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From "Helen Huang (JIRA)" <j...@apache.org>
Subject [jira] [Comment Edited] (AMQCPP-451) The number of CMS threads increases when we restart the message broker repeatedly
Date Tue, 05 Feb 2013 17:30:13 GMT

    [ https://issues.apache.org/jira/browse/AMQCPP-451?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13570859#comment-13570859
] 

Helen Huang edited comment on AMQCPP-451 at 2/5/13 5:28 PM:
------------------------------------------------------------

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 run the program without 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 threads increased
by about 40 after two hour.
                
      was (Author: hhuang):
    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 threads increased
by about 40 after two hour.
                  
> 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: cmstemplate-stress.zip, 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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