[jboss-jira] [JBoss JIRA] Commented: (EJBTHREE-941) merge issue when removing from OneToMany in detached state (layered architecture)

merge issue when removing from OneToMany in detached state (layered architecture) --------------------------------------------------------------------------------- Key: EJBTHREE-941 URL: http://jira.jboss.com/jira/browse/EJBTHREE-941 Project: EJB 3.0 Issue Type: Bug Affects Versions: AS 4.2.0 GA Environment: 13:37:59,625 INFO [ServerInfo] Java version: 1.5.0_09,Sun Microsystems Inc. 13:37:59,625 INFO [ServerInfo] Java VM: Java HotSpot(TM) Server VM 1.5.0_09-b01,Sun Microsystems Inc. 13:37:59,625 INFO [ServerInfo] OS-System: Windows XP 5.1,x86 Reporter: Rico Apfelbeck We work on a client-server environment with a webstart-client with an own JVM. Only the server has access to the JPA. POJOs are transfered from client to server and back. Our Issue occurs in the following workflow: - We get an Object A on the server from the Entitymanager and transfer it to the client. - This Object has a OneToMany-relation to some Objects B (fetchtype: EAGER, cascade: ALL). In B we have a reference to A. - On the client we remove in A some B from the Set, for example with clean() and transfer A back to the server. - We merge A on the server. - There is no exception thrown. The returned A from the merge-call does not contain any B, reloading A by Id results in a restored list containing the removed Bs. While added new Bs to A are stored correctly, removing them doesn't result in the deletion of the removed Bs from the database. Updating B in the List in A results in updated Bs when merging A. Only the removal causes problems. We assume that the problem comes from checking the now empty list against the database. Reloading A before merging in the server and manually compare the List of Bs, using EntityManager.remove() when neccesary. helps our case, but that's not the way it shoud be. :)