https://bz.apache.org/bugzilla/show_bug.cgi?id=58373

            Bug ID: 58373
           Summary: Data race on field
                    org.apache.catalina.core.StandardContext.applicationEv
                    entListenersObjects
           Product: Tomcat 8
           Version: trunk
          Hardware: PC
                OS: Linux
            Status: NEW
          Severity: normal
          Priority: P2
         Component: Catalina
          Assignee: [email protected]
          Reporter: [email protected]

Reported by RV-Predict (a dynamic race detector) when running the test suite:
Data race on field
org.apache.catalina.core.StandardContext.applicationEventListenersObjects: {{{
    Concurrent read in thread T204 (locks held: {Monitor@424a8381})
 ---->  at
org.apache.catalina.core.StandardContext.getApplicationEventListeners(StandardContext.java:1155)
        at
org.apache.catalina.core.StandardContext.fireRequestDestroyEvent(StandardContext.java:5920)
        at
org.apache.catalina.connector.CoyoteAdapter.asyncDispatch(CoyoteAdapter.java:282)
        at
org.apache.coyote.http11.AbstractHttp11Processor.asyncDispatch(AbstractHttp11Processor.java:1709)
        at
org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:651)
        at
org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:277)
        - locked Monitor@424a8381 at
org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:259)
 
        at
org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
    T204 is created by T202
        at
java.util.concurrent.ThreadPoolExecutor.addWorker(ThreadPoolExecutor.java:1010)

    Concurrent write in thread T200 (locks held: {Monitor@42766493})
 ---->  at
org.apache.catalina.core.StandardContext.setApplicationEventListeners(StandardContext.java:1161)
        at
org.apache.catalina.core.StandardContext.listenerStop(StandardContext.java:4825)
        at
org.apache.catalina.core.StandardContext.stopInternal(StandardContext.java:5390)
        at org.apache.catalina.util.LifecycleBase.stop(LifecycleBase.java:232)
        - locked Monitor@42766493 at
org.apache.catalina.util.LifecycleBase.stop(LifecycleBase.java:n/a) 
        at
org.apache.catalina.core.ContainerBase$StopChild.call(ContainerBase.java:1424)
    T200 is created by T199
        at
java.util.concurrent.ThreadPoolExecutor.addWorker(ThreadPoolExecutor.java:1010)
}}}

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