So, if you have two MessageConsumer-s on the same queue in two different connections / sessions / VMs, but only one of them has a MessageListener attached (consumer.setMessageListener(...)) and you send a message using the other session (without a MessageListener attached) - there is some unexpected delay. Additionaly if you close the connection after you send the message the delay is smaller. View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4143417#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...