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https://issues.apache.org/jira/browse/TOMEE-4390?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Markus Jung updated TOMEE-4390:
-------------------------------
Fix Version/s: 10.0.0-M3
> ClassNotFoundException in webapp that has log4j2 and invokes commons-logging
> ----------------------------------------------------------------------------
>
> Key: TOMEE-4390
> URL: https://issues.apache.org/jira/browse/TOMEE-4390
> Project: TomEE
> Issue Type: Bug
> Components: TomEE Core Server
> Affects Versions: 10.0.0-M2
> Reporter: Markus Jung
> Priority: Major
> Fix For: 10.0.0-M3
>
> Attachments: log4j2-commons-logging.zip
>
>
> Accessing commons-logging throws an exception when it is being invoked in an
> application that has a log4j2 dependency but no commons-logging dependency.
> Might possibly also be a commons-logging bug? Really not sure
> The layout is basically:
> * tomee
> ** libs/
> *** commons-logging.jar
> ** webapps/ROOT/WEB-INF/libs
> *** log4j2-api/core.jar
>
> This causes the following to happen:
> # commons-logging checks the current thread classloader for a log4j2 class
> # if it finds one, it creates an instance of Log4jApiLogFactory
> # while doing so, java tries to load the class
> org.apache.logging.log4j.spi.LoggerAdapter using the classloader that loaded
> commons-logging.jar
> # ClassNotFoundException with a very incomprehensible stacktrace
>
> See attached reproducer, simply run mvn package tomee:run
>
> Stacktrace:
> {code:java}
> Caused by: java.lang.NoClassDefFoundError:
> org/apache/logging/log4j/spi/LoggerAdapter
> at java.base/java.lang.Class.forName0(Native Method)
> at java.base/java.lang.Class.forName(Class.java:375)
> at
> org.apache.commons.logging.LogFactory.createFactory(LogFactory.java:419)
> at
> org.apache.commons.logging.LogFactory.lambda$newFactory$3(LogFactory.java:1431)
> at
> java.base/java.security.AccessController.doPrivileged(AccessController.java:318)
> at
> org.apache.commons.logging.LogFactory.newFactory(LogFactory.java:1431)
> at
> org.apache.commons.logging.LogFactory.getFactory(LogFactory.java:928)
> at
> org.apache.commons.logging.LogFactory.getLog(LogFactory.java:987)
> at
> com.example.ExampleBean.initApplication(ExampleBean.java:15)
> at
> java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
> at
> java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:77)
> at
> java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
> at java.base/java.lang.reflect.Method.invoke(Method.java:569)
> at
> org.apache.webbeans.event.ObserverMethodImpl.invoke(ObserverMethodImpl.java:410)
> at
> org.apache.webbeans.event.ObserverMethodImpl.notify(ObserverMethodImpl.java:371)
> ... 49 more
> Caused by: java.lang.ClassNotFoundException:
> org.apache.logging.log4j.spi.LoggerAdapter
> at
> java.base/java.net.URLClassLoader.findClass(URLClassLoader.java:445)
> at
> java.base/java.lang.ClassLoader.loadClass(ClassLoader.java:592)
> at
> java.base/java.lang.ClassLoader.loadClass(ClassLoader.java:525)
> ... 64 more
> {code}
>
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