Why do i get java.lang.ClassCastException: org.apache.xerces.parsers.XIncludeAwareParserConfiguration in AS-5

    Problem

     

    When deploying your application in AS-5, you might see exception similar to this:

     

    16:05:36,907 ERROR [JBossContextConfig] XML error parsing: context.xml
    
    org.jboss.xb.binding.JBossXBRuntimeException: Failed to create a new SAX parser
    
         at org.jboss.xb.binding.UnmarshallerFactory$UnmarshallerFactoryImpl.newUnmarshaller(UnmarshallerFactory.java:100)
    
         at org.jboss.web.tomcat.service.deployers.JBossContextConfig.processContextConfig(JBossContextConfig.java:552)
    
         at org.jboss.web.tomcat.service.deployers.JBossContextConfig.init(JBossContextConfig.java:538)
    
         at org.apache.catalina.startup.ContextConfig.lifecycleEvent(ContextConfig.java:279)
    
         at org.apache.catalina.util.LifecycleSupport.fireLifecycleEvent(LifecycleSupport.java:117)
    
         at org.apache.catalina.core.StandardContext.init(StandardContext.java:5436)
    
         at org.apache.catalina.core.StandardContext.start(StandardContext.java:4148)
    
         at org.jboss.web.tomcat.service.deployers.TomcatDeployment.performDeployInternal(TomcatDeployment.java:367)
    
         at org.jboss.web.tomcat.service.deployers.TomcatDeployment.performDeploy(TomcatDeployment.java:146)
    
         at org.jboss.web.deployers.AbstractWarDeployment.start(AbstractWarDeployment.java:460)
    
         at org.jboss.web.deployers.WebModule.startModule(WebModule.java:118)
    
         at org.jboss.web.deployers.WebModule.start(WebModule.java:96)
    
         at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    
         at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
    
         at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
    
         at java.lang.reflect.Method.invoke(Method.java:585)
    
         at org.jboss.mx.interceptor.ReflectedDispatcher.invoke(ReflectedDispatcher.java:157)
    
         at org.jboss.mx.server.Invocation.dispatch(Invocation.java:96)
    
         at org.jboss.mx.server.Invocation.invoke(Invocation.java:88)
    
         at org.jboss.mx.server.AbstractMBeanInvoker.invoke(AbstractMBeanInvoker.java:264)
    
         at org.jboss.mx.server.MBeanServerImpl.invoke(MBeanServerImpl.java:668)
    
         at org.jboss.system.microcontainer.ServiceProxy.invoke(ServiceProxy.java:206)
    
         at $Proxy36.start(Unknown Source)
    
         at org.jboss.system.microcontainer.StartStopLifecycleAction.installAction(StartStopLifecycleAction.java:42)
    
         at org.jboss.system.microcontainer.StartStopLifecycleAction.installAction(StartStopLifecycleAction.java:37)
    
         at org.jboss.dependency.plugins.action.SimpleControllerContextAction.simpleInstallAction(SimpleControllerContextAction.java:62)
    
         at org.jboss.dependency.plugins.action.AccessControllerContextAction.install(AccessControllerContextAction.java:71)
    
         at org.jboss.dependency.plugins.AbstractControllerContextActions.install(AbstractControllerContextActions.java:51)
    
         at org.jboss.dependency.plugins.AbstractControllerContext.install(AbstractControllerContext.java:348)
    
         at org.jboss.system.microcontainer.ServiceControllerContext.install(ServiceControllerContext.java:286)
    
         at org.jboss.dependency.plugins.AbstractController.install(AbstractController.java:1598)
    
         at org.jboss.dependency.plugins.AbstractController.incrementState(AbstractController.java:934)
    
         at org.jboss.dependency.plugins.AbstractController.resolveContexts(AbstractController.java:1062)
    
         at org.jboss.dependency.plugins.AbstractController.resolveContexts(AbstractController.java:984)
    
         at org.jboss.dependency.plugins.AbstractController.change(AbstractController.java:822)
    
         at org.jboss.dependency.plugins.AbstractController.change(AbstractController.java:553)
    
         at org.jboss.system.ServiceController.doChange(ServiceController.java:688)
    
         at org.jboss.system.ServiceController.start(ServiceController.java:460)
    
         at org.jboss.system.deployers.ServiceDeployer.start(ServiceDeployer.java:146)
    
         at org.jboss.system.deployers.ServiceDeployer.deploy(ServiceDeployer.java:104)
    
         at org.jboss.system.deployers.ServiceDeployer.deploy(ServiceDeployer.java:45)
    
         at org.jboss.deployers.spi.deployer.helpers.AbstractSimpleRealDeployer.internalDeploy(AbstractSimpleRealDeployer.java:62)
    
         at org.jboss.deployers.spi.deployer.helpers.AbstractRealDeployer.deploy(AbstractRealDeployer.java:50)
    
         at org.jboss.deployers.plugins.deployers.DeployerWrapper.deploy(DeployerWrapper.java:171)
    
         at org.jboss.deployers.plugins.deployers.DeployersImpl.doDeploy(DeployersImpl.java:1439)
    
         at org.jboss.deployers.plugins.deployers.DeployersImpl.doInstallParentFirst(DeployersImpl.java:1157)
    
         at org.jboss.deployers.plugins.deployers.DeployersImpl.doInstallParentFirst(DeployersImpl.java:1178)
    
         at org.jboss.deployers.plugins.deployers.DeployersImpl.install(DeployersImpl.java:1098)
    
         at org.jboss.dependency.plugins.AbstractControllerContext.install(AbstractControllerContext.java:348)
    
         at org.jboss.dependency.plugins.AbstractController.install(AbstractController.java:1598)
    
         at org.jboss.dependency.plugins.AbstractController.incrementState(AbstractController.java:934)
    
         at org.jboss.dependency.plugins.AbstractController.resolveContexts(AbstractController.java:1062)
    
         at org.jboss.dependency.plugins.AbstractController.resolveContexts(AbstractController.java:984)
    
         at org.jboss.dependency.plugins.AbstractController.change(AbstractController.java:822)
    
         at org.jboss.dependency.plugins.AbstractController.change(AbstractController.java:553)
    
         at org.jboss.deployers.plugins.deployers.DeployersImpl.process(DeployersImpl.java:781)
    
         at org.jboss.deployers.plugins.main.MainDeployerImpl.process(MainDeployerImpl.java:545)
    
         at org.jboss.system.server.profileservice.ProfileServiceBootstrap.loadProfile(ProfileServiceBootstrap.java:304)
    
         at org.jboss.system.server.profileservice.ProfileServiceBootstrap.start(ProfileServiceBootstrap.java:205)
    
         at org.jboss.bootstrap.AbstractServerImpl.start(AbstractServerImpl.java:405)
    
         at org.jboss.Main.boot(Main.java:209)
    
         at org.jboss.Main$1.run(Main.java:547)
    
         at java.lang.Thread.run(Thread.java:595)
    
    Caused by: org.jboss.xb.binding.JBossXBException: Failed to create a new SAX parser
    
         at org.jboss.xb.binding.parser.sax.SaxJBossXBParser.(SaxJBossXBParser.java:97)
    
         at org.jboss.xb.binding.UnmarshallerImpl.(UnmarshallerImpl.java:56)
    
         at org.jboss.xb.binding.UnmarshallerFactory$UnmarshallerFactoryImpl.newUnmarshaller(UnmarshallerFactory.java:96)
    
         ... 62 more
    
    Caused by: java.lang.ClassCastException: org.apache.xerces.parsers.XIncludeAwareParserConfiguration
    
         at org.apache.xerces.parsers.SAXParser.(Unknown Source)
    
         at org.apache.xerces.parsers.SAXParser.(Unknown Source)
    
         at org.apache.xerces.jaxp.SAXParserImpl$JAXPSAXParser.(Unknown Source)
    
         at org.apache.xerces.jaxp.SAXParserImpl.(Unknown Source)
    
         at org.apache.xerces.jaxp.SAXParserFactoryImpl.newSAXParser(Unknown Source)
    
         at org.jboss.xb.binding.parser.sax.SaxJBossXBParser.(SaxJBossXBParser.java:92)
    
         ... 64 more
    

     

     

    Cause:

     

    You are probably packaging xerces related jar(s) (ex: xercesImpl.jar) in your application. JBoss AS ships the xerces related jar in its JBOSS_HOME/lib/endorsed folder. If your application packages this jar then it leads to a classlaoder issue ultimately resulting in the ClassCastException

     

    Workaround:

     

    - Remove the xerces related jar file(s) from your application packaging

     

    Why can't i scope my application for classloading so that i can ship a different version of xercesImpl?

     

    Instead of removing the xerces jar file from your application, you could probably have setup classloader isolation for your application. But that does not work with xerces jars.It's because of this bug https://jira.jboss.org/jira/browse/JBAS-7210

     

     

    Forum references

     

    More discussion about this is here in these forum threads

     

    http://www.jboss.org/index.html?module=bb&op=viewtopic&t=158645

    http://www.jboss.org/index.html?module=bb&op=viewtopic&t=159953