Hi, I'm using threads inside a stateless bean and I cannot persist anything without having that annoying message that states I can only use transaction manager inside a transactional context. I've tried to make a busy-wait on my stateless bean so I can assure my bean will be alive until the very moment my thread needs the entityManager but when the execution reaches the entityManeger.merge( object ) an exception is risen. The story: I have a jboss-4.0.5.GA with an upgrade on my original Javassist. Now I have javassist-3.4 due to issues with threads. My application needs to perform a fork in execution flow split in three parts. Both of them are created as threads and are observed in normal-fashion-way observer pattern, where the Stateless Bean is the observer. I have a hunch that my bean life-cycle ends before my first thread finishes, so the entityManager looses it transactional context. Can anybody point a blueprint for creating a structure to support such a business demand? Here some parts of my code so you can place yourself. This code comes with only one thread. The original one has three, all like this one. @TransactionManagement(TransactionManagementType.CONTAINER) public @Stateless(name = "TempoRealRN") class TempoRealRNBean extends IntegratorCommonBehavior implements TempoRealRN, Observer { @EJB(beanName = "GenericoDAO") GenericoDAO genericoDAO; @PersistenceContext private EntityManager entityManager; private static final Log log = LogFactory.getLog(TempoRealRNBean.class); ... public void processar(CommonController controladorComum) throws IntegratorException { super.setEntityManager(this.entityManager); tCorFrente = new ThreadCorFrente(controladorComum, this, log, dto, nomeThreadFrente, grupoFrente); tCorFrente.addObserver(this); tCorFrente.start(); }// ends of: public void processar(...) .... /* * receives notification from thread state change and executes the proper action to acomplish bussiness rule goals. * */ public void update(Object o) { //perform some state tests //then try to persist. //at this point an exception is risen this.entityManager.merge( object ); } }//ends public void update(Object o) }//ends class The exception risen is: -------------------------- 17:01:47,480 ERROR [STDERR] Caused by: javax.persistence.TransactionRequiredException: EntityManager must be access within a transaction 17:01:47,480 ERROR [STDERR] at org.jboss.ejb3.entity.ManagedEntityManagerFactory.verifyInTx(ManagedEntityManagerFactory.java:150) 17:01:47,480 ERROR [STDERR] at org.jboss.ejb3.entity.TransactionScopedEntityManager.merge(TransactionScopedEntityManager.java:180) 17:01:47,480 ERROR [STDERR] at wm.integrator.negocio.temporeal.impl.TempoRealRNBean.persistirFrente(TempoRealRNBean.java:485) It would be great if some good soul could enlight me regarding on how to use the proper pattern for observing threads and how I can make this persistence work. Thank you all just for being patient enough to read this extensive post. I apologize myself for any English grammar misuse or misspell as English is not my 1st language. I'm from Brazil. View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4064742#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...