OptimisticLockException after lock, refresh, merge in a transaction in Hibernate

Solution Verified - Updated -

Environment

  • Red Hat JBoss Enterprise Application Platform (EAP) 7
  • Hibernate 5

Issue

The following steps involving update of an entity with a @Version property in a transaction result in an OptimisticLockException during commit.

  1. Employee e = entityManager.find(Employee.class, THE_KEY_HERE);
  2. entityManager.lock(e, LockModeType.READ);
  3. entityManager.refresh(e);
  4. Update some property of the entity (and merge)
  5. Commit
... javax.persistence.OptimisticLockException: Newer version [2] of entity [[support.hibernate.entity.Employee#THE_KEY_HERE]] found in database
    at org.hibernate.internal.ExceptionConverterImpl.wrapLockException(ExceptionConverterImpl.java:247)
    at org.hibernate.internal.ExceptionConverterImpl.convert(ExceptionConverterImpl.java:103)
    at org.hibernate.internal.ExceptionConverterImpl.convert(ExceptionConverterImpl.java:181)
    at org.hibernate.internal.ExceptionConverterImpl.convertCommitException(ExceptionConverterImpl.java:60)
    ... 29 more
Caused by: org.hibernate.OptimisticLockException: Newer version [2] of entity [[support.hibernate.entity.Employee#THE_KEY_HERE]] found in database
    at org.hibernate.action.internal.EntityVerifyVersionProcess.doBeforeTransactionCompletion(EntityVerifyVersionProcess.java:51)
    at org.hibernate.engine.spi.ActionQueue$BeforeTransactionCompletionProcessQueue.beforeTransactionCompletion(ActionQueue.java:954)
    at org.hibernate.engine.spi.ActionQueue.beforeTransactionCompletion(ActionQueue.java:525)
    at org.hibernate.internal.SessionImpl.beforeTransactionCompletion(SessionImpl.java:2487)
    at org.hibernate.engine.jdbc.internal.JdbcCoordinatorImpl.beforeTransactionCompletion(JdbcCoordinatorImpl.java:473)
    at org.hibernate.resource.transaction.backend.jdbc.internal.JdbcResourceLocalTransactionCoordinatorImpl.beforeCompletionCallback(JdbcResourceLocalTransactionCoordinatorImpl.java:178)
    at org.hibernate.resource.transaction.backend.jdbc.internal.JdbcResourceLocalTransactionCoordinatorImpl.access$300(JdbcResourceLocalTransactionCoordinatorImpl.java:39)
    at org.hibernate.resource.transaction.backend.jdbc.internal.JdbcResourceLocalTransactionCoordinatorImpl$TransactionDriverControlImpl.commit(JdbcResourceLocalTransactionCoordinatorImpl.java:271)
    at org.hibernate.engine.transaction.internal.TransactionImpl.commit(TransactionImpl.java:104)
    ...

Resolution

This issue1 is resolved in EAP 7.2 cumulative patch (CP) 4 and later releases. Production systems should use the latest available cumulative patch.

One of the following may provide a workaround with older patch levels until the system can be patched:

  • Merge lock and refresh using entityManager.refresh(e, LockModeType.READ);
  • Reverse the order of lock/refresh (i.e. peform refresh before lock)

  1. JBEAP-17169 ↩︎

Root Cause

This is a known defect (HHH-13492).

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