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Date: Tue, 5 Feb 2013 01:53:12 +0000 (UTC)
From: "Helen Huang (JIRA)" <jira@apache.org>
To: dev@activemq.apache.org
Message-ID: <JIRA.12630466.1359760568868.243239.1360029192885@arcas>
In-Reply-To: <JIRA.12630466.1359760568868@arcas>
References: <JIRA.12630466.1359760568868@arcas>
Subject: [jira] [Commented] (AMQCPP-451) The number of CMS threads increases
 when we restart the message broker repeatedly
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    [ https://issues.apache.org/jira/browse/AMQCPP-451?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13570859#comment-13570859 ] 

Helen Huang commented on AMQCPP-451:
------------------------------------

Just want you to know that the problem is recreatable using the code under activemq-cpp\src\examples\cmstemplate-stress with some changes to increase the frequence that we send out messages, and the length of the test. Attached please find the modified code. In my test, I did not run the program with any input parameters. So the test used 25 senders and receivers, and targeted to run 24000 secondes. The broker was restarted every 30 seconds during the test.
                
> The number of CMS threads increases when we restart the message broker repeatedly 
> ----------------------------------------------------------------------------------
>
>                 Key: AMQCPP-451
>                 URL: https://issues.apache.org/jira/browse/AMQCPP-451
>             Project: ActiveMQ C++ Client
>          Issue Type: Bug
>    Affects Versions: 3.5.0
>         Environment: Windows xp service pack 3, ActiveMQ broker 5.3.1, apr 1.4.2, apr-util 1.3.9, apr iconv 1.2.1
>            Reporter: Helen Huang
>            Assignee: Timothy Bish
>            Priority: Critical
>             Fix For: 3.5.0
>
>         Attachments: CrashHang_Report__CMHMultiTestWithCom.exe__02012013222736766.mht
>
>
> The number of CMS threads increases when we restart the message broker repeatedly. We have ten senders and ten receivers in out test. Every sender sends out 10-20 messages every second. We restart the broker every 1 minute. The number of threads in CMS grew from about 50 to 600 after about 15 hours of testing. The attached dump was created after we ran two hours of test. From the dump we find a large number of threads are stuck at the following place:
> Function   Source 
> ntdll!KiFastSystemCallRet    
> ntdll!ZwWaitForSingleObject+c    
> kernel32!WaitForSingleObjectEx+a8    
> kernel32!WaitForSingleObject+12    
> activemq_cppud!decaf::internal::util::concurrent::PlatformThread::interruptibleWaitOnCondition+25    
> activemq_cppud!`anonymous namespace'::threadEntryMethod+9b    
> msvcr80d!_callthreadstartex+51    
> msvcr80d!_threadstartex+87    
> kernel32!BaseThreadStart+37 

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