Apache Log4j is a versatile, industrial-grade Java logging framework composed of an API, its implementation, and components to assist the deployment for various use cases.
Log4j is essentially composed of a logging API called Log4j API, and its reference implementation called Log4j Core. Log4j also bundles several logging bridges to enable Log4j Core consume from foreign logging APIs.
Apache Log4j is a versatile, industrial-grade Java logging framework composed of an API, its implementation, and components to assist the deployment for various use cases.
Apache Log4j 2 is an upgrade to Log4j that provides significant improvements over its predecessor, Log4j 1.x, and provides many of the improvements available in Logback while fixing some inherent problems in Logback’s architecture.
Apache Log4j 2 is an upgrade to Log4j that provides significant improvements over its predecessor, Log4j 1.x, and provides many of the improvements available in Logback while fixing some inherent problems in Logback's architecture.
You can manually download all published Log4j distributions, verify them, and see their licensing information by following the instructions in the Download page of Logging Services.
This page tries to cover the most prominent Log4j API features. Did you know that Log4j provides specialized APIs for Kotlin and Scala? Check out Log4j Kotlin and Log4j Scala projects for details.
The spring-boot-starter-log4j2 artifact will automatically install Log4j Core, JUL-to-Log4j bridge, and configure them. You don’t need to add any other dependency or configure JUL anymore.
Log4j 2 is garbage free for stand-alone applications, and low garbage for web applications during steady state logging. This reduces pressure on the garbage collector and can give better response time performance.
