[hibernate-issues] [Hibernate-JIRA] Created: (HHH-5280) "java.lang.IllegalArgumentException: object is not an instance of declaring class" when persisting a object graph containing the same transient objetc twice.

[Benjamin Lerman (JIRA)]

"java.lang.IllegalArgumentException: object is not an instance of declaring class" when persisting a object graph containing the same transient objetc twice.
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                 Key: HHH-5280
                 URL: http://opensource.atlassian.com/projects/hibernate/browse/HHH-5280
             Project: Hibernate Core
          Issue Type: Bug
          Components: core
    Affects Versions: 3.5.2
         Environment: Hibernate 3.5.2
Db: All? (At least h2 and mysql)
            Reporter: Benjamin Lerman
            Priority: Critical
         Attachments: hibernate-multi-parent.tgz, test.entity.TestCreate.txt

 I attach a maven project showing the bug.

 I have 3 classes, A, B, C with

 C have a one-to-many unidirectional relation to B and A.
 B have a one-to-many unidirectional relation to A.

 Those relations are mapped by foreign keys.

 The cascading properties for those relations are all save-update,persist

 For each of those relations, the inverse cardinality is 1 (which means A must be associated with a B and a C, and B must be associated with a C).

 I create an instance of C that I associate to an instance of B and an instance of A, and I associate the instance of B with the instance of A.

 I then try to save C, and I get the attached exception.

 For what I understood the problem is with the method StatefulPersistenceContext.getOwnerId: this method use a cache to retrieve the parent of the instance of A, but because A has 2 different parents (the instance of B and the instance of C), it does not retrieve the right one and try to call a method on the wrong entity.

 


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