im trying to prevent this scenario: im trying to prevent: x=1 t1 stores x as a1 t2 stores x as a2 t1 increments a1 from 1 to 2 t2 increments a2 from 1 to 2 t1 commits t2 commits the value should be 3 but ends up being 2 should i use pessimistic locking with versioning, and then catch the staleobjectstateexception and handle retrying? View the original post : http://www.jboss.org/index.html?module=bb&op=viewtopic&p=4227904#... Reply to the post : http://www.jboss.org/index.html?module=bb&op=posting&mode=reply&a...