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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