[hibernate-issues] [Hibernate-JIRA] Resolved: (HHH-2097) LAZY property results in org.hibernate.TransientObjectException after merge

LAZY property results in org.hibernate.TransientObjectException after merge --------------------------------------------------------------------------- Key: HHH-2097 URL: http://opensource.atlassian.com/projects/hibernate/browse/HHH-2097 Project: Hibernate3 Type: Bug

Components: core Versions: 3.2.0.cr4 Environment: Hibernate3.2 cr4 with Annotations cr2 and EntityManager cr2, Oracle10g R2, WindowsXP Reporter: Reto Urfer Priority: Critical Attachments: BugLazyPropertyMerge.zip Entity1 has a property e2 which references Entity2. This property is defined as follows. @ManyToOne(fetch = FetchType.LAZY, optional = false) private Entity2 e2; If you have an instance e1 of Entity1 which has not initialized property e2 and you merge e1 to the EntityManager within a transaction, then you get the following exception during commit: Exception in thread "main" javax.persistence.RollbackException: Error while commiting the transaction at org.hibernate.ejb.TransactionImpl.commit(TransactionImpl.java:63) at com.test.Test.main(Test.java:42) Caused by: org.hibernate.TransientObjectException: object references an unsaved transient instance - save the transient instance before flushing: com.test.Entity1.e2 -> com.test.Entity2 at org.hibernate.engine.CascadingAction$9.noCascade(CascadingAction.java:350) at org.hibernate.engine.Cascade.cascade(Cascade.java:139) at org.hibernate.event.def.AbstractFlushingEventListener.cascadeOnFlush(AbstractFlushingEventListener.java:130) at org.hibernate.event.def.AbstractFlushingEventListener.prepareEntityFlushes(AbstractFlushingEventListener.java:121) at org.hibernate.event.def.AbstractFlushingEventListener.flushEverythingToExecutions(AbstractFlushingEventListener.java:65) at org.hibernate.event.def.DefaultFlushEventListener.onFlush(DefaultFlushEventListener.java:26) at org.hibernate.impl.SessionImpl.flush(SessionImpl.java:1000) at org.hibernate.impl.SessionImpl.managedFlush(SessionImpl.java:338) at org.hibernate.transaction.JDBCTransaction.commit(JDBCTransaction.java:106) at org.hibernate.ejb.TransactionImpl.commit(TransactionImpl.java:53) ... 1 more I added a small Testproject to reproduce this bug.