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| 8k limit on MQGET call? |
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| spguk |
 Posted: Tue Oct 22, 2002 2:56 am Post subject: 8k limit on MQGET call? |
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Newbie
Joined: 22 Oct 2002
Posts: 3
Location: England
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I'm developing an application in Delphi 6 which just needs to put and get messages from an MQseries server.
The messages are in an IDOC format for SAP, which means the messages are going to be quite big.
The problem I am encountering is getting messages off the queue. I can put on the queue without any problems, but when I use MQGet with a buffer size of 5000000 I only get the first 8124 characters off the list.
If I set the program up to check the bytes after this, it seems I get memory corruption.
If I put a 10k file on the queue and use the MQAPI tester program to get the data, the data is also truncated at exactly the same point.
Max file size on the MQseries is set to 4mb. Any ideas? |
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| bduncan |
| Posted: Tue Oct 22, 2002 11:29 am Post subject: |
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Padawan
Joined: 11 Apr 2001
Posts: 1554
Location: Silicon Valley
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Which API are you using in Delphi? And which version of MQSeries are you using (CSD, patch level, platform, etc)?
_________________
Brandon Duncan
IBM Certified MQSeries Specialist
MQSeries.net forum moderator |
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| spguk |
| Posted: Wed Oct 23, 2002 12:08 am Post subject: |
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Newbie
Joined: 22 Oct 2002
Posts: 3
Location: England
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I am using MQ 5.2.1 with the latest patch from this website for it, which I downloaded last night. I am also using the delphi files which are also on this site, having just tweaked them to run under a GUI window instead of DOS, and to throw exceptions where errors are raised, but other than that, I've not changed it.
After installing the latest patch for 5.2.1, I still get the same through the API exerciser, as that program also chops the file off at exactly the same point.
I have also tried running this under Windows XP pro and 2000 pro and I get exactly the same results.
The delphi files seem to be using mqm.dll for running the MQ commands.
Any more ideas? |
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| spguk |
| Posted: Wed Oct 23, 2002 3:02 am Post subject: |
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Newbie
Joined: 22 Oct 2002
Posts: 3
Location: England
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Sorted this problem out, it was the put procedure that was only posting 8k, as this buffer was set to 8k!! Thanks for the response anyway 
At least now I have some fairly reliable source code that works in Delphi. |
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| nimconsult |
| Posted: Wed Oct 23, 2002 11:07 pm Post subject: |
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Master
Joined: 22 May 2002
Posts: 268
Location: NIMCONSULT - Belgium
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Also, the API exerciser truncates big messages (I do not remember the limit). This may be the reason why you had the same problem with it.
_________________
Nicolas Maréchal
Senior Architect - Partner
NIMCONSULT Software Architecture Services (Belgium)
http://www.nimconsult.be |
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