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MQSeries.net Forum Index » General IBM MQ Support » Server Connection Channel getting down

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Trainee
PostPosted: Thu Oct 18, 2007 4:17 pm    Post subject: Server Connection Channel getting down Reply with quote

Centurion

Joined: 27 Oct 2006
Posts: 124
Hi,

We have Queue Manager associate with Broker and MDBs are there on the same aix server which will get the messages from the particular queues of Queue Managers.

Problem is Server Connection channel is getting down more frequently and guess MDB Applications could not able to connect at that time and MDB Listeners getting down.

I found following error in qmgr errors.Please through some light on it

10/18/07 19:40:19 - Process(438486.5) User(mqadmin) Program(amqzmuc0)
AMQ7469: Transactions rolled back to release log space.

EXPLANATION:
The log space for the queue manager is becoming full. One or more long-running
transactions have been rolled back to release log space so that the queue
manager can continue to process requests.
ACTION:
Try to ensure that the duration of your transactions is not excessive. Consider
increasing the size of the log to allow transactions to last longer before the
log starts to become full.



As the qmgrs logs are circular we have no clue what do why it is happening

Thank you
Trainee
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fjb_saper
PostPosted: Thu Oct 18, 2007 8:16 pm    Post subject: Reply with quote

Grand High Poobah

Joined: 18 Nov 2003
Posts: 20756
Location: LI,NY
Your error statement is quite clear...

Save the qmgr with MS03. Rebuild it with bigger log files.
Declare more than the default max primary and secondary logs...

Enjoy
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Nigelg
PostPosted: Thu Oct 18, 2007 9:56 pm    Post subject: Reply with quote

Grand Master

Joined: 02 Aug 2004
Posts: 1046
I would also advise that the apps running should be checked for long-running transactions, i.e. many MQPUT or MQGET calls in sycnpoint without MQCMIT.

However, the AMQ7469 does not cause a channel to go down. The sympton in the app is for an MQI call to be returned MQRC_BACKED_OUT; if the app ends if this reason code is returned then that is the reason for the channels ending.

Have a look in the qmgr error logs for AMQ9* msgs, errors to do with channels.
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KramJ
PostPosted: Fri Oct 19, 2007 8:49 am    Post subject: Reply with quote

Voyager

Joined: 09 Jan 2006
Posts: 80
Location: Atlanta
You can increase the number of primary and secondary logs without rebuilding the queue manager.
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