Thanks for your thoughts. The unregisterSchedule() method unregisters the scheduler if it has already been registered: public void unregisterSchedule(boolean throwException) throws SchedulerException{ try{ server.unregisterMBean(scheduleName); }catch(Exception e){ // we might want to do it just in case the scheduler is registered already and don't care if not if (throwException) throw new SchedulerException(e.getMessage()); } } I don't think we want to call unregisterSchedule() on the new instance of the MBean after its creation and registration. View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4158742#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...