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https://issues.apache.org/jira/browse/QPID-2430?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Robbie Gemmell updated QPID-2430:
---------------------------------
Summary: Java broker emits NPE following qpid-tool being connected (was:
Java broker emits NPE a period following qpid-tool being connected)
> Java broker emits NPE following qpid-tool being connected
> ---------------------------------------------------------
>
> Key: QPID-2430
> URL: https://issues.apache.org/jira/browse/QPID-2430
> Project: Qpid
> Issue Type: Bug
> Components: Java Broker, Java Management : QMF
> Affects Versions: 0.7
> Reporter: Robbie Gemmell
> Fix For: 0.7
>
>
> Whilst qpid-tool is connected to the Java broker, after a period of time the
> broker is seen to emit a NullPointerException. This was typically seen
> quickyl before the management update period was increased to 10 seconds, now
> it occurs after a longer period, suggesting the root cause is dependant on
> the number of messages sent. Thus far, the same code location has generated
> the NPE when called from slightly different contexts in the following 3
> threads:
> Exception in thread "TimerThread-test:" java.lang.NullPointerException
> Exception in thread "pool-1-thread-X" java.lang.NullPointerException
> Exception in thread
> "subflushrunner-org.apache.qpid.server.subscription.subscription_0...@1d4d493"
> java.lang.NullPointerException
> Up to date stack (r918944):
> Exception in thread "TimerThread-test:" java.lang.NullPointerException
> at
> org.apache.qpid.server.txn.AutoCommitTransaction.dequeue(AutoCommitTransaction.java:55)
> at
> org.apache.qpid.server.subscription.Subscription_0_10.forceDequeue(Subscription_0_10.java:577)
> at
> org.apache.qpid.server.subscription.Subscription_0_10.send(Subscription_0_10.java:564)
> at
> org.apache.qpid.server.queue.SimpleAMQQueue.deliverMessage(SimpleAMQQueue.java:696)
> at
> org.apache.qpid.server.queue.SimpleAMQQueue.deliverToSubscription(SimpleAMQQueue.java:641)
> at
> org.apache.qpid.server.queue.SimpleAMQQueue.enqueue(SimpleAMQQueue.java:594)
> at
> org.apache.qpid.server.queue.SimpleAMQQueue.enqueue(SimpleAMQQueue.java:519)
> at
> org.apache.qpid.qmf.ManagementExchange.publishToConsole(ManagementExchange.java:364)
> at
> org.apache.qpid.qmf.ManagementExchange.publishObjectsToConsole(ManagementExchange.java:343)
> at
> org.apache.qpid.qmf.ManagementExchange.publishAllConsole(ManagementExchange.java:316)
> at
> org.apache.qpid.qmf.ManagementExchange$UpdateTask.run(ManagementExchange.java:497)
> at java.util.TimerThread.mainLoop(Timer.java:512)
> at java.util.TimerThread.run(Timer.java:462)
> Older stacks (some line numbers have changed slightly since):
> Exception in thread
> "subflushrunner-org.apache.qpid.server.subscription.subscription_0...@1d4d493"
> java.lang.NullPointerException
> at
> org.apache.qpid.server.txn.AutoCommitTransaction.dequeue(AutoCommitTransaction.java:55)
> at
> org.apache.qpid.server.subscription.Subscription_0_10.forceDequeue(Subscription_0_10.java:576)
> at
> org.apache.qpid.server.subscription.Subscription_0_10.send(Subscription_0_10.java:563)
> at
> org.apache.qpid.server.queue.SimpleAMQQueue.deliverMessage(SimpleAMQQueue.java:674)
> at
> org.apache.qpid.server.queue.SimpleAMQQueue.attemptDelivery(SimpleAMQQueue.java:1646)
> at
> org.apache.qpid.server.queue.SimpleAMQQueue.flushSubscription(SimpleAMQQueue.java:1585)
> at
> org.apache.qpid.server.queue.SubFlushRunner.run(SubFlushRunner.java:56)
> at
> java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886)
> at
> java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908)
> at java.lang.Thread.run(Thread.java:619)
> Exception in thread
> "subflushrunner-org.apache.qpid.server.subscription.subscription_0...@1d4d493"
> java.lang.NullPointerException
> at
> org.apache.qpid.server.txn.AutoCommitTransaction.dequeue(AutoCommitTransaction.java:55)
> at
> org.apache.qpid.server.subscription.Subscription_0_10.forceDequeue(Subscription_0_10.java:576)
> at
> org.apache.qpid.server.subscription.Subscription_0_10.send(Subscription_0_10.java:563)
> at
> org.apache.qpid.server.queue.SimpleAMQQueue.deliverMessage(SimpleAMQQueue.java:674)
> at
> org.apache.qpid.server.queue.SimpleAMQQueue.attemptDelivery(SimpleAMQQueue.java:1646)
> at
> org.apache.qpid.server.queue.SimpleAMQQueue.flushSubscription(SimpleAMQQueue.java:1585)
> at
> org.apache.qpid.server.queue.SubFlushRunner.run(SubFlushRunner.java:56)
> at
> java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886)
> at
> java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908)
> at java.lang.Thread.run(Thread.java:619)
> Exception in thread "pool-1-thread-15" java.lang.NullPointerException
> at
> org.apache.qpid.server.txn.AutoCommitTransaction.dequeue(AutoCommitTransaction.java:55)
> at
> org.apache.qpid.server.subscription.Subscription_0_10.forceDequeue(Subscription_0_10.java:576)
> at
> org.apache.qpid.server.subscription.Subscription_0_10.send(Subscription_0_10.java:563)
> at
> org.apache.qpid.server.queue.SimpleAMQQueue.deliverMessage(SimpleAMQQueue.java:674)
> at
> org.apache.qpid.server.queue.SimpleAMQQueue.attemptDelivery(SimpleAMQQueue.java:1646)
> at
> org.apache.qpid.server.queue.SimpleAMQQueue.processQueue(SimpleAMQQueue.java:1765)
> at
> org.apache.qpid.server.queue.SimpleAMQQueue.access$100(SimpleAMQQueue.java:70)
> at
> org.apache.qpid.server.queue.SimpleAMQQueue$Runner.run(SimpleAMQQueue.java:1542)
> 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:619)
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