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 …

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 …

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.

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 a specialized API for Kotlin? Check out the Log4j Kotlin project for details.

Log4j provides configuration options that discard log events if the load on the application is high. Using these options invalidates the reliability guarantees.

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 …

Log4j Core uses plugins to inject necessary components while reading a configuration file. In this section, we will explore extension points users can hook into to customize the way Log4j Core reads …

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.