Difference in PESSIMISTIC_WRITE and UPGRADE lock modes in Hibernate
Issue
- A legacy application is using LockMode.UPGRADE with Session.get(...) to apply a pessimistic lock to an entity row.
UPGRADEis marked deprecated so the lock mode was changed to PESSIMISTIC_WRITE during migration from an older Hibernate release.- In cases where the entity row does not already exist in the database (e.g.
persist(...)has been called but the pending insert has not yet been flushed to the database), use ofPESSIMISTIC_WRITEfails with an exception. If the entity exists, a lock is obtained as expected.
Environment
- Red Hat JBoss Enterprise Application Platform (EAP)
- 7
- 6
- Hibernate
- 5
- 4
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