[LOG4J2-1051] NoClassDefFoundError when starting app on Google App Engine

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Fix Version/s: 2.4, 2.7
• Component/s: Core

Environment

master branch, JDK7, Google App Engine, Apache Struts 2.5

• Assignee: Remko Popma
• Reporter: Lukasz Lenart
• Created: 11/Jun/15 06:05
• Updated: 21/Sep/16 06:09
• Resolved: 14/Sep/16 15:47

Description

I have an app that uses

• log4j-api
• log4j-core
• log4j-web

and after deploying it to GAE I see such exception in the logs

2015-06-10 23:01:05.768
Uncaught exception from servlet
java.lang.NoClassDefFoundError: Could not initialize class org.apache.logging.log4j.core.util.Loader
	at org.apache.logging.log4j.core.lookup.Interpolator.<init>(Interpolator.java:114)
	at org.apache.logging.log4j.core.config.AbstractConfiguration.<init>(AbstractConfiguration.java:105)
	at org.apache.logging.log4j.core.config.NullConfiguration.<init>(NullConfiguration.java:30)
	at org.apache.logging.log4j.core.LoggerContext.<clinit>(LoggerContext.java:62)
	at org.apache.logging.log4j.core.selector.ClassLoaderContextSelector.locateContext(ClassLoaderContextSelector.java:145)
	at org.apache.logging.log4j.core.selector.ClassLoaderContextSelector.getContext(ClassLoaderContextSelector.java:70)
	at org.apache.logging.log4j.core.selector.ClassLoaderContextSelector.getContext(ClassLoaderContextSelector.java:57)
	at org.apache.logging.log4j.core.impl.Log4jContextFactory.getContext(Log4jContextFactory.java:142)
	at org.apache.logging.log4j.core.impl.Log4jContextFactory.getContext(Log4jContextFactory.java:42)
	at org.apache.logging.log4j.LogManager.getContext(LogManager.java:175)
	at org.apache.logging.log4j.LogManager.getLogger(LogManager.java:426)
	at org.apache.struts2.tiles.StrutsTilesListener.<clinit>(StrutsTilesListener.java:50)
	at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
	at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:57)
	at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
	at java.lang.reflect.Constructor.newInstance(Constructor.java:526)
	at java.lang.Class.newInstance(Class.java:375)
	at org.mortbay.jetty.webapp.WebXmlConfiguration.newListenerInstance(WebXmlConfiguration.java:650)
	at org.mortbay.jetty.webapp.WebXmlConfiguration.initListener(WebXmlConfiguration.java:631)
	at org.mortbay.jetty.webapp.WebXmlConfiguration.initWebXmlElement(WebXmlConfiguration.java:368)
	at org.mortbay.jetty.webapp.WebXmlConfiguration.initialize(WebXmlConfiguration.java:289)
	at org.mortbay.jetty.webapp.WebXmlConfiguration.configure(WebXmlConfiguration.java:222)
	at org.mortbay.jetty.webapp.WebXmlConfiguration.configureWebApp(WebXmlConfiguration.java:180)
	at org.mortbay.jetty.webapp.WebAppContext.startContext(WebAppContext.java:1247)
	at org.mortbay.jetty.handler.ContextHandler.doStart(ContextHandler.java:517)
	at org.mortbay.jetty.webapp.WebAppContext.doStart(WebAppContext.java:467)
	at org.mortbay.component.AbstractLifeCycle.start(AbstractLifeCycle.java:50)
	at com.google.apphosting.runtime.jetty.AppVersionHandlerMap.createHandler(AppVersionHandlerMap.java:199)
	at com.google.apphosting.runtime.jetty.AppVersionHandlerMap.getHandler(AppVersionHandlerMap.java:174)
	at com.google.apphosting.runtime.jetty.JettyServletEngineAdapter.serviceRequest(JettyServletEngineAdapter.java:134)
	at com.google.apphosting.runtime.JavaRuntime$RequestRunnable.run(JavaRuntime.java:527)
	at com.google.tracing.TraceContext$TraceContextRunnable.runInContext(TraceContext.java:437)
	at com.google.tracing.TraceContext$TraceContextRunnable$1.run(TraceContext.java:444)
	at com.google.tracing.CurrentContext.runInContext(CurrentContext.java:230)
	at com.google.tracing.TraceContext$AbstractTraceContextCallback.runInInheritedContextNoUnref(TraceContext.java:308)
	at com.google.tracing.TraceContext$AbstractTraceContextCallback.runInInheritedContext(TraceContext.java:300)
	at com.google.tracing.TraceContext$TraceContextRunnable.run(TraceContext.java:441)
	at com.google.apphosting.runtime.ThreadGroupPool$PoolEntry.run(ThreadGroupPool.java:251)
	at java.lang.Thread.run(Thread.java:745)

Issue Links

• relates to: LOG4J2-1035 Log4j2 tries to SystemClassLoader when running on Google AppEngine