I need to update our backup database server when I am writing to our current database server. So I am using two Entity Managers to handle this and pass the same Entity. em.persist(dmvActivity); | em.flush(); | | // write to HotSite DB | emTml.persist(dmvActivity); | emTml.flush(); This worked fine, till I made the entity cacheable. Now I get the following error : javax.ejb.EJBException: javax.persistence.PersistenceException: org.hibernate.PersistentObjectException: detached entity passed to persist: com.cp.mvr.common.ejb.persistence.DmvColor Further, if an entity is set as cacheable, everytime when you do a findAll does the cache get refreshed from the database? Thanks, Peter. View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4103119#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...