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From "Lorenz Quack (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (QPID-6672) Message dispatching after dispatcher close can cause thread to terminate with IllegalStateException
Date Fri, 14 Aug 2015 15:57:45 GMT

     [ https://issues.apache.org/jira/browse/QPID-6672?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel

Lorenz Quack updated QPID-6672:
    Attachment: 0001-QPID-6672-Java-Client-Message-dispatching-after-disp_v3.patch

This patch is a little bit more intrusive.
It removes the messageDeliveryLock.
On the upside the should resolve the issue of this JIRA without an RuntimeException being
thrown because of lock contention (it can still be thrown if a dispatch takes a long time,
but that is what the timeout is there for).
On the downside it is hard to reason about whether this introduce any new locking issues or
race conditions (due to the messageDeliveryLock being gone).
Please thoroughly review.

> 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
>            Priority: Minor
>         Attachments: 0001-QPID-6672-Java-Client-Message-dispatching-after-disp.patch,
0001-QPID-6672-Java-Client-Message-dispatching-after-disp_v2.patch, 0001-QPID-6672-Java-Client-Message-dispatching-after-disp_v3.patch,
> 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 (the fixme goes back to 2007) 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)
> 	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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