Ok I think I found the problem: copying all the config file from the newer JBM core was not a good idea. These had the PostOffice set to non-clustered. Changing this like at the all config before solved the problem, nor messages are pulled from one the other node.
I have setup a JBoss 5.0 Cluster with JMS Topic deployed in deploy-hasingleton, my first instance starts successfully but when second node starts i am getting this exception, one thing weird i have noticed is that sometimes second node starts smoothly, i dont get this exception - i had to retry 4-5 times to start the server. Can anyone help me in this?
javax.jms.InvalidDestinationException: No such destination: JBossTopic[MyMessage] has it been deployed?