[EJB 3.0] - Re: difference between @Version and EntityManager.lock - jboss-user

Saturday, 9 June 2007

The OptimisticLockException indicates that the second client has a stale version of the
entity, i.e. it won't be updating the latest version.

As far as I know, using the EntityManager.lock method will force the version to be
incremented, whether or not you actually changed the entity.

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