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From "Timothy Bish (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (AMQ-4361) Deadlock during close while publishing to flow-controlled queue
Date Thu, 07 Mar 2013 15:18:12 GMT

    [ https://issues.apache.org/jira/browse/AMQ-4361?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13595957#comment-13595957
] 

Timothy Bish commented on AMQ-4361:
-----------------------------------

Create a test case and propose a patch to the issue, we can review it and see if it makes
sense / doesn't break anything.  Sounds like something that would be a benefit.  
                
> Deadlock during close while publishing to flow-controlled queue
> ---------------------------------------------------------------
>
>                 Key: AMQ-4361
>                 URL: https://issues.apache.org/jira/browse/AMQ-4361
>             Project: ActiveMQ
>          Issue Type: Bug
>          Components: JMS client
>    Affects Versions: 5.6.0, 5.8.0
>         Environment: Windows, Linux, JDK 1.6
>            Reporter: Sam hendley
>
> TestCase on github: 
> https://github.com/samhendley/activemq-close-deadlock-bug
> The deadlock occurs when we are using TcpTransport to a flow-controlled queue and we
then try to gracefully shutdown the application. The close operation hangs forever because
it is trying to send a "close packet" to the server. It never gets the chance to send that
request because the socket is blocked by the publishing thread. This stops my publisher from
shutting down and causes us to orphan threads during shutdown.
> I have verified this bug occurs on atleast activemq 5.6.0 and 5.8.0 and on linux and
windows using JDK 1.6.
> I don't need a fix for the bug necessarily, just a way to gracefully shutdown my publisher
if I get into this state.
> Partial Stack Trace During failure
> "ClosingThread" prio=6 tid=0x045ce000 nid=0xa84 waiting on condition [0x04ddf000]
>    java.lang.Thread.State: WAITING (parking)
>     at sun.misc.Unsafe.park(Native Method)
>     - parking to wait for  <0x23fc52d8> (a java.util.concurrent.locks.ReentrantLock$NonfairSync)
>     at java.util.concurrent.locks.LockSupport.park(LockSupport.java:156)
>     at java.util.concurrent.locks.AbstractQueuedSynchronizer.parkAndCheckInterrupt(AbstractQueuedSynchronizer.java:811)
>     at java.util.concurrent.locks.AbstractQueuedSynchronizer.acquireQueued(AbstractQueuedSynchronizer.java:842)
>     at java.util.concurrent.locks.AbstractQueuedSynchronizer.acquire(AbstractQueuedSynchronizer.java:1178)
>     at java.util.concurrent.locks.ReentrantLock$NonfairSync.lock(ReentrantLock.java:186)
>     at java.util.concurrent.locks.ReentrantLock.lock(ReentrantLock.java:262)
>     at org.apache.activemq.transport.MutexTransport.oneway(MutexTransport.java:66)
>     at org.apache.activemq.transport.ResponseCorrelator.oneway(ResponseCorrelator.java:60)
>     at org.apache.activemq.ActiveMQConnection.doAsyncSendPacket(ActiveMQConnection.java:1304)
>     at org.apache.activemq.ActiveMQConnection.asyncSendPacket(ActiveMQConnection.java:1298)
>     at org.apache.activemq.ActiveMQSession.asyncSendPacket(ActiveMQSession.java:1901)
>     at org.apache.activemq.ActiveMQMessageProducer.close(ActiveMQMessageProducer.java:173)
>     at org.activemq.bug.DeadlockDuringCloseTest$2.run(DeadlockDuringCloseTest.java:83)
>     at java.lang.Thread.run(Thread.java:662)
> "PublishingThread" prio=6 tid=0x045cd800 nid=0xb84 runnable [0x04d8f000]
>    java.lang.Thread.State: RUNNABLE
>     at java.net.SocketOutputStream.socketWrite0(Native Method)
>     at java.net.SocketOutputStream.socketWrite(SocketOutputStream.java:92)
>     at java.net.SocketOutputStream.write(SocketOutputStream.java:136)
>     at org.apache.activemq.transport.tcp.TcpBufferedOutputStream.flush(TcpBufferedOutputStream.java:115)
>     at java.io.DataOutputStream.flush(DataOutputStream.java:106)
>     at org.apache.activemq.transport.tcp.TcpTransport.oneway(TcpTransport.java:176)
>     at org.apache.activemq.transport.AbstractInactivityMonitor.doOnewaySend(AbstractInactivityMonitor.java:322)
>     at org.apache.activemq.transport.AbstractInactivityMonitor.oneway(AbstractInactivityMonitor.java:304)
>     at org.apache.activemq.transport.TransportFilter.oneway(TransportFilter.java:85)
>     at org.apache.activemq.transport.WireFormatNegotiator.oneway(WireFormatNegotiator.java:104)
>     at org.apache.activemq.transport.MutexTransport.oneway(MutexTransport.java:68)
>     at org.apache.activemq.transport.ResponseCorrelator.oneway(ResponseCorrelator.java:60)
>     at org.apache.activemq.ActiveMQConnection.doAsyncSendPacket(ActiveMQConnection.java:1304)
>     at org.apache.activemq.ActiveMQConnection.asyncSendPacket(ActiveMQConnection.java:1298)
>     at org.apache.activemq.ActiveMQSession.send(ActiveMQSession.java:1782)
>     - locked <0x23faa7d8> (a java.lang.Object)
>     at org.apache.activemq.ActiveMQMessageProducer.send(ActiveMQMessageProducer.java:289)
>     at org.apache.activemq.ActiveMQMessageProducer.send(ActiveMQMessageProducer.java:224)
>     at org.apache.activemq.ActiveMQMessageProducerSupport.send(ActiveMQMessageProducerSupport.java:300)
>     at org.activemq.bug.DeadlockDuringCloseTest$1.run(DeadlockDuringCloseTest.java:63)
>     at java.lang.Thread.run(Thread.java:662)

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