| Author |
Message
|
| CRyback |
 Posted: Sun Nov 19, 2006 1:48 am Post subject: Message sent to several MDBs |
 |
|
Newbie
Joined: 19 Nov 2006
Posts: 5
|
Hello,
I am administrating a quit simple J2EE environment, where we have some MDBs in WebSphere 5.0.x and as a msg broker we have WebSphere MQ on a separate LPAR.
I bumped into a problem, where it seems that MQ Broker is sending(or the queue) twice a same message to MDBs.
Can anyone confirm are there any parameters related to queues, queue manager that would prohibit this?
Thanks for any help. |
|
| Back to top |
|
 |
| jefflowrey |
| Posted: Sun Nov 19, 2006 6:04 am Post subject: |
|
|
Grand Poobah
Joined: 16 Oct 2002
Posts: 19981
|
There are several different ways this could be happening.
All of them require that some application has been written to cause this. Neither MQ nor Message Broker will do this "automatically" without a reason.
For example, pub/sub is explicitly designed to put the same message on more than one queue. But it will only do it if applications register subscriptions for those different queues.
_________________
I am *not* the model of the modern major general. |
|
| Back to top |
|
|
| CRyback |
| Posted: Sun Nov 19, 2006 10:35 pm Post subject: |
|
|
Newbie
Joined: 19 Nov 2006
Posts: 5
|
Hi,
But this is not a pub/sub queue. And I have verified that the application works in another similar environment. That makes it harder to fix, since I can't replicate the problem  |
|
| Back to top |
|
|
| jefflowrey |
| Posted: Mon Nov 20, 2006 2:20 am Post subject: |
|
|
Grand Poobah
Joined: 16 Oct 2002
Posts: 19981
|
The problem is in your code, somewhere.
It's either in the flow or in the MDB.
But it's not clear to me from what you've posted, what the real problem is.
_________________
I am *not* the model of the modern major general. |
|
| Back to top |
|
|
| fjb_saper |
| Posted: Mon Nov 20, 2006 3:35 am Post subject: |
|
|
Grand High Poobah
Joined: 18 Nov 2003
Posts: 20756
Location: LI,NY
|
I imagine that if you get the message multiple times in your MDB it's because you were not able to process it correctly the first time and threw an EJBException... 
_________________
MQ & Broker admin |
|
| Back to top |
|
|
| CRyback |
| Posted: Mon Nov 20, 2006 10:30 pm Post subject: |
|
|
Newbie
Joined: 19 Nov 2006
Posts: 5
|
| fjb_saper wrote: |
| I imagine that if you get the message multiple times in your MDB it's because you were not able to process it correctly the first time and threw an EJBException... |
Hmm there is no EJBException, and in case an error would happen, it should rollback the transaction making the message available in the queue? |
|
| Back to top |
|
|
|
|
