[jboss-user] newbie question: jpa and ejb - no default PersistenceUnit

Hi, I'm new to JBoss and Eclipse. I've been using NetBeans and GlassFish for Java EE development. Now I'm working on a very simple PoC just to see how I can use these technologies. I have a very simple JPA project. It contains a persistence xml and a few entities, inherited from each other. persistence.xml excrept: <persistence version="1.0" ...> <persistence-unit name="HotelPoi" transaction-type="JTA"> ... </persistence-unit> </persistence> I have an EJB project too, it contains a stateless session bean. The bean injects a persistence unit this way: @PersistenceUnit(name="HotelPoi") EntityManager em; I receive the following deploy-time exception: 2010-11-10 12:19:51,656 DEBUG [org.jboss.ejb3.Ejb3Module] Starting failed jboss.j2ee:service=EJB3,module=HotelPoiFinder.jar java.lang.RuntimeException: Illegal @PersistenceUnit on javax.persistence.EntityManager com.edreams.poi.finder.PoiFinder.em :There is no default persistence unit in this deployment. at org.jboss.injection.PersistenceUnitHandler.handleFieldAnnotations(PersistenceUnitHandler.java:247) at org.jboss.injection.InjectionUtil.processFieldAnnotations(InjectionUtil.java:137) at org.jboss.injection.InjectionUtil.processAnnotations(InjectionUtil.java:174) I double-checked the ear and it contains the JpaProject in the lib directory. I placed it in the root dir too and receive the same exception. I'm using JBoss 4.2.3.GA and Eclipse with the following build id: 20100617-1415 Do you have any ideas how to make this injection work? Best Regards, Tamas