[jboss-user] [JBoss Messaging] - Jboss Messaging 1.4.0 SP3 and Message Redistribution / Perfo

daniel.gaiottino do-not-reply at jboss.com
Thu Aug 7 09:49:39 EDT 2008


Im using Jboss 4.2.3 and I've been working to set up Jboss Messaging in a cluster and can't seem to get reliable Message Redistribution working.

I have an app that puts alot of messages on a queue (1000+). The queue is clustered according to the JMX console (I've even looked in the JBM_POSTOFFICE table) but I'm not seeing any message redistribution to the MDBs on my clustered server. Instead the first server which put all the messages on the queue processes all of them.

I've read that the local queue will be prioritized but I'm seeing a significant load spike on the first server while it's processing the messages so I would expect it to hand some over to the other JBoss to share the load.

I've played around with the ClusterPullConnectionFactory setting PrefetchSize to 1 but that had no effect. I even tried setting the SupportsLoadBalancing to true even though this is not recommended but I didn't see a different behaviour.

Another thing I haven't been able to find is where to configure the MaxPoolSize of the MDBs (I thought reducing this might make it share the load) but setting MaximumSize to 5 for message-driven-bean in standardjboss.xml had no effect. It's still set to the default of 15. Where do I chance this?

Things I've noticed: 
- I'm running mysql clustered and both Jboss servers use this database. In JBM_POSTOFFICE I have 2 entries for my clustered queue. Same name but different NODE_ID. Both have CLUSTERED set to Y. Does JBoss bridge these 2 queues to create the clustered queue?
- In the JMX consoles even though I have the queue clustered, and the MDB deployed on both machines, ConsumerCount is 1 on both. I was hoping to see 1 for each machine in the cluster (so 2).

I'm running out of ideas to test to I decided to write for some help on the forums. Hopefully someone will be able to shed some light on why I cant get Message Redistribution working properly.

- Daniel

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