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[Slawek Kaplonski <1819125@xxxxxxxxxxxxxxxxxx>]

Public bug reported:

Fullstack test
neutron.tests.fullstack.test_qos.TestMinBwQoSOvs.test_min_bw_qos_policy_rule_lifecycle
is often failing.

Stack trace:

ft1.2: neutron.tests.fullstack.test_qos.TestMinBwQoSOvs.test_min_bw_qos_policy_rule_lifecycle(egress,openflow-cli)_StringException: Traceback (most recent call last):
  File "/opt/stack/new/neutron/neutron/common/utils.py", line 685, in wait_until_true
    eventlet.sleep(sleep)
  File "/opt/stack/new/neutron/.tox/dsvm-fullstack/lib/python3.5/site-packages/eventlet/greenthread.py", line 36, in sleep
    hub.switch()
  File "/opt/stack/new/neutron/.tox/dsvm-fullstack/lib/python3.5/site-packages/eventlet/hubs/hub.py", line 297, in switch
    return self.greenlet.switch()
eventlet.timeout.Timeout: 60 seconds

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "/opt/stack/new/neutron/neutron/tests/base.py", line 174, in func
    return f(self, *args, **kwargs)
  File "/opt/stack/new/neutron/neutron/tests/fullstack/test_qos.py", line 655, in test_min_bw_qos_policy_rule_lifecycle
    self._wait_for_min_bw_rule_applied(vm, MIN_BANDWIDTH, self.direction)
  File "/opt/stack/new/neutron/neutron/tests/fullstack/test_qos.py", line 675, in _wait_for_min_bw_rule_applied
    lambda: vm.bridge.get_egress_min_bw_for_port(
  File "/opt/stack/new/neutron/neutron/common/utils.py", line 690, in wait_until_true
    raise WaitTimeout(_("Timed out after %d seconds") % timeout)
neutron.common.utils.WaitTimeout: Timed out after 60 seconds


Example of failure: http://logs.openstack.org/83/574783/39/check/neutron-fullstack/76eb05d/logs/testr_results.html.gz

Logstash query:
http://logstash.openstack.org/#dashboard/file/logstash.json?query=message%3A%5C%22line%20655%2C%20in%20test_min_bw_qos_policy_rule_lifecycle%5C%22

** Affects: neutron
     Importance: Critical
         Status: Confirmed


** Tags: fullstack gate-failure qos

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https://bugs.launchpad.net/bugs/1819125

Title:
  Fullstack test test_min_bw_qos_policy_rule_lifecycle failing often

Status in neutron:
  Confirmed

Bug description:
  Fullstack test
  neutron.tests.fullstack.test_qos.TestMinBwQoSOvs.test_min_bw_qos_policy_rule_lifecycle
  is often failing.

  Stack trace:

  ft1.2: neutron.tests.fullstack.test_qos.TestMinBwQoSOvs.test_min_bw_qos_policy_rule_lifecycle(egress,openflow-cli)_StringException: Traceback (most recent call last):
    File "/opt/stack/new/neutron/neutron/common/utils.py", line 685, in wait_until_true
      eventlet.sleep(sleep)
    File "/opt/stack/new/neutron/.tox/dsvm-fullstack/lib/python3.5/site-packages/eventlet/greenthread.py", line 36, in sleep
      hub.switch()
    File "/opt/stack/new/neutron/.tox/dsvm-fullstack/lib/python3.5/site-packages/eventlet/hubs/hub.py", line 297, in switch
      return self.greenlet.switch()
  eventlet.timeout.Timeout: 60 seconds

  During handling of the above exception, another exception occurred:

  Traceback (most recent call last):
    File "/opt/stack/new/neutron/neutron/tests/base.py", line 174, in func
      return f(self, *args, **kwargs)
    File "/opt/stack/new/neutron/neutron/tests/fullstack/test_qos.py", line 655, in test_min_bw_qos_policy_rule_lifecycle
      self._wait_for_min_bw_rule_applied(vm, MIN_BANDWIDTH, self.direction)
    File "/opt/stack/new/neutron/neutron/tests/fullstack/test_qos.py", line 675, in _wait_for_min_bw_rule_applied
      lambda: vm.bridge.get_egress_min_bw_for_port(
    File "/opt/stack/new/neutron/neutron/common/utils.py", line 690, in wait_until_true
      raise WaitTimeout(_("Timed out after %d seconds") % timeout)
  neutron.common.utils.WaitTimeout: Timed out after 60 seconds

  
  Example of failure: http://logs.openstack.org/83/574783/39/check/neutron-fullstack/76eb05d/logs/testr_results.html.gz

  Logstash query:
  http://logstash.openstack.org/#dashboard/file/logstash.json?query=message%3A%5C%22line%20655%2C%20in%20test_min_bw_qos_policy_rule_lifecycle%5C%22

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