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

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.... - For more information on JIRA, see: http://www.atlassian.com/software/jira