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[Thierry Carrez <thierry.carrez+lp@xxxxxxxxx>]

** Changed in: nova
       Status: Fix Committed => Fix Released

** Changed in: nova
    Milestone: None => kilo-1

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https://bugs.launchpad.net/bugs/1403230

Title:
  GET server API does not handle invalid sort keys or directions
  gracefully

Status in OpenStack Compute (Nova):
  Fix Released

Bug description:
  If an invalid sort key or sort direction is given the REST API returns
  an error code 500 with the "The server has either erred or is
  incapable of performing the requested operation." message.

  This is occurring because the exceptions raised in
  oslo.db.sqlalchemy.utils.paginate_query are not caught and handled in
  nova.

  Exception raised here:
  https://github.com/openstack/oslo.db/blob/master/oslo/db/sqlalchemy/utils.py#L147
  https://github.com/openstack/oslo.db/blob/master/oslo/db/sqlalchemy/utils.py#L152

  The error raised in this scenario should be more specific.

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