When a MDB (message driven bean) instance number 6789 sends (asynchronously) a JMS Request to a message broker it expects later a JMS response. Assume now this JMS response is put into the queue by a server. How can I ensure that MDB instance 6789 gets the response which is intended for him and not the other instance 2345 (who is listening at the same queue)? This is normally done by passing a JMS correlation ID in JMS header. But who is how responsible to direct the JMS response to the corresponding initiator/requestor? Is this done (automatically) in MessageBroker or does the Java MDB has to keep track? -- View this message in context: http://activemq.2283324.n4.nabble.com/How-does-JMS-correlation-work-in-Java-tp2970065p2970065.html Sent from the ActiveMQ - User mailing list archive at Nabble.com.