[hibernate-issues] [Hibernate-JIRA] Resolved: (EJB-229) merge fails with detached obj in 1:1 relationship

merge fails with detached obj in 1:1 relationship ------------------------------------------------- Key: EJB-229 URL: http://opensource.atlassian.com/projects/hibernate/browse/EJB-229 Project: Hibernate Entity Manager Type: Bug

Components: EntityManager Versions: 3.2.0.cr2 Environment: JBoss 4.0.5CR1, Hibernate 3.2.0CR4, Hibernate EntityManager 3.2.0CR2, PostgreSQL 8.1.4, JDK 1.5.0_08 Reporter: Juergen Zimmermann Fix For: 3.2.1 Attachments: Betreuer.java, Kunde.java, KundenverwaltungBean.java, merge.zip I'm using Hibernate EntityManager 3.2CR2 inside JBoss EJB3 CR9. I'm invoking em.merge() with a detached object. The detached object has a 1:1 relationship with another detached object. The fetch strategy is the default strategy for 1:1 relationships. However, merge() fails and yields the stack trace below. When I enforce loading the referenced (and also detached) object, e.g. by em.find(), then there is no problem in invoking merge() afterwards. javax.ejb.EJBException: java.lang.ClassCastException: de.hska.kundenverwaltung.db.Firmenkunde at org.jboss.ejb3.tx.Ejb3TxPolicy.handleExceptionInOurTx(Ejb3TxPolicy.java:69) at org.jboss.aspects.tx.TxPolicy.invokeInOurTx(TxPolicy.java:83) at org.jboss.aspects.tx.TxInterceptor$Required.invoke(TxInterceptor.java:197) at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:101) at org.jboss.aspects.tx.TxPropagationInterceptor.invoke(TxPropagationInterceptor.java:76) at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:101) at org.jboss.ejb3.stateless.StatelessInstanceInterceptor.invoke(StatelessInstanceInterceptor.java:62) at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:101) at org.jboss.aspects.security.RoleBasedAuthorizationInterceptor.invoke(RoleBasedAuthorizationInterceptor.java:167) at org.jboss.ejb3.security.RoleBasedAuthorizationInterceptor.invoke(RoleBasedAuthorizationInterceptor.java:108) at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:101) at org.jboss.aspects.security.AuthenticationInterceptor.invoke(AuthenticationInterceptor.java:78) at org.jboss.ejb3.security.Ejb3AuthenticationInterceptor.invoke(Ejb3AuthenticationInterceptor.java:131) at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:101) at org.jboss.ejb3.ENCPropagationInterceptor.invoke(ENCPropagationInterceptor.java:47) at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:101) at org.jboss.ejb3.asynchronous.AsynchronousInterceptor.invoke(AsynchronousInterceptor.java:106) at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:101) at org.jboss.ejb3.stateless.StatelessContainer.dynamicInvoke(StatelessContainer.java:263) at org.jboss.aop.Dispatcher.invoke(Dispatcher.java:106) at org.jboss.aspects.remoting.AOPRemotingInvocationHandler.invoke(AOPRemotingInvocationHandler.java:82) at org.jboss.remoting.ServerInvoker.invoke(ServerInvoker.java:828) at org.jboss.remoting.ServerInvoker.invoke(ServerInvoker.java:681) at org.jboss.remoting.transport.socket.ServerThread.processInvocation(ServerThread.java:358) at org.jboss.remoting.transport.socket.ServerThread.dorun(ServerThread.java:412) at org.jboss.remoting.transport.socket.ServerThread.run(ServerThread.java:239) Caused by: java.lang.ClassCastException: de.hska.kundenverwaltung.db.Firmenkunde at org.hibernate.type.LongType.set(LongType.java:42) at org.hibernate.type.NullableType.nullSafeSet(NullableType.java:83) at org.hibernate.type.NullableType.nullSafeSet(NullableType.java:65) at org.hibernate.loader.Loader.bindPositionalParameters(Loader.java:1513) at org.hibernate.loader.Loader.prepareQueryStatement(Loader.java:1575) at org.hibernate.loader.Loader.doQuery(Loader.java:661) at org.hibernate.loader.Loader.doQueryAndInitializeNonLazyCollections(Loader.java:224) at org.hibernate.loader.Loader.loadEntity(Loader.java:1784) at org.hibernate.loader.entity.AbstractEntityLoader.load(AbstractEntityLoader.java:48) at org.hibernate.loader.entity.EntityLoader.loadByUniqueKey(EntityLoader.java:85) at org.hibernate.persister.entity.AbstractEntityPersister.loadByUniqueKey(AbstractEntityPersister.java:1581) at org.hibernate.type.EntityType.loadByUniqueKey(EntityType.java:365) at org.hibernate.type.EntityType.resolve(EntityType.java:306) at org.hibernate.type.EntityType.replace(EntityType.java:207) at org.hibernate.type.TypeFactory.replace(TypeFactory.java:437) at org.hibernate.event.def.DefaultMergeEventListener.copyValues(DefaultMergeEventListener.java:340) at org.hibernate.event.def.DefaultMergeEventListener.entityIsDetached(DefaultMergeEventListener.java:267) at org.hibernate.event.def.DefaultMergeEventListener.onMerge(DefaultMergeEventListener.java:120) 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)