[jboss-user] [JBoss Messaging] - DurableMessagesGoesToDLQAfterRestart

Rickard Dahl do-not-reply at jboss.com
Thu Apr 8 10:13:15 EDT 2010

Rickard Dahl [http://community.jboss.org/people/rickard%40rdahl.se] created the discussion


To view the discussion, visit: http://community.jboss.org/message/536312#536312


Short problem description: After restarting JBoss, pending messages on a durable topic will be put on DLQ. I expect them to stay on the topic even after a restart.

Background to my problem:
I have a topic and two durable subscribers (two MDB's). One of the subscribers will try to deliver messages to a web service, which _can_ be offline. In this case, the MDB will throw an exception. By doing like this, the message will be delivered when the web service comes up again.

By default, the MDB will run 16 sessions in parallell.

The problem is that when the web service is offline and I restart JBoss, all pending messages will be put on DLQ.

After the restart, ther is still 16 messages in 

An example:
- I publish 56 messages to the topic
- The web service is offline
- Subscriber 1 (the "web service" one) now has 56 pending messages
- Subscriber 2: 56 successfully processed messages, 0 pending messages
- DLQ: 0 pending messages

Result after the restart:
- Subscriber 1 (the "web service" one) now has 16 pending messages
- Subscriber 2: 0 pending messages
- DLQ: 40 pending messages

My setup:
- JBoss 4.2.3
- JBoss Messaging 1.4.4 (have also tried with 1.4.2 with the same result)
- Using a MSSQL database for persistance

Note that the problem is NOT that the max number of retries has been reached since the MDB's have a LARGE numer of retries set with annotation "dlqMaxRetries" + each onMessage() takes a ouple of sec because of the web service call.


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