Sorry, here are more details: There is no issue with the JMS ID implementation of JBoss Msg 1.2. Only problem is it does not help us in our specific requirement, which goes like this: 1. We want to make sure that each msg getting into the queue has a Sequence Number. 2. We need to make sure that this sequence number is real sequence as who ever posted the message first should get a sequence number that is lower to the one who posts the msg next. 3. The JBossMsg1.2 implementation gives sequence numbers in blocks to each node (1to256 to node1, 257-xxx to node2). 4. In this case we could end-up on node 2 and would get a sequence number for a msg that came in earlier to be higher than the request that came to node1 at a later time. Please confirm that my understanding is correct about the implementation. View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4006947#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...