[hibernate-issues] [Hibernate-JIRA] Commented: (HHH-2763) (lazy) m:n relation + EventListener = AssertionFailure: collection [n-side] was not processed by flush()

(lazy) m:n relation + EventListener = AssertionFailure: collection [n-side] was not processed by flush() -------------------------------------------------------------------------------------------------------- Key: HHH-2763 URL: http://opensource.atlassian.com/projects/hibernate/browse/HHH-2763 Project: Hibernate Core Issue Type: Bug Components: core Affects Versions: 3.2.4.sp1, 3.2.5 Environment: Windows-XP, Jboss 4.2.1GA, Hibernate 3.2.4SP1, EJB3 Reporter: S.Schnabl Assignee: Steve Ebersole Priority: Critical Attachments: bidirectional_many-to-many.gif, cdel_analyse.txt, HHH-2763_standalone_testcases.zip, HibernateWorkaroundHH2763.java, one-to-many_with_many_side_having_collections.gif, Testcase.zip For more details see the attached testcase. I'm sorry, but in the short of time i only got a testcase for jboss-server 4.2. Please deploy the server.ear from /release-directory and then call the /src/client/TestCaseClient.java. [Summarized] It seems, that touching a lazy (Persistent-)Collection of at least a m:n relation inside a Hibernate event-listener always raises this error: org.hibernate.AssertionFailure: collection [n-side] was not processed by flush() [Explanation] I have two entities A. and B. Both having a m:n relation between each other. Furthermore there is an PostUpdateListener, which iterates onUpdate of entitiy through all properties of updated entity. [Testcase] Both entities are linked with eachother (m:n). If i now do a simple update of a property of entity A --> MyPostUpdateListener will be called, which iterates through every property of the updated entity. In case of this property was a collection (= lazy PersistentCollection of m:n relation), hibernate initializes the collection for further work. I can now run through all objects of the collection, but after all work is done in listener, I get the following exception from postFlush: Caused by: org.hibernate.AssertionFailure: collection [com.qualitype.testcase.server.ejb.entity.EntityB.entitiesOfA] was not processed by flush() at org.hibernate.engine.CollectionEntry.postFlush(CollectionEntry.java:205) at org.hibernate.event.def.AbstractFlushingEventListener.postFlush(AbstractFlushingEventListener.java:333) at org.hibernate.event.def.DefaultFlushEventListener.onFlush(DefaultFlushEventListener.java:28) at org.hibernate.impl.SessionImpl.flush(SessionImpl.java:1000) at org.hibernate.impl.SessionImpl.managedFlush(SessionImpl.java:338) at org.hibernate.ejb.AbstractEntityManagerImpl$1.beforeCompletion(AbstractEntityManagerImpl.java:515) ... 29 more Attention: EntityB.entitiesOfA is the other-side collection of the m:n relation of the updated EntityA. We are using hibernate-event listener system for auditing-purposes, so you should understand that touching every (element in the) collection is necessary for audit-purposes. Seems for me like a serious bug. Need this fixed asap ...