Sorry, I am running EJB-RC2 on JBoss 4.0.3-RC2
I guess that maybe you could focus 3 aspects:
1,db connect url, least possible
2,transaction, least possoible
3,entity bean in collection best need equals and hashcode method override, maybe?
I don't think it's the DB because everything else works fine (and I get no errors), and I have similar transaction attributes on other similar methods, and they work 100%.
I will try overriding hashCode()
Thanks a lot.