Log4JLogger does not implement Log when deploying on websphere 8.5.01

Question

I am facing this problem when trying to deploy an EAR file to websphere 8.5.0.1. The EAR only contains on its dependencies

commons-logging-1.1.3.jar, log4j-1.2.17.jar

and a single JSF page. As a remark, in the classpath by default must be a common-loggins copy, so deleting the library is not an option. The problem ocurs when initiliazing the server provided myfaces library, which needs commons-logging. The stack trace is pasted at the bottom. The application and we module classloaders are setted as parent last.

Any help will be highly appreciated

An error occured while initializing MyFaces: org.apache.commons.logging.LogConfigurationException: org.apache.commons.logging.LogConfigurationException: Class org.apache.commons.logging.impl.Log4JLogger does not implement Log
          org.apache.commons.logging.LogConfigurationException: org.apache.commons.logging.LogConfigurationException: org.apache.commons.logging.LogConfigurationException: Class org.apache.commons.logging.impl.Log4JLogger does not implement Log
    at org.apache.commons.logging.impl.LogFactoryImpl.newInstance(LogFactoryImpl.java:532)
    at org.apache.commons.logging.impl.LogFactoryImpl.getInstance(LogFactoryImpl.java:272)
    at org.apache.commons.logging.LogFactory.getLog(LogFactory.java:414)
    at org.apache.commons.digester.Digester.<init>(Digester.java:308)
    at org.apache.myfaces.config.impl.digester.DigesterFacesConfigUnmarshallerImpl.<init>(DigesterFacesConfigUnmarshallerImpl.java:42)
    at org.apache.myfaces.config.DefaultFacesConfigurationProvider.getUnmarshaller(DefaultFacesConfigurationProvider.java:93)
    at org.apache.myfaces.config.DefaultFacesConfigurationProvider.getStandardFacesConfig(DefaultFacesConfigurationProvider.java:131)
    at org.apache.myfaces.config.DefaultFacesConfigurationMerger.getFacesConfigData(DefaultFacesConfigurationMerger.java:69)
    at org.apache.myfaces.config.FacesConfigurator.configure(FacesConfigurator.java:456)
    at org.apache.myfaces.webapp.AbstractFacesInitializer.buildConfiguration(AbstractFacesInitializer.java:313)
    at org.apache.myfaces.webapp.Jsp21FacesInitializer.initContainerIntegration(Jsp21FacesInitializer.java:73)
    at org.apache.myfaces.webapp.AbstractFacesInitializer.initFaces(AbstractFacesInitializer.java:136)
    at org.apache.myfaces.webapp.StartupServletContextListener.contextInitialized(StartupServletContextListener.java:111)
    at com.ibm.ws.webcontainer.webapp.WebApp.notifyServletContextCreated(WebApp.java:1676)
    at com.ibm.ws.webcontainer.webapp.WebAppImpl.initialize(WebAppImpl.java:414)
    at com.ibm.ws.webcontainer.webapp.WebGroupImpl.addWebApplication(WebGroupImpl.java:88)
    at com.ibm.ws.webcontainer.VirtualHostImpl.addWebApplication(VirtualHostImpl.java:169)
    at com.ibm.ws.webcontainer.WSWebContainer.addWebApp(WSWebContainer.java:749)
    at com.ibm.ws.webcontainer.WSWebContainer.addWebApplication(WSWebContainer.java:634)
    at com.ibm.ws.webcontainer.component.WebContainerImpl.install(WebContainerImpl.java:426)
    at com.ibm.ws.webcontainer.component.WebContainerImpl.start(WebContainerImpl.java:718)
    at com.ibm.ws.runtime.component.ApplicationMgrImpl.start(ApplicationMgrImpl.java:1173)
    at com.ibm.ws.runtime.component.DeployedApplicationImpl.fireDeployedObjectStart(DeployedApplicationImpl.java:1370)
    at com.ibm.ws.runtime.component.DeployedModuleImpl.start(DeployedModuleImpl.java:639)
    at com.ibm.ws.runtime.component.DeployedApplicationImpl.start(DeployedApplicationImpl.java:968)
    at com.ibm.ws.runtime.component.ApplicationMgrImpl.startApplication(ApplicationMgrImpl.java:772)
    at com.ibm.ws.runtime.component.ApplicationMgrImpl.start(ApplicationMgrImpl.java:2175)
    at com.ibm.ws.runtime.component.CompositionUnitMgrImpl.start(CompositionUnitMgrImpl.java:445)
    at com.ibm.ws.runtime.component.CompositionUnitImpl.start(CompositionUnitImpl.java:123)
    at com.ibm.ws.runtime.component.CompositionUnitMgrImpl.start(CompositionUnitMgrImpl.java:388)
    at com.ibm.ws.runtime.component.CompositionUnitMgrImpl.access$500(CompositionUnitMgrImpl.java:116)
    at com.ibm.ws.runtime.component.CompositionUnitMgrImpl$CUInitializer.run(CompositionUnitMgrImpl.java:994)
    at com.ibm.wsspi.runtime.component.WsComponentImpl$_AsynchInitializer.run(WsComponentImpl.java:349)
    at com.ibm.ws.util.ThreadPool$Worker.run(ThreadPool.java:1814)
Caused by: org.apache.commons.logging.LogConfigurationException: org.apache.commons.logging.LogConfigurationException: Class org.apache.commons.logging.impl.Log4JLogger does not implement Log
    at org.apache.commons.logging.impl.LogFactoryImpl.getLogConstructor(LogFactoryImpl.java:416)
    at org.apache.commons.logging.impl.LogFactoryImpl.newInstance(LogFactoryImpl.java:525)
    ... 33 more
Caused by: org.apache.commons.logging.LogConfigurationException: Class org.apache.commons.logging.impl.Log4JLogger does not implement Log
    at org.apache.commons.logging.impl.LogFactoryImpl.getLogConstructor(LogFactoryImpl.java:412)
    ... 34 more

Answer 1

WAS leverages apache common logging for this reason using it in your EAR with Parent Last policy break the runtime consistency and you get that exception.

I suggest you to remove that jar from your application to use the WAS provided one. For further details: Configuring applications to use Jakarta Commons Logging