After careful examination of logger timestamps across several log files, we discovered this was a deployment timing issue. Our MBean JNDI lookup code was executing after the Manager JAR deployed but before the Query JAR deployed, so a lookup on beans in the former succeeded but a lookup on beans in the latter failed. This happened because we missed a dependency in the MBean definition in jboss-service.xml. View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4123189#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...