[jboss-jira] [JBoss JIRA] (JGRP-1660) LockService hangs during concurrent access (tryLock/tryLock(timeout)/lock/unlock)

[Architect SoftWeb.ISD (JIRA)]

     [ https://issues.jboss.org/browse/JGRP-1660?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Architect SoftWeb.ISD reopened JGRP-1660:
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it is still actual.
jgroups-3.4.0.Final.jar is used.
It is possible to reproduce the issue with 50 threads on each of two nodes.
I propose you play with the amounts and I am sure you will be able to reproduce it.
                
> LockService hangs during concurrent access (tryLock/tryLock(timeout)/lock/unlock)
> ---------------------------------------------------------------------------------
>
>                 Key: JGRP-1660
>                 URL: https://issues.jboss.org/browse/JGRP-1660
>             Project: JGroups
>          Issue Type: Bug
>    Affects Versions: 3.2.4, 3.3.3
>         Environment: Intel(R) Core(TM) i5-2310 CPU @ 2.90GHz
> 6GB RAM
> Windows 7
> JRE 1.6.31
>            Reporter: Architect SoftWeb.ISD
>            Assignee: Bela Ban
>             Fix For: 3.3.5, 3.4
>
>         Attachments: bla2.java, lock.xml, lock.xml, LockServiceStabilityTestCase.java, LockServiceStabilityTestCase.java, LockServiceStabilityTestCase.java, lockservice_stability_testcase.jar
>
>
> We have rather simple test that starts some amount of threads which in turn simultaneously obtain lock through LockService#getLock then perform lock and unlock.
> Each thread works during some time.
> After couple of seconds of work some threads just hang up in Locking$ClientLock(Object).wait() called indirectly from LockService$LockImpl.tryLock().
> Here is stack trace:
> Thread [Thread-ClientImitation-1] (Suspended)                
>                 Object.wait(long) line: not available [native method]      
>                 Locking$ClientLock(Object).wait() line: 485          
>                 Locking$ClientLock.acquireTryLock(long, boolean) line: 1010       
>                 Locking$ClientLock.tryLock() line: 896     
>                 CENTRAL_LOCK(Locking).down(Event) line: 152                
>                 ProtocolStack.down(Event) line: 1025    
>                 JChannel.down(Event) line: 718                
>                 LockService$LockImpl.tryLock() line: 102               
>                 LockServiceStabilityTestCase$ClientImitation.run() line: 167        
>                 Thread.run() line: 662     

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