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| MQGET with SYNCPOINT - UOW |
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| cferreira |
 Posted: Thu Aug 15, 2002 7:27 am Post subject: MQGET with SYNCPOINT - UOW |
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Newbie
Joined: 20 May 2002
Posts: 7
Location: Rio de Janeiro, Brazil
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Hello people !
I´m not a specialist in MQ, so I´m here again with a question.
I work programming with MQSeries client for AT&T GIS UNIX - NCR, The release is v 2.1-1996.
I developed an application using UOW with SYNCPONT to put messages in the queues. This program runs perfectly without errors, doing properly backouts and commits.
Now I developed a similar program using UOW with SYNCPOINT to GET messages from the queues.
There is a problem, that I can´t resolve without your help, friendly MQ specialists !
For example, after I call 3 or 4 times MQGET with SYNCPOINT and then call MQBACK to restore messages to que queue, the MQBACK function returns Completion code = 0 and Reason code = 0
but the the messages don´t go again to que queues !!!
Seeking and searching MQ´s manual I found a QMODEL attribute called 'BackoutThreshold' now its value is 0.
Questions :
1) Is this the cause of my problem ? I have to modify this value ?
2) In positive answer,
2.1) there is the same attribute for each queue in the queue
manager, so I have to modify this value for each queue ?
2.2) How to calculate an appropriate value for this attribute, or which
is more common to use ?
3) In Negative answer,
How to resolve this problem using SYNCPOINT ?
My MQI is too old and doesn´t exist MQBEGIN
regards,
Claudio Ferreira
_________________
Claudio Ferreira
Senior System Analyst |
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| bduncan |
| Posted: Thu Aug 15, 2002 7:57 am Post subject: |
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Padawan
Joined: 11 Apr 2001
Posts: 1554
Location: Silicon Valley
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Are you using MQClient for the MQGETs as well, or is your applicaton connecting directly to the queue manager?
Also, MQBEGIN is only used during transaction coordination (XA) so it sounds like you don't need to worry about using it.
_________________
Brandon Duncan
IBM Certified MQSeries Specialist
MQSeries.net forum moderator |
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| cferreira |
| Posted: Thu Aug 15, 2002 10:21 am Post subject: |
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Newbie
Joined: 20 May 2002
Posts: 7
Location: Rio de Janeiro, Brazil
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Hello Brandon,
My Application is using MQClient to connect MQServer installed in another machine.
_________________
Claudio Ferreira
Senior System Analyst |
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| mrlinux |
| Posted: Thu Aug 15, 2002 12:24 pm Post subject: |
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Grand Master
Joined: 14 Feb 2002
Posts: 1261
Location: Detroit,MI USA
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The backout threshold is not used by MQSeries for anything. It is there
for applications to look at to decide at what point to give up on a bad message.
_________________
Jeff
IBM Certified Developer MQSeries
IBM Certified Specialist MQSeries
IBM Certified Solutions Expert MQSeries |
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| cferreira |
| Posted: Thu Aug 15, 2002 3:04 pm Post subject: |
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Newbie
Joined: 20 May 2002
Posts: 7
Location: Rio de Janeiro, Brazil
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Thanks for attention Brandon, and Jeff for the explanation of backout threshold. Although the problem persists.
_________________
Claudio Ferreira
Senior System Analyst |
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