Downloaded the source code of JBoss-4.0.4 GCA and after debugging found that the culprit was the following statement in ResourceHandler.java of JBoss: Line number: 283 if (!ref.type().equals(Object.class)) ref.type() returns null and the subsequent call to equals method throws a NullpointerException. Surprisingly, this is a very simple injection and i have seen this type of injection being used in the EJB3 Trail. I even tried moving the annotation to method level: @Resource | public void setSessionContext(SessionContext sessionCtx) { | System.out.println("Setting the session context: " + sessionCtx); | this.sessionContext = sessionCtx; | } Even in this case i get the NullPointerException. This time at: anonymous wrote : java.lang.NullPointerException | at org.jboss.ejb3.injection.ResourceHandler.loadMethodInjectors(ResourceHandler.java:183) The reason is the same as mentioned above, this time in the loadMethodInjectors method. Am i doing something wrong? Cant believe that this simple injection fails. View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=3960634#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...