[hibernate-issues] [Hibernate-JIRA] Created: (HHH-5166) Inconsistent session state with merge/evict on cascade="all" association

[Alexandre FRADIN (JIRA)]

Inconsistent session state with merge/evict on cascade="all" association
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                 Key: HHH-5166
                 URL: http://opensource.atlassian.com/projects/hibernate/browse/HHH-5166
             Project: Hibernate Core
          Issue Type: Bug
          Components: core
    Affects Versions: 3.5.1, 3.3.2
         Environment: Reproducted on :

Hibernate-core 3.3.2 and 3.5.1-Final
DB2 and HSQL DB
with annotation and classic hbm mapping
            Reporter: Alexandre FRADIN
            Priority: Critical
         Attachments: hibernate-test-merge-evict-cascade-all.zip

My apologies for my English.

I have entities User and Role  with a many-to-many association mapped with cascade="all". So merge and evict operations on User should be applied to this association. 

When I do the following : 
1) create user u existing in DB
2) add a new Role r to this user (this Role don't exists in DB)
3) merge u 
4) evict the instance returned by the merge operation
5) use the same session for any operation
6) commit the session

I get this exception : "org.hibernate.AssertionFailure: possible nonthreadsafe access to session".

There is no thread issue. I think this is a standard way to use merge and evict operations.
I think that merge and evict operations used on modified entities leave the session in an inconsistent state.

See unit test wich reproduct this bug.

Does a workaround exist for this bug?

Regards.

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