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| AMQ7469 Error |
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| angka |
 Posted: Thu Aug 04, 2011 12:04 am Post subject: AMQ7469 Error |
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Chevalier
Joined: 20 Sep 2005
Posts: 406
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Hi,
Below is the QM setting running on Windows
Log type = Circular
Log file pages = 4k
Primary Log = 155
Secondary Log = 100
Total circular log file size = 4gb plus
I had a long running message flow which will pick up a trigger message (small size) and use the fileRead node to split(100 loops) a 1gb file into 100x10mb messages and put to a output queue. my MQoutput node is not under any transaction. It will commit the message for every loop. All messages is persistent
Then they is another flow (running multiple instances) which will pick up the messages and do some transformation and put the transformation messages into another queue. Each transformed message is about 20mb.
Since I commited the message in both the flows, MQ checkpoint shld release the circular log file for use by another transaction. However, I hit AMQ7469 Transaction rolled back to release log space error. And I realised that only 220 log files instead of 255 were generated. Even if the MQ is too busy writing the logs, thus checkpoint is not executed, the circular log size should be big enough to handle both the flows.
Any help appreciated.
Thanks.. |
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| fjb_saper |
| Posted: Thu Aug 04, 2011 8:52 am Post subject: Re: AMQ7469 Error |
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Grand High Poobah
Joined: 18 Nov 2003
Posts: 20756
Location: LI,NY
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| angka wrote: |
Hi,
Below is the QM setting running on Windows
Log type = Circular
Log file pages = 4k
Primary Log = 155
Secondary Log = 100
Total circular log file size = 4gb plus
I had a long running message flow which will pick up a trigger message (small size) and use the fileRead node to split(100 loops) a 1gb file into 100x10mb messages and put to a output queue. my MQoutput node is not under any transaction. It will commit the message for every loop. All messages is persistent
Then they is another flow (running multiple instances) which will pick up the messages and do some transformation and put the transformation messages into another queue. Each transformed message is about 20mb.
Since I committed the message in both the flows, MQ checkpoint shld release the circular log file for use by another transaction. However, I hit AMQ7469 Transaction rolled back to release log space error. And I realized that only 220 log files instead of 255 were generated. Even if the MQ is too busy writing the logs, thus checkpoint is not executed, the circular log size should be big enough to handle both the flows.
Any help appreciated.
Thanks.. |
Total allocate log space
255 * 4096 *4k => 4GB
Did you also check that there was enough disk space for 255 files? 
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MQ & Broker admin |
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| mvic |
| Posted: Thu Aug 04, 2011 3:10 pm Post subject: Re: AMQ7469 Error |
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Jedi
Joined: 09 Mar 2004
Posts: 2080
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| I don't think you have a lack of log space, I think you have a long-running transaction somewhere among your apps. |
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| bruce2359 |
| Posted: Thu Aug 04, 2011 3:31 pm Post subject: |
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Poobah
Joined: 05 Jan 2008
Posts: 9470
Location: US: west coast, almost. Otherwise, enroute.
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Or more than one, running concurrently or overlapping, such that each log segment has a UofW in-flight.
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ב''ה
Lex Orandi, Lex Credendi, Lex Vivendi. As we Worship, So we Believe, So we Live. |
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| mvic |
| Posted: Thu Aug 04, 2011 3:55 pm Post subject: |
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Jedi
Joined: 09 Mar 2004
Posts: 2080
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| bruce2359 wrote: |
| Or more than one, running concurrently or overlapping, such that each log segment has a UofW in-flight. |
In the OP's case, maybe. But only the oldest one is important when trying to release log space. The oldest transaction is the one that is rolled back because rolling any of the less-old others back would not release log space as long as the oldest one is still running. |
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| angka |
| Posted: Thu Aug 04, 2011 4:17 pm Post subject: |
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Chevalier
Joined: 20 Sep 2005
Posts: 406
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Hi,
It is still in testing phase and thus only one flow is running. There is enough physically harddisk space. No other error found on MQ and windows error logs.
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| mvic |
| Posted: Thu Aug 04, 2011 4:30 pm Post subject: |
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Jedi
Joined: 09 Mar 2004
Posts: 2080
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| angka wrote: |
| There is enough physically harddisk space. |
As I expected.
| Quote: |
| only one flow is running. |
Unlikely. Check all your queues. Look for UNCOM(YES). Look at outputs of DIS QSTATUS, DIS CONN, and so on, to try to find applications that have queues open, and have transactions open for long times. |
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