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| channel changing msgid field |
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| mrlinux |
 Posted: Tue May 25, 2004 11:33 am Post subject: channel changing msgid field |
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Grand Master
Joined: 14 Feb 2002
Posts: 1261
Location: Detroit,MI USA
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I have an application that writes to a qremote definition on 0s390/mqv5.3
each message has a unique msgid in mqmd (verified w MQVisual Edit)
after landing on the Local Queue on NTv4 SP6A MQ v5.2 CSD 06 the
msgid's are all the same. Any Ideas why ???
_________________
Jeff
IBM Certified Developer MQSeries
IBM Certified Specialist MQSeries
IBM Certified Solutions Expert MQSeries |
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| PeterPotkay |
| Posted: Tue May 25, 2004 12:45 pm Post subject: |
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Poobah
Joined: 15 May 2001
Posts: 7722
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Because the application on the sending side produced messages all with the same message ID.
I assume you looked at the message IDs on the XMITQ on the sending side? If yes, when you were looking at the MQMD, you were looking at the MQMD of the message on a XMITQ, which is not the same MQMD of the original message. The original MQMD follows the XMITQ Header in the buffer.
A logical view of a message on the XMIT queue is like this:
[MQMD (a new one)] [Message Buffer]
The message buffer is really:
[XMITQ Header][Original Application generate MQMD][application data]
When the RCVR MCA puts the message to the original queue, it tosses the new MQMD, it tosses the XMITQ header, and puts the message to the queue with the original MQMD.
Try your test again, but this time, look at the embedded MQMD's MessageIDs. I bet they will be the same.
_________________
Peter Potkay
Keep Calm and MQ On |
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