classcastexception when using dom4jsession to save xml of a versioned class --------------------------------------------------------------------------- Key: HHH-1265 URL: http://opensource.atlassian.com/projects/hibernate/browse/HHH-1265 Project: Hibernate3 Issue Type: Bug Components: core Affects Versions: 3.1 beta 2, 3.1 Environment: hibernate 3.1 oracle windows Reporter: Winston Huang Attachments: hibernate_test.zip, patches.zip when importing from xml format and trying to save the instance using dom4jsession, i got the following exception. it would succeed if i don't use an optimistic locking object (with versioning). see the attached test case for details. i have a many-to-many set relationship from user to role. the xml data files are in User.xml and Role.xml. loading Role.xml is fine. but loading User.xml failed. log4j:WARN No appenders could be found for logger (org.hibernate.cfg.Environment). log4j:WARN Please initialize the log4j system properly. Exception in thread "main" java.lang.ClassCastException: org.dom4j.tree.DefaultElement at org.hibernate.event.def.DirtyCollectionSearchVisitor.processCollection(DirtyCollectionSearchVisitor.java:50) at org.hibernate.event.def.AbstractVisitor.processValue(AbstractVisitor.java:104) at org.hibernate.event.def.AbstractVisitor.processValue(AbstractVisitor.java:64) at org.hibernate.event.def.AbstractVisitor.processEntityPropertyValues(AbstractVisitor.java:58) at org.hibernate.event.def.DefaultFlushEntityEventListener.isUpdateNecessary(DefaultFlushEntityEventListener.java:301) at org.hibernate.event.def.DefaultFlushEntityEventListener.onFlushEntity(DefaultFlushEntityEventListener.java:111) at org.hibernate.event.def.AbstractFlushingEventListener.flushEntities(AbstractFlushingEventListener.java:190) at org.hibernate.event.def.AbstractFlushingEventListener.flushEverythingToExecutions(AbstractFlushingEventListener.java:70) at org.hibernate.event.def.DefaultFlushEventListener.onFlush(DefaultFlushEventListener.java:26) at org.hibernate.impl.SessionImpl.flush(SessionImpl.java:730) at org.hibernate.impl.SessionImpl.managedFlush(SessionImpl.java:329) at org.hibernate.transaction.JDBCTransaction.commit(JDBCTransaction.java:86) at TestDom4jVersionedObject.main(TestDom4jVersionedObject.java:26)