[hibernate-issues] [Hibernate-JIRA] Commented: (HHH-3079) composite-id, sequence and merge call result in a NullPointerException

composite-id, sequence and merge call result in a NullPointerException ---------------------------------------------------------------------- Key: HHH-3079 URL: http://opensource.atlassian.com/projects/hibernate/browse/HHH-3079 Project: Hibernate3 Issue Type: Bug Affects Versions: 3.2.5 Environment: Oracle 10/XE Windows XP JDK 1.5.0 Reporter: Jean-Baptiste Lalanne Attachments: oneup-hibernate-test.zip I got problem during the migration process from HB 2 to 3.2.5. We use Oracle as DB, problem happens when calling merge on a persistent entity A. This instance A has a relation (one-to-many) to another entity B, this instance is transient and has a generated id (from an oracle sequence), it has also a one-to-many relation to a third entity C. This last one has a composite id that includes a reverse one-to-many link to B. Here comes mapping definition, see attached eclipse project sample that runs with an Oracle XE : <!-- entity A --> <class name="EventImpl" table="EV_EVENT"> <id column="EVT_ID" name="id" type="java.lang.Long"> <generator class="sequence"> <param name="sequence">SEQ_EV_ID</param> </generator> </id> </class> <!-- entity B --> <class name="ScheduleImpl" table="EV_SCHEDULE"> <!-- primary key --> <id column="SCH_ID" name="id" type="java.lang.Long"> <generator class="sequence"> <param name="sequence">SEQ_EV_ID</param> </generator> </id> <property column="LAB_ID" name="labId" not-null="true" type="java.lang.Long"/> <set name="scheduleDetails" cascade="all-delete-orphan" lazy="false" inverse="true"> <key column="SCH_ID"/> <one-to-many class="ScheduleDetailImpl"/> </set> </class> <!-- entity C --> <class name="ScheduleDetailImpl" table="EV_SCHEDULE_DETAIL"> <!-- Cache directive --> <cache usage="read-write" /> <!-- Composite primary key --> <composite-id name="id" class="ScheduleDetailImplPK"> <key-many-to-one class="com.cegedim.oneup.events.srv.domain.schedule.impl.ScheduleImpl" name="schedule" column="SCH_ID" /> <key-property column="LINE_RNK" name="lineRnk" type="java.lang.Long" /> </composite-id> </class> When calling merge on A i got this stacktrace, sounds like a bad propagation of the generated B PK during cascading. If i call saveOrUpdate all works fine, the HB2 code was calling the saveOrUpdateCopy and it worked fine. Does anybody got the same issue ? : Exception in thread "main" java.lang.NullPointerException at org.hibernate.type.AbstractType.getHashCode(AbstractType.java:112) at org.hibernate.type.AbstractType.getHashCode(AbstractType.java:120) at org.hibernate.type.EntityType.getHashCode(EntityType.java:279) at org.hibernate.type.ComponentType.getHashCode(ComponentType.java:189) at org.hibernate.engine.EntityKey.generateHashCode(EntityKey.java:104) at org.hibernate.engine.EntityKey.<init>(EntityKey.java:48) at org.hibernate.event.def.DefaultMergeEventListener.onMerge(DefaultMergeEventListener.java:100) at org.hibernate.impl.SessionImpl.fireMerge(SessionImpl.java:687) at org.hibernate.impl.SessionImpl.merge(SessionImpl.java:669) at org.hibernate.engine.CascadingAction$6.cascade(CascadingAction.java:245) at org.hibernate.engine.Cascade.cascadeToOne(Cascade.java:268) at org.hibernate.engine.Cascade.cascadeAssociation(Cascade.java:216) at org.hibernate.engine.Cascade.cascadeProperty(Cascade.java:169) at org.hibernate.engine.Cascade.cascadeCollectionElements(Cascade.java:296) at org.hibernate.engine.Cascade.cascadeCollection(Cascade.java:242) at org.hibernate.engine.Cascade.cascadeAssociation(Cascade.java:219) at org.hibernate.engine.Cascade.cascadeProperty(Cascade.java:169) at org.hibernate.engine.Cascade.cascade(Cascade.java:130) at org.hibernate.event.def.AbstractSaveEventListener.cascadeAfterSave(AbstractSaveEventListener.java:456) at org.hibernate.event.def.DefaultMergeEventListener.entityIsTransient(DefaultMergeEventListener.java:194) at org.hibernate.event.def.DefaultMergeEventListener.onMerge(DefaultMergeEventListener.java:123) at org.hibernate.impl.SessionImpl.fireMerge(SessionImpl.java:687) at org.hibernate.impl.SessionImpl.merge(SessionImpl.java:669) at org.hibernate.engine.CascadingAction$6.cascade(CascadingAction.java:245) at org.hibernate.engine.Cascade.cascadeToOne(Cascade.java:268) at org.hibernate.engine.Cascade.cascadeAssociation(Cascade.java:216) at org.hibernate.engine.Cascade.cascadeProperty(Cascade.java:169) at org.hibernate.engine.Cascade.cascade(Cascade.java:130) at org.hibernate.event.def.DefaultMergeEventListener.cascadeOnMerge(DefaultMergeEventListener.java:407) at org.hibernate.event.def.DefaultMergeEventListener.entityIsPersistent(DefaultMergeEventListener.java:152) at org.hibernate.event.def.DefaultMergeEventListener.onMerge(DefaultMergeEventListener.java:126) at org.hibernate.event.def.DefaultMergeEventListener.onMerge(DefaultMergeEventListener.java:53) at org.hibernate.impl.SessionImpl.fireMerge(SessionImpl.java:677) at org.hibernate.impl.SessionImpl.merge(SessionImpl.java:661) at org.hibernate.impl.SessionImpl.merge(SessionImpl.java:665) at com.cegedim.oneup.events.srv.domain.Test.testMergeScheduleDetails(Test.java:67) at com.cegedim.oneup.events.srv.domain.Test.run(Test.java:83) at com.cegedim.oneup.events.srv.domain.Test.main(Test.java:126)