Scott Stark wrote: I suppose this is a question for the EJB3 guys. I think ejb3 was falling back to the ejb2 timers and just tried to undeploy ejb3-timer-service.xml from a running instance and it doesn't complaint. I'd love to somehow get rid, reconfigure or activate on demand quartz. From the 69 thread of the default configuration quartz hogs down 22 of them: http-127.0.0.1-8080-1 1578 HDScanner 687 http-127.0.0.1-8080-4 453 http-127.0.0.1-8080-2 328 http-127.0.0.1-8080-3 140 Finalizer 109 DestroyJavaVM 93 DefaultQuartzScheduler_QuartzSchedulerThread 15 JBossEJB3QuartzScheduler_QuartzSchedulerThread 15 JCA PoolFiller 15 RMI TCP Accept-0 15 Thread-12 15 AOPListner 0 AcceptorThread[ServerSocket[addr=/127.0.0.1,port=0,localport=3873]] 0 AcceptorThread[ServerSocket[addr=/127.0.0.1,port=0,localport=4446]] 0 AcceptorThread[ServerSocket[addr=/127.0.0.1,port=0,localport=4457]] 0 ContainerBackgroundProcessor[StandardEngine[jboss.web]] 0 DefaultQuartzScheduler_Worker-0 0 DefaultQuartzScheduler_Worker-1 0 DefaultQuartzScheduler_Worker-2 0 DefaultQuartzScheduler_Worker-3 0 DefaultQuartzScheduler_Worker-4 0 DefaultQuartzScheduler_Worker-5 0 DefaultQuartzScheduler_Worker-6 0 DefaultQuartzScheduler_Worker-7 0 DefaultQuartzScheduler_Worker-8 0 DefaultQuartzScheduler_Worker-9 0 GC Daemon 0 HSQLDB Timer @1c192b5 0 JBoss System Threads(1)-1 0 JBoss System Threads(1)-2 0 JBossEJB3QuartzScheduler_Worker-0 0 JBossEJB3QuartzScheduler_Worker-1 0 JBossEJB3QuartzScheduler_Worker-2 0 JBossEJB3QuartzScheduler_Worker-3 0 JBossEJB3QuartzScheduler_Worker-4 0 JBossEJB3QuartzScheduler_Worker-5 0 JBossEJB3QuartzScheduler_Worker-6 0 JBossEJB3QuartzScheduler_Worker-7 0 JBossEJB3QuartzScheduler_Worker-8 0 JBossEJB3QuartzScheduler_Worker-9 0 JBossLifeThread 0 Listener:4712 0 Listener:4713 0 PooledInvokerAcceptor#0-4445 0 QuartzScheduler_JBossEJB3QuartzScheduler-NON_CLUSTERED_MisfireHandler 0 RMI LeaseChecker 0 RMI Reaper 0 RMI RenewClean-[127.0.0.1:4871] 0 RMI TCP Accept-1090 0 RMI TCP Accept-1098 0 RMI TCP Accept-4444 0 Reference Handler 0 ServerSocketRefresh 0 Signal Dispatcher 0 SubscriptionWatchDog 0 Thread-10 0 Thread-11 0 Thread-13 0 Thread-17 0 Timer-0 0 Timer-1 0 Timer-Log4jService 0 WorkManager(2)-1 0 ZipFile Lock Reaper 0 ajp-127.0.0.1-8009-Acceptor-0 0 http-127.0.0.1-8080-Acceptor-0 0 secondaryServerSocketThread[0] 0