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| WebSphere WSAD MDB JMS : MDB fails after 20-30 messages |
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 Posted: Thu Jun 16, 2005 6:40 am Post subject: WebSphere WSAD MDB JMS : MDB fails after 20-30 messages |
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Newbie
Joined: 16 Jun 2005
Posts: 4
Location: France
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Hi,
i'm using WebSphere Server 5.3 with WSAD and an MDB.
I also use OpenSTA to post many messages in the queue.
When i post 20 to 30 messages everything is normal
(the messages are read and put in a output queue using jms).
but with more messages, the MDB read only a few number of messages and then stops.
I don't have any errors anywhere so i'm perplex...
i have try different configurations (pool connection and session)
for the QM Factory ,and also the configuration of the port
but it didn't change anything.
any clue ?
Thanxs in advance
Franck |
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| bower5932 |
| Posted: Thu Jun 16, 2005 7:47 am Post subject: |
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Jedi Knight
Joined: 27 Aug 2001
Posts: 3023
Location: Dallas, TX, USA
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| What version of WMQ are you using (mqver command)? There were some fixes put in at CSD 4 and later to address MDBs that stopped receiving messages. |
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| fjb_saper |
| Posted: Thu Jun 16, 2005 2:43 pm Post subject: |
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Grand High Poobah
Joined: 18 Nov 2003
Posts: 20756
Location: LI,NY
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As well check your messages:
Std behavior:
If the message causing an ejb exception (check std MDB exception causing rollback) cannot be reprocessed in the alloted number of times specified on the MDB you are in presence of a poison message and the MDB stops.
Let's see: an MDB with 10 instances on the queue.
100 messages on the queue. 1st message is a poison message.
1 MDB instance stops while 9 are processing
2 MDB instance stops while 8 are processing
3 MDB instance stops while 7 are processing
.....
9 MDB instance stops while 1 is processing
10 last MDB instance stops (number of retries exceeded)
You have successfully shut down all processing from that queue through MDB with just 1 poison message. Congrats !
To avoid this specify a backout count at least 1 less than the retry count.
Backout count is specified as a queue attribute. Retry count is an MDB attribute.
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| Posted: Mon Jun 27, 2005 12:32 am Post subject: |
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Newbie
Joined: 16 Jun 2005
Posts: 4
Location: France
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-> bower5932 : i have already patched my WMQ so wasn't that
-> fjb_saper : i checked all my messages and they were no poison messages.
The problem was elsewhere : we used a java class to open JMS connections but they were not closed at the end ...
sorry for such a easy mistake
franck |
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