Hi Malik, I tried OptimisticLocking, it didn'T work either. I'm wondering why the reading Tx isn't committed or rolledback in my scenario? My test case consist of one client using the system, so I would expect the Tx to be ended at least when the Http response was written. Do I have to manually commit or rollback the Tx? How could I achieve this? I'll try to increase lock acquisition timeout... and post my results here. Regards Mark View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4122924#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...