[jboss-jira] [JBoss JIRA] Created: (HIBERNATE-104) useless stacktrace

[arne anka (JIRA)]

useless stacktrace
------------------

                 Key: HIBERNATE-104
                 URL: https://jira.jboss.org/jira/browse/HIBERNATE-104
             Project: Hibernate
          Issue Type: Bug
         Environment: jboss-4.2.2.GA, linux 32bit
            Reporter: arne anka
            Assignee: Steve Ebersole


when trying
entityManager.merge(myUser);
entityManager.flush();
i get a very long list of recurrent stacktraces. it boils down to two messages:

Caused by: org.hibernate.PropertyAccessException: IllegalArgumentException occurred calling getter of my.class.roleId
	at org.hibernate.property.BasicPropertyAccessor$BasicGetter.get(BasicPropertyAccessor.java:171)
	at org.hibernate.tuple.entity.AbstractEntityTuplizer.getIdentifier(AbstractEntityTuplizer.java:183)
	at org.hibernate.persister.entity.AbstractEntityPersister.getIdentifier(AbstractEntityPersister.java:3591)
	at org.hibernate.persister.entity.AbstractEntityPersister.isTransient(AbstractEntityPersister.java:3307)
	at org.hibernate.engine.ForeignKeys.isTransient(ForeignKeys.java:181)
	at org.hibernate.engine.ForeignKeys.getEntityIdentifierIfNotUnsaved(ForeignKeys.java:218)
	at org.hibernate.type.EntityType.getIdentifier(EntityType.java:397)
	at org.hibernate.type.EntityType.replace(EntityType.java:253)
	at org.hibernate.type.CollectionType.replaceElements(CollectionType.java:451)
	at org.hibernate.type.Collecti
14:46:07,362 INFO  [STDOUT] onType.replace(CollectionType.java:518)
	at org.hibernate.type.TypeFactory.replace(TypeFactory.java:482)
	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)
	... 74 more

and

Caused by: java.lang.IllegalArgumentException: java.lang.ClassCastException at 661744
	at sun.reflect.GeneratedMethodAccessor2266.invoke(Unknown Source)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
	at java.lang.reflect.Method.invoke(Method.java:585)
	at org.hibernate.property.BasicPropertyAccessor$BasicGetter.get(BasicPropertyAccessor.java:145)
	... 92 more


the property my.class.roleId is defined as Integer, setter and getter expect or return an Integer.
i can't see, what type hibernate expects as argument and i can't see in what type hibernate tries to cast.

- why does the stacktrace not mention the argument type hibernate expects?
- why does the stacktrace not mention in which type hibernate tries to cast?

with it's current level of null-information ist that _very_ long, confusing and time consuming stacktrace worse then useless.
i am completely unable to deduce any way to remedy a possible bug in my code or circumvent a possible bug in hibernate.

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