We are facing the following issue on the JBoss server 4.0.4GA.: Our system consists of a number of scheduled JMX services that are configured to start when the JBoss server is started. We implement the org.jboss.varia.scheduler.Schedulable interface for the scheduled services. Each scheduled service runs at regular intervals as configured in the jboss-service.xml file. These services ran fine for many deployments. However, in the latest deployment, none of these scheduled services seem to be running. The JMX console shows them as running. There are absolutely no Exceptions in the server logs. Even stopping and starting the services did not start our scheduled services. Please let me know what are the possibilities that such a scenario may occur in JBoss server and how to resolve them.