Question

I am trying to deploy an application on WAS 6.1 Server.

However, I am getting the below error:

java.lang.NoClassDefFoundError: org.apache.log4j.Logger
at myPackage.myClass.<clinit>(myClass.java:40)
at java.lang.J9VMInternals.initializeImpl(Native Method)
at java.lang.J9VMInternals.initialize(J9VMInternals.java:194)
at java.lang.Class.newInstanceImpl(Native Method)
at java.lang.Class.newInstance(Class.java:1328)
at com.ibm.ejs.container.EJSContainer.loadBeanMetaData(EJSContainer.java:1756)
at com.ibm.ejs.container.HomeOfHomes.loadBeanMetaData(HomeOfHomes.java:1073)
at com.ibm.ejs.container.HomeRecord.getHomeAndInitialize(HomeRecord.java:454)
at com.ibm.ejs.container.EJSContainer.getHomeWrapperCommon(EJSContainer.java:1322)
at com.ibm.ejs.container.EJSContainer.getHomeInstance(EJSContainer.java:1231)
at com.ibm.ejs.container.EJSContainer.startBean(EJSContainer.java:1217)
at com.ibm.ws.runtime.component.EJBContainerImpl.startBean(EJBContainerImpl.java:3385)
at com.ibm.ws.runtime.component.EJBContainerImpl.startModule(EJBContainerImpl.java:2589)
at com.ibm.ws.runtime.component.EJBContainerImpl.start(EJBContainerImpl.java:3719)
at com.ibm.ws.runtime.component.ApplicationMgrImpl.start(ApplicationMgrImpl.java:1304)
at com.ibm.ws.runtime.component.DeployedApplicationImpl.fireDeployedObjectStart(DeployedApplicationImpl.java:1165)
at com.ibm.ws.runtime.component.DeployedModuleImpl.start(DeployedModuleImpl.java:587)
at com.ibm.ws.runtime.component.DeployedApplicationImpl.start(DeployedApplicationImpl.java:832)
at com.ibm.ws.runtime.component.ApplicationMgrImpl.startApplication(ApplicationMgrImpl.java:950)
at com.ibm.ws.runtime.component.ApplicationMgrImpl$AppInitializer.run(ApplicationMgrImpl.java:2131)
at com.ibm.wsspi.runtime.component.WsComponentImpl$_AsynchInitializer.run(WsComponentImpl.java:342)
at com.ibm.ws.util.ThreadPool$Worker.run(ThreadPool.java:1473)
Caused by: java.lang.ClassNotFoundException: org.apache.log4j.Logger
at com.ibm.ws.classloader.CompoundClassLoader.findClass(CompoundClassLoader.java:579)
at com.ibm.ws.classloader.CompoundClassLoader.loadClass(CompoundClassLoader.java:414)
at java.lang.ClassLoader.loadClass(ClassLoader.java:597)
... 22 more

In

Admin Console -> Servers -> Application Servers -> myServerName -> Java and Process Management -> Process Definition -> Java Virtual Machine -> ClassPath

I have an entry as below:

${MY_JARS}\log4j-1.2.15.jar

Where in ‘Custom Properties’ MY_JARS key contains value as the path to the log4j jar

I did server clean and restart, republish, redeploy the application umpteen number of times. But this error is not going.

What am I doing wrong ?

Answer 1

To use ${MY_JARS} that way, you need to define it in Environment > WebSphere Variables, not in Custom Properties.

However I’d caution you about adding log4j in that manner. I seem to recall log4j might not work correctly if a single jar is shared across multiple apps. I think we attempted using log4j as a Shared Library (probably the more recommended way of doing what you’re trying to do, BTW), but ended up needing to deploy to each application’s WEB-INF/lib instead.