I have converted a portlet project into maven and created its war file . When I am deploying the war file , it does not generate any error in the websphere portal console but in the SystemOut.log file generates the following error log -----
[8/29/17 18:01:45:380 IST] 00006095 jsp W com.ibm.ws.jsp.taglib.TldParser endElement JSPG0235E: The JSP container failed to loa
d the TagExtraInfo class [org.apache.taglibs.standard.tei.XmlTransformTEI] from META-INF/x-1_0-rt.tld
[8/29/17 18:01:45:381 IST] 00006095 jsp W com.ibm.ws.jsp.taglib.TldParser endElement JSPG0235E: The JSP container failed to loa
d the TagExtraInfo class [org.apache.taglibs.standard.tei.XmlParseTEI] from META-INF/x-1_0.tld
[8/29/17 18:01:45:381 IST] 00006095 jsp W com.ibm.ws.jsp.taglib.TldParser endElement JSPG0235E: The JSP container failed to loa
d the TagExtraInfo class [org.apache.taglibs.standard.tei.XmlTransformTEI] from META-INF/x-1_0.tld
[8/29/17 18:01:45:381 IST] 00006095 jsp W com.ibm.ws.jsp.taglib.TldParser endElement JSPG0235E: The JSP container failed to loa
d the TagExtraInfo class [org.apache.taglibs.standard.tei.XmlParseTEI] from META-INF/x.tld
[8/29/17 18:01:45:382 IST] 00006095 jsp W com.ibm.ws.jsp.taglib.TldParser endElement JSPG0235E: The JSP container failed to loa
d the TagExtraInfo class [org.apache.taglibs.standard.tei.XmlTransformTEI] from META-INF/x.tld
[8/29/17 18:01:45:418 IST] 00006095 webapp E com.ibm.ws.webcontainer.webapp.WebApp commonInitializationFinally CWSRV0266E: Error o
ccured while initializing servlets: {0}
javax.servlet.UnavailableException: CWSRV0201E: Servlet [com.bluestar.servlet.InitializationServlet]: no
t a servlet class
at com.ibm.ws.webcontainer.servlet.ServletWrapper$1.run(ServletWrapper.java:1501)
at com.ibm.ws.security.util.AccessController.doPrivileged(AccessController.java:118)
at com.ibm.ws.webcontainer.servlet.ServletWrapper.loadServlet(ServletWrapper.java:1475)
at com.ibm.ws.webcontainer.servlet.ServletWrapper.loadOnStartupCheck(ServletWrapper.java:1354)
at com.ibm.ws.webcontainer.webapp.WebApp.doLoadOnStartupActions(WebApp.java:614)
at com.ibm.ws.webcontainer.webapp.WebApp.commonInitializationFinally(WebApp.java:584)
at com.ibm.ws.webcontainer.webapp.WebAppImpl.initialize(WebAppImpl.java:425)
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:746)
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:1177)
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:776)
at com.ibm.ws.runtime.component.ApplicationMgrImpl.startApplicationDynamically(ApplicationMgrImpl.java:1379)
at com.ibm.ws.runtime.component.ApplicationMgrImpl.start(ApplicationMgrImpl.java:2189)
at com.ibm.ws.runtime.component.CompositionUnitMgrImpl.start(CompositionUnitMgrImpl.java:446)
at com.ibm.ws.runtime.component.CompositionUnitImpl.start(CompositionUnitImpl.java:123)
at com.ibm.ws.runtime.component.CompositionUnitMgrImpl.start(CompositionUnitMgrImpl.java:389)
at com.ibm.ws.runtime.component.CompositionUnitMgrImpl.access$500(CompositionUnitMgrImpl.java:117)
at com.ibm.ws.runtime.component.CompositionUnitMgrImpl$1.run(CompositionUnitMgrImpl.java:664)
at com.ibm.ws.security.auth.ContextManagerImpl.runAs(ContextManagerImpl.java:5474)
at com.ibm.ws.security.auth.ContextManagerImpl.runAsSystem(ContextManagerImpl.java:5600)
at com.ibm.ws.security.core.SecurityContext.runAsSystem(SecurityContext.java:255)
at com.ibm.ws.runtime.component.CompositionUnitMgrImpl.startCompositionUnit(CompositionUnitMgrImpl.java:678)
at com.ibm.ws.runtime.component.CompositionUnitMgrImpl.startCompositionUnit(CompositionUnitMgrImpl.java:622)
at com.ibm.ws.runtime.component.ApplicationMgrImpl.startApplication(ApplicationMgrImpl.java:1269)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:88)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:55)
at java.lang.reflect.Method.invoke(Method.java:618)
at sun.reflect.misc.Trampoline.invoke(MethodUtil.java:87)
at sun.reflect.GeneratedMethodAccessor98.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:55)
at java.lang.reflect.Method.invoke(Method.java:618)
at sun.reflect.misc.MethodUtil.invoke(MethodUtil.java:291)
at javax.management.modelmbean.RequiredModelMBean$4.run(RequiredModelMBean.java:1260)
at java.security.AccessController.doPrivileged(AccessController.java:300)
at java.security.ProtectionDomain$1.doIntersectionPrivilege(ProtectionDomain.java:87)
at javax.management.modelmbean.RequiredModelMBean.invokeMethod(RequiredModelMBean.java:1254)
at javax.management.modelmbean.RequiredModelMBean.invoke(RequiredModelMBean.java:1092)
at com.sun.jmx.interceptor.DefaultMBeanServerInterceptor.invoke(DefaultMBeanServerInterceptor.java:831)
at com.sun.jmx.mbeanserver.JmxMBeanServer.invoke(JmxMBeanServer.java:813)
at com.ibm.ws.management.AdminServiceImpl$1.run(AdminServiceImpl.java:1335)
at com.ibm.ws.security.util.AccessController.doPrivileged(AccessController.java:118)
at com.ibm.ws.management.AdminServiceImpl.invoke(AdminServiceImpl.java:1228)
at com.ibm.ws.management.application.AppManagementImpl._startApplication(AppManagementImpl.java:1482)
at com.ibm.ws.management.application.AppManagementImpl.startApplication(AppManagementImpl.java:1371)
at com.ibm.ws.management.application.AppManagementImpl.startApplication(AppManagementImpl.java:1320)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:88)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:55)
at java.lang.reflect.Method.invoke(Method.java:618)
at sun.reflect.misc.Trampoline.invoke(MethodUtil.java:87)
at sun.reflect.GeneratedMethodAccessor98.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:55)
at java.lang.reflect.Method.invoke(Method.java:618)
at sun.reflect.misc.MethodUtil.invoke(MethodUtil.java:291)
at javax.management.modelmbean.RequiredModelMBean$4.run(RequiredModelMBean.java:1260)
at java.security.AccessController.doPrivileged(AccessController.java:300)
at java.security.ProtectionDomain$1.doIntersectionPrivilege(ProtectionDomain.java:87)
at javax.management.modelmbean.RequiredModelMBean.invokeMethod(RequiredModelMBean.java:1254)
at javax.management.modelmbean.RequiredModelMBean.invoke(RequiredModelMBean.java:1092)
at com.sun.jmx.interceptor.DefaultMBeanServerInterceptor.invoke(DefaultMBeanServerInterceptor.java:831)
at com.sun.jmx.mbeanserver.JmxMBeanServer.invoke(JmxMBeanServer.java:813)
at com.ibm.ws.management.AdminServiceImpl$1.run(AdminServiceImpl.java:1335)
at com.ibm.ws.security.util.AccessController.doPrivileged(AccessController.java:118)
at com.ibm.ws.management.AdminServiceImpl.invoke(AdminServiceImpl.java:1228)
at com.ibm.ws.management.connector.AdminServiceDelegator.invoke(AdminServiceDelegator.java:181)
at sun.reflect.GeneratedMethodAccessor327.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:55)
at java.lang.reflect.Method.invoke(Method.java:618)
at com.ibm.ws.management.connector.soap.SOAPConnector.invoke(SOAPConnector.java:488)
at com.ibm.ws.management.connector.soap.SOAPConnector.service(SOAPConnector.java:322)
at com.ibm.ws.management.connector.soap.SOAPConnection.handleRequest(SOAPConnection.java:65)
at com.ibm.ws.http.HttpConnection.readAndHandleRequest(HttpConnection.java:733)
at com.ibm.ws.http.HttpConnection.run(HttpConnection.java:522)
at com.ibm.ws.util.ThreadPool$Worker.run(ThreadPool.java:1864)
[8/29/17 18:01:45:419 IST] 00006095 webcontainer I com.ibm.ws.webcontainer.VirtualHostImpl addWebApplication CWSRV0250I: Web Module CMSMaterialRequestPortlet has been bound to default_host[*:10012,*:80,*:10014,*:10028,*:10029,*:443,*:10039,*:10042,*:10041].
[8/29/17 18:01:45:448 IST] 00006095 ApplicationMg A CWWSR0221I: Application started: PA_CMSMaterialRequest
[8/29/17 18:01:45:448 IST] 00006095 CompositionUn A CWWSR0191I: Composition unit WebSphere:cuname=PA_CMSMaterialRequest in BLA WebSphere:blaname=PA_CMSMaterialRequest started.
[8/29/17 18:03:00:842 IST] 000000f4 ServletWrappe E com.ibm.ws.webcontainer.servlet.ServletWrapper init Uncaught.init.exception.thrown.by.servlet
[8/29/17 18:03:00:848 IST] 000000f4 ServletWrappe E com.ibm.ws.webcontainer.servlet.ServletWrapper init Uncaught.init.exception.thrown.by.servlet
When I am assigning this portlet to a page in websphere portal & am trying to display the portlet gui , then it gives message as ' Portlet not available '. The original war file is created using ant and it is deployed successfully . I tested by deploying this original war file in my portal server and it is working perfectly fine .
Following are some of the lines of the exception that I got after changing the class loader ----- [9/8/17 1:57:53:969 IST] 0000019d AdminHelper A CWWMN1010I: An attempt is made to stop the PA_CMSMaterialRequest application. (User ID = defaultWIMFileBasedRealm/wasadmin) [9/8/17 1:57:53:970 IST] 0000019d CompositionUn A CWWSR0192I: Stopping composition unit WebSphere:cuname=PA_CMSMaterialRequest in BLA WebSphere:blaname=PA_CMSMaterialRequest. [9/8/17 1:57:53:975 IST] 0000019d ApplicationMg A CWWSR0217I: Stopping application: PA_CMSMaterialRequest [9/8/17 1:57:54:036 IST] 0000019d webapp I com.ibm.ws.webcontainer.webapp.WebApp log CWSRV0292I: Servlet Message - [PA_CMSMaterialRequest#CMSMRMSP-0.0.1-SN.war]:.Closing Spring root WebApplicationContext [9/8/17 1:57:54:722 IST] 0000019d ApplicationMg A CWWSR0220I: Application stopped: PA_CMSMaterialRequest [9/8/17 1:57:56:776 IST] 0000019d CompositionUn A CWWSR0193I: Composition unit WebSphere:cuname=PA_CMSMaterialRequest in BLA WebSphere:blaname=PA_CMSMaterialRequest stopped. [9/8/17 1:58:18:601 IST] 0000066b AdminHelper A CWWMN1008I: An attempt is made to start the PA_CMSMaterialRequest application. (User ID = defaultWIMFileBasedRealm/wasadmin) [9/8/17 1:58:18:664 IST] 0000066b CompositionUn A CWWSR0190I: Starting composition unit WebSphere:cuname=PA_CMSMaterialRequest in BLA WebSphere:blaname=PA_CMSMaterialRequest. [9/8/17 1:58:18:690 IST] 0000066b ApplicationMg A CWWSR0200I: Starting application: PA_CMSMaterialRequest [9/8/17 1:58:18:690 IST] 0000066b ApplicationMg A CWWSR0204I: Application: PA_CMSMaterialRequest Application build level: Unknown [9/8/17 1:58:21:625 IST] 0000066b webapp I com.ibm.ws.webcontainer.webapp.WebGroupImpl WebGroup CWSRV0169I: Loading Web Module: CMSMaterialRequestPortlet. [9/8/17 1:58:21:675 IST] 0000066b WASSessionCor I SessionContextRegistry getSessionContext CWSEN0176I: Will create a new session context for application key default_host/wps/PA_CMSMaterialRequest [9/8/17 1:58:21:694 IST] 0000066b MBeanDescript I CWWMN1216I: One or more methods in Portlet mbean is excluded from access check. [9/8/17 1:58:21:703 IST] 0000066b MBeanDescript I CWWMN1216I: One or more methods in PortletApplication mbean is excluded from access check. [9/8/17 1:58:22:099 IST] 0000066b webapp I com.ibm.ws.webcontainer.webapp.WebApp log CWSRV0292I: Servlet Message - [PA_CMSMaterialRequest#CMSMRMSP-0.0.1-SN.war]:.Initializing Spring root WebApplicationContext [9/8/17 1:58:22:100 IST] 0000066b ContextLoader I org.springframework.web.context.ContextLoader initWebApplicationContext Root WebApplicationContext: initialization started [9/8/17 1:58:22:245 IST] 0000066b XmlWebApplica I org.springframework.context.support.AbstractApplicationContext prepareRefresh Refreshing Root WebApplicationContext: startup date [Fri Sep 08 01:58:22 IST 2017]; root of context hierarchy [9/8/17 1:58:22:467 IST] 0000066b XmlBeanDefini I org.springframework.beans.factory.xml.XmlBeanDefinitionReader loadBeanDefinitions Loading XML bean definitions from ServletContext resource [/WEB-INF/applicationContext.xml] [9/8/17 1:58:22:645 IST] 0000066b ContextLoader E org.springframework.web.context.ContextLoader initWebApplicationContext Context initialization failed java.lang.NoClassDefFoundError: org.springframework.expression.ExpressionParser at java.lang.J9VMInternals.verifyImpl(Native Method) at java.lang.J9VMInternals.verify(J9VMInternals.java:94) at java.lang.J9VMInternals.initialize(J9VMInternals.java:171) at org.springframework.context.support.AbstractApplicationContext.prepareBeanFactory(AbstractApplicationContext.java:481) at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:398) at org.springframework.web.context.ContextLoader.createWebApplicationContext(ContextLoader.java:272) at org.springframework.web.context.ContextLoader.initWebApplicationContext(ContextLoader.java:196) at org.springframework.web.context.ContextLoaderListener.contextInitialized(ContextLoaderListener.java:47) at com.ibm.ws.webcontainer.webapp.WebApp.notifyServletContextCreated(WebApp.java:1686) 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:746) 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:1177) 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:776) at com.ibm.ws.runtime.component.ApplicationMgrImpl.startApplicationDynamically(ApplicationMgrImpl.java:1379) at com.ibm.ws.runtime.component.ApplicationMgrImpl.start(ApplicationMgrImpl.java:2189) at com.ibm.ws.runtime.component.CompositionUnitMgrImpl.start(CompositionUnitMgrImpl.java:446) at com.ibm.ws.runtime.component.CompositionUnitImpl.start(CompositionUnitImpl.java:123) at com.ibm.ws.runtime.component.CompositionUnitMgrImpl.start(CompositionUnitMgrImpl.java:389) at com.ibm.ws.runtime.component.CompositionUnitMgrImpl.access$500(CompositionUnitMgrImpl.java:117) at com.ibm.ws.runtime.component.CompositionUnitMgrImpl$1.run(CompositionUnitMgrImpl.java:664) at com.ibm.ws.security.auth.ContextManagerImpl.runAs(ContextManagerImpl.java:5474) at com.ibm.ws.security.auth.ContextManagerImpl.runAsSystem(ContextManagerImpl.java:5600) at com.ibm.ws.security.core.SecurityContext.runAsSystem(SecurityContext.java:255) at com.ibm.ws.runtime.component.CompositionUnitMgrImpl.startCompositionUnit(CompositionUnitMgrImpl.java:678) at com.ibm.ws.runtime.component.CompositionUnitMgrImpl.startCompositionUnit(CompositionUnitMgrImpl.java:622) at com.ibm.ws.runtime.component.ApplicationMgrImpl.startApplication(ApplicationMgrImpl.java:1269) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:88) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:55) at java.lang.reflect.Method.invoke(Method.java:618) at sun.reflect.misc.Trampoline.invoke(MethodUtil.java:87) at sun.reflect.GeneratedMethodAccessor36.invoke(Unknown Source) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:55) at java.lang.reflect.Method.invoke(Method.java:618) at sun.reflect.misc.MethodUtil.invoke(MethodUtil.java:291) at javax.management.modelmbean.RequiredModelMBean$4.run(RequiredModelMBean.java:1260) at java.security.AccessController.doPrivileged(AccessController.java:300) at java.security.ProtectionDomain$1.doIntersectionPrivilege(ProtectionDomain.java:87) at javax.management.modelmbean.RequiredModelMBean.invokeMethod(RequiredModelMBean.java:1254) at javax.management.modelmbean.RequiredModelMBean.invoke(RequiredModelMBean.java:1092) at com.sun.jmx.interceptor.DefaultMBeanServerInterceptor.invoke(DefaultMBeanServerInterceptor.java:831) at com.sun.jmx.mbeanserver.JmxMBeanServer.invoke(JmxMBeanServer.java:813) at com.ibm.ws.management.AdminServiceImpl$1.run(AdminServiceImpl.java:1335) at com.ibm.ws.security.util.AccessController.doPrivileged(AccessController.java:118) at com.ibm.ws.management.AdminServiceImpl.invoke(AdminServiceImpl.java:1228) at com.ibm.ws.management.commands.AdminServiceCommands$InvokeCmd.execute(AdminServiceCommands.java:251) at com.ibm.ws.console.core.mbean.MBeanHelper.invoke(MBeanHelper.java:241) at com.ibm.ws.console.appdeployment.ApplicationDeploymentCollectionAction.execute(ApplicationDeploymentCollectionAction.java:578) at org.apache.struts.action.RequestProcessor.processActionPerform(Unknown Source) at org.apache.struts.action.RequestProcessor.process(Unknown Source) at org.apache.struts.action.ActionServlet.process(Unknown Source) at org.apache.struts.action.ActionServlet.doPost(Unknown Source) at javax.servlet.http.HttpServlet.service(HttpServlet.java:595) at javax.servlet.http.HttpServlet.service(HttpServlet.java:668) at com.ibm.ws.webcontainer.servlet.ServletWrapper.service(ServletWrapper.java:1230) at com.ibm.ws.webcontainer.servlet.ServletWrapper.handleRequest(ServletWrapper.java:779) at com.ibm.ws.webcontainer.servlet.ServletWrapper.handleRequest(ServletWrapper.java:478) at com.ibm.ws.webcontainer.servlet.ServletWrapperImpl.handleRequest(ServletWrapperImpl.java:178) at com.ibm.ws.webcontainer.filter.WebAppFilterChain.invokeTarget(WebAppFilterChain.java:136) at com.ibm.ws.webcontainer.filter.WebAppFilterChain.doFilter(WebAppFilterChain.java:79) at com.ibm.ws.webcontainer.filter.WebAppFilterManager.doFilter(WebAppFilterManager.java:960) at com.ibm.ws.webcontainer.filter.WebAppFilterManager.invokeFilters(WebAppFilterManager.java:1064) at com.ibm.ws.webcontainer.webapp.WebAppRequestDispatcher.dispatch(WebAppRequestDispatcher.java:1385) at com.ibm.ws.webcontainer.webapp.WebAppRequestDispatcher.forward(WebAppRequestDispatcher.java:194) at org.apache.struts.action.RequestProcessor.doForward(Unknown Source) at org.apache.struts.tiles.TilesRequestProcessor.doForward(Unknown Source) at org.apache.struts.action.RequestProcessor.processForwardConfig(Unknown Source) at org.apache.struts.tiles.TilesRequestProcessor.processForwardConfig(Unknown Source) at org.apache.struts.action.RequestProcessor.process(Unknown Source) at org.apache.struts.action.ActionServlet.process(Unknown Source) at org.apache.struts.action.ActionServlet.doPost(Unknown Source) at javax.servlet.http.HttpServlet.service(HttpServlet.java:595) at javax.servlet.http.HttpServlet.service(HttpServlet.java:668) at com.ibm.ws.webcontainer.servlet.ServletWrapper.service(ServletWrapper.java:1230) at com.ibm.ws.webcontainer.servlet.ServletWrapper.handleRequest(ServletWrapper.java:779) at com.ibm.ws.webcontainer.servlet.ServletWrapper.handleRequest(ServletWrapper.java:478) at com.ibm.ws.webcontainer.servlet.ServletWrapperImpl.handleRequest(ServletWrapperImpl.java:178) at com.ibm.ws.webcontainer.filter.WebAppFilterChain.invokeTarget(WebAppFilterChain.java:136) at com.ibm.ws.webcontainer.filter.WebAppFilterChain.doFilter(WebAppFilterChain.java:97) at com.ibm.ws.console.core.servlet.WSCUrlFilter.setUpCommandAssistance(WSCUrlFilter.java:955) at com.ibm.ws.console.core.servlet.WSCUrlFilter.continueStoringTaskState(WSCUrlFilter.java:504) at com.ibm.ws.console.core.servlet.WSCUrlFilter.doFilter(WSCUrlFilter.java:325) at com.ibm.ws.webcontainer.filter.FilterInstanceWrapper.doFilter(FilterInstanceWrapper.java:195) at com.ibm.ws.webcontainer.filter.WebAppFilterChain.doFilter(WebAppFilterChain.java:91) at com.ibm.ws.webcontainer.filter.WebAppFilterManager.doFilter(WebAppFilterManager.java:960) at com.ibm.ws.webcontainer.filter.WebAppFilterManager.invokeFilters(WebAppFilterManager.java:1064) at com.ibm.ws.webcontainer.webapp.WebApp.handleRequest(WebApp.java:3837) at com.ibm.ws.webcontainer.webapp.WebGroup.handleRequest(WebGroup.java:304) at com.ibm.ws.webcontainer.WebContainer.handleRequest(WebContainer.java:981) at com.ibm.ws.webcontainer.WSWebContainer.handleRequest(WSWebContainer.java:1662)
The "not a Servlet class" message almost always indicates a packaging problem, in which the application includes its own copy of the Servlet API in a PARENT_LAST class loader. When the web app is started, the server's web container loads the Servlet class from the application. The web container links to the version of Servlet packaged in the server's Java EE APIs, while the application class links to the version of Servlet packaged along with it. Classes loaded by separate class loaders are considered incompatible by the JVM (regardless of their actual bytecode), so the resulting cast fails.
The solution is to either switch your web module's class loader to PARENT_FIRST or to remove the Servlet API (really, any Java EE APIs, unless you're explicitly using your own version of something) from your application. Either solution should eliminate this issue.