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[yatin <2070390@xxxxxxxxxxxxxxxxxx>]

Public bug reported:

Fails like:-
ft1.1: neutron.tests.fullstack.test_connectivity.TestUninterruptedConnectivityOnL2AgentRestartOvs.test_l2_agent_restart(OVS,Flat network)testtools.testresult.real._StringException: Traceback (most recent call last):
  File "/home/zuul/src/opendev.org/openstack/neutron/neutron/tests/base.py", line 178, in func
    return f(self, *args, **kwargs)
  File "/home/zuul/src/opendev.org/openstack/neutron/neutron/tests/fullstack/test_connectivity.py", line 179, in test_l2_agent_restart
    self._test_l2_agent_restart(agent_restart_timeout)
  File "/home/zuul/src/opendev.org/openstack/neutron/neutron/tests/fullstack/test_connectivity.py", line 162, in _test_l2_agent_restart
    self._assert_ping_during_agents_restart(
  File "/home/zuul/src/opendev.org/openstack/neutron/neutron/tests/fullstack/base.py", line 135, in _assert_ping_during_agents_restart
    self.assertTrue(all(r.done() for r in restarts))
  File "/usr/lib/python3.10/unittest/case.py", line 687, in assertTrue
    raise self.failureException(msg)
AssertionError: False is not true

Sample failures:-
 - https://86ddc5b3525cc8a57bd5-84709aab2060acc1565f07c661aff448.ssl.cf1.rackcdn.com/922119/1/check/neutron-fullstack-with-uwsgi/4213115/testr_results.html

 -
https://storage.gra.cloud.ovh.net/v1/AUTH_dcaab5e32b234d56b626f72581e3644c/zuul_opendev_logs_e5d/888098/15/check/neutron-
fullstack-with-uwsgi/e5d8147/testr_results.html

 -
https://storage.bhs.cloud.ovh.net/v1/AUTH_dcaab5e32b234d56b626f72581e3644c/zuul_opendev_logs_6c6/922470/1/check/neutron-
fullstack-with-uwsgi/6c63681/testr_results.html

 -
https://storage.gra.cloud.ovh.net/v1/AUTH_dcaab5e32b234d56b626f72581e3644c/zuul_opendev_logs_522/periodic/opendev.org/openstack/neutron/master/neutron-
fullstack/52235b5/testr_results.html

 -
https://storage.gra.cloud.ovh.net/v1/AUTH_dcaab5e32b234d56b626f72581e3644c/zuul_opendev_logs_14b/922074/4/check/neutron-
fullstack-with-uwsgi/14bece8/testr_results.html


Triggered by https://review.opendev.org/c/openstack/neutron/+/919834

** Affects: neutron
     Importance: Critical
         Status: New


** Tags: fullstack gate-failure

** Changed in: neutron
   Importance: Undecided => Critical

** Tags added: fullstack gate-failure

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https://bugs.launchpad.net/bugs/2070390

Title:
  [fullstack][dalmatian] Random failures in test_l2_agent_restart

Status in neutron:
  New

Bug description:
  Fails like:-
  ft1.1: neutron.tests.fullstack.test_connectivity.TestUninterruptedConnectivityOnL2AgentRestartOvs.test_l2_agent_restart(OVS,Flat network)testtools.testresult.real._StringException: Traceback (most recent call last):
    File "/home/zuul/src/opendev.org/openstack/neutron/neutron/tests/base.py", line 178, in func
      return f(self, *args, **kwargs)
    File "/home/zuul/src/opendev.org/openstack/neutron/neutron/tests/fullstack/test_connectivity.py", line 179, in test_l2_agent_restart
      self._test_l2_agent_restart(agent_restart_timeout)
    File "/home/zuul/src/opendev.org/openstack/neutron/neutron/tests/fullstack/test_connectivity.py", line 162, in _test_l2_agent_restart
      self._assert_ping_during_agents_restart(
    File "/home/zuul/src/opendev.org/openstack/neutron/neutron/tests/fullstack/base.py", line 135, in _assert_ping_during_agents_restart
      self.assertTrue(all(r.done() for r in restarts))
    File "/usr/lib/python3.10/unittest/case.py", line 687, in assertTrue
      raise self.failureException(msg)
  AssertionError: False is not true

  Sample failures:-
   - https://86ddc5b3525cc8a57bd5-84709aab2060acc1565f07c661aff448.ssl.cf1.rackcdn.com/922119/1/check/neutron-fullstack-with-uwsgi/4213115/testr_results.html

   -
  https://storage.gra.cloud.ovh.net/v1/AUTH_dcaab5e32b234d56b626f72581e3644c/zuul_opendev_logs_e5d/888098/15/check/neutron-
  fullstack-with-uwsgi/e5d8147/testr_results.html

   -
  https://storage.bhs.cloud.ovh.net/v1/AUTH_dcaab5e32b234d56b626f72581e3644c/zuul_opendev_logs_6c6/922470/1/check/neutron-
  fullstack-with-uwsgi/6c63681/testr_results.html

   -
  https://storage.gra.cloud.ovh.net/v1/AUTH_dcaab5e32b234d56b626f72581e3644c/zuul_opendev_logs_522/periodic/opendev.org/openstack/neutron/master/neutron-
  fullstack/52235b5/testr_results.html

   -
  https://storage.gra.cloud.ovh.net/v1/AUTH_dcaab5e32b234d56b626f72581e3644c/zuul_opendev_logs_14b/922074/4/check/neutron-
  fullstack-with-uwsgi/14bece8/testr_results.html

  
  Triggered by https://review.opendev.org/c/openstack/neutron/+/919834

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