[hibernate-issues] [Hibernate-JIRA] Created: (HHH-6718) Non-cascaded lazy association loaded during merge

[Reto Urfer (JIRA)]

Non-cascaded lazy association loaded during merge
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                 Key: HHH-6718
                 URL: http://opensource.atlassian.com/projects/hibernate/browse/HHH-6718
             Project: Hibernate Core
          Issue Type: Bug
          Components: core
    Affects Versions: 3.6.7, 3.6.6, 3.6.5
         Environment: Derby & Oracle database
            Reporter: Reto Urfer
         Attachments: bug.zip

Scenario:
- Class A, B and C, no secondary cache
- OneToOne association between A and B, not cascaded, eagerly loaded
- OneToOne association between B and C, all cascaded, lazy loaded

If I retrieve A by id, only A and the associated B are loaded, which is completly what i expected.

If I modify A when the instance is detached and later merge it again then A and the associated B are loaded but together with B also C is loaded within a left outer join.

This results in very heavy performance impacts within our application.

I have added a zip file with a simple test case to reproduce the problem


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