I am currently building a Jenkins plugin, where log4j does the logging. The log is redirected to the Jenkins console using
LoggerContext loggerContext = (LoggerContext) LogManager.getContext(false)
OutputStreamAppender fa = OutputStreamAppender.newBuilder()
.setName("jenkinslogger")
.setTarget(listener.getLogger())
.setLayout(PatternLayout.newBuilder().withPattern("%d{HH:mm:ss.SSS} [%t] %-5level %logger{36}:%L - %msg%n")
.build())
.setConfiguration(loggerContext.getConfiguration()).build();
fa.start();
loggerContext.getConfiguration().addAppender(fa);
loggerContext.getRootLogger().addAppender(loggerContext.getConfiguration().getAppender(fa.getName()));
loggerContext.updateLoggers();
where listener is the current TaskListener.
While everything works fine in Java 8, in Java 11, I get the following exception in the log:
2021-02-03 16:21:45.949+0000 [id=54] WARNING j.t.i.j.MissingClassTelemetry#reportException: Added a missed class for missing class telemetry. Class: sun.reflect.Reflection
java.lang.ClassNotFoundException: sun.reflect.Reflection
at jenkins.telemetry.impl.java11.CatcherClassLoader.findClass(CatcherClassLoader.java:47)
at java.base/java.lang.ClassLoader.loadClass(ClassLoader.java:589)
at java.base/java.lang.ClassLoader.loadClass(ClassLoader.java:522)
at org.apache.logging.log4j.util.LoaderUtil.loadClass(LoaderUtil.java:167)
at org.apache.logging.log4j.util.StackLocator.<clinit>(StackLocator.java:64)
at org.apache.logging.log4j.util.StackLocatorUtil.<clinit>(StackLocatorUtil.java:33)
at org.apache.logging.log4j.core.selector.ClassLoaderContextSelector.getContext(ClassLoaderContextSelector.java:139)
at org.apache.logging.log4j.core.selector.ClassLoaderContextSelector.getContext(ClassLoaderContextSelector.java:124)
at org.apache.logging.log4j.core.impl.Log4jContextFactory.getContext(Log4jContextFactory.java:230)
at org.apache.logging.log4j.core.impl.Log4jContextFactory.getContext(Log4jContextFactory.java:47)
at org.apache.logging.log4j.LogManager.getContext(LogManager.java:174)
at de.peass.ci.JenkinsLogRedirector.<init>(JenkinsLogRedirector.java:14)
at de.peass.ci.MeasureVersionBuilder.perform(MeasureVersionBuilder.java:66)
at jenkins.tasks.SimpleBuildStep.perform(SimpleBuildStep.java:123)
at hudson.tasks.BuildStepCompatibilityLayer.perform(BuildStepCompatibilityLayer.java:80)
at hudson.tasks.BuildStepMonitor$1.perform(BuildStepMonitor.java:20)
at hudson.model.AbstractBuild$AbstractBuildExecution.perform(AbstractBuild.java:804)
at hudson.model.Build$BuildExecution.build(Build.java:197)
at hudson.model.Build$BuildExecution.doRun(Build.java:163)
at hudson.model.AbstractBuild$AbstractBuildExecution.run(AbstractBuild.java:514)
at hudson.model.Run.execute(Run.java:1907)
at hudson.model.FreeStyleBuild.run(FreeStyleBuild.java:43)
at hudson.model.ResourceController.execute(ResourceController.java:97)
at hudson.model.Executor.run(Executor.java:429)
WARNING: sun.reflect.Reflection.getCallerClass is not supported. This will impact performance.
Afterwards, output is only displayed on the console. I supposed this has something to do with the multi-release flag (like described in Is log4j2 compatible with Java 11?), but adding Multi-Release: true manually to the MANIFEST.MF in the .hpi does not overcome the problem.
Does anyone know a solution / workaround, so that logs can be redirected in both Java 8 and 11?
