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https://issues.apache.org/jira/browse/AMQ-3684?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
Gary Tully reopened AMQ-3684:
-----------------------------
hmm, another variant of this, seems like enqueueValve needs to allow release
when enqueue is blocked, but that requires knowledge of the blocking queue.
Another case of blocked threads due to a blocked put.
{code}"ActiveMQ Task-3" daemon prio=5 tid=101a43800 nid=0x10c1c7000 in
Object.wait() [10c1c6000]
java.lang.Thread.State: WAITING (on object monitor)
at java.lang.Object.wait(Native Method)
at java.lang.Object.wait(Object.java:485)
at org.apache.activemq.thread.Valve.turnOff(Valve.java:71)
- locked <7dbf3c140> (a java.lang.Object)
at
org.apache.activemq.transport.vm.VMTransport.start(VMTransport.java:131)
at
org.apache.activemq.transport.TransportFilter.start(TransportFilter.java:58)
at
org.apache.activemq.transport.TransportFilter.start(TransportFilter.java:58)
at
org.apache.activemq.broker.TransportConnection.start(TransportConnection.java:895)
- locked <7dbea0258> (a org.apache.activemq.broker.TransportConnection)
at
org.apache.activemq.broker.TransportConnector$1$1.run(TransportConnector.java:217)
at
java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886)
at
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908)
at java.lang.Thread.run(Thread.java:680)
"ActiveMQ Task-4" daemon prio=5 tid=101a19800 nid=0x10c4d0000 in Object.wait()
[10c4cf000]
java.lang.Thread.State: WAITING (on object monitor)
at java.lang.Object.wait(Native Method)
- waiting on <7dbf3c140> (a java.lang.Object)
at java.lang.Object.wait(Object.java:485)
at org.apache.activemq.thread.Valve.increment(Valve.java:97)
- locked <7dbf3c140> (a java.lang.Object)
at
org.apache.activemq.transport.vm.VMTransport.iterate(VMTransport.java:196)
at
org.apache.activemq.thread.PooledTaskRunner.runTask(PooledTaskRunner.java:122)
at
org.apache.activemq.thread.PooledTaskRunner$1.run(PooledTaskRunner.java:43)
at
java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886)
at
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908)
at java.lang.Thread.run(Thread.java:680)
{code}
> 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
>
>
> 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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