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| ddm |
 Posted: Tue Nov 02, 2004 4:19 pm Post subject: Queue.Get() method: Weird?? |
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Apprentice
Joined: 17 Nov 2003
Posts: 40
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I am using AMQMDNET.DLL on an MQSeries 5.3 Client and CSD05. I have 2 apps one is a regular windows application and the other is a web application.
I noticed a weird behavior on the Queue.Get() method. For the Windows app, it waits until the message I am retrieving is appears. On the other hand for the web app, I am getting a 2033 error, immediately. It seems it does not even try to get the message.
I tried putting a sleep before the Get(), now the 2033 is intermittent.
I am using C# on W2K platform
Thanks! |
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| PeterPotkay |
| Posted: Tue Nov 02, 2004 5:13 pm Post subject: |
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Poobah
Joined: 15 May 2001
Posts: 7722
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csd06 introduced many fixes for amqmdnet.dll.
csd08 is the latest. I would upgrade and then try again.
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For the Windows app, it waits until the message I am retrieving is appears.
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You are specifying a Wait Interval in the GMO options?
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On the other hand for the web app, I am getting a 2033 error, immediately. It seems it does not even try to get the message.
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You are NOT specifying a Wait Interval in the GMO options?
_________________
Peter Potkay
Keep Calm and MQ On |
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| ddm |
| Posted: Wed Nov 03, 2004 8:03 am Post subject: |
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Apprentice
Joined: 17 Nov 2003
Posts: 40
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Thanks for the reply.
Actually, i am specifying a WAIT on the web app but still it doesn't do it.
Any more ideas why?
Is the CSD08 backwards compatible with 05? Will my old code still work?
Thanks again! |
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| kirani |
| Posted: Wed Nov 03, 2004 9:35 am Post subject: |
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Jedi Knight
Joined: 05 Sep 2001
Posts: 3779
Location: Torrance, CA, USA
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Can you post the peiece of code where you specify the WAIT time?
_________________
Kiran
IBM Cert. Solution Designer & System Administrator - WBIMB V5
IBM Cert. Solutions Expert - WMQI
IBM Cert. Specialist - WMQI, MQSeries
IBM Cert. Developer - MQSeries
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| PeterPotkay |
| Posted: Wed Nov 03, 2004 9:35 am Post subject: |
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Poobah
Joined: 15 May 2001
Posts: 7722
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If you issue an MQGET , and it returns a 2033 imediatly without waiting, then you are not setting a waitinterval. Remember, you need to set the interval value to something greater than 0 (in miliiseconds) AND set the wait option.
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Is the CSD08 backwards compatible with 05? Will my old code still work?
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It should.
Make sure you re register the amqmdnet, so you are running with the new version!
_________________
Peter Potkay
Keep Calm and MQ On |
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| ddm |
| Posted: Wed Nov 03, 2004 3:15 pm Post subject: |
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Apprentice
Joined: 17 Nov 2003
Posts: 40
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Thank you very much for all your input.
I just set the WaitInterval property to 'MQC.MQWI_UNLIMITED' and it worked!!!! |
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| kirani |
| Posted: Wed Nov 03, 2004 3:49 pm Post subject: |
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Jedi Knight
Joined: 05 Sep 2001
Posts: 3779
Location: Torrance, CA, USA
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Be careful when you set your wait time to Unlimited. You should have some mechanism to terminate your program, like putting a message on the queue with some flag (Feedback code/MessageType = something) and your program checking for that flag before terminating normally.
_________________
Kiran
IBM Cert. Solution Designer & System Administrator - WBIMB V5
IBM Cert. Solutions Expert - WMQI
IBM Cert. Specialist - WMQI, MQSeries
IBM Cert. Developer - MQSeries
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| bower5932 |
| Posted: Thu Nov 04, 2004 2:57 am Post subject: |
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Jedi Knight
Joined: 27 Aug 2001
Posts: 3023
Location: Dallas, TX, USA
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| And make sure you specify the FAIL_IF_QUIESCING option in case the qmgr is shutting down. |
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| ddm |
| Posted: Thu Nov 04, 2004 9:01 am Post subject: |
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Apprentice
Joined: 17 Nov 2003
Posts: 40
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| kirani wrote: |
| Be careful when you set your wait time to Unlimited. You should have some mechanism to terminate your program, like putting a message on the queue with some flag (Feedback code/MessageType = something) and your program checking for that flag before terminating normally. |
I am not familiar with what you just said. Can you give me a sample code that does this (in C# will be great!)? Also, what is the impact if I don't do your suggestion.
Thanks again! I really appreciate it. |
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| kirani |
| Posted: Thu Nov 04, 2004 9:21 am Post subject: |
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Jedi Knight
Joined: 05 Sep 2001
Posts: 3779
Location: Torrance, CA, USA
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Well, basically what I was saying is it's a good practice to specify some timeout period for your application. For example, you application will wait for 30 seconds for reply message on the queue before ending/timing-out.
But, if you want to specify "unlimited wait time" then your application should have some logic to end normally. Here is a psudo code that you can use in your program.
| Code: |
get message from the queue.
if (mqmd.MessageType = "some constant value")
end application.
elseif (mqmd.MessageType = Reply)
process reply message
endif
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With this code, you can control your application by putting a "special message" on the queue where MQMD.MessageType will be some "constant value".
_________________
Kiran
IBM Cert. Solution Designer & System Administrator - WBIMB V5
IBM Cert. Solutions Expert - WMQI
IBM Cert. Specialist - WMQI, MQSeries
IBM Cert. Developer - MQSeries
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