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From "Robert Greig (JIRA)" <qpid-...@incubator.apache.org>
Subject [jira] Created: (QPID-607) Dispatcher threads do not die
Date Fri, 21 Sep 2007 20:16:51 GMT
Dispatcher threads do not die

                 Key: QPID-607
                 URL: https://issues.apache.org/jira/browse/QPID-607
             Project: Qpid
          Issue Type: Bug
          Components: Java Client
    Affects Versions: M2
         Environment: Any
            Reporter: Robert Greig
            Assignee: Robert Greig

During extensive testing we see many (e.g. hundreds) of threads running with the following

"Dispatcher-Channel-1" daemon prio=1 tid=0x00002aab004e6530 nid=0x5d24
waiting on condition [0x0000000052978000..0x0000000052978c00]
       at sun.misc.Unsafe.park(Native Method)
       at java.util.concurrent.locks.LockSupport.park(LockSupport.java:118)
       at java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.await(AbstractQueuedSynchronizer.java:1767)
       at java.util.concurrent.LinkedBlockingQueue.take(LinkedBlockingQueue.java:359)
       at org.apache.qpid.client.util.FlowControllingBlockingQueue.take(FlowControllingBlockingQueue.java:74)
       at org.apache.qpid.client.AMQSession$Dispatcher.run(AMQSession.java:2680)

This is because the dispatcher does a blocking take, rather than a poll with a timeout.

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