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[Matt Riedemann <mriedem.os@xxxxxxxxx>]

** Also affects: nova/pike
   Importance: Undecided
       Status: New

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https://bugs.launchpad.net/bugs/1727719

Title:
  Placement: resource provider can't be deleted if there is trait
  associated with it

Status in OpenStack Compute (nova):
  In Progress
Status in OpenStack Compute (nova) pike series:
  New

Bug description:
  nova: 6d61c61a32

  To reproduce:
  1. Create a new RP
  2. Associate a trait with it.
  3. Try to delete the RP.

  Error:
  Response: 
  {"computeFault": {"message": "The server has either erred or is incapable of performing the requested operation.", "code": 500}}

  (Pdb) __exception__
  (<class 'oslo_db.exception.DBReferenceError'>, DBReferenceError(u"(pymysql.err.IntegrityError) (1451, u'Cannot delete or update a parent row: a foreign key constraint fails (`nova_api`.`resource_provider_traits`, CONSTRAINT `resource_provider_traits_ibfk_1` FOREIGN KEY (`resource_provider_id`) REFERENCES `resource_providers` (`id`))') [SQL: u'DELETE FROM resource_providers WHERE resource_providers.id = %(id_1)s'] [parameters: {u'id_1': 17}]",))

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