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https://issues.apache.org/activemq/browse/AMQ-1467?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Rob Davies resolved AMQ-1467.
-----------------------------
Resolution: Fixed
Fix Version/s: 5.0.0
Fixed by svn revision 585967
> Deadlock between FilePendingMessageCursor and MemoryUsage
> ---------------------------------------------------------
>
> Key: AMQ-1467
> URL: https://issues.apache.org/activemq/browse/AMQ-1467
> Project: ActiveMQ
> Issue Type: Bug
> Components: Broker
> Reporter: Nicky Sandhu
> Assignee: Rob Davies
> Priority: Critical
> Fix For: 5.0.0
>
> Attachments: patch-usage-fireevent.txt
>
>
> Deadlock detected by jconsole. Fairly easy to reproduce with a
> maven-perf-test-plugin using journaled jdbc persistence. Using the latest
> 5.0-SNAPSHOT build
> ActiveMQ Task
> Name: ActiveMQ Task
> State: BLOCKED on [EMAIL PROTECTED] owned by: ActiveMQ Transport:
> tcp:///167.235.7.27:4215
> Total blocked: 1,001 Total waited: 1,002
> Stack trace:
> org.apache.activemq.usage.MemoryUsage.increaseUsage(MemoryUsage.java:126)
> org.apache.activemq.usage.MemoryUsage.increaseUsage(MemoryUsage.java:122)
> org.apache.activemq.command.Message.incrementReferenceCount(Message.java:585)
> org.apache.activemq.broker.region.cursors.FilePendingMessageCursor.next(FilePendingMessageCursor.java:198)
> - locked [EMAIL PROTECTED]
> org.apache.activemq.broker.region.cursors.StoreQueueCursor.next(StoreQueueCursor.java:129)
> - locked [EMAIL PROTECTED]
> org.apache.activemq.broker.region.Queue.buildList(Queue.java:1020)
> - locked [EMAIL PROTECTED]
> - locked [EMAIL PROTECTED]
> org.apache.activemq.broker.region.Queue.doPageIn(Queue.java:1002)
> org.apache.activemq.broker.region.Queue.pageInMessages(Queue.java:1065)
> org.apache.activemq.broker.region.Queue.iterate(Queue.java:938)
> 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)
> ActiveMQ Transport: tcp://....:xxxx
> Name: ActiveMQ Transport: tcp:///167.235.7.27:4215
> State: BLOCKED on [EMAIL PROTECTED] owned by: ActiveMQ Task
> Total blocked: 46 Total waited: 2
> Stack trace:
> org.apache.activemq.broker.region.cursors.FilePendingMessageCursor.onUsageChanged(FilePendingMessageCursor.java:260)
> org.apache.activemq.usage.Usage.fireEvent(Usage.java:254)
> org.apache.activemq.usage.Usage.setPercentUsage(Usage.java:224)
> - locked [EMAIL PROTECTED]
> org.apache.activemq.usage.MemoryUsage.decreaseUsage(MemoryUsage.java:149)
> org.apache.activemq.usage.MemoryUsage.decreaseUsage(MemoryUsage.java:142)
> org.apache.activemq.command.Message.decrementReferenceCount(Message.java:601)
> - locked [EMAIL PROTECTED]
> org.apache.activemq.broker.region.IndirectMessageReference.drop(IndirectMessageReference.java:137)
> - locked [EMAIL PROTECTED]
> org.apache.activemq.broker.region.QueueSubscription.acknowledge(QueueSubscription.java:56)
> org.apache.activemq.broker.region.PrefetchSubscription.acknowledge(PrefetchSubscription.java:193)
> - locked [EMAIL PROTECTED]
> org.apache.activemq.broker.region.AbstractRegion.acknowledge(AbstractRegion.java:340)
> org.apache.activemq.broker.region.RegionBroker.acknowledge(RegionBroker.java:427)
> org.apache.activemq.broker.TransactionBroker.acknowledge(TransactionBroker.java:194)
> org.apache.activemq.broker.BrokerFilter.acknowledge(BrokerFilter.java:73)
> org.apache.activemq.broker.BrokerFilter.acknowledge(BrokerFilter.java:73)
> org.apache.activemq.broker.MutableBrokerFilter.acknowledge(MutableBrokerFilter.java:87)
> org.apache.activemq.broker.TransportConnection.processMessageAck(TransportConnection.java:478)
> org.apache.activemq.command.MessageAck.visit(MessageAck.java:196)
> org.apache.activemq.broker.TransportConnection.service(TransportConnection.java:319)
> org.apache.activemq.broker.TransportConnection$1.onCommand(TransportConnection.java:216)
> org.apache.activemq.transport.TransportFilter.onCommand(TransportFilter.java:67)
> org.apache.activemq.transport.WireFormatNegotiator.onCommand(WireFormatNegotiator.java:134)
> org.apache.activemq.transport.InactivityMonitor.onCommand(InactivityMonitor.java:124)
> - locked [EMAIL PROTECTED]
> org.apache.activemq.transport.TransportSupport.doConsume(TransportSupport.java:83)
> org.apache.activemq.transport.tcp.TcpTransport.doRun(TcpTransport.java:183)
> org.apache.activemq.transport.tcp.TcpTransport.run(TcpTransport.java:170)
> java.lang.Thread.run(Thread.java:619)
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