Hi, 

I've updated the original pull request 
(https://github.com/hibernate/hibernate-core/pull/118) to address the Map 
sizing issue. I've also removed a few debug log statements which could provoke 
a NPE.

I've also done the 4.0 port and added a new pull request for the current master 
(https://github.com/hibernate/hibernate-core/pull/132) .

Regards,

Erik-Berndt Scheper

________________________________________
Van: hibernate-dev-boun...@lists.jboss.org 
[hibernate-dev-boun...@lists.jboss.org] namens Steve Ebersole 
[st...@hibernate.org]
Verzonden: vrijdag 8 juli 2011 17:59
Aan: hibernate-dev@lists.jboss.org
Onderwerp: Re: [hibernate-dev] Patch for HHH-6361 / HHH-6349 : Envers loses 
audit information due to a Hibernate core bug

Looks good.  I added a few minor comments.  I'd like to see the Map
sizing thing addressed and the 4.0 port done, but I have no problems
with these changes.

On Fri 08 Jul 2011 07:32:25 AM CDT, Adam Warski wrote:
> As Eric wrote this fix is needed to fix an Envers issue (HHH-6349), however I 
> don't feel competent to review the patch for hibernate-core.
> So maybe someone else could try? :)
>
> Thanks,
> Adam
>
> On Jul 4, 2011, at 3:20 PM, Scheper, Erik-Berndt wrote:
>
>> Hi,
>> I'd like someone to review my proposed fix of HHH-6361 
>> (https://github.com/hibernate/hibernate-core/pull/117) for the 3.6 branch.
>>
>>>  From a Hibernate core perspective, this may seem like a minor issue, but 
>>> it is the cause of HHH-6349, where Envers forever loses the audit 
>>> information when objects were added to or removed from a collection. Since 
>>> there is no way to retrieve this information from the database at a later 
>>> moment, this is really bad from the Envers (auditing) perspective.
>>
>> The proposed fix causes both the provided testcase for HHH-6361 (the 
>> Hibernate core issue) and the testcase for HHH-6349 (the Envers issue) to 
>> pass by ensuring that after a merge() operation the snapshot value of the 
>> collection, as obtained by collectionEntry.getSnapshot(), corresponds with 
>> the database contents. This is a good thing, of course.
>>
>> However, apart from the possible performance implication (though I'm not 
>> sure if there's a remedy for this), I am a bit worried about the fact that I 
>> had to fix a unit test in the Hibernate testsuite 
>> (org.hibernate.test.manytomanyassociationclass.compositeid.ManyToManyAssociationClassCompositeIdTest)
>>  to make the 3.6 build succeed. As a rule, that's a bad sign.
>>
>> What happens is that after the patch this test crashes with an NPE in the 
>> hashCode() method of MembershipWithCompositeId.Id class. The reason of the 
>> NPE is that MembershipWithCompositeId now has a non-null "Id" property, with 
>> a null value of the userId and groupId properties. Even though it was easy 
>> to fix the test by overriding the deleteMembership()-method in 
>> ManyToManyAssociationClassCompositeIdTest by setting the "Id" property of 
>> MembershipWithCompositeId to null, this doesn't feel good to me.
>>
>> I'd really like to see a fix for HHH-6361 without these changes in 
>> ManyToManyAssociationClassCompositeIdTest, but I couldn't find one. Any help 
>> there would be appreciated of course.
>>
>> After an initial review, I'd be more than happy to provide a fix for the 
>> Hibernate 4.0.x series, which is also plagued by the same bug.
>>
>> Regards,
>> Erik-Berndt
>>
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