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Apache Log4j 2 is a versatile, feature-rich, efficient logging API and backend for Java.

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This change introduces a new execution of the Flatten Maven Plugin for non-BOM modules, aimed at simplifying their published POMs while preserving important metadata and build integrity. ### Key changes...

Bumps `log4j-api.version` from 2.24.3 to 2.25.1. Updates `org.apache.logging.log4j:log4j-api` from 2.24.3 to 2.25.1 Updates `org.apache.logging.log4j:log4j-api-test` from 2.24.3 to 2.25.1 Updates `org.apache.logging.log4j:log4j-iostreams` from 2.24.3 to 2.25.1 Updates `org.apache.logging.log4j:log4j-jpl` from 2.24.3 to 2.25.1...

dependencies
java

Bumps `maven.version` from 3.9.10 to 3.9.11. Updates `org.apache.maven:maven-core` from 3.9.10 to 3.9.11 Updates `org.apache.maven:maven-model` from 3.9.10 to 3.9.11 You can trigger a rebase of this PR by commenting `@dependabot rebase`....

dependencies
java

Fix several instances where Maps were sized incorrectly when the number of elements to insert is known; specifying the capacity without taking into account the load factor meant it would...

[As discussed here](https://github.com/apache/logging-log4j2/pull/3877#discussion_r2284431460), DI in `3.x` supports no-args methods annotated with `@Inject` – yet there are no use cases, not even one we make use of ourselves. I suggest removing...

api
plugins

`ConfigurationFactory` implementations should override `isActive()` and throw `IllegalStateException` when they are used (e.g., via `getSupportedTypes()`) in inactive state. This change sufficiently be tested too. See [this comment](https://github.com/apache/logging-log4j2/pull/3839#issuecomment-3211804379) on #3839 for...

bug
configuration

JTL documentation should we reworded to explain valid use cases of `PatternLayout` fallback, instead of completely banishing it. See the discussion https://github.com/apache/logging-log4j2/discussions/3890 for details.

documentation
layouts

PR #3874 needs to be cherry-picked to `main`

With the upcoming release of Maven `4.0.0`, we should begin evaluating the compatibility of its release candidates with Log4j. Maven 4 introduces several significant changes that are highly relevant to...

The Log4j annotation processor should be enhanced to generate and store metadata related to the dependencies of plugins. This should help with implementing https://github.com/apache/logging-log4j2/issues/3055 as dependency information needs to be...

plugins
graalvm