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| System.OutOfMemoryException exception using MQAX200 (C#) |
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Message
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| fdeback |
 Posted: Tue Jul 27, 2004 5:29 am Post subject: System.OutOfMemoryException exception using MQAX200 (C#) |
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Newbie
Joined: 27 Jul 2004
Posts: 4
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I am using the MQAX200 API from C# in order to poll a queue for arriving messages on a Win2k platform. On some servers where my application is installed, we get systematically a System.OutOfMemoryException.
The different steps of my source code perform the following operations:
- create a serviced component helper object that will do the actual work and manages the transaction.
- within this serviced component:
| Code: |
m_qSession = new MQSessionClass();
m_qManager = (MQQueueManager)m_qSession.AccessQueueManager(queueManagerName);
m_q = (MQQueue)m_qManager.AccessQueue(queueName, (int)MQ.MQOO_INPUT_AS_Q_DEF, "", "", "");
MQGetMessageOptions qGetMessageOptions = (MQGetMessageOptions)m_qSession.AccessGetMessageOptions();
qGetMessageOptions.Options += (int) MQ.MQGMO_WAIT;
qGetMessageOptions.WaitInterval = (int)TIME_TO_WAIT;
qGetMessageOptions.Options += (int) MQ.MQGMO_SYNCPOINT;
qGetMessage = (MQMessage)m_qSession.AccessMessage();
try
{
m_q.Get(qGetMessage, qGetMessageOptions, Type.Missing);
}
catch(COMException err)
{
if ( MQRC_NO_MSG_AVAILABLE == m_q.ReasonCode )
{
ContextUtil.SetAbort();
if(m_qManager != null)
{
m_qManager.Disconnect();
}
return qGetMessage;
}
throw err;
} |
- in case an error was thrown in the serviced component: dispose the serviced component.
- start this process all over again.
For some reason, it seems that the serviced component cannot be disposed correctly: I have the impression that the number of threads within the dllhost keeps increasing, until the system runs out of memory.
Any idea about the reason for this error?
Thanks! |
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| dpchiesa |
| Posted: Fri Aug 13, 2004 4:44 am Post subject: MQAX, C# and interop |
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Apprentice
Joined: 29 May 2002
Posts: 46
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sorry I don't have any good ideas here, but..
> I am using the MQAX200 API from C# ...
have you tried using the amqdnet.dll that ships with wmq5,3 CSD05 and above?
_________________
-dpchiesa |
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| fjb_saper |
| Posted: Fri Aug 13, 2004 11:12 am Post subject: |
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Grand High Poobah
Joined: 18 Nov 2003
Posts: 20756
Location: LI,NY
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Have you tried debugging what is going on in your ComExceptionError block?
What if an exception gets thrown in your Abort/rollback process
If the disconnect is not clean because of additional problems before the code even hits it and you are running this in a poll process .....
Enjoy |
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| fdeback |
| Posted: Mon Aug 23, 2004 8:20 am Post subject: |
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Newbie
Joined: 27 Jul 2004
Posts: 4
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The ComExceptionError block is executed completely, no errors occur in that part. I didn't put the entire source code in my orinigal post, but there is an outer try-catch block managing exceptions that occur in the part that I posted.
As for the amqdnet.dll shipped with wmq5,3 CSD05: no, didn't try that one. The application has to work with mq5.2 as well... |
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| bower5932 |
| Posted: Mon Aug 23, 2004 9:24 am Post subject: |
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Jedi Knight
Joined: 27 Aug 2001
Posts: 3023
Location: Dallas, TX, USA
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| You know that MQ 5.2 is out of support and has been for about 8 months? I'd suggest that you use this issue as your reason to push forward to WMQ 5.3. |
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