Fix Android-related issues in Log4j Core #3071
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This fixes three issues encountered in the [`log4j-samples-android`](https://github.com/apache/logging-log4j-samples/tree/main/log4j-samples-android) test project: 1. Disables the `jvmrunargs` lookup on Android and fixes it on the other platforms. Previously, the lookup always returned `null`. 2. Switches the default context selector to `BasicContextSelector` on Android. `StackLocator` is broken on Android: it cannot use our JDK 8 code (missing `sun.reflect` classes), but also it cannot use our JDK 11+ code (missing multi-release JAR support). This causes `ClassLoaderContextSelector` to use two different logger contexts for the same classloader. 3. Fixes a `ParserConfigurationException` caused by the lack of XInclude capabilities in Android's XML parser. The fix to [LOG4J2-3531](https://issues.apache.org/jira/browse/LOG4J2-3531) didn't cover all the cases. Closes #3056. Part of #2832.
vy
approved these changes
Oct 9, 2024
...-core/src/main/java/org/apache/logging/log4j/core/lookup/JmxRuntimeInputArgumentsLookup.java
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@vy, I added a FAQ entry in fbd4ea0. Since this PR can not be tested, until we publish a snapshot and the external |
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The CI build 11273365001 confirms that a simple application on Android functions correctly with Log4j Core. |
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This fixes three issues encountered in the
log4j-samples-androidtest project:jvmrunargslookup on Android and fixes it on the other platforms. Previously, the lookup always returnednull.BasicContextSelectoron Android.StackLocatoris broken on Android: it cannot use our JDK 8 code (missingsun.reflectclasses), but also it cannot use our JDK 11+ code (missing multi-release JAR support). This causesClassLoaderContextSelectorto use two different logger contexts for the same classloader.ParserConfigurationExceptioncaused by the lack of XInclude capabilities in Android's XML parser. The fix to LOG4J2-3531 didn't cover all the cases.Closes #3056.
Part of #2832.