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fix registry._setup_database.lock remove issue and rollback the session after UNIQUE constraint failed exception #917

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fix registry._setup_database.lock remove issue and rollback the session after UNIQUE constraint failed exception #917

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Commits on Jan 29, 2015

  1. fix registry._setup_database.lock remove issue 

    It will try to remove non-existing registry._setup_database.lock
when search_backend setting to sqlalchemy

Signed-off-by: Harrison Feng <[email protected]>
    @harrisonfeng
    harrisonfeng committed Jan 29, 2015
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  2. rollback the session after UNIQUE constraint failed exception 

    Here is the error message:
InvalidRequestError: This Session's transaction has been rolled
back due to a previous exception during flush. To begin a new
transaction with this Session, first issue Session.rollback().
Original exception was: (IntegrityError) UNIQUE constraint failed:
version.id u'INSERT INTO version (id) VALUES (?)' (1,)

Signed-off-by: Harrison Feng <[email protected]>
    @harrisonfeng
    harrisonfeng committed Jan 29, 2015
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