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https://issues.apache.org/jira/browse/LOG4J2-1256?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15103559#comment-15103559
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Dan Armbrust commented on LOG4J2-1256:
--------------------------------------
my log4j2.xml is pretty simple:
{code:xml}
<?xml version="1.0" encoding="UTF-8"?>
<Configuration>
<Appenders>
<Console name="STDOUT" target="SYSTEM_OUT">
<PatternLayout pattern="%d %-5p [%t] %C{2} (%F:%L) -
%m%n" />
</Console>
</Appenders>
<Loggers>
<Logger name="gov.va.oia.HK2Utilities" level="info" />
<Logger name="gov.vha.isaac.ochre.api.LookupService"
level="info" />
<Logger
name="gov.vha.isaac.ochre.api.collections.UuidIntMapMap" level="info" />
<Logger
name="gov.vha.isaac.ochre.model.waitfree.CasSequenceObjectMap" level="error" />
<Logger name="gov.vha.isaac.identifier.IdentifierProvider"
level="info" />
<Root level="debug">
<AppenderRef ref="STDOUT" />
</Root>
</Loggers>
</Configuration>
{code}
I haven't repackaged anything - I"m pulling these into the classpath of my mojo:
{code:xml}
<dependency>
<groupId>org.apache.logging.log4j</groupId>
<artifactId>log4j-core</artifactId>
<scope>compile</scope>
</dependency>
<dependency>
<groupId>org.apache.logging.log4j</groupId>
<artifactId>log4j-slf4j-impl</artifactId>
<scope>compile</scope>
</dependency>
<dependency>
<groupId>org.apache.logging.log4j</groupId>
<artifactId>log4j-jul</artifactId>
<scope>compile</scope>
</dependency>
{code}
While the version is pulled from a parent pom dependency management section
like so:
{code:xml}
<dependency>
<groupId>org.apache.logging.log4j</groupId>
<artifactId>log4j-bom</artifactId>
<version>2.5</version>
<scope>import</scope>
<type>pom</type>
</dependency>
{code}
> strange classloader failure
> ---------------------------
>
> Key: LOG4J2-1256
> URL: https://issues.apache.org/jira/browse/LOG4J2-1256
> Project: Log4j 2
> Issue Type: Bug
> Components: Core
> Affects Versions: 2.5
> Reporter: Dan Armbrust
>
> I am utilizing log4j in a maven mojo extension (code that plugs into maven,
> and executes as part of a mojo build)
> My code is encountering an internal error of its own - but when the code
> attempts to log the error, this happens:
> {code}
> Exception in thread "JavaFX Application Thread"
> java.lang.NoClassDefFoundError:
> org/apache/logging/log4j/core/impl/ThrowableProxy$CacheEntry
> at
> org.apache.logging.log4j.core.impl.ThrowableProxy.toCacheEntry(ThrowableProxy.java:560)
> at
> org.apache.logging.log4j.core.impl.ThrowableProxy.toExtendedStackTrace(ThrowableProxy.java:603)
> at
> org.apache.logging.log4j.core.impl.ThrowableProxy.<init>(ThrowableProxy.java:135)
> at
> org.apache.logging.log4j.core.impl.ThrowableProxy.<init>(ThrowableProxy.java:117)
> at
> org.apache.logging.log4j.core.impl.Log4jLogEvent.getThrownProxy(Log4jLogEvent.java:482)
> at
> org.apache.logging.log4j.core.pattern.ExtendedThrowablePatternConverter.format(ExtendedThrowablePatternConverter.java:64)
> at
> org.apache.logging.log4j.core.pattern.PatternFormatter.format(PatternFormatter.java:36)
> at
> org.apache.logging.log4j.core.layout.PatternLayout$PatternSerializer.toSerializable(PatternLayout.java:292)
> at
> org.apache.logging.log4j.core.layout.PatternLayout.toSerializable(PatternLayout.java:206)
> at
> org.apache.logging.log4j.core.layout.PatternLayout.toSerializable(PatternLayout.java:56)
> at
> org.apache.logging.log4j.core.layout.AbstractStringLayout.toByteArray(AbstractStringLayout.java:148)
> at
> org.apache.logging.log4j.core.appender.AbstractOutputStreamAppender.append(AbstractOutputStreamAppender.java:112)
> at
> org.apache.logging.log4j.core.config.AppenderControl.tryCallAppender(AppenderControl.java:152)
> at
> org.apache.logging.log4j.core.config.AppenderControl.callAppender0(AppenderControl.java:125)
> at
> org.apache.logging.log4j.core.config.AppenderControl.callAppenderPreventRecursion(AppenderControl.java:116)
> at
> org.apache.logging.log4j.core.config.AppenderControl.callAppender(AppenderControl.java:84)
> at
> org.apache.logging.log4j.core.config.LoggerConfig.callAppenders(LoggerConfig.java:390)
> at
> org.apache.logging.log4j.core.config.LoggerConfig.processLogEvent(LoggerConfig.java:378)
> at
> org.apache.logging.log4j.core.config.LoggerConfig.log(LoggerConfig.java:362)
> at
> org.apache.logging.log4j.core.config.LoggerConfig.log(LoggerConfig.java:352)
> at
> org.apache.logging.log4j.core.config.AwaitCompletionReliabilityStrategy.log(AwaitCompletionReliabilityStrategy.java:63)
> at org.apache.logging.log4j.core.Logger.logMessage(Logger.java:147)
> at
> org.apache.logging.log4j.spi.AbstractLogger.logMessage(AbstractLogger.java:1011)
> at
> org.apache.logging.log4j.spi.AbstractLogger.logIfEnabled(AbstractLogger.java:988)
> at
> org.apache.logging.log4j.spi.AbstractLogger.warn(AbstractLogger.java:1264)
> at gov.vha.isaac.ochre.api.task.TimedTask.failed(TimedTask.java:148)
> at javafx.concurrent.Task.setState(Task.java:708)
> at javafx.concurrent.Task$TaskCallable.lambda$call$502(Task.java:1453)
> at
> com.sun.javafx.application.PlatformImpl.lambda$null$174(PlatformImpl.java:295)
> at java.security.AccessController.doPrivileged(Native Method)
> at
> com.sun.javafx.application.PlatformImpl.lambda$runLater$175(PlatformImpl.java:294)
> at
> com.sun.glass.ui.InvokeLaterDispatcher$Future.run(InvokeLaterDispatcher.java:95)
> at com.sun.glass.ui.gtk.GtkApplication._runLoop(Native Method)
> at
> com.sun.glass.ui.gtk.GtkApplication.lambda$null$50(GtkApplication.java:139)
> at java.lang.Thread.run(Thread.java:745)
> Caused by: java.lang.ClassNotFoundException:
> org.apache.logging.log4j.core.impl.ThrowableProxy$CacheEntry
> at
> org.codehaus.plexus.classworlds.strategy.SelfFirstStrategy.loadClass(SelfFirstStrategy.java:50)
> at
> org.codehaus.plexus.classworlds.realm.ClassRealm.unsynchronizedLoadClass(ClassRealm.java:271)
> at
> org.codehaus.plexus.classworlds.realm.ClassRealm.loadClass(ClassRealm.java:247)
> at
> org.codehaus.plexus.classworlds.realm.ClassRealm.loadClass(ClassRealm.java:239)
> ... 35 more
> {code}
> This is very odd to me, as the class not found is an inner class, inside of a
> class that is obviously on the classpath (from the rest of the stack trace)
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