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

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

** Changed in: nova
    Milestone: None => juno-rc1

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https://bugs.launchpad.net/bugs/1373230

Title:
  start/stop instance in EC2 API shouldn't return active/stopped status
  immediately

Status in OpenStack Compute (Nova):
  Fix Released

Bug description:
  Always see this error in the gate:

  http://logs.openstack.org/73/122873/1/gate/gate-tempest-dsvm-neutron-
  full/e5a2bf6/logs/screen-n-cpu.txt.gz?level=ERROR#_2014-09-21_05_18_23_709

  014-09-21 05:18:23.709 ERROR oslo.messaging.rpc.dispatcher [req-
  52e7fee5-65ee-4c4d-abcc-099b29352846 InstanceRunTest-2053569555
  InstanceRunTest-179702724] Exception during message handling:
  Unexpected task state: expecting [u'powering-off'] but the actual
  state is deleting

  Checking the EC2 API test in tempest,

      def test_run_stop_terminate_instance(self):
          # EC2 run, stop and terminate instance
          image_ami = self.ec2_client.get_image(self.images["ami"]
                                                ["image_id"])
          reservation = image_ami.run(kernel_id=self.images["aki"]["image_id"],
                                      ramdisk_id=self.images["ari"]["image_id"],
                                      instance_type=self.instance_type)
          rcuk = self.addResourceCleanUp(self.destroy_reservation, reservation)

          for instance in reservation.instances:
              LOG.info("state: %s", instance.state)
              if instance.state != "running":
                  self.assertInstanceStateWait(instance, "running")

          for instance in reservation.instances:
              instance.stop()
              LOG.info("state: %s", instance.state)
              if instance.state != "stopped":
                  self.assertInstanceStateWait(instance, "stopped")

          self._terminate_reservation(reservation, rcuk)

  The test is wait for instance become to stopped. But check the ec2 api code
  https://github.com/openstack/nova/blob/master/nova/api/ec2/cloud.py#L1075

  it always return stopped status immediately. Actually start/stop
  action is async call.

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