Hi, i got it working. It was just a basic configuration problem in Eclipse. But now I have a question regarding injection of resources. I am using the Jersey implementation of JSR-311. I use EJB 3.0 (not 3.1). I have exposed a stateless session bean as a RESTful web service. @Path("/blabla") @Stateless public class MyBean implements MyBeanRemote{ @PersistenceContext private EntityManager em; ... } I try to inject a persistence context but it is not working. em is null. So my question is : do injection of resources (@PersistenceContext, @EJB ...) cease to work in a stateless session bean that has been exposed as a RESTful web service ? Thanks View the original post : http://www.jboss.org/index.html?module=bb&op=viewtopic&p=4270167#... Reply to the post : http://www.jboss.org/index.html?module=bb&op=posting&mode=reply&a...