Hi
The line number does not match with the latest code of ApplicationImpl. But
the code that throws the NullPointerException is this:
private static SystemEvent _traverseListenerList(List<? extends
SystemEventListener> listeners,
Class<? extends
SystemEvent> systemEventClass, Object source,
SystemEvent event)
{
if (listeners != null && !listeners.isEmpty())
{
// perf: org.apache.myfaces.application.ApplicationImpl.
//
SystemListenerEntry.getSpecificSourceListenersNotNull(Class<?>)
// or javax.faces.component.UIComponent.subscribeToEvent(
// Class<? extends SystemEvent>,
ComponentSystemEventListener)
// creates a ArrayList:
for (int i = 0, size = listeners.size(); i < size; i++)
{
SystemEventListener listener = listeners.get(i);
// Call
SystemEventListener.isListenerForSource(java.lang.Object), passing the
source argument.
// If this returns false, take no action on the listener.
if (listener.isListenerForSource(source))
{
// Otherwise, if the event to be passed to the listener
instances has not yet been constructed,
// construct the event, passing source as the argument
to the one-argument constructor that takes
// an Object. This same event instance must be passed
to all listener instances.
event = _createEvent(systemEventClass, source, event);
// Call
SystemEvent.isAppropriateListener(javax.faces.event.FacesListener), passing
the listener
// instance as the argument. If this returns false,
take no action on the listener.
if (event.isAppropriateListener(listener))
{
// Call
SystemEvent.processListener(javax.faces.event.FacesListener), passing the
listener
// instance.
event.processListener(listener);
}
}
}
}
return event;
}
There is only one choice: list of listeners has some null elements, which
is invalid. But maybe it could be solved just adding a null check:
if (listener != null &&
listener.isListenerForSource(source))
In theory it should not happen, the code in MyFaces is correct, but the
null check is harmless. Anyway, the question is why Trinidad returns a
listener list with null values?. It could be a bug into trinidad state
saving algorithm, but without a tests sounds very difficult to solve,
because only occur in a non frequent use case.
regards,
Leonardo Uribe
2012/7/4 jnthodge <jntho...@hotmail.com>:
>
> OK, we've upgraded to 2.1.7 as you suggested, and it has only changed the
> line number that throws this error in ApplicationImpl.java. Any thoughts?
>
> Thanks much!!
>
> java.lang.NullPointerException
> at
>
org.apache.myfaces.application.ApplicationImpl._traverseListenerList(ApplicationImpl.java:2355)
> at
>
org.apache.myfaces.application.ApplicationImpl.publishEvent(ApplicationImpl.java:574)
> at
>
org.apache.myfaces.application.ApplicationImpl.publishEvent(ApplicationImpl.java:604)
> at
>
org.apache.myfaces.application.NavigationHandlerImpl$PreDisposeViewCallback.visit(NavigationHandlerImpl.java:237)
> at
>
org.apache.myfaces.component.visit.FullVisitContext.invokeVisitCallback(FullVisitContext.java:141)
> at
>
org.apache.myfaces.trinidad.component.UIXComponent.visitTree(UIXComponent.java:539)
> at
>
org.apache.myfaces.trinidad.component.UIXComponent.visitTree(UIXComponent.java:362)
> at
>
org.apache.myfaces.trinidad.component.UIXComponent.visitAllChildren(UIXComponent.java:445)
> at
>
org.apache.myfaces.trinidad.component.UIXComponent.visitChildren(UIXComponent.java:423)
> at
>
org.apache.myfaces.trinidad.component.UIXComponent.visitChildren(UIXComponent.java:703)
> at
>
org.apache.myfaces.trinidad.component.UIXComponent.visitTree(UIXComponent.java:566)
> at
>
org.apache.myfaces.trinidad.component.UIXComponent.visitTree(UIXComponent.java:362)
> at
>
org.apache.myfaces.trinidad.component.UIXComponent.visitAllChildren(UIXComponent.java:445)
> at
>
org.apache.myfaces.trinidad.component.UIXComponent.visitChildren(UIXComponent.java:423)
> at
>
org.apache.myfaces.trinidad.component.UIXComponent.visitChildren(UIXComponent.java:703)
> at
>
org.apache.myfaces.trinidad.component.UIXComponent.visitTree(UIXComponent.java:566)
> at
>
org.apache.myfaces.trinidad.component.UIXComponent.visitTree(UIXComponent.java:362)
> at
>
org.apache.myfaces.trinidad.component.UIXShowOne.visitTree(UIXShowOne.java:135)
> at
javax.faces.component.UIComponent.visitTree(UIComponent.java:960)
> at
> javax.faces.component.UIComponentBase.visitTree(UIComponentBase.java:1159)
> at
>
org.apache.myfaces.trinidad.component.UIXComponent.visitAllChildren(UIXComponent.java:445)
> at
>
org.apache.myfaces.trinidad.component.UIXComponent.visitChildren(UIXComponent.java:423)
> at
>
org.apache.myfaces.trinidad.component.UIXComponent.visitChildren(UIXComponent.java:703)
> at
>
org.apache.myfaces.trinidad.component.UIXComponent.visitTree(UIXComponent.java:566)
> at
>
org.apache.myfaces.trinidad.component.UIXComponent.visitTree(UIXComponent.java:362)
> at
>
org.apache.myfaces.trinidad.component.UIXComponent.visitAllChildren(UIXComponent.java:445)
> at
>
org.apache.myfaces.trinidad.component.UIXComponent.visitChildren(UIXComponent.java:423)
> at
>
org.apache.myfaces.trinidad.component.UIXComponent.visitChildren(UIXComponent.java:703)
> at
>
org.apache.myfaces.trinidad.component.UIXComponent.visitTree(UIXComponent.java:566)
> at
>
org.apache.myfaces.trinidad.component.UIXComponent.visitTree(UIXComponent.java:362)
> at
javax.faces.component.UIComponent.visitTree(UIComponent.java:960)
> at
> javax.faces.component.UIComponentBase.visitTree(UIComponentBase.java:1159)
> at
>
org.apache.myfaces.application.NavigationHandlerImpl.handleNavigation(NavigationHandlerImpl.java:182)
> 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:1023)
> at
javax.faces.component.UIViewRoot.broadcastEvents(UIViewRoot.java:286)
> at javax.faces.component.UIViewRoot._process(UIViewRoot.java:1360)
> at
javax.faces.component.UIViewRoot.processApplication(UIViewRoot.java:752)
> 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
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)
> ...
> --
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