[P-279 of EJB3 In Action] states: "Note that the exact @JoinColumn vspecification could have been repeated for both the Bid.item and Item.bids persistent fields on either side of the relationship." [P-280 of EJB3 In Action] states: "The persistence provider will generate deployment-time errors if you specify @JoinColumn on both sides of a bidirectional one-tomany relationship." Aren;t these 2 statements contradictory? View the original post : http://www.jboss.org/index.html?module=bb&op=viewtopic&p=4264446#... Reply to the post : http://www.jboss.org/index.html?module=bb&op=posting&mode=reply&a...