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    Problem solved. Please ignore the unit tests -...

    Problem solved.

    Please ignore the unit tests - the problem was something else.

    It was due to this:

    Oracle converts empty string to null but JPA doesn’t update entity cache correspondingly...
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    Problems with merging (JpaOptimisticLockingFailureException)

    I am using Roo 1.0.2.

    If I call merge() on an entity twice (for instance pressing save button twice in gui) I get a

    org.springframework.orm.jpa.JpaOptimisticLockingFailureException:...
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