[jboss-as7-dev] Problems with HA singleton service on JBoss 7.1.1

Dear all, I've been playing around with the HA singleton service of JBoss AS7. I took the example in https://access.redhat.com/site/documentation/en-US/JBoss_Enterprise_Appli... as a basis and use a EJB Singleton to start and stop the HA singleton service. Starting the service works fine, I also tested the fail-over behaviour between different nodes. However, I encountered some strange behaviour when it is up to stop the service: - When I shutdown the server, the service is properly stopped and the corresponding method stop() method is executed - When I undeploy the app the PreDestroy method of the EJB singleton is executed and I try to stop the HA singleton service as in the example. However, it seems that the service is already in the REMOVED state and unfortunately, the stop method of the singleton service is never executed. So I have no possibility to clean up the resources that are claimed by the service (TCP socket connection). This is not the behaviour I'd expect The code of the EJB singleton for service starting/stopping is as follows: @Singleton @Startup public class ServiceInstaller { private static final Logger LOGGER = LoggerFactory.getLogger(ServiceInstaller.class); @PostConstruct public void init() { LOGGER.info("Starting singleton"); SimpleService service = new SimpleService(); SingletonService<String> singleton = new SingletonService<String>(service, SimpleService.SINGLETON_SERVICE_NAME); ServiceController<String> controller = singleton.build(CurrentServiceContainer.getServiceContainer()) .addDependency(ServerEnvironmentService.SERVICE_NAME, ServerEnvironment.class, service.getEnvInjector()) .install(); ServiceListener<String> listener = new NotifyingServiceListener<String>(); controller.addListener(listener); controller.setMode(ServiceController.Mode.ACTIVE); LOGGER.info("Singleton started"); } @PreDestroy public void destroy() { LOGGER.info("Destroying singleton"); ServiceController<?> controller = CurrentServiceContainer.getServiceContainer().getRequiredService(SimpleService.SINGLETON_SERVICE_NAME); controller.setMode(ServiceController.Mode.REMOVE); LOGGER.info("Singleton destroyed"); } private static class NotifyingServiceListener<T> extends AbstractServiceListener<T> { @Override public void transition(ServiceController<? extends T> controller, Transition transition) { LOGGER.info("Change state from " + transition.getBefore().toString() + " to " + transition.getAfter().toString()); } } } I've tested this using JBoss 7.1.1 and the standalone-ha.xml configuration. Another weird issue is that, if I redeploy the app after I've deployed it, the deployment fails. The log shows me that the service with the same name is already registered. However, I have not found a possibility to unregister such a service. Any suggestions? Is this a bug in JBoss? Thanks, Ingo