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Date: Tue, 10 Apr 2012 09:45:18 +0000 (UTC)
From: "Gary Tully (Closed) (JIRA)" <jira@apache.org>
To: dev@activemq.apache.org
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Subject: [jira] [Closed] (AMQ-3684) Potential deadlock in vm transport
 setListener when sender is blocked pending space
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     [ https://issues.apache.org/jira/browse/AMQ-3684?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Gary Tully closed AMQ-3684.
---------------------------

    
> 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
>              Labels: vmtransport
>             Fix For: 5.6.0
>
>         Attachments: VMTransport.java
>
>
> 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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