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https://issues.apache.org/jira/browse/WICKET-4965?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
Emond Papegaaij resolved WICKET-4965.
-------------------------------------
Resolution: Fixed
Fix Version/s: 6.5.0
Resources are no longer unregistered during shutdown now, preventing the NPE
(which also occurs on Jetty by the way).
> NPE when stopping Tomcat
> ------------------------
>
> Key: WICKET-4965
> URL: https://issues.apache.org/jira/browse/WICKET-4965
> Project: Wicket
> Issue Type: Bug
> Components: wicket-atmosphere
> Environment: Atmosphere 1.0.5, wicket-atmosphere 0.5
> Reporter: Andrei Badea
> Assignee: Emond Papegaaij
> Fix For: 6.5.0
>
>
> {noformat}
> java.lang.NullPointerException: null
> at org.apache.wicket.atmosphere.EventBus.get(EventBus.java:86)
> at
> org.apache.wicket.atmosphere.AtmosphereBehavior.findEventBus(AtmosphereBehavior.java:85)
> at
> org.apache.wicket.atmosphere.AtmosphereBehavior.onDisconnect(AtmosphereBehavior.java:182)
> at
> org.atmosphere.cpr.AtmosphereResourceImpl.onDisconnect(AtmosphereResourceImpl.java:809)
> at
> org.atmosphere.cpr.AtmosphereResourceImpl.notifyListeners(AtmosphereResourceImpl.java:754)
> at
> org.atmosphere.cpr.AtmosphereResourceImpl.resume(AtmosphereResourceImpl.java:327)
> at
> org.atmosphere.cpr.DefaultBroadcaster.resumeAll(DefaultBroadcaster.java:315)
> at
> org.atmosphere.cpr.DefaultBroadcasterFactory.destroy(DefaultBroadcasterFactory.java:307)
> at
> org.atmosphere.cpr.AtmosphereFramework.destroy(AtmosphereFramework.java:930)
> at
> org.atmosphere.cpr.AtmosphereServlet.destroy(AtmosphereServlet.java:186)
> at
> org.apache.catalina.core.StandardWrapper.unload(StandardWrapper.java:1465)
> at
> org.apache.catalina.core.StandardWrapper.stopInternal(StandardWrapper.java:1823)
> at org.apache.catalina.util.LifecycleBase.stop(LifecycleBase.java:232)
> at
> org.apache.catalina.core.StandardContext.stopInternal(StandardContext.java:5463)
> at org.apache.catalina.util.LifecycleBase.stop(LifecycleBase.java:232)
> at
> org.apache.catalina.core.ContainerBase$StopChild.call(ContainerBase.java:1575)
> at
> org.apache.catalina.core.ContainerBase$StopChild.call(ContainerBase.java:1564)
> at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:303)
> at java.util.concurrent.FutureTask.run(FutureTask.java:138)
> at
> java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886)
> at
> java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908)
> at java.lang.Thread.run(Thread.java:662)
> {noformat}
> The NPE occurs because the Wicket application has already been destroyed. It
> it destroyed by the Wicket filter's destroy() method, which is invoked by
> ReflectorServletProcessor.destroy(). AtmosphereFramework.destroy() first
> destroys the handler, and then it destroys the broadcast factory (which
> resumes the resources).
> Jean-Francois says the bug is not in Atmosphere:
> https://github.com/Atmosphere/atmosphere/issues/812
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