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https://issues.apache.org/jira/browse/QPID-8285?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16838712#comment-16838712
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ASF subversion and git services commented on QPID-8285:
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Commit d6335fd04ce38f5cfe796f15c177ece988ee2815 in qpid-jms-amqp-0-x's branch
refs/heads/master from Alex Rudyy
[ https://gitbox.apache.org/repos/asf?p=qpid-jms-amqp-0-x.git;h=d6335fd ]
QPID-8285: [JMS AMQP 0-x] Fix syncing of dispatch queue
> Deadlock during receiveMessage when broker connecton fails
> ----------------------------------------------------------
>
> Key: QPID-8285
> URL: https://issues.apache.org/jira/browse/QPID-8285
> Project: Qpid
> Issue Type: Bug
> Components: JMS AMQP 0-x
> Environment: * Java 1.8.0_20, 1.8.0_192, & 1.8.0_172
> * Linux 4.9.0-4-amd64 & 3.10.0-327.13
> * qpidd 1.39.0
> Reporter: Jonathan Beales
> Priority: Major
> Fix For: qpid-java-client-0-x-6.3.4
>
> Attachments: qpid_jms_deaklock.patch
>
>
> When a JMS MessageConsumer calls receiveMessage with a timeout, if no message
> is received during the timeout,
> BasicMessageConsumer_0_10.getMessageFromQueue() calls the syncDispatchQueue()
> method. As not the dispatcher thread, the consumer waits on a method local
> CountDownLatch which should be decremented when the AMQSession.Dispatcher
> thread calls dispatch().
> In the AMQSession.Dispatcher thread, the core loop will stop pulling from the
> queue to dispatch messages when the connection to the broker is lost
> (isClosing() becomes true).
> In this scenario, the receiveMessage call is waiting forever because the
> Dispatcher will never call dispatch. This also leaves the Dispatcher thread
> in an infinite loop (using 100% CPU) waiting to be fully closed.
> This can fixed by allowing the AMQSession.Dispatcher to always dispatch
> remaining queue content to ensure a consumer is not waiting forever (see
> attached).
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