Re: Facelets: Back button, then nav-link click produces NPE

>
> Hi, I'm using MyFaces + Facelets + Trinidad + WebLogic 10.3.5.
>
> When trying to use the back button to backtrack to previous pages, it seems
> the pages themselves are in the browser chache and do display alright.  Yet,
> when I try to use any Trinidad link or command button, I get a
> NullPointerException.  This is happing on every page on the site.  Yet, if I
> hit the back button, then, refresh the resulting cached page, then the
> forward navigation items work just fine.  What is going wrong here:
>
> java.lang.NullPointerException
>        at
> org.apache.myfaces.application.ApplicationImpl._traverseListenerList(ApplicationImpl.java:2344)
>        at
> org.apache.myfaces.application.ApplicationImpl.publishEvent(ApplicationImpl.java:563)
>        at
> org.apache.myfaces.application.ApplicationImpl.publishEvent(ApplicationImpl.java:593)
>        at
> org.apache.myfaces.application.NavigationHandlerImpl$PreDisposeViewCallback.visit(NavigationHandlerImpl.java:236)
>        at
> org.apache.myfaces.component.visit.FullVisitContext.invokeVisitCallback(FullVisitContext.java:141)
>        at
> org.apache.myfaces.trinidad.component.UIXComponent.visitTree(UIXComponent.java:505)
>        at
> org.apache.myfaces.trinidad.component.UIXComponent.visitTree(UIXComponent.java:354)
>        at
> org.apache.myfaces.trinidad.component.UIXComponent.visitAllChildren(UIXComponent.java:411)
>        at
> org.apache.myfaces.trinidad.component.UIXComponent.visitChildren(UIXComponent.java:392)
>        at
> org.apache.myfaces.trinidad.component.UIXComponent.visitChildren(UIXComponent.java:669)
>        at
> org.apache.myfaces.trinidad.component.UIXComponent.visitTree(UIXComponent.java:532)
>        at
> org.apache.myfaces.trinidad.component.UIXComponent.visitTree(UIXComponent.java:354)
>        at
> org.apache.myfaces.trinidad.component.UIXComponent.visitAllChildren(UIXComponent.java:411)
>        at
> org.apache.myfaces.trinidad.component.UIXComponent.visitChildren(UIXComponent.java:392)
>        at
> org.apache.myfaces.trinidad.component.UIXComponent.visitChildren(UIXComponent.java:669)
>        at
> org.apache.myfaces.trinidad.component.UIXComponent.visitTree(UIXComponent.java:532)
>        at
> org.apache.myfaces.trinidad.component.UIXComponent.visitTree(UIXComponent.java:354)
>        at
> org.apache.myfaces.trinidad.component.UIXDocument.visitTree(UIXDocument.java:82)
>        at javax.faces.component.UIComponent.visitTree(UIComponent.java:958)
>        at
> javax.faces.component.UIComponentBase.visitTree(UIComponentBase.java:1073)
>        at
> org.apache.myfaces.application.NavigationHandlerImpl.handleNavigation(NavigationHandlerImpl.java:181)
>        at
> org.apache.myfaces.trinidadinternal.application.NavigationHandlerImpl.handleNavigation(NavigationHandlerImpl.java:117)
>        at
> org.apache.myfaces.application.ActionListenerImpl.processAction(ActionListenerImpl.java:161)
>        at
> org.apache.myfaces.trinidad.component.UIXCommand.broadcast(UIXCommand.java:190)
>        at javax.faces.component.UIViewRoot._broadcastAll(UIViewRoot.java:1015)
>        at javax.faces.component.UIViewRoot.broadcastEvents(UIViewRoot.java:284)
>        at javax.faces.component.UIViewRoot._process(UIViewRoot.java:1309)
>        at javax.faces.component.UIViewRoot.processApplication(UIViewRoot.java:746)
>        at
> org.apache.myfaces.lifecycle.InvokeApplicationExecutor.execute(InvokeApplicationExecutor.java:38)
>        at
> org.apache.myfaces.lifecycle.LifecycleImpl.executePhase(LifecycleImpl.java:170)
>        at
> org.apache.myfaces.lifecycle.LifecycleImpl.execute(LifecycleImpl.java:117)
>        at javax.faces.webapp.FacesServlet.service(FacesServlet.java:197)
>        at
> weblogic.servlet.internal.StubSecurityHelper$ServletServiceAction.run(StubSecurityHelper.java:227)
>        at
> weblogic.servlet.internal.StubSecurityHelper.invokeServlet(StubSecurityHelper.java:125)
>        at
> weblogic.servlet.internal.ServletStubImpl.execute(ServletStubImpl.java:300)
>        at weblogic.servlet.internal.TailFilter.doFilter(TailFilter.java:26)
>        at
> weblogic.servlet.internal.FilterChainImpl.doFilter(FilterChainImpl.java:56)
>        at
> org.apache.myfaces.trinidadinternal.webapp.TrinidadFilterImpl._doFilterImpl(TrinidadFilterImpl.java:293)
>        at
> org.apache.myfaces.trinidadinternal.webapp.TrinidadFilterImpl.doFilter(TrinidadFilterImpl.java:199)
>        at
> org.apache.myfaces.trinidad.webapp.TrinidadFilter.doFilter(TrinidadFilter.java:92)
>        at
> weblogic.servlet.internal.FilterChainImpl.doFilter(FilterChainImpl.java:56)
>        at com.myapp.filter.LoginFilter.doFilter(LoginFilter.java:59)
>        at
> weblogic.servlet.internal.FilterChainImpl.doFilter(FilterChainImpl.java:56)
>        at oracle.security.jps.ee.http.JpsAbsFilter$1.run(JpsAbsFilter.java:111)
>        at java.security.AccessController.doPrivileged(Native Method)
>        at oracle.security.jps.util.JpsSubject.doAsPrivileged(JpsSubject.java:313)
>        at
> oracle.security.jps.ee.util.JpsPlatformUtil.runJaasMode(JpsPlatformUtil.java:413)
>        at
> oracle.security.jps.ee.http.JpsAbsFilter.runJaasMode(JpsAbsFilter.java:94)
>        at oracle.security.jps.ee.http.JpsAbsFilter.doFilter(JpsAbsFilter.java:161)
>        at oracle.security.jps.ee.http.JpsFilter.doFilter(JpsFilter.java:71)
>        at
> weblogic.servlet.internal.FilterChainImpl.doFilter(FilterChainImpl.java:56)
>        at oracle.dms.servlet.DMSServletFilter.doFilter(DMSServletFilter.java:136)
>        at
> weblogic.servlet.internal.FilterChainImpl.doFilter(FilterChainImpl.java:56)
>        at
> weblogic.servlet.internal.RequestEventsFilter.doFilter(RequestEventsFilter.java:27)
>        at
> weblogic.servlet.internal.FilterChainImpl.doFilter(FilterChainImpl.java:56)
>        at
> weblogic.servlet.internal.WebAppServletContext$ServletInvocationAction.wrapRun(WebAppServletContext.java:3715)
>        at
> weblogic.servlet.internal.WebAppServletContext$ServletInvocationAction.run(WebAppServletContext.java:3681)
>        at
> weblogic.security.acl.internal.AuthenticatedSubject.doAs(AuthenticatedSubject.java:321)
>        at
> weblogic.security.service.SecurityManager.runAs(SecurityManager.java:120)
>        at
> weblogic.servlet.internal.WebAppServletContext.securedExecute(WebAppServletContext.java:2277)
>        at
> weblogic.servlet.internal.WebAppServletContext.execute(WebAppServletContext.java:2183)
>        at
> weblogic.servlet.internal.ServletRequestImpl.run(ServletRequestImpl.java:1454)
>        at weblogic.work.ExecuteThread.execute(ExecuteThread.java:209)
>        at weblogic.work.ExecuteThread.run(ExecuteThread.java:178)
> --
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> Sent from the My Faces - Dev mailing list archive at Nabble.com.
>