[hibernate-issues] [Hibernate-JIRA] Updated: (HHH-5833) Insertion failure of a second entity in 1-N relationship when using PROPERTY access instead of FIELD access

[Cyrille Charron (JIRA)]

     [ http://opensource.atlassian.com/projects/hibernate/browse/HHH-5833?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Cyrille Charron updated HHH-5833:
---------------------------------

    Attachment: Hibernate-bug-stdout.txt

And also a copy of the console stdout.

> Insertion failure of a second entity in 1-N relationship when using PROPERTY access instead of FIELD access
> -----------------------------------------------------------------------------------------------------------
>
>                 Key: HHH-5833
>                 URL: http://opensource.atlassian.com/projects/hibernate/browse/HHH-5833
>             Project: Hibernate Core
>          Issue Type: Bug
>          Components: core
>    Affects Versions: 3.6.1
>         Environment: Windows XP, JUnit test under Eclipse with HSQLDB.
>            Reporter: Cyrille Charron
>         Attachments: FamilyModel.zip, Hibernate-bug-stdout.txt, Hibernate-bug.txt, HibernateTest.zip
>
>
> While testing JBossCache, i have stumbled onto an apparent bug of Hibernate, 
> which throws a LazyInitializationException
> on a 1-N bi-directional relation between an entity Address 
> and two entities Person.
> NB: there's no bug when using OpenJPA.
> I have copied an extract of my java code 
> and the stack trace with a breakpoint on the exception 
> at line 366 into AbstractPersistentCollection.java 
> at the end of this issue report.
> If i am right, the bug arises because Hibernate tries to initialize 
> a collection which is already in the state of initialization.
> This bug appears when i link 2 Person entities to the same Address entity
> via 1-N bi-directional relation, and if the Person's setter updates 
> the 2 sides of this relation-ship by calling itself the Address's setter 
> (this "helper" code in entities was to be sure
> that the relation is updated on both sides, whoever is the owner).
> In my example, this collection is the "inhabitants" attribute 
> of my entity Address, in which i try to add a second entity Person,
> which has an attribute "address" pointing on the entity Address.
> Here is the "helper" code of the Person's setter :
> {code}
>     public boolean setAddress(Address address) {
>         boolean done = false;
>         if (this.address != address) {
>             if (this.address != null) this.address.remInhabitant(this);
>             this.address = address;
>             if (this.address != null) this.address.addInhabitant(this);
>             done = true;
>         }
>         return done;
>     }
> {code}
> My Stateless Session Bean had only to update one side of the relation :
> {code}
>     @TransactionAttribute(TransactionAttributeType.REQUIRED)
>     public void setAddressForPerson(int personId, int addressId) {
>         Address address = findAddress(addressId);
>         Person person = findPerson(personId);
>         ...
>         person.setAddress(address);
>     }
> {code}
> In the stack trace we see that :
>   we call Person.setAddress(Address) on my SECOND entity Person
>   which calls PersistentSet.size() on Address's collection
>   which calls PersistentSet(AbstractPersistentCollection).initialize(boolean)
>   which calls TwoPhaseLoad.initializeEntity
>   which calls PojoEntityTuplizer.setPropertyValues
>   which calls Person.setAddress(Address) on my FIRST entity Person
>   which calls PersistentSet.size() on Address's collection
>   which calls PersistentSet(AbstractPersistentCollection).initialize(boolean)
>   which throws the LazyInitializationException
> as if the relation between my FIRST entity Person and entity Address 
> has not finished its initialization.
> This bug DISAPPEARS if i delete the "helper" code from my entity Person :
> {code}
>     public boolean setAddress(Address address) {
>         this.address = address;
>         return true;
>     }
> {code}
> and if i update manually the both sides of the relation in my Session Bean :
> {code}
>     @TransactionAttribute(TransactionAttributeType.REQUIRED)
>     public void setAddressForPerson(int personId, int addressId) {
>         Address address = findAddress(addressId);
>         Person person = findPerson(personId);
>         ...
>         if (person.getAddress() != null) person.getAddress().remInhabitant(person);
>         if (address != null) address.addInhabitant(person);
>         person.setAddress(address);
>     }
> {code}
> I join 3 files :
>   the model project (entities Person, Address and Family)
>   the test project (Bean and JUnit)
>   a resume of source code and the stack trace with some variables values.

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