Hi there, I'm new to EJB3 and not sure if the behavior is correct or not. I have a stateless session bean that searches for an Entity bean and returns the found object to the client: FIRST SESSION BEAN | | public DestructionBin findDestructionBin(long id) { | return manager.find(DestructionBin.class, id); | } | The client is a struts application. The returned entity is assigned to an ActionForm and is then changed on a webpage. Once the form is submitted I get this modified entity and call an update method on another stateless session bean. STRUTS ACTION PROCESSING... | | public ActionForward saveData(ActionMapping mapping, ActionForm form, | HttpServletRequest request, HttpServletResponse response) { | EditBinForm formObj = (EditBinForm) form; | | try { | ManageDestructionBin mngBins = (ManageDestructionBin) GeneralWebUtil.getJNDIObject(ManageDestructionBinBean.JNDILocal, ManageDestructionBin.class); | | if (formObj.getId() > 0) | mngBins.updateDestructionBin(formObj.getBin(), formObj | .getWarehouse()); | ... | | SECOND SESSION BEAN | | public boolean updateDestructionBin(DestructionBin bin, long warehouse) | throws WarehouseException { | try { | Warehouse wh = mngWarehouse.findWarehouse(warehouse); | bin.setWarehouse(wh); | manager.merge(bin); | } catch (Exception e) { | throw new WarehouseException(e.getMessage()); | } | | return true; | } | However, when the merge is called.. this is the stacktrace I get from EJB server: | 09:43:51,941 WARN [JDBCExceptionReporter] SQL Error: 0, SQLState: null | 09:43:51,941 ERROR [JDBCExceptionReporter] Batch entry 0 update TBL_DESTRUCTION_BIN set LASTUPDATE_=2007-05-16 09:43:51.809000 +1000, STATUS_=NULL, CLIENTREF_=VIC71234560, ACCESSCOUNT_=0, CREATEDBY_=NULL, BARCODE_=NULL, CREATEDATE_=NULL, LASTACCESSED_=NULL, PRINTED_=0, TYPE_=ST, SIZE_=1L, WAREHOUSE_=2, DEPARTMENT_=NULL, BUSINESSDAY_=0, COLLECTIONDATE_=NULL, DELIVERYDATE_=NULL, ROTATIONSCHEDULE_=NULL where ID_=4 was aborted. Call getNextException to see the cause. | 09:43:51,942 WARN [JDBCExceptionReporter] SQL Error: 0, SQLState: 23502 | 09:43:51,942 ERROR [JDBCExceptionReporter] ERROR: null value in column "status_" violates not-null constraint | 09:43:51,942 ERROR [AbstractFlushingEventListener] Could not synchronize database state with session | org.hibernate.exception.ConstraintViolationException: Could not execute JDBC batch update | Could anyone please tell me if this is the correct behavior? It's quite annoying to find the object again and just change the updated fields.. and I also don't think this is the solution for it ehehehehe View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4045992#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...