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

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

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https://bugs.launchpad.net/bugs/1258147

Title:
  nicira: tempest fail to create routers in parallel

Status in OpenStack Neutron (virtual network service):
  Fix Released

Bug description:
  when parallel tempest tests are enabled, the nicira plugin is not able to create routers and set the external gateway for them.
  Parallel operations indeed cause the usual eventlet/mysql deadlock in _update_router_gw_info.

  The root cause for the deadlock is that the nvp api client uses
  eventlet to dispatch requests.

  while a solution might be to rework the API client, an easier,
  backportable solution would be to specify the critical methods (ie:
  the ones which then result in nvp operations which might conflict with
  db operations) as synchronized.

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