificate.
cipher-suite
The allowed cipher suite.
key-alias
The key alias.
APPENDIX A. REFERENCE MATERIAL
Attribute
Default
Description
password
changeit
Password.
protocol
TLS
The SSL protocols that are enabled.
A.27. MOD_JK WORKER PROPERTIES
The workers.properties file defines the behavior of the workers to which mod_jk passes client
requests. The workers.properties file defines where the different application servers are
located and the way the workload should be balanced across them.
The general structure of a property is worker.WORKER_NAME.DIRECTIVE. The WORKER_NAME is
a unique name that must match the instance-id configured in the JBoss EAP Undertow
subsystem. The DIRECTIVE is the setting to be applied to the worker.
Configuration Reference for Apache mod_jk Load Balancers
Templates specify default per-load-balancer settings. You can override the template within the loadbalancer settings itself.
Table A.83. Global properties
Property
Description
worker.list
A comma separated list of worker names that will be used by mod_jk.
Table A.84. Mandatory Directives
Property
Description
type
The type of worker. The default type is ajp13. Other possible values are
ajp14, lb, status . For more information on these directives, see the
Apache Tomcat Connectors Reference at
https://tomcat.apache.org/connectors-doc/reference/workers.html.
Table A.85. Load Balancing Directives
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Property
Description
balance_workers
Specifies the worker nodes that the load balancer must manage. You can use
the directive multiple times for the same load balancer. It consists of a commaseparated list of worker node names.
sticky_session
Specifies whether requests from the same session are always routed to the
same worker. The default is 1, meaning that sticky sessions are enabled. To
disable sticky sessions, set it to 0. Sticky sessions should usually be enabled,
unless all of your requests are truly stateless.
Table A.86. Connection Directives
Property
Description
host
The host name or IP address of the backend server. The backend server must
support the ajp protocol stack. The default value is localhost.
port
The port number of the backend server instance listening for defined protocol
requests. The default value is 8009, which is the default listening port for
AJP13 workers. The default value for AJP14 workers is 8011.
ping_mode
The conditions under which connections are probed for network status. The
probe uses an empty AJP13 packet for CPing, and expects a CPong in
response. Specify the conditions by using a combination of directive flags. The
flags are not separated by a comma or any white-space. The ping_mode can
be any combination of C, P, I, and A.
C - Connect. Probe the connection one time after connecting to the server.
Specify the timeout using the value of connect_timeout. Otherwise, the
value of ping_timeout is used.
P - Prepost. Probe the connection before sending each request to the
server. Specify the timeout using the prepost_timeout directive. Otherwise,
the value of ping_timeout is used.
I - Interval. Probe the connection at an interval specified by
connection_ping_interval, if present. Otherwise, the value of ping_timeout
is used.
A - All. A shortcut for CPI, which specifies that all connection probes are
used.
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APPENDIX A. REFERENCE MATERIAL
Property
Description
ping_timeout,
connect_timeout,
prepost_timeout,
connection_ping_interv
al
The timeout values for the connection probe settings above. The value is
specified in milliseconds, and the default value for ping_timeout is 10000.
lbfactor
Specifies the load-balancing factor for an individual backend server instance.
This is useful to give a more powerful server more of the workload. To give a
worker 3 times the default load, set this to 3:
worker.my_worker.lbfactor=3
The example below demonstrates load balancing with sticky sessions between two worker nodes
(node1 and node2) listening on port 8009.
Example workers.properties File
# Define list of workers that will be used for mapping requests
worker.list=loadbalancer,status
# Define Node1
# modify the host as your host IP or DNS name.
worker.node1.port=8009
worker.node1.host=node1.mydomain.com
worker.node1.type=ajp13
worker.node1.ping_mode=A
worker.node1.lbfactor=1
# Define Node2
# modify the host as your host IP or DNS name.
worker.node2.port=8009
worker.node2.host= node2.mydomain.com
worker.node2.type=ajp13
worker.node2.ping_mode=A
worker.node2.lbfactor=1
# Load-balancing behavior
worker.loadbalancer.type=lb
worker.loadbalancer.balance_workers=node1,node2
worker.loadbalancer.sticky_session=1
# Status worker for managing load balancer
worker.status.type=status
Further configuration details for Apache mod_jk are out of the scope of this document and can be
found in the Apache documentation.
A.28. SECURITY MANAGER SUBSYSTEM ATTRIBUTES
397
The security manager subsystem itself does not have configurable attributes, but it has one child
resource with configurable attributes: deployment-permissions=default.
Table A.87. default Configuration Options
Attribute
Default
Description
maximum-permissions
The maximum set of permissions that can be
granted to a deployment or jars.
minimum-permissions
The minimum set of permissions to be granted to a
deployment or jars.
Revised on 2016-09-19 11:52:49 EDT
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