Apache Log4j 2 Users Guide 2.x

User Manual:

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Table of Contents
Introduction
Architecture
Log4j 1.x Migration
API
Configuration
Web Applications and JSPs
Plugins
Lookups
Appenders
Layouts
Filters
Async Loggers
Garbage-free Logging
JMX
Logging Separation
Extending Log4j
Programmatic Log4j Configuration
Custom Log Levels

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