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juergen.zimmermann
 Post subject: EM3.2CR2: merge fails with detached obj in 1:1 relationship
PostPosted: Mon Sep 25, 2006 11:24 pm 
Regular
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Joined: Tue May 24, 2005 9:06 am
Posts: 64
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 appended stack trace.

When I enforce loading the referenced (and also detached) object, e.g. by em.find(), then there is no problem in invoking merge() afterwards. Any hint is appreciated.

Code:
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)
at org.hibernate.ejb.AbstractEntityManagerImpl.merge(AbstractEntityManagerImpl.java:227)
at org.jboss.ejb3.entity.TransactionScopedEntityManager.merge(TransactionScopedEntityManager.java:181)   
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florian79
 Post subject: Re: EM3.2CR2: merge fails with detached obj in 1:1 relations
PostPosted: Thu Sep 28, 2006 10:23 am 
Beginner
Beginner

Joined: Thu Sep 21, 2006 2:49 am
Posts: 24
I got a similar problem with the same configuration:
Code:
16:18:31,619 ERROR [STDERR] java.lang.ClassCastException: org.jboss.ejb3.entity.TransactionScopedEntityManager
16:18:31,629 ERROR [STDERR]    at $Proxy86.getEntityManager(Unknown Source)
16:18:31,629 ERROR [STDERR]    at com.dooris.util.struts.DoorISActionServlet.init(DoorISActionServlet.java:125)
16:18:31,629 ERROR [STDERR]    at javax.servlet.GenericServlet.init(GenericServlet.java:211)
16:18:31,629 ERROR [STDERR]    at org.apache.catalina.core.StandardWrapper.loadServlet(StandardWrapper.java:1105)
16:18:31,629 ERROR [STDERR]    at org.apache.catalina.core.StandardWrapper.load(StandardWrapper.java:932)
16:18:31,629 ERROR [STDERR]    at org.apache.catalina.core.StandardContext.loadOnStartup(StandardContext.java:3917)
16:18:31,629 ERROR [STDERR]    at org.apache.catalina.core.StandardContext.start(StandardContext.java:4201)

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http://www.dooris.de

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emmanuel
 Post subject:
PostPosted: Thu Sep 28, 2006 11:11 am 
Hibernate Team
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Joined: Sun Sep 14, 2003 3:54 am
Posts: 7256
Location: Paris, France
was it working with the previous version?
A simple runnable tets case will be needed then

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juergen.zimmermann
 Post subject:
PostPosted: Thu Sep 28, 2006 3:13 pm 
Regular
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Joined: Tue May 24, 2005 9:06 am
Posts: 64
It doesn't work with JBoss 4.0.4, too.

Testcase is provided at http://opensource.atlassian.com/project ... se/EJB-229
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emmanuel
 Post subject:
PostPosted: Fri Sep 29, 2006 3:22 pm 
Hibernate Team
Hibernate Team

Joined: Sun Sep 14, 2003 3:54 am
Posts: 7256
Location: Paris, France
I started to look at it, but your attached project is too hairy. I've tryied to reproduce with a some simple example, no luck so far.

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juergen.zimmermann
 Post subject:
PostPosted: Sat Sep 30, 2006 12:28 am 
Regular
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Joined: Tue May 24, 2005 9:06 am
Posts: 64
I'm out of office until Wednesday. Then I'll stepwise reduce it.
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juergen.zimmermann
 Post subject:
PostPosted: Thu Oct 05, 2006 10:27 am 
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Joined: Tue May 24, 2005 9:06 am
Posts: 64
I simplified the testcase. Just the 2 uploaded entity files Kunde.java and Betreuer.java are sufficient [together with the attached session bean file KundenverwaltungBean.java]

http://opensource.atlassian.com/project ... se/EJB-229

1) If I invoke merge() for a modified Kunde object, then it CRASHES.
2) If I invoke merge() for a modified Betreuer object, then EVERYTHING WORKS FINE.

The difference is
1) In Kunde.java [the crashing entity]
@OneToOne(mappedBy="kunde")
private Betreuer betreuer = null;
2) Betreuer.java
@OneToOne
@JoinColumn(name="kunde_fk")
private Kunde kunde = null;

Is there a problem due to the absence of @JoinColumn?
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