[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:comment-tabpanel&focusedCommentId=12790643#comment-12790643 ] 

Architect SoftWeb.ISD edited comment on JGRP-1660 at 7/18/13 6:05 AM:
----------------------------------------------------------------------

lockservice_stability_testcase.jar attachment is added.
It is test.
The test is hardcoded to work during 20 seconds with 15 threads.
Java source is inside of the attachment.
We are able to reproduce the problem under MyEclipse IDE with 2 threads in 4 seconds.
But in case of simple JVM start it is not reproducible sometimes even with 15 threads and in 20 seconds.

Command line:
\jdk1.6.0_31\jre\bin\java.exe -cp junit-4.4.jar;jgroups-3.2.4.Final.jar;log4j-1.2.15.jar;lockservice_stability_testcase.jar org.junit.runner.JUnitCore com.softcomputer.softweb.infl.commons.clustering.stabilitytest.LockServiceStabilityTestCase

Dependencies:
jgroups-3.2.4.Final.jar (with jgroups-3.3.3.Final the situation is the same)
junit-4.4.jar
log4j-1.2.15.jar (log4j.xml is inside. It creates test.trace file)
                
      was (Author: architect.softweb.isd):
    It is test.
The test is hardcoded to work during 20 seconds with 15 threads.
Java source is inside of the attachment.
We are able to reproduce the problem under MyEclipse IDE with 2 threads in 4 seconds.
But in case of simple JVM start it is not reproducible sometimes even with 15 threads and in 20 seconds.

Command line:
\jdk1.6.0_31\jre\bin\java.exe -cp junit-4.4.jar;jgroups-3.2.4.Final.jar;log4j-1.2.15.jar;lockservice_stability_testcase.jar org.junit.runner.JUnitCore com.softcomputer.softweb.infl.commons.clustering.stabilitytest.LockServiceStabilityTestCase

Dependencies:
jgroups-3.2.4.Final.jar (with jgroups-3.3.3.Final the situation is the same)
junit-4.4.jar
log4j-1.2.15.jar (log4j.xml is inside. It creates test.trace file)
                  
> 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
>            Priority: Critical
>         Attachments: 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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