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From "Gary Tully (Created) (JIRA)" <j...@apache.org>
Subject [jira] [Created] (AMQ-3684) Potential deadlock in vm transport setListener when sender is blocked pending space
Date Fri, 27 Jan 2012 11:32:40 GMT
Potential deadlock in vm transport setListener when sender is blocked pending space
-----------------------------------------------------------------------------------

                 Key: AMQ-3684
                 URL: https://issues.apache.org/jira/browse/AMQ-3684
             Project: ActiveMQ
          Issue Type: Bug
          Components: Transport
    Affects Versions: 5.5.1
            Reporter: Gary Tully
            Assignee: Gary Tully
             Fix For: 5.6.0


Noticed an intermittent dead lock in test:
{code}
"ActiveMQ Task-1" daemon prio=5 tid=101953000 nid=0x10abf3000 in Object.wait() [10abf2000]
   java.lang.Thread.State: WAITING (on object monitor)
	at java.lang.Object.wait(Native Method)
	- waiting on <7ddcdb9a0> (a java.lang.Object)
	at java.lang.Object.wait(Object.java:485)
	at org.apache.activemq.thread.Valve.turnOff(Valve.java:71)
	- locked <7ddcdb9a0> (a java.lang.Object)
	at org.apache.activemq.transport.vm.VMTransport.setTransportListener(VMTransport.java:230)
	at org.apache.activemq.transport.TransportFilter.setTransportListener(TransportFilter.java:42)
	at org.apache.activemq.transport.TransportFilter.setTransportListener(TransportFilter.java:42)
	at org.apache.activemq.broker.TransportConnection.<init>(TransportConnection.java:140)
	at org.apache.activemq.broker.TransportConnector.createConnection(TransportConnector.java:302)
	at org.apache.activemq.broker.TransportConnector$1$1.run(TransportConnector.java:218)
	at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908)
	at java.lang.Thread.run(Thread.java:680)
"RMI RenewClean-[192.168.1.9:57412]" daemon prio=5 tid=10193d800 nid=0x10a7e7000 in Object.wait()
[10a7e6000]
   java.lang.Thread.State: TIMED_WAITING (on object monitor)
	at java.lang.Object.wait(Native Method)
	- waiting on <7dd894fe0> (a java.lang.ref.ReferenceQueue$Lock)
	at java.lang.ref.ReferenceQueue.remove(ReferenceQueue.java:118)
	- locked <7dd894fe0> (a java.lang.ref.ReferenceQueue$Lock)
	at sun.rmi.transport.DGCClient$EndpointEntry$RenewCleanThread.run(DGCClient.java:516)
	at java.lang.Thread.run(Thread.java:680)
"main" prio=5 tid=101807000 nid=0x100501000 waiting on condition [1004fe000]
   java.lang.Thread.State: WAITING (parking)
	at sun.misc.Unsafe.park(Native Method)
	- parking to wait for  <7ddcdbc98> (a java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject)
	at java.util.concurrent.locks.LockSupport.park(LockSupport.java:158)
	at java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.await(AbstractQueuedSynchronizer.java:1987)
	at java.util.concurrent.LinkedBlockingQueue.put(LinkedBlockingQueue.java:306)
	at org.apache.activemq.transport.vm.VMTransport.oneway(VMTransport.java:100)
	at org.apache.activemq.transport.MutexTransport.oneway(MutexTransport.java:68)
	at org.apache.activemq.transport.ResponseCorrelator.oneway(ResponseCorrelator.java:60)
	at org.apache.activemq.broker.StubConnection.send(StubConnection.java:107)
	at org.apache.activemq.store.kahadb.KahaDBStoreRecoveryBrokerTest.testLargeQueuePersistentMessagesNotLostOnRestart(KahaDBStoreRecoveryBrokerTest.java:118)
...{code}

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