Problem solved! By ignoring the advice to use a .sar file, I've added code to my main application that programmatically registers the MBean. And if using Spring this code can be replaced by some very simple configuration instead. | // get the JBoss JMX MBean Server | MBeanServer server = (MBeanServer) MBeanServerFactory.findMBeanServer(null).get(0); | | // register custom MBean | MonitoringMBean bean = new Monitoring(); | server.registerMBean(bean, new ObjectName("test:name=Monitoring")); | This is a much simpler solution, and needs no classloading configuration at all... View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4018856#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...