[jboss-jira] [JBoss JIRA] (DROOLS-883) Deadlock with kcontainer.updateToVersion() under load

[Mario Fusco (JIRA)]

     [ https://issues.jboss.org/browse/DROOLS-883?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Mario Fusco resolved DROOLS-883.
--------------------------------
    Resolution: Done


Fixed by https://github.com/droolsjbpm/drools/commit/5954c887b

> Deadlock with kcontainer.updateToVersion() under load
> -----------------------------------------------------
>
>                 Key: DROOLS-883
>                 URL: https://issues.jboss.org/browse/DROOLS-883
>             Project: Drools
>          Issue Type: Bug
>          Components: core engine
>         Environment: Tested with master after DROOLS-881 is fixed
>            Reporter: Toshiya Kobayashi
>            Assignee: Mario Fusco
>             Fix For: 6.3.0.CR2
>
>         Attachments: deadlock.txt, deadlockWithUpdateToVersion.zip
>
>
> Calling kcontainer.updateToVersion() under load causes a deadlock. See attached reproducer and thread dump.
> {noformat}
> Found one Java-level deadlock:
> =============================
> "pool-8-thread-11":
>   waiting for ownable synchronizer 0x00000007bd812568, (a java.util.concurrent.locks.ReentrantLock$NonfairSync),
>   which is held by "pool-8-thread-4"
> "pool-8-thread-4":
>   waiting for ownable synchronizer 0x000000070a08e9f8, (a java.util.concurrent.locks.ReentrantReadWriteLock$NonfairSync),
>   which is held by "pool-8-thread-1"
> "pool-8-thread-1":
>   waiting for ownable synchronizer 0x00000007bd812568, (a java.util.concurrent.locks.ReentrantLock$NonfairSync),
>   which is held by "pool-8-thread-4"
> Java stack information for the threads listed above:
> ===================================================
> "pool-8-thread-11":
> 	at sun.misc.Unsafe.park(Native Method)
> 	- parking to wait for  <0x00000007bd812568> (a java.util.concurrent.locks.ReentrantLock$NonfairSync)
> 	at java.util.concurrent.locks.LockSupport.park(LockSupport.java:186)
> 	at java.util.concurrent.locks.AbstractQueuedSynchronizer.parkAndCheckInterrupt(AbstractQueuedSynchronizer.java:834)
> 	at java.util.concurrent.locks.AbstractQueuedSynchronizer.acquireQueued(AbstractQueuedSynchronizer.java:867)
> 	at java.util.concurrent.locks.AbstractQueuedSynchronizer.acquire(AbstractQueuedSynchronizer.java:1197)
> 	at java.util.concurrent.locks.ReentrantLock$NonfairSync.lock(ReentrantLock.java:214)
> 	at java.util.concurrent.locks.ReentrantLock.lock(ReentrantLock.java:290)
> 	at org.drools.core.common.NamedEntryPoint.insert(NamedEntryPoint.java:190)
> 	at org.drools.core.impl.StatefulKnowledgeSessionImpl.insert(StatefulKnowledgeSessionImpl.java:1477)
> 	at org.drools.core.impl.StatefulKnowledgeSessionImpl.insert(StatefulKnowledgeSessionImpl.java:1432)
> 	at com.sample.CallKjarTest$2.run(CallKjarTest.java:66)
> 	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
> 	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
> 	at java.lang.Thread.run(Thread.java:745)
> "pool-8-thread-4":
> 	at sun.misc.Unsafe.park(Native Method)
> 	- parking to wait for  <0x000000070a08e9f8> (a java.util.concurrent.locks.ReentrantReadWriteLock$NonfairSync)
> 	at java.util.concurrent.locks.LockSupport.park(LockSupport.java:186)
> 	at java.util.concurrent.locks.AbstractQueuedSynchronizer.parkAndCheckInterrupt(AbstractQueuedSynchronizer.java:834)
> 	at java.util.concurrent.locks.AbstractQueuedSynchronizer.doAcquireShared(AbstractQueuedSynchronizer.java:964)
> 	at java.util.concurrent.locks.AbstractQueuedSynchronizer.acquireShared(AbstractQueuedSynchronizer.java:1282)
> 	at java.util.concurrent.locks.ReentrantReadWriteLock$ReadLock.lock(ReentrantReadWriteLock.java:731)
> 	at org.drools.core.impl.KnowledgeBaseImpl.readLock(KnowledgeBaseImpl.java:700)
> 	at org.drools.core.common.NamedEntryPoint.insert(NamedEntryPoint.java:191)
> 	at org.drools.core.impl.StatefulKnowledgeSessionImpl.insert(StatefulKnowledgeSessionImpl.java:1477)
> 	at org.drools.core.impl.StatefulKnowledgeSessionImpl.insert(StatefulKnowledgeSessionImpl.java:1432)
> 	at com.sample.CallKjarTest$2.run(CallKjarTest.java:66)
> 	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
> 	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
> 	at java.lang.Thread.run(Thread.java:745)
> "pool-8-thread-1":
> 	at sun.misc.Unsafe.park(Native Method)
> 	- parking to wait for  <0x00000007bd812568> (a java.util.concurrent.locks.ReentrantLock$NonfairSync)
> 	at java.util.concurrent.locks.LockSupport.park(LockSupport.java:186)
> 	at java.util.concurrent.locks.AbstractQueuedSynchronizer.parkAndCheckInterrupt(AbstractQueuedSynchronizer.java:834)
> 	at java.util.concurrent.locks.AbstractQueuedSynchronizer.acquireQueued(AbstractQueuedSynchronizer.java:867)
> 	at java.util.concurrent.locks.AbstractQueuedSynchronizer.acquire(AbstractQueuedSynchronizer.java:1197)
> 	at java.util.concurrent.locks.ReentrantLock$NonfairSync.lock(ReentrantLock.java:214)
> 	at java.util.concurrent.locks.ReentrantLock.lock(ReentrantLock.java:290)
> 	at org.drools.core.common.NamedEntryPoint.delete(NamedEntryPoint.java:481)
> 	at org.drools.core.common.NamedEntryPoint.delete(NamedEntryPoint.java:468)
>         at org.drools.core.impl.StatefulKnowledgeSessionImpl$WorkingMemoryReteExpireAction.execute(StatefulKnowledgeSessionImpl.java:1779)
>         at org.drools.core.phreak.SynchronizedPropagationList.flush(SynchronizedPropagationList.java:96)
>         at org.drools.core.phreak.SynchronizedPropagationList.flush(SynchronizedPropagationList.java:69)
>         at org.drools.core.impl.StatefulKnowledgeSessionImpl.flushPropagations(StatefulKnowledgeSessionImpl.java:2007)
>         at org.drools.core.phreak.AddRemoveRule.removeRule(AddRemoveRule.java:153)
>         at org.drools.core.reteoo.ReteooBuilder.removeTerminalNode(ReteooBuilder.java:161)
>         at org.drools.core.reteoo.ReteooBuilder.removeRule(ReteooBuilder.java:155)
>         - locked <0x00000007bd7cbfd8> (a org.drools.core.reteoo.ReteooBuilder)
>         at org.drools.core.impl.KnowledgeBaseImpl.removeRule(KnowledgeBaseImpl.java:1608)
>         at org.drools.core.impl.KnowledgeBaseImpl.removeRule(KnowledgeBaseImpl.java:1599)
>         at org.drools.compiler.builder.impl.KnowledgeBuilderImpl.preProcessRules(KnowledgeBuilderImpl.java:1141)
>         at org.drools.compiler.builder.impl.KnowledgeBuilderImpl.compileRules(KnowledgeBuilderImpl.java:1084)
>         at org.drools.compiler.builder.impl.KnowledgeBuilderImpl.compileAllRules(KnowledgeBuilderImpl.java:967)
>         at org.drools.compiler.builder.impl.CompositeKnowledgeBuilderImpl.buildRules(CompositeKnowledgeBuilderImpl.java:256)
>         at org.drools.compiler.builder.impl.CompositeKnowledgeBuilderImpl.buildPackages(CompositeKnowledgeBuilderImpl.java:120)
>         at org.drools.compiler.builder.impl.CompositeKnowledgeBuilderImpl.build(CompositeKnowledgeBuilderImpl.java:104)
>         at org.drools.compiler.kie.builder.impl.KieContainerImpl.rebuildAll(KieContainerImpl.java:369)
>         at org.drools.compiler.kie.builder.impl.KieContainerImpl.update(KieContainerImpl.java:207)
>         at org.drools.compiler.kie.builder.impl.KieContainerImpl.updateToVersion(KieContainerImpl.java:128)
>         at com.sample.CallKjarTest$1.run(CallKjarTest.java:45)
>         at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
>         at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
>         at java.lang.Thread.run(Thread.java:745)
> Found 1 deadlock.
> {noformat}



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