ok, it is clear now, the Scheduler Servlet is triggering the db.SchedulerSession which is linked to DB Scheduler service. View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=3979197#3979197 Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&p=3979197