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[Bug 1948963] [NEW] runnig test_db_version_alembic unit test only with other unit.db tests causes: oslo_db.sqlalchemy.enginefacade.AlreadyStartedError: this TransactionFactory is already started

 

Public bug reported:

If you run

  tox -e py38 nova.tests.unit.db

then some unit.db tests will fail with

  oslo_db.sqlalchemy.enginefacade.AlreadyStartedError: this
TransactionFactory is already started

The exact failed tests and the amount of them depending on the number of
executors and some random seed.

** Affects: nova
     Importance: Low
     Assignee: Balazs Gibizer (balazs-gibizer)
         Status: In Progress


** Tags: testing

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https://bugs.launchpad.net/bugs/1948963

Title:
  runnig test_db_version_alembic unit test only with other unit.db tests
  causes: oslo_db.sqlalchemy.enginefacade.AlreadyStartedError:   this
  TransactionFactory is already started

Status in OpenStack Compute (nova):
  In Progress

Bug description:
  If you run

    tox -e py38 nova.tests.unit.db

  then some unit.db tests will fail with

    oslo_db.sqlalchemy.enginefacade.AlreadyStartedError: this
  TransactionFactory is already started

  The exact failed tests and the amount of them depending on the number
  of executors and some random seed.

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