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From "Rainer Klute (JIRA)" <j...@apache.org>
Subject [jira] Created: (AMQ-1564) Deadlock between VMTransport threads accessing AMQStore
Date Wed, 23 Jan 2008 11:47:25 GMT
Deadlock between VMTransport threads accessing AMQStore
-------------------------------------------------------

                 Key: AMQ-1564
                 URL: https://issues.apache.org/activemq/browse/AMQ-1564
             Project: ActiveMQ
          Issue Type: Bug
          Components: Message Store
    Affects Versions: 5.1.0
         Environment: Linux
            Reporter: Rainer Klute
             Fix For: 5.1.0


A some time and quite a lot of ActiveMQ patches I dared to run my favorite Reliability JUnit
test (see AMQ-1490) on the current ActiveMQ snapshot (revision 614484). Unfortunately already
the first test case failed with a deadlock after processing so many messages.

Here are the stack traces of what ''jconsole'' considered the threads involved in the deadlock.
They obviously have to do with the AMQStore:

<pre>
Name: VMTransport
State: BLOCKED on org.apache.activemq.store.kahadaptor.KahaTopicReferenceStore@9f339e owned
by: VMTransport
Total blocked: 341  Total waited: 3.750

Stack trace: 
org.apache.activemq.store.kahadaptor.KahaTopicReferenceStore.acknowledgeReference(KahaTopicReferenceStore.java:127)
org.apache.activemq.store.amq.AMQTopicMessageStore.acknowledge(AMQTopicMessageStore.java:154)
org.apache.activemq.store.amq.AMQTopicMessageStore$1.afterCommit(AMQTopicMessageStore.java:113)
   - locked org.apache.activemq.store.amq.AMQTopicMessageStore@edf389
org.apache.activemq.transaction.Transaction.fireAfterCommit(Transaction.java:86)
org.apache.activemq.transaction.LocalTransaction.commit(LocalTransaction.java:68)
org.apache.activemq.broker.TransactionBroker.commitTransaction(TransactionBroker.java:170)
org.apache.activemq.broker.BrokerFilter.commitTransaction(BrokerFilter.java:93)
org.apache.activemq.broker.BrokerFilter.commitTransaction(BrokerFilter.java:93)
org.apache.activemq.broker.MutableBrokerFilter.commitTransaction(MutableBrokerFilter.java:103)
org.apache.activemq.broker.TransportConnection.processCommitTransactionOnePhase(TransportConnection.java:396)
org.apache.activemq.command.TransactionInfo.visit(TransactionInfo.java:100)
org.apache.activemq.broker.TransportConnection.service(TransportConnection.java:280)
org.apache.activemq.broker.TransportConnection$1.onCommand(TransportConnection.java:177)
org.apache.activemq.transport.ResponseCorrelator.onCommand(ResponseCorrelator.java:100)
org.apache.activemq.transport.TransportFilter.onCommand(TransportFilter.java:67)
org.apache.activemq.transport.vm.VMTransport.iterate(VMTransport.java:202)
org.apache.activemq.thread.PooledTaskRunner.runTask(PooledTaskRunner.java:118)
org.apache.activemq.thread.PooledTaskRunner$1.run(PooledTaskRunner.java:42)
java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:885)
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:907)
java.lang.Thread.run(Thread.java:619)
</pre>

And the second one:

<pre>
Name: VMTransport
State: BLOCKED on org.apache.activemq.store.amq.AMQTopicMessageStore@edf389 owned by: VMTransport
Total blocked: 294  Total waited: 5.570

Stack trace: 
org.apache.activemq.store.amq.AMQMessageStore.getLocation(AMQMessageStore.java:406)
org.apache.activemq.store.amq.AMQMessageStore.getMessage(AMQMessageStore.java:390)
org.apache.activemq.store.amq.RecoveryListenerAdapter.recoverMessageReference(RecoveryListenerAdapter.java:54)
org.apache.activemq.store.kahadaptor.KahaReferenceStore.recoverReference(KahaReferenceStore.java:70)
org.apache.activemq.store.kahadaptor.KahaTopicReferenceStore.recoverNextMessages(KahaTopicReferenceStore.java:258)
   - locked org.apache.activemq.store.kahadaptor.KahaTopicReferenceStore@9f339e
org.apache.activemq.store.amq.AMQTopicMessageStore.recoverNextMessages(AMQTopicMessageStore.java:64)
org.apache.activemq.broker.region.cursors.TopicStorePrefetch.fillBatch(TopicStorePrefetch.java:215)
   - locked org.apache.activemq.broker.region.cursors.TopicStorePrefetch@1f5f472
org.apache.activemq.broker.region.cursors.TopicStorePrefetch.safeFillBatch(TopicStorePrefetch.java:200)
   - locked org.apache.activemq.broker.region.cursors.TopicStorePrefetch@1f5f472
org.apache.activemq.broker.region.cursors.TopicStorePrefetch.isEmpty(TopicStorePrefetch.java:96)
   - locked org.apache.activemq.broker.region.cursors.TopicStorePrefetch@1f5f472
org.apache.activemq.broker.region.cursors.StoreDurableSubscriberCursor.getNextCursor(StoreDurableSubscriberCursor.java:307)
   - locked org.apache.activemq.broker.region.cursors.StoreDurableSubscriberCursor@839267
org.apache.activemq.broker.region.cursors.StoreDurableSubscriberCursor.hasNext(StoreDurableSubscriberCursor.java:190)
   - locked org.apache.activemq.broker.region.cursors.StoreDurableSubscriberCursor@839267
org.apache.activemq.broker.region.PrefetchSubscription.dispatchPending(PrefetchSubscription.java:481)
   - locked java.lang.Object@1ac539f
org.apache.activemq.broker.region.PrefetchSubscription.add(PrefetchSubscription.java:146)
org.apache.activemq.broker.region.DurableTopicSubscription.add(DurableTopicSubscription.java:178)
org.apache.activemq.broker.region.policy.SimpleDispatchPolicy.dispatch(SimpleDispatchPolicy.java:48)
org.apache.activemq.broker.region.Topic.dispatch(Topic.java:607)
org.apache.activemq.broker.region.Topic$4.afterCommit(Topic.java:424)
org.apache.activemq.transaction.Transaction.fireAfterCommit(Transaction.java:86)
org.apache.activemq.transaction.LocalTransaction.commit(LocalTransaction.java:68)
org.apache.activemq.broker.TransactionBroker.commitTransaction(TransactionBroker.java:170)
org.apache.activemq.broker.BrokerFilter.commitTransaction(BrokerFilter.java:93)
org.apache.activemq.broker.BrokerFilter.commitTransaction(BrokerFilter.java:93)
org.apache.activemq.broker.MutableBrokerFilter.commitTransaction(MutableBrokerFilter.java:103)
org.apache.activemq.broker.TransportConnection.processCommitTransactionOnePhase(TransportConnection.java:396)
org.apache.activemq.command.TransactionInfo.visit(TransactionInfo.java:100)
org.apache.activemq.broker.TransportConnection.service(TransportConnection.java:280)
org.apache.activemq.broker.TransportConnection$1.onCommand(TransportConnection.java:177)
org.apache.activemq.transport.ResponseCorrelator.onCommand(ResponseCorrelator.java:100)
org.apache.activemq.transport.TransportFilter.onCommand(TransportFilter.java:67)
org.apache.activemq.transport.vm.VMTransport.iterate(VMTransport.java:202)
org.apache.activemq.thread.PooledTaskRunner.runTask(PooledTaskRunner.java:118)
org.apache.activemq.thread.PooledTaskRunner$1.run(PooledTaskRunner.java:42)
java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:885)
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:907)
java.lang.Thread.run(Thread.java:619)
</pre>


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