This is really weird to me as I would have expected class to be com.test.portal.data.entity.Team however getClass() prints its proxy com.test.portal.data.entity.Team_$$_javassist_9 My entity is detached at that point (it is returned from session EJB under CMT) and it is fully initialized (no lazy load exception occurs when I print its values) I've tried setting hibernate.bytecode.use_reflection_optimizer=false to no avail. Just to explain what happens in my code public Object getId(Object bean) { | return Entity.forClass(bean.getClass()).getIdentifier(bean); | } getId is called for this entity (Team) and getIdentifier throws exception public Object getIdentifier(Object entity) | { | if (identifierGetter!=null) | { | return Reflections.invokeAndWrap(identifierGetter, entity); | } | else if (identifierField!=null) | { | return Reflections.getAndWrap(identifierField, entity); | } | else | { | throw new IllegalStateException("@Id attribute not found for entity class: " + getBeanClass().getName()); | } | } My suspicion that is caused by class of object being com.test.portal.data.entity.Team_$$_javassist_9 instead of real one com.test.portal.data.entity.Team. Any ideas? Thanks View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4067491#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...