[hibernate-issues] [Hibernate-JIRA] Resolved: (HHH-2516) hibernate.use_identifier_rollback=true doesn't seem to be having any effect

hibernate.use_identifier_rollback=true doesn't seem to be having any effect --------------------------------------------------------------------------- Key: HHH-2516 URL: http://opensource.atlassian.com/projects/hibernate/browse/HHH-2516 Project: Hibernate3 Type: Bug

Versions: 3.2.2 Environment: Tested with Hibernate 3.2.0 GA and also 3.2.2 GA Core and Annotations+EntityManager 3.3.0 GA. MySQL Standard 5.0.27. Java 1.5.0_06 (on Mac OS X). Reporter: Darren Clarke Attachments: testfiles.zip As per post entitled "Unexpected 'detached entity passed to persist' error" in the "Hibernate Annotations, EntityManager, Search, Validator, Shards" forum, original posting by darrenclarke. I have a Person entity that has a 1:1 with an Address entity. Both have int PKs. Person has an additional unique column (accountNumber). When I persist() a new Person that has an accountNumber that causes a unique-constraint violation (deliberately for testing purposes), catch the resulting exception and perform a rollback(), the database state is correct, but the application's internal entity state is incorrect (person.getId()==0, but person.getAddress().getId() is not 0, i.e. the PK value has not been rolled back). Emmanuel suggested using hibernate.use_identifier_rollback=true, but that has made no difference. The attached files replicate the problem (note I haven't performed proper ThreadLocal-based EntityManager creation and the like, it's just a bare-bones standalone example to replicate the problem). Running Main and then stepping through the stdout reveals the following: [stdout] Creating person 1 ... [stdout] Persisting person 1 ... [stdout] Prior to merge/persist, person.getId()=0, person.getAddress().getId()=0 [stdout] merge/persist succeeded. [stdout] Creating person 2 (accountNumber is the same as person 1's) ... [stdout] Persisting person 2 ... [stdout] Prior to merge/persist, person.getId()=0, person.getAddress().getId()=0 [stdout] Prior to rollback, person.getId()=0, person.getAddress().getId()=2 [stdout] After rollback, person.getId()=0, person.getAddress().getId()=2 [stdout] Creation of new person failed due to duplicate account number (1) - retrying with different account number (2, retry# 1) ... [stdout] Prior to merge/persist, person.getId()=0, person.getAddress().getId()=2 [stdout] Prior to rollback, person.getId()=0, person.getAddress().getId()=2 [stdout] After rollback, person.getId()=0, person.getAddress().getId()=2 [stdout] Exception whilst persisting person 2: java.lang.Exception: Unable to save person [snip] Caused by: javax.persistence.PersistenceException: org.hibernate.PersistentObjectException: detached entity passed to persist: testapp.domain.Address [snip] I.e. the first persist is fine. The second persist (with unique-constraint violation) fails, but the address ID isn't reset after the rollback. Therefore when the second persist is retried with a valid accountNumber, the persist fails again as it believes an existing but detached address is referenced.