[jboss-jira] [JBoss JIRA] (JBRULES-3502) Deadlock trying to do concurrent insertions on the same KnowledgeSession

[Mario Fusco (JIRA)]

     [ https://issues.jboss.org/browse/JBRULES-3502?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Mario Fusco resolved JBRULES-3502.
----------------------------------

    Fix Version/s: 5.4.0.Final
       Resolution: Done

    
> Deadlock trying to do concurrent insertions on the same KnowledgeSession
> ------------------------------------------------------------------------
>
>                 Key: JBRULES-3502
>                 URL: https://issues.jboss.org/browse/JBRULES-3502
>             Project: Drools
>          Issue Type: Bug
>      Security Level: Public(Everyone can see) 
>            Reporter: Mario Fusco
>            Assignee: Mario Fusco
>             Fix For: 5.4.0.Final
>
>
> Concurrent insertions on the same KnowledgeSession ends up in a deadlock with 2 threads waiting each other as it follows:
> Thread-1 at 1667 daemon, prio=5, in group 'main', status: 'WAIT'
> 	  at sun.misc.Unsafe.park(Unsafe.java:-1)
> 	  at java.util.concurrent.locks.LockSupport.park(LockSupport.java:156)
> 	  at java.util.concurrent.locks.AbstractQueuedSynchronizer.parkAndCheckInterrupt(AbstractQueuedSynchronizer.java:811)
> 	  at java.util.concurrent.locks.AbstractQueuedSynchronizer.acquireQueued(AbstractQueuedSynchronizer.java:842)
> 	  at java.util.concurrent.locks.AbstractQueuedSynchronizer.acquire(AbstractQueuedSynchronizer.java:1178)
> 	  at java.util.concurrent.locks.ReentrantLock$NonfairSync.lock(ReentrantLock.java:186)
> 	  at java.util.concurrent.locks.ReentrantLock.lock(ReentrantLock.java:262)
> 	  at org.drools.common.NamedEntryPoint.insert(NamedEntryPoint.java:172)
> 	  at org.drools.common.AbstractWorkingMemory.insert(AbstractWorkingMemory.java:888)
> 	  at org.drools.common.AbstractWorkingMemory.insert(AbstractWorkingMemory.java:847)
> 	  at org.drools.impl.StatefulKnowledgeSessionImpl.insert(StatefulKnowledgeSessionImpl.java:269)
> Thread-0 at 1666 daemon, prio=5, in group 'main', status: 'WAIT'
> 	  at sun.misc.Unsafe.park(Unsafe.java:-1)
> 	  at java.util.concurrent.locks.LockSupport.park(LockSupport.java:156)
> 	  at java.util.concurrent.locks.AbstractQueuedSynchronizer.parkAndCheckInterrupt(AbstractQueuedSynchronizer.java:811)
> 	  at java.util.concurrent.locks.AbstractQueuedSynchronizer.acquireQueued(AbstractQueuedSynchronizer.java:842)
> 	  at java.util.concurrent.locks.AbstractQueuedSynchronizer.acquire(AbstractQueuedSynchronizer.java:1178)
> 	  at java.util.concurrent.locks.ReentrantReadWriteLock$WriteLock.lock(ReentrantReadWriteLock.java:807)
> 	  at org.drools.common.UpgradableReentrantReadWriteLock.lowPriorityWriteLock(UpgradableReentrantReadWriteLock.java:105)
> 	  at org.drools.common.UpgradableReentrantReadWriteLock.writeLock(UpgradableReentrantReadWriteLock.java:88)
> 	  at org.drools.common.AbstractRuleBase.lock(AbstractRuleBase.java:472)
> 	  at org.drools.reteoo.builder.PatternBuilder.attachObjectTypeNode(PatternBuilder.java:266)
> 	  at org.drools.reteoo.ClassObjectTypeConf.<init>(ClassObjectTypeConf.java:99)
> 	  at org.drools.common.ObjectTypeConfigurationRegistry.getObjectTypeConf(ObjectTypeConfigurationRegistry.java:71)
> 	  at org.drools.reteoo.Rete.assertObject(Rete.java:107)
> 	  at org.drools.reteoo.ReteooRuleBase.assertObject(ReteooRuleBase.java:286)
> 	  at org.drools.reteoo.ReteooWorkingMemory$WorkingMemoryReteAssertAction.execute(ReteooWorkingMemory.java:435)
> 	  at org.drools.common.AbstractWorkingMemory.executeQueuedActions(AbstractWorkingMemory.java:977)
> 	  at org.drools.common.NamedEntryPoint.insert(NamedEntryPoint.java:322)
> 	  at org.drools.common.NamedEntryPoint.insert(NamedEntryPoint.java:298)
> 	  at org.drools.common.AbstractWorkingMemory.insert(AbstractWorkingMemory.java:888)
> 	  at org.drools.common.AbstractWorkingMemory.insert(AbstractWorkingMemory.java:847)
> 	  at org.drools.impl.StatefulKnowledgeSessionImpl.insert(StatefulKnowledgeSessionImpl.java:269)

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