If you use jBPM in a managed environment, in your case from within an EJB3 bean, you have to set the proper configuration parameters. Otherwise jBPM will delegate transaction handling to Hibernate instead of enrolling in CMT. See: http://docs.jboss.org/jbpm/v3/userguide/persistence.html#thedbpersistence... For jBPM to use managed transactions, it must be configured correctly in jbpm.cfg.xml and hibernate.cfg.xml. In particular in jbpm.cfg.xml set the isTransactionEnabled attribute to 'false'. By setting isTransactionEnabled to false we are telling jBPM to NOT close the hibernate session when the client calls jbpmContext.close(). This is important in a managed environment, since we want hibernate to close the session only after the transaction manager tells Hibernate that it has committed the transaction. | <jbpm-context> | <service name="persistence"> | <factory> | <bean class="org.jbpm.persistence.db.DbPersistenceServiceFactory"> | <field name="isTransactionEnabled"><false /></field> | </bean> | </factory> | </service> | </jbpm-context> | In hibernate.cfg.xml, you should set: | <property name="hibernate.transaction.factory_class">org.hibernate.transaction.JTATransactionFactory</property> | | <property name="hibernate.transaction.manager_lookup_class">org.hibernate.transaction.JBossTransactionManagerLookup</property> | This will make jBPM work with container managed transactions. In your hibernate.cfg.xml remove the property "jta.UserTransaction", as you are enrolling in CMT. Regards, Martin View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4033914#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...