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https://issues.apache.org/jira/browse/QPID-5117?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Pavel Moravec updated QPID-5117:
--------------------------------
Attachment: test_QPID5117.java
.. and I have (nondeterministic) reproducer.
java test_QPID5117 50
sometimes hungs in the deadlock (not printing out "Finishing.") with jstack:
2013-09-05 16:33:11
Full thread dump OpenJDK 64-Bit Server VM (20.0-b12 mixed mode):
"Attach Listener" daemon prio=10 tid=0x00007f3ca8001000 nid=0x799f waiting on
condition [0x0000000000000000]
java.lang.Thread.State: RUNNABLE
"Dispatcher-0-Conn-1" prio=10 tid=0x00007f3cd030d000 nid=0x798f waiting for
monitor entry [0x00007f3cca6e4000]
java.lang.Thread.State: BLOCKED (on object monitor)
at
org.apache.qpid.client.AMQConnection.createSession(AMQConnection.java:666)
- waiting to lock <0x00000000f2a90d30> (a java.lang.Object)
at
org.apache.qpid.client.AMQConnection.createSession(AMQConnection.java:658)
at
org.apache.qpid.client.AMQConnection.createSession(AMQConnection.java:652)
at
org.apache.qpid.client.AMQConnection.createSession(AMQConnection.java:84)
at test_QPID5117$1.onMessage(test_QPID5117.java:45)
at
org.apache.qpid.client.BasicMessageConsumer.notifyMessage(BasicMessageConsumer.java:744)
at
org.apache.qpid.client.BasicMessageConsumer_0_10.notifyMessage(BasicMessageConsumer_0_10.java:141)
at
org.apache.qpid.client.BasicMessageConsumer.notifyMessage(BasicMessageConsumer.java:718)
at
org.apache.qpid.client.BasicMessageConsumer_0_10.notifyMessage(BasicMessageConsumer_0_10.java:187)
at
org.apache.qpid.client.BasicMessageConsumer_0_10.notifyMessage(BasicMessageConsumer_0_10.java:53)
at
org.apache.qpid.client.AMQSession$Dispatcher.notifyConsumer(AMQSession.java:3362)
at
org.apache.qpid.client.AMQSession$Dispatcher.dispatchMessage(AMQSession.java:3301)
- locked <0x00000000f23c0580> (a java.lang.Object)
- locked <0x00000000f25147f8> (a java.lang.Object)
at
org.apache.qpid.client.AMQSession$Dispatcher.access$900(AMQSession.java:3088)
at org.apache.qpid.client.AMQSession.dispatch(AMQSession.java:3081)
at
org.apache.qpid.client.message.UnprocessedMessage.dispatch(UnprocessedMessage.java:54)
at
org.apache.qpid.client.AMQSession$Dispatcher.run(AMQSession.java:3224)
at java.lang.Thread.run(Thread.java:679)
"ack-flusher" daemon prio=10 tid=0x00007f3cd022e000 nid=0x798e in Object.wait()
[0x00007f3cca7e5000]
java.lang.Thread.State: TIMED_WAITING (on object monitor)
at java.lang.Object.wait(Native Method)
- waiting on <0x00000000f23514b0> (a java.util.TaskQueue)
at java.util.TimerThread.mainLoop(Timer.java:531)
- locked <0x00000000f23514b0> (a java.util.TaskQueue)
at java.util.TimerThread.run(Timer.java:484)
"IoReceiver - localhost/127.0.0.1:5672" daemon prio=10 tid=0x00007f3cd01f9000
nid=0x798d runnable [0x00007f3ccaaed000]
java.lang.Thread.State: RUNNABLE
at java.net.SocketInputStream.socketRead0(Native Method)
at java.net.SocketInputStream.read(SocketInputStream.java:146)
at
org.apache.qpid.transport.network.io.IoReceiver.run(IoReceiver.java:156)
at java.lang.Thread.run(Thread.java:679)
"IoSender - localhost/127.0.0.1:5672" daemon prio=10 tid=0x00007f3cd017c800
nid=0x798c in Object.wait() [0x00007f3ccabee000]
java.lang.Thread.State: WAITING (on object monitor)
at java.lang.Object.wait(Native Method)
- waiting on <0x00000000f2a90120> (a java.lang.Object)
at java.lang.Object.wait(Object.java:502)
at org.apache.qpid.transport.network.io.IoSender.run(IoSender.java:284)
- locked <0x00000000f2a90120> (a java.lang.Object)
at java.lang.Thread.run(Thread.java:679)
"Low Memory Detector" daemon prio=10 tid=0x00007f3cd00a0000 nid=0x7988 runnable
[0x0000000000000000]
java.lang.Thread.State: RUNNABLE
"C2 CompilerThread1" daemon prio=10 tid=0x00007f3cd009e000 nid=0x7987 waiting
on condition [0x0000000000000000]
java.lang.Thread.State: RUNNABLE
"C2 CompilerThread0" daemon prio=10 tid=0x00007f3cd0098800 nid=0x7986 waiting
on condition [0x0000000000000000]
java.lang.Thread.State: RUNNABLE
"Signal Dispatcher" daemon prio=10 tid=0x00007f3cd008a800 nid=0x7985 runnable
[0x0000000000000000]
java.lang.Thread.State: RUNNABLE
"Finalizer" daemon prio=10 tid=0x00007f3cd0078000 nid=0x7984 in Object.wait()
[0x00007f3ccb5d7000]
java.lang.Thread.State: WAITING (on object monitor)
at java.lang.Object.wait(Native Method)
- waiting on <0x00000000f2a903b0> (a java.lang.ref.ReferenceQueue$Lock)
at java.lang.ref.ReferenceQueue.remove(ReferenceQueue.java:133)
- locked <0x00000000f2a903b0> (a java.lang.ref.ReferenceQueue$Lock)
at java.lang.ref.ReferenceQueue.remove(ReferenceQueue.java:149)
at java.lang.ref.Finalizer$FinalizerThread.run(Finalizer.java:189)
"Reference Handler" daemon prio=10 tid=0x00007f3cd0076000 nid=0x7983 in
Object.wait() [0x00007f3ccb6d8000]
java.lang.Thread.State: WAITING (on object monitor)
at java.lang.Object.wait(Native Method)
- waiting on <0x00000000f2aa0290> (a java.lang.ref.Reference$Lock)
at java.lang.Object.wait(Object.java:502)
at java.lang.ref.Reference$ReferenceHandler.run(Reference.java:133)
- locked <0x00000000f2aa0290> (a java.lang.ref.Reference$Lock)
"main" prio=10 tid=0x00007f3cd0008000 nid=0x797d waiting for monitor entry
[0x00007f3cd4dd9000]
java.lang.Thread.State: BLOCKED (on object monitor)
at org.apache.qpid.client.AMQConnection.doClose(AMQConnection.java:879)
- waiting to lock <0x00000000f23c0580> (a java.lang.Object)
- locked <0x00000000f2a90d30> (a java.lang.Object)
at org.apache.qpid.client.AMQConnection.close(AMQConnection.java:863)
at org.apache.qpid.client.AMQConnection.close(AMQConnection.java:854)
at org.apache.qpid.client.AMQConnection.close(AMQConnection.java:849)
at test_QPID5117.<init>(test_QPID5117.java:78)
at test_QPID5117.main(test_QPID5117.java:26)
"VM Thread" prio=10 tid=0x00007f3cd0071800 nid=0x7982 runnable
"GC task thread#0 (ParallelGC)" prio=10 tid=0x00007f3cd0012800 nid=0x797e
runnable
"GC task thread#1 (ParallelGC)" prio=10 tid=0x00007f3cd0014800 nid=0x797f
runnable
"GC task thread#2 (ParallelGC)" prio=10 tid=0x00007f3cd0016800 nid=0x7980
runnable
"GC task thread#3 (ParallelGC)" prio=10 tid=0x00007f3cd0018000 nid=0x7981
runnable
"VM Periodic Task Thread" prio=10 tid=0x00007f3cd00a2800 nid=0x7989 waiting on
condition
JNI global references: 1618
Found one Java-level deadlock:
=============================
"Dispatcher-0-Conn-1":
waiting to lock monitor 0x00007f3c800047a8 (object 0x00000000f2a90d30, a
java.lang.Object),
which is held by "main"
"main":
waiting to lock monitor 0x00007f3c80006338 (object 0x00000000f23c0580, a
java.lang.Object),
which is held by "Dispatcher-0-Conn-1"
Java stack information for the threads listed above:
===================================================
"Dispatcher-0-Conn-1":
at
org.apache.qpid.client.AMQConnection.createSession(AMQConnection.java:666)
- waiting to lock <0x00000000f2a90d30> (a java.lang.Object)
at
org.apache.qpid.client.AMQConnection.createSession(AMQConnection.java:658)
at
org.apache.qpid.client.AMQConnection.createSession(AMQConnection.java:652)
at
org.apache.qpid.client.AMQConnection.createSession(AMQConnection.java:84)
at test_QPID5117$1.onMessage(test_QPID5117.java:45)
at
org.apache.qpid.client.BasicMessageConsumer.notifyMessage(BasicMessageConsumer.java:744)
at
org.apache.qpid.client.BasicMessageConsumer_0_10.notifyMessage(BasicMessageConsumer_0_10.java:141)
at
org.apache.qpid.client.BasicMessageConsumer.notifyMessage(BasicMessageConsumer.java:718)
at
org.apache.qpid.client.BasicMessageConsumer_0_10.notifyMessage(BasicMessageConsumer_0_10.java:187)
at
org.apache.qpid.client.BasicMessageConsumer_0_10.notifyMessage(BasicMessageConsumer_0_10.java:53)
at
org.apache.qpid.client.AMQSession$Dispatcher.notifyConsumer(AMQSession.java:3362)
at
org.apache.qpid.client.AMQSession$Dispatcher.dispatchMessage(AMQSession.java:3301)
- locked <0x00000000f23c0580> (a java.lang.Object)
- locked <0x00000000f25147f8> (a java.lang.Object)
at
org.apache.qpid.client.AMQSession$Dispatcher.access$900(AMQSession.java:3088)
at org.apache.qpid.client.AMQSession.dispatch(AMQSession.java:3081)
at
org.apache.qpid.client.message.UnprocessedMessage.dispatch(UnprocessedMessage.java:54)
at
org.apache.qpid.client.AMQSession$Dispatcher.run(AMQSession.java:3224)
at java.lang.Thread.run(Thread.java:679)
"main":
at org.apache.qpid.client.AMQConnection.doClose(AMQConnection.java:879)
- waiting to lock <0x00000000f23c0580> (a java.lang.Object)
- locked <0x00000000f2a90d30> (a java.lang.Object)
at org.apache.qpid.client.AMQConnection.close(AMQConnection.java:863)
at org.apache.qpid.client.AMQConnection.close(AMQConnection.java:854)
at org.apache.qpid.client.AMQConnection.close(AMQConnection.java:849)
at test_QPID5117.<init>(test_QPID5117.java:78)
at test_QPID5117.main(test_QPID5117.java:26)
Found 1 deadlock.
> Java client deadlocks if connection is closed while onMessage() is creating a
> session
> -------------------------------------------------------------------------------------
>
> Key: QPID-5117
> URL: https://issues.apache.org/jira/browse/QPID-5117
> Project: Qpid
> Issue Type: Bug
> Components: Java Client
> Affects Versions: 0.22
> Reporter: Philip Harvey
> Attachments: jcarder_result_2.dot, test_QPID5117.java
>
>
> I have run the java systests with the [JCarder|http://jcarder.org/] agent
> attached. JCarder detected a potential deadlock when the following are done
> concurrently:
> * Application thread closes a connection
> * A MessageListener creates a new session on that connection inside
> onMessage().
> Here is a sketch of the wrongly-ordered locking:
> {noformat}
> Thread "main"
> AMQConnection.close()
> AMQConnection.doClose()
> lock AMQConnection._sessionCreationLock
> lock AMQSession.getMessageDeliveryLock()
> Thread "Dispatcher-1-Conn-780"
> AMQSession$Dispatcher.dispatchMessage()
> lock AMQSession.this._messageDeliveryLock
> myMessageListener.onMessage()
> AMQConnection.createSession()
> lock AMQConnection._sessionCreationLock
> {noformat}
> I've attached JCarder's GraphViz-format .dot file which represents this
> slightly more comprehensively.
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