Hi, I have re-checked the steps in the section 4.1.3. Extra steps to complete your installation of the JBoss Messaging documentation. I have fixed the configurations as explained for the Clu instances, and the standlone instance, especially I have updated the fixes * $JBOSS_CONFIG/deploy/jms-ds.xml, and $JBOSS_CONFIG/deploy/hajndi-jms-ds.xml * $JBOSS_CONFIG/conf/standardjboss.xml * $JBOSS_CONFIG/conf/jboss-service.xml Now the MDBs behave much better in case of a Clu instance stops. Moreover the single instance is now able to stop w/o killing it if no Clus instance is running. I'll make some more tests, but re-checking the config against the docs is certainly a step-forward. View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4157272#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...