Hello,

I am getting this error in my web application. Can anyone please let me know whats the reason for this error.

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java.rmi.RemoteException: EJB Exception: ; nested exception is: javax.ejb.EJBException: nested exception is: java.lang.Exception: com.wm.app.b2b.server.ServiceException: com.wm.zeus.pd.pdclient.API.WFException: Error code = 2. [WKB.024.0001] Authentication failed. com.wm.zeus.pd.authsrv.AuthenticationException: [WKA.020.0031] The logout operation failed, Login Failed: Returned null user at weblogic.rmi.internal.ServerRequest.sendReceive(ServerRequest.java:186) at weblogic.rmi.cluster.ReplicaAwareRemoteRef.invoke(ReplicaAwareRemoteRef.java:284) at weblogic.rmi.cluster.ReplicaAwareRemoteRef.invoke(ReplicaAwareRemoteRef.java:244) at com.xxx.apps.pa.services.appservices.workflow.Workflow_9jbtla_EOImpl_813_WLStub.createWFSession(Unknown Source) at com.xxx.apps.pa.serviceproxy.WorkflowProxy.createWFSession(WorkflowProxy.java:43) at com.xxx.apps.pa.ui.action.inbox.BatchListAction.execute(BatchListAction.java:111) at org.apache.struts.action.RequestProcessor.processActionPerform(RequestProcessor.java:484) at org.apache.struts.action.RequestProcessor.process(RequestProcessor.java:274) at org.apache.struts.action.ActionServlet.process(ActionServlet.java:1482) at org.apache.struts.action.ActionServlet.doGet(ActionServlet.java:507) at javax.servlet.http.HttpServlet.service(HttpServlet.java:740) at javax.servlet.http.HttpServlet.service(HttpServlet.java:853) at weblogic.servlet.internal.ServletStubImpl$ServletInvocationAction.run(ServletStubImpl.java:996) at weblogic.servlet.internal.ServletStubImpl.invokeServlet(ServletStubImpl.java:419) at weblogic.servlet.internal.ServletStubImpl.invokeServlet(ServletStubImpl.java:315) at weblogic.servlet.internal.WebAppServletContext$ServletInvocationAction.run(WebAppServletContext.java:6452) at weblogic.security.acl.internal.AuthenticatedSubject.doAs(AuthenticatedSubject.java:321) at weblogic.security.service.SecurityManager.runAs(SecurityManager.java:118) at weblogic.servlet.internal.WebAppServletContext.invokeServlet(WebAppServletContext.java:3661) at weblogic.servlet.internal.ServletRequestImpl.execute(ServletRequestImpl.java:2630) at weblogic.kernel.ExecuteThread.execute(ExecuteThread.java:219) at weblogic.kernel.ExecuteThread.run(ExecuteThread.java:178) Caused by: javax.ejb.EJBException: nested exception is: java.lang.Exception: com.wm.app.b2b.server.ServiceException: com.wm.zeus.pd.pdclient.API.WFException: Error code = 2. [WKB.024.0001] Authentication failed. com.wm.zeus.pd.authsrv.AuthenticationException: [WKA.020.0031] The logout operation failed, Login Failed: Returned null user at com.xxx.apps.pa.services.appservices.workflow.WorkflowBean.createWFSession(WorkflowBean.java:121) at com.xxx.apps.pa.services.appservices.workflow.Workflow_9jbtla_EOImpl.createWFSession(Workflow_9jbtla_EOImpl.java:367) at com.xxx.apps.pa.services.appservices.workflow.Workflow_9jbtla_EOImpl_WLSkel.invoke(Unknown Source) at weblogic.rmi.internal.ServerRequest.sendReceive(ServerRequest.java:166) … 21 more

Thanks