[ https://issues.apache.org/jira/browse/AMQ-4297?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Gary Tully updated AMQ-4297:
----------------------------

          Component/s: stomp
          Description: 
{code}Found one Java-level deadlock:
=============================
"ActiveMQ Transport: ssl://27.0.0.1:63934":
  waiting for ownable synchronizer 7f40f40b0, (a java.util.concurrent.locks.ReentrantLock$NonfairSync),
  which is held by "ActiveMQ BrokerService[localhost] Task-2"
"ActiveMQ BrokerService[localhost] Task-2":
  waiting to lock monitor 7f90ca08ea30 (object 7f35b97b0, a org.apache.activemq.transport.stomp.StompSubscription),
  which is held by "ActiveMQ Transport: ssl://27.0.0.1:63934"

Java stack information for the threads listed above:
===================================================
"ActiveMQ Transport: ssl://27.0.0.1:63934":
	at sun.misc.Unsafe.park(Native Method)
	- parking to wait for  <7f40f40b0> (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.onCommand(MutexTransport.java:43)
	at org.apache.activemq.transport.AbstractInactivityMonitor.onCommand(AbstractInactivityMonitor.java:288)
	at org.apache.activemq.transport.stomp.StompTransportFilter.sendToActiveMQ(StompTransportFilter.java:84)
	at org.apache.activemq.transport.stomp.StompSubscription.onStompCommit(StompSubscription.java:122)
	- locked <7f35b97b0> (a org.apache.activemq.transport.stomp.StompSubscription)
	at org.apache.activemq.transport.stomp.ProtocolConverter.onStompCommit(ProtocolConverter.java:502)
	at org.apache.activemq.transport.stomp.ProtocolConverter.onStompCommand(ProtocolConverter.java:241)
	at org.apache.activemq.transport.stomp.StompTransportFilter.onCommand(StompTransportFilter.java:73)
	at org.apache.activemq.transport.TransportSupport.doConsume(TransportSupport.java:83)
	at org.apache.activemq.transport.tcp.SslTransport.doConsume(SslTransport.java:91)
	at org.apache.activemq.transport.stomp.StompSslTransportFactory$1$1.doConsume(StompSslTransportFactory.java:70)
	at org.apache.activemq.transport.tcp.TcpTransport.doRun(TcpTransport.java:214)
	at org.apache.activemq.transport.tcp.TcpTransport.run(TcpTransport.java:196)
	at java.lang.Thread.run(Thread.java:680)
"ActiveMQ BrokerService[localhost] Task-2":
	at org.apache.activemq.transport.stomp.StompSubscription.onMessageDispatch(StompSubscription.java:70)
	- waiting to lock <7f35b97b0> (a org.apache.activemq.transport.stomp.StompSubscription)
	at org.apache.activemq.transport.stomp.ProtocolConverter.onActiveMQCommand(ProtocolConverter.java:857)
	at org.apache.activemq.transport.stomp.StompTransportFilter.oneway(StompTransportFilter.java:61)
	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.MutexTransport.oneway(MutexTransport.java:68)
	at org.apache.activemq.broker.TransportConnection.dispatch(TransportConnection.java:1378)
	at org.apache.activemq.broker.TransportConnection.processDispatch(TransportConnection.java:897)
	at org.apache.activemq.broker.TransportConnection.iterate(TransportConnection.java:943)
	at org.apache.activemq.thread.PooledTaskRunner.runTask(PooledTaskRunner.java:129)
	at org.apache.activemq.thread.PooledTaskRunner$1.run(PooledTaskRunner.java:47)
	at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908)
	at java.lang.Thread.run(Thread.java:680)

Found 1 deadlock.
{code}
from org.apache.activemq.transport.stomp.StompTest#testPrefetchSize
           Regression: Unit Test Broken
    Affects Version/s: 5.8.0
        Fix Version/s: 5.8.0
             Assignee: Gary Tully
              Summary: stomp deadlock on commit  (was: sto'mp deadlock on commit)
    
> stomp deadlock on commit
> ------------------------
>
>                 Key: AMQ-4297
>                 URL: https://issues.apache.org/jira/browse/AMQ-4297
>             Project: ActiveMQ
>          Issue Type: Bug
>          Components: stomp
>    Affects Versions: 5.8.0
>            Reporter: Gary Tully
>            Assignee: Gary Tully
>             Fix For: 5.8.0
>
>
> {code}Found one Java-level deadlock:
> =============================
> "ActiveMQ Transport: ssl://27.0.0.1:63934":
>   waiting for ownable synchronizer 7f40f40b0, (a java.util.concurrent.locks.ReentrantLock$NonfairSync),
>   which is held by "ActiveMQ BrokerService[localhost] Task-2"
> "ActiveMQ BrokerService[localhost] Task-2":
>   waiting to lock monitor 7f90ca08ea30 (object 7f35b97b0, a org.apache.activemq.transport.stomp.StompSubscription),
>   which is held by "ActiveMQ Transport: ssl://27.0.0.1:63934"
> Java stack information for the threads listed above:
> ===================================================
> "ActiveMQ Transport: ssl://27.0.0.1:63934":
> 	at sun.misc.Unsafe.park(Native Method)
> 	- parking to wait for  <7f40f40b0> (a java.util.concurrent.locks.ReentrantLock$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.onCommand(MutexTransport.java:43)
> 	at org.apache.activemq.transport.AbstractInactivityMonitor.onCommand(AbstractInactivityMonitor.java:288)
> 	at org.apache.activemq.transport.stomp.StompTransportFilter.sendToActiveMQ(StompTransportFilter.java:84)
> 	at org.apache.activemq.transport.stomp.StompSubscription.onStompCommit(StompSubscription.java:122)
> 	- locked <7f35b97b0> (a org.apache.activemq.transport.stomp.StompSubscription)
> 	at org.apache.activemq.transport.stomp.ProtocolConverter.onStompCommit(ProtocolConverter.java:502)
> 	at org.apache.activemq.transport.stomp.ProtocolConverter.onStompCommand(ProtocolConverter.java:241)
> 	at org.apache.activemq.transport.stomp.StompTransportFilter.onCommand(StompTransportFilter.java:73)
> 	at org.apache.activemq.transport.TransportSupport.doConsume(TransportSupport.java:83)
> 	at org.apache.activemq.transport.tcp.SslTransport.doConsume(SslTransport.java:91)
> 	at org.apache.activemq.transport.stomp.StompSslTransportFactory$1$1.doConsume(StompSslTransportFactory.java:70)
> 	at org.apache.activemq.transport.tcp.TcpTransport.doRun(TcpTransport.java:214)
> 	at org.apache.activemq.transport.tcp.TcpTransport.run(TcpTransport.java:196)
> 	at java.lang.Thread.run(Thread.java:680)
> "ActiveMQ BrokerService[localhost] Task-2":
> 	at org.apache.activemq.transport.stomp.StompSubscription.onMessageDispatch(StompSubscription.java:70)
> 	- waiting to lock <7f35b97b0> (a org.apache.activemq.transport.stomp.StompSubscription)
> 	at org.apache.activemq.transport.stomp.ProtocolConverter.onActiveMQCommand(ProtocolConverter.java:857)
> 	at org.apache.activemq.transport.stomp.StompTransportFilter.oneway(StompTransportFilter.java:61)
> 	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.MutexTransport.oneway(MutexTransport.java:68)
> 	at org.apache.activemq.broker.TransportConnection.dispatch(TransportConnection.java:1378)
> 	at org.apache.activemq.broker.TransportConnection.processDispatch(TransportConnection.java:897)
> 	at org.apache.activemq.broker.TransportConnection.iterate(TransportConnection.java:943)
> 	at org.apache.activemq.thread.PooledTaskRunner.runTask(PooledTaskRunner.java:129)
> 	at org.apache.activemq.thread.PooledTaskRunner$1.run(PooledTaskRunner.java:47)
> 	at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886)
> 	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908)
> 	at java.lang.Thread.run(Thread.java:680)
> Found 1 deadlock.
> {code}
> from org.apache.activemq.transport.stomp.StompTest#testPrefetchSize

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