[hibernate-issues] [Hibernate-JIRA] Created: (HHH-2959) Using Map causes unaltered relationships in cache to be flushed

[Aaron Luchko (JIRA)]

Using Map causes unaltered relationships in cache to be flushed
---------------------------------------------------------------

                 Key: HHH-2959
                 URL: http://opensource.atlassian.com/projects/hibernate/browse/HHH-2959
             Project: Hibernate3
          Issue Type: Bug
          Components: core
    Affects Versions: 3.2.5
         Environment: hibernate-3.2.1, hibernate-3.2.5, hibernate-annotations-3.2.1, hibernate-annotations-3.3.0.GA, multiple databases
            Reporter: Aaron Luchko
         Attachments: hibMapBug.zip

I've found an issue with associations involving Maps.

Essentially we save a number of entities with associations involving Maps, then save all our changes and commit.

Once everything is saved and committed we start a new transaction and make a trivial change, we save the altered object and the relationship defined via the Map is recreated for every entity still in the cache. With a large cache this becomes a significant performance concern as we're performing O()N database operations every time we commit a transaction.

At the end when one would expect to see

Final Save
01:07:31,341 DEBUG org.hibernate.SQL:401 - update Foo set description=? where id=?

instead the output is

Final Save
01:07:31,341 DEBUG org.hibernate.SQL:401 - update Foo set description=? where id=?
01:07:31,345 DEBUG org.hibernate.SQL:401 - delete from Foo_Bar where Foo_id=?
01:07:31,349 DEBUG org.hibernate.SQL:401 - delete from Foo_Bar where Foo_id=?
01:07:31,351 DEBUG org.hibernate.SQL:401 - delete from Foo_Bar where Foo_id=?
01:07:31,353 DEBUG org.hibernate.SQL:401 - insert into Foo_Bar (Foo_id, mapkey, bars_id) values (?, ?, ?)
01:07:31,353 DEBUG org.hibernate.SQL:401 - insert into Foo_Bar (Foo_id, mapkey, bars_id) values (?, ?, ?)
01:07:31,353 DEBUG org.hibernate.SQL:401 - insert into Foo_Bar (Foo_id, mapkey, bars_id) values (?, ?, ?)


-- 
This message is automatically generated by JIRA.
-
If you think it was sent incorrectly contact one of the administrators: http://opensource.atlassian.com/projects/hibernate/secure/Administrators.jspa
-
For more information on JIRA, see: http://www.atlassian.com/software/jira