it seems that EntityManager.persist( o ) does not put object o into EJB3EntityTreeCache. at least it does not appear if i go to the jmx console and invoke EJB3EntityTreeCache.printDetails(). however, after the first call to EntityManager.find() that returns the newly persisted objec o, that object does apper when i invoke EJB3EntityTreeCache.printDetails(). some my questions are: is that the expected behavior? does that imply that i make a trip to the db that i don't really need? thanks. View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4024780#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...