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[Brian Rosmaita <rosmaita.fossdev@xxxxxxxxx>]

** Also affects: glance/queens
   Importance: Undecided
       Status: New

** Changed in: glance/queens
    Milestone: None => queens-stable-2

** Changed in: glance/queens
   Importance: Undecided => High

** Changed in: glance/queens
       Status: New => Triaged

** Changed in: glance/queens
     Assignee: (unassigned) => Brian Rosmaita (brian-rosmaita)

** Tags removed: queens-backport-potential

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https://bugs.launchpad.net/bugs/1726213

Title:
  KNOWN_EXCEPTIONS don't include all possible exceptions

Status in Glance:
  In Progress
Status in Glance queens series:
  Triaged

Bug description:
  oslo.config may raise a ConfigFileValueError when run
  server.start(***) in `glance/cmd/api.py`, which is a subclass of
  ValueError so it can be caught using KNOWN_EXCEPTIONS.

  But ConfigFileValueError is not in the KNOWN_EXCEPTIONS, use index
  method of KNOWN_EXCEPTIONS will raise an ValueError, which is
  unexpected:

  ```
  2017-10-22 22:47:46.460 94 CRITICAL glance [-] Unhandled error: ValueError: tuple.index(x): x not in tuple
  2017-10-22 22:47:46.460 94 ERROR glance Traceback (most recent call last):
  2017-10-22 22:47:46.460 94 ERROR glance   File "/var/lib/kolla/venv/bin/glance-api", line 10, in <module>
  2017-10-22 22:47:46.460 94 ERROR glance     sys.exit(main())
  2017-10-22 22:47:46.460 94 ERROR glance   File "/var/lib/kolla/venv/lib/python2.7/site-packages/glance/cmd/api.py", line 92, in main
  2017-10-22 22:47:46.460 94 ERROR glance     fail(e)
  2017-10-22 22:47:46.460 94 ERROR glance   File "/var/lib/kolla/venv/lib/python2.7/site-packages/glance/cmd/api.py", line 65, in fail
  2017-10-22 22:47:46.460 94 ERROR glance     return_code = KNOWN_EXCEPTIONS.index(type(e)) + 1
  2017-10-22 22:47:46.460 94 ERROR glance ValueError: tuple.index(x): x not in tuple
  2017-10-22 22:47:46.460 94 ERROR glance

  ```

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