[jbossts-issues] [JBoss JIRA] (JBTM-1951) Deadlock in JBOSS Transaction Reaper

[Tom Jenkinson (JIRA)]

    [ https://issues.jboss.org/browse/JBTM-1951?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12808677#comment-12808677 ] 

Tom Jenkinson commented on JBTM-1951:
-------------------------------------

Hi Peter,

Its difficult to say without more complete understanding of your issue. As Jesper says it is worth trying this on the latest code base from WildFly and checking if the issue still occurs.

I had a look at how a ManagedConnection::lock() could be acquired and not released by Timer-93 and couldn't spot a scenario on the latest IronJacamar 1.1.x tag (unless you are subclassing BaseWrapperManagedConnection somehow?)

I will close the issue as cannot reproduce for now, if you do find an issue using WildFly, please open up a discussion on the ironjacamar forums

Thanks,
Tom
                
> Deadlock in JBOSS Transaction Reaper
> ------------------------------------
>
>                 Key: JBTM-1951
>                 URL: https://issues.jboss.org/browse/JBTM-1951
>             Project: JBoss Transaction Manager
>          Issue Type: Bug
>      Security Level: Public(Everyone can see) 
>    Affects Versions: 4.16.2
>            Reporter: Peter Klauser
>            Assignee: Tom Jenkinson
>
> Found one Java-level deadlock:
> =============================
> "Timer-93":
> waiting to lock monitor 0x00007f8fac190cf8 (object 0x00000000d6d50830, a com.arjuna.ats.internal.jta.transaction.arjunacore.AtomicAction),
> which is held by "Transaction Reaper Worker 0"
> "Transaction Reaper Worker 0":
> waiting for ownable synchronizer 0x00000000d6861408, (a java.util.concurrent.locks.ReentrantLock$FairSync),
> which is held by "Timer-93" 
> Java stack information for the threads listed above:
> ===================================================
> "Timer-93":
> at com.arjuna.ats.arjuna.coordinator.BasicAction.Abort(BasicAction.java:1573)
> - waiting to lock <0x00000000d6d50830> (a com.arjuna.ats.internal.jta.transaction.arjunacore.AtomicAction)
> at com.arjuna.ats.arjuna.coordinator.TwoPhaseCoordinator.cancel(TwoPhaseCoordinator.java:118)
> at com.arjuna.ats.arjuna.AtomicAction.abort(AtomicAction.java:188)
> at com.arjuna.ats.internal.jta.transaction.arjunacore.TransactionImple.rollbackAndDisassociate(TransactionImple.java:1247)
> at com.arjuna.ats.internal.jta.transaction.arjunacore.BaseTransaction.rollback(BaseTransaction.java:134)
> at com.arjuna.ats.jbossatx.BaseTransactionManagerDelegate.rollback(BaseTransactionManagerDelegate.java:114)
> at org.jboss.as.ejb3.inflow.MessageEndpointInvocationHandler.afterDelivery(MessageEndpointInvocationHandler.java:70)
> at sun.reflect.GeneratedMethodAccessor1756.invoke(Unknown Source)
> at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
> at java.lang.reflect.Method.invoke(Unknown Source)
> at org.jboss.as.ejb3.inflow.AbstractInvocationHandler.handle(AbstractInvocationHandler.java:60)
> at org.jboss.as.ejb3.inflow.MessageEndpointInvocationHandler.doInvoke(MessageEndpointInvocationHandler.java:136)
> at org.jboss.as.ejb3.inflow.AbstractInvocationHandler.invoke(AbstractInvocationHandler.java:73)
> at com.sun.proxy.$Proxy852.afterDelivery(Unknown Source)
> at sunrise.ra.aq.inbound.AqServerSession.run(AqServerSession.java:141)
> at java.util.TimerThread.mainLoop(Unknown Source)
> at java.util.TimerThread.run(Unknown Source)
> "Transaction Reaper Worker 0":
> at sun.misc.Unsafe.park(Native Method)
> - parking to wait for <0x00000000d6861408> (a java.util.concurrent.locks.ReentrantLock$FairSync)
> at java.util.concurrent.locks.LockSupport.park(Unknown Source)
> at java.util.concurrent.locks.AbstractQueuedSynchronizer.parkAndCheckInterrupt(Unknown Source)
> at java.util.concurrent.locks.AbstractQueuedSynchronizer.acquireQueued(Unknown Source)
> at java.util.concurrent.locks.AbstractQueuedSynchronizer.acquire(Unknown Source)
> at java.util.concurrent.locks.ReentrantLock$FairSync.lock(Unknown Source)
> at java.util.concurrent.locks.ReentrantLock.lock(Unknown Source)
> at org.jboss.jca.adapters.jdbc.BaseWrapperManagedConnection.lock(BaseWrapperManagedConnection.java:361)
> at org.jboss.jca.adapters.jdbc.xa.XAManagedConnection.end(XAManagedConnection.java:290)
> at org.jboss.jca.core.tx.jbossts.XAResourceWrapperImpl.end(XAResourceWrapperImpl.java:99)
> at com.arjuna.ats.internal.jta.resources.arjunacore.XAResourceRecord.topLevelAbort(XAResourceRecord.java:312)
> at com.arjuna.ats.arjuna.coordinator.BasicAction.doAbort(BasicAction.java:2874)
> at com.arjuna.ats.arjuna.coordinator.BasicAction.doAbort(BasicAction.java:2853)
> at com.arjuna.ats.arjuna.coordinator.BasicAction.Abort(BasicAction.java:1616)
> - locked <0x00000000d6d50830> (a com.arjuna.ats.internal.jta.transaction.arjunacore.AtomicAction)
> at com.arjuna.ats.arjuna.coordinator.TwoPhaseCoordinator.cancel(TwoPhaseCoordinator.java:118)
> at com.arjuna.ats.arjuna.AtomicAction.cancel(AtomicAction.java:217)
> at com.arjuna.ats.arjuna.coordinator.TransactionReaper.doCancellations(TransactionReaper.java:370)
> at com.arjuna.ats.internal.arjuna.coordinator.ReaperWorkerThread.run(ReaperWorkerThread.java:78) 
> Found 1 deadlock.

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