anonymous wrote : and into my stateless sessionbean i have created 10 Threads | | but i got an error like this | | entityManager.persist(usageObject); // this is ThreadMy.java:81 | | how i can fix it ? | can anybody tell me ? | Do not use in Threads main entity manager, call in each Thread another sessionbean which will do what now Thread does (persist) (or call the same, but different method). View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4039611#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...