| Summary: | NullPointerException at org.apache.catalina.core.StandardContext.listenerStop | ||
|---|---|---|---|
| Product: | Tomcat 7 | Reporter: | Graham Leggett <minfrin> |
| Component: | Catalina | Assignee: | Tomcat Developers Mailing List <dev> |
| Status: | RESOLVED FIXED | ||
| Severity: | normal | ||
| Priority: | P2 | ||
| Version: | 7.0.59 | ||
| Target Milestone: | --- | ||
| Hardware: | PC | ||
| OS: | Mac OS X 10.1 | ||
Hi, Fix is provided in trunk, 8.0.x for 8.0.21 and 7.0.x for 7.0.60 onwards. Regards, Violeta |
During shutdown, tomcat crashes as follows: SEVERE: Exception sending context destroyed event to listener instance of class org.apache.tomcat.websocket.server.WsContextListener java.lang.NullPointerException at org.apache.catalina.core.StandardContext.listenerStop(StandardContext.java:5076) at org.apache.catalina.core.StandardContext.stopInternal(StandardContext.java:5719) at org.apache.catalina.util.LifecycleBase.stop(LifecycleBase.java:232) at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:160) at org.apache.catalina.core.ContainerBase.addChildInternal(ContainerBase.java:901) at org.apache.catalina.core.ContainerBase.addChild(ContainerBase.java:877) at org.apache.catalina.core.StandardHost.addChild(StandardHost.java:649) at org.apache.catalina.startup.HostConfig.deployDescriptor(HostConfig.java:672) at org.apache.catalina.startup.HostConfig$DeployDescriptor.run(HostConfig.java:1859) at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:471) at java.util.concurrent.FutureTask.run(FutureTask.java:262) at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145) An analysis of the code shows that getInstanceManager() is being called, and an assumption is made that this call will always return not-null, which is not the case. The rest of the code shows that there are valid situations where this returns null. 5075 try { 5076 getInstanceManager().destroyInstance(listeners[j]); 5077 } catch (Throwable t) { 5078 t = ExceptionUtils.unwrapInvocationTargetException(t); 5079 ExceptionUtils.handleThrowable(t); 5080 getLogger().error 5081 (sm.getString("standardContext.listenerStop", 5082 listeners[j].getClass().getName()), t); 5083 ok = false; 5084 } The fix should be a simple null check on or around line 5076.