Hi Howard, I am not original poster, but according to his email it was (Tapestry 5.2.6).
Cezary On Wed, 26 Jun 2013 08:43:54 -0700 Howard Lewis Ship <hls...@gmail.com > wrote: > > What version of Tapestry? Necessary to figure out what line Form.java:406 > actually is. > > > On Mon, Jun 24, 2013 at 11:42 PM, Christian Köberl < > tapestry.christian.koeb...@gmail.com> wrote: > >> We have a quite strange behavior on IBM Websphere 8 / IBM Java 6 - we >> get a NullPointerException in Form.java:406 (Tapestry 5.2.6). >> Here's the corresponding line from Form.java:406: >> resources.triggerEvent(EventConstants.PREPARE_FOR_RENDER, context, null); >> >> The NPE first is raised after some parallel users are working with the >> application - before that everything works fine. After the first >> occurrence, the NPE is raised on *any* Form render on *any* page for >> *all* users. We have to restart the application to get it working >> again. We can reproduce the error with some load but the first NPE >> happens on different pages - so that's no clue. >> >> Happily we found this during our tests on WAS8 (not in production) - >> we were migrating from WAS6 (the same version of the application runs >> fine on WAS6). >> >> Has anybody an idea what's happening here? >> >> Thx, >> Chris >> >> Hers is the full stack trace for one page (looks the same for all pages): >> >> org.apache.tapestry5.internal.services.RenderQueueException: Render >> queue error in BeginRender[organization/user/List:form]: >> org.apache.tapestry5.ioc.internal.util.TapestryException [at >> [...] >> org.apache.tapestry5.internal.services.RenderQueueImpl.run(RenderQueueImpl.java:72) >> ... 118 more >> Caused by: >> java.lang.NullPointerException >> at >> org.apache.tapestry5.corelib.components.Form.beginRender(Form.java:406) >> at >> org.apache.tapestry5.corelib.components.Form$MethodAccess_beginRender_13f76df5156.invoke(Form$MethodAccess_beginRender_13f76df5156.java) >> at >> org.apache.tapestry5.internal.transform.RenderPhaseMethodWorker$Invoker.invoke(RenderPhaseMethodWorker.java:117) >> at >> org.apache.tapestry5.internal.transform.RenderPhaseMethodWorker$RenderPhaseMethodAdvice.advise(RenderPhaseMethodWorker.java:86) >> at >> org.apache.tapestry5.internal.services.AbstractComponentMethodInvocation.proceed(AbstractComponentMethodInvocation.java:86) >> at >> org.apache.tapestry5.corelib.components.Form.beginRender(Form.java) >> at >> org.apache.tapestry5.internal.structure.ComponentPageElementImpl$BeginRenderPhase.invokeComponent(ComponentPageElementImpl.java:239) >> at >> org.apache.tapestry5.internal.structure.ComponentPageElementImpl$AbstractPhase.invoke(ComponentPageElementImpl.java:186) >> ... 120 more >> >> --------------------------------------------------------------------- >> To unsubscribe, e-mail: users-unsubscr...@tapestry.apache.org >> For additional commands, e-mail: users-h...@tapestry.apache.org >> >> > >
