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From "Keith Wall (JIRA)" <j...@apache.org>
Subject [jira] [Created] (QPID-6672) Message dispatching after dispatcher close can cause thread to terminate with IllegalStateException
Date Fri, 31 Jul 2015 11:36:04 GMT
Keith Wall created QPID-6672:
--------------------------------

             Summary: Message dispatching after dispatcher close can cause thread to terminate
with IllegalStateException
                 Key: QPID-6672
                 URL: https://issues.apache.org/jira/browse/QPID-6672
             Project: Qpid
          Issue Type: Bug
          Components: Java Client
            Reporter: Keith Wall


There is a race between the dispatcher thread and another thread closing a session.  In the
unlucky case, the dispatcher thread can die with an ISE as below.

The issue appears to be that the Dispatcher#close method does not await the shutdown for the
dispatcher before returning, so the Dispatcher may run on for another iteration whilst the
dispatcher reference has been nulled.

This appears to be a longstanding issue and is showing up now owing to r1693225, which makes
uncaught exceptions fail the test.

{noformat}
2015-07-29 18:16:37,498         ERROR [Dispatcher-4-Conn-32] o.a.q.t.LoggingUncaughtExceptionHandler
Uncaught exception in thread "Dispatcher-4-Conn-32"
java.lang.IllegalStateException: dispatcher is not started
	at org.apache.qpid.client.AMQSession.dispatch(AMQSession.java:3267) ~[qpid-client-6.0.0-SNAPSHOT.jar:na]
	at org.apache.qpid.client.message.UnprocessedMessage.dispatch(UnprocessedMessage.java:54)
~[qpid-client-6.0.0-SNAPSHOT.jar:na]
	at org.apache.qpid.client.AMQSession$Dispatcher.run(AMQSession.java:3408) ~[qpid-client-6.0.0-SNAPSHOT.jar:na]
	at java.lang.Thread.run(Thread.java:745) ~[na:1.7.0_67]

{noformat}





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