Java.lang.NullPointerException is displayed when selecting ·Products/Services Builder for Screens/Deployments/J2EE Session EJBs· in MCS

Technical Note USA12031
Created 23-Feb-2006

Applies To
Services Builder for Screens 3.0

Synapta

Management and Control Services

WebSphere 5.1 or 6.0

Symptoms

Java.lang.NullPointerException is displayed when selecting ·Products/Services Builder for Screens/Deployments/J2EE Session EJBs· in MCS

Full Error Message:

java.lang.NullPointerException
at com.ibm.ws.webcontainer.httpsession.SessionData.getValueGuts(SessionData.java(Compiled Code))
at com.ibm.ws.webcontainer.httpsession.SessionData.getValue(SessionData.java(Inlined Compiled Code))
at com.ibm.ws.webcontainer.httpsession.SessionData.getAttribute(SessionData.java(Compiled Code))
at com.attachmate.j2ee.deployment.mcsplugin.CommonHelper.getGenerationWorkerFromSession(CommonHelper.java:1229)
at com.attachmate.j2ee.deployment.mcsplugin.J2EESessionEJBPagesHelper.cleanupGenerationWorker(J2EESessionEJBPagesHelper.java:344)
at org.apache.jsp._J2EESessionEJBs._jspService(_J2EESessionEJBs.java:554)
at com.ibm.ws.webcontainer.jsp.runtime.HttpJspBase.service(HttpJspBase.java:89)
at javax.servlet.http.HttpServlet.service(HttpServlet.java(Compiled Code))
at com.ibm.ws.webcontainer.jsp.servlet.JspServlet$JspServletWrapper.service(JspServlet.java:344)
at com.ibm.ws.webcontainer.jsp.servlet.JspServlet.serviceJspFile(JspServlet.java:662)
at com.ibm.ws.webcontainer.jsp.servlet.JspServlet.service(JspServlet.java:760)
at javax.servlet.http.HttpServlet.service(HttpServlet.java(Compiled Code))
at com.ibm.ws.webcontainer.servlet.StrictServletInstance.doService(StrictServletInstance.java:110)
at com.ibm.ws.webcontainer.servlet.StrictLifecycleServlet._service(StrictLifecycleServlet.java:174)
at com.ibm.ws.webcontainer.servlet.IdleServletState.service(StrictLifecycleServlet.java:313)
at com.ibm.ws.webcontainer.servlet.StrictLifecycleServlet.service(StrictLifecycleServlet.java:116)
at com.ibm.ws.webcontainer.servlet.ServletInstance.service(ServletInstance.java:283)
at com.ibm.ws.webcontainer.servlet.ValidServletReferenceState.dispatch(ValidServletReferenceState.java:42)
at com.ibm.ws.webcontainer.servlet.ServletInstanceReference.dispatch(ServletInstanceReference.java:40)
at com.ibm.ws.webcontainer.webapp.WebAppRequestDispatcher.handleWebAppDispatch(WebAppRequestDispatcher.java:974)
at com.ibm.ws.webcontainer.webapp.WebAppRequestDispatcher.dispatch(WebAppRequestDispatcher.java:555)
at com.ibm.ws.webcontainer.webapp.WebAppRequestDispatcher.forward(WebAppRequestDispatcher.java:200)
at com.ibm.ws.webcontainer.srt.WebAppInvoker.doForward(WebAppInvoker.java:119)
at com.ibm.ws.webcontainer.srt.WebAppInvoker.handleInvocationHook(WebAppInvoker.java:276)
at com.ibm.ws.webcontainer.cache.invocation.CachedInvocation.handleInvocation(CachedInvocation.java:71)
at com.ibm.ws.webcontainer.srp.ServletRequestProcessor.dispatchByURI(ServletRequestProcessor.java:182)
at com.ibm.ws.webcontainer.oselistener.OSEListenerDispatcher.service(OSEListener.java:334)
at com.ibm.ws.webcontainer.http.HttpConnection.handleRequest(HttpConnection.java:56)
at com.ibm.ws.http.HttpConnection.readAndHandleRequest(HttpConnection.java:618)
at com.ibm.ws.http.HttpConnection.run(HttpConnection.java:443)
at com.ibm.ws.util.ThreadPool$Worker.run(ThreadPool.java(Compiled Code))

Fix

Please contact Attachmate Technical Support for information on a fix for this issue.Workaround:

1. Find and edit J2EESessionEJBs.jsp generally located in ·...\mcs.war\resources\connectordeploy·.
2. Comment out line reading 'support.cleanupGenerationWorker();' by putting two backslashes (·\\·) in front of it.
3. Stop and Restart MCS via the WebSphere Administrative Console; the servlet engine should recompile the JSP the next time it is loaded, if not restart WebSphere.