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[Bug 1898859] [NEW] Functional test neutron.tests.functional.agent.linux.test_keepalived.KeepalivedManagerTestCase.test_keepalived_spawns_conflicting_pid_vrrp_subprocess is failing

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Public bug reported:

I saw it at least few times that test
neutron.tests.functional.agent.linux.test_keepalived.KeepalivedManagerTestCase.test_keepalived_spawns_conflicting_pid_vrrp_subprocess
failed in same way:

ft1.4: neutron.tests.functional.agent.linux.test_keepalived.KeepalivedManagerTestCase.test_keepalived_spawns_conflicting_pid_vrrp_subprocesstesttools.testresult.real._StringException: Traceback (most recent call last):
  File "/home/zuul/src/opendev.org/openstack/neutron/.tox/dsvm-functional/lib/python3.8/site-packages/fixtures/fixture.py", line 125, in cleanUp
    return self._cleanups(raise_errors=raise_first)
  File "/home/zuul/src/opendev.org/openstack/neutron/.tox/dsvm-functional/lib/python3.8/site-packages/fixtures/callmany.py", line 89, in __call__
    reraise(error[0], error[1], error[2])
  File "/home/zuul/src/opendev.org/openstack/neutron/.tox/dsvm-functional/lib/python3.8/site-packages/testtools/_compat3x.py", line 16, in reraise
    raise exc_obj.with_traceback(exc_tb)
  File "/home/zuul/src/opendev.org/openstack/neutron/.tox/dsvm-functional/lib/python3.8/site-packages/fixtures/callmany.py", line 83, in __call__
    cleanup(*args, **kwargs)
  File "/home/zuul/src/opendev.org/openstack/neutron/neutron/tests/common/net_helpers.py", line 618, in destroy
    self.ip_wrapper.netns.delete(self.name)
  File "/home/zuul/src/opendev.org/openstack/neutron/neutron/agent/linux/ip_lib.py", line 706, in delete
    delete_network_namespace(name)
  File "/home/zuul/src/opendev.org/openstack/neutron/neutron/agent/linux/ip_lib.py", line 912, in delete_network_namespace
    privileged.remove_netns(namespace, **kwargs)
  File "/home/zuul/src/opendev.org/openstack/neutron/.tox/dsvm-functional/lib/python3.8/site-packages/oslo_privsep/priv_context.py", line 247, in _wrap
    return self.channel.remote_call(name, args, kwargs)
  File "/home/zuul/src/opendev.org/openstack/neutron/.tox/dsvm-functional/lib/python3.8/site-packages/oslo_privsep/daemon.py", line 214, in remote_call
    result = self.send_recv((Message.CALL.value, name, args, kwargs))
  File "/home/zuul/src/opendev.org/openstack/neutron/.tox/dsvm-functional/lib/python3.8/site-packages/oslo_privsep/comm.py", line 172, in send_recv
    reply = future.result()
  File "/home/zuul/src/opendev.org/openstack/neutron/.tox/dsvm-functional/lib/python3.8/site-packages/oslo_privsep/comm.py", line 109, in result
    self.condvar.wait()
  File "/usr/lib/python3.8/threading.py", line 302, in wait
    waiter.acquire()
  File "/home/zuul/src/opendev.org/openstack/neutron/.tox/dsvm-functional/lib/python3.8/site-packages/eventlet/semaphore.py", line 115, in acquire
    hubs.get_hub().switch()
  File "/home/zuul/src/opendev.org/openstack/neutron/.tox/dsvm-functional/lib/python3.8/site-packages/eventlet/hubs/hub.py", line 298, in switch
    return self.greenlet.switch()
  File "/home/zuul/src/opendev.org/openstack/neutron/.tox/dsvm-functional/lib/python3.8/site-packages/eventlet/hubs/hub.py", line 350, in run
    self.wait(sleep_time)
  File "/home/zuul/src/opendev.org/openstack/neutron/.tox/dsvm-functional/lib/python3.8/site-packages/eventlet/hubs/poll.py", line 80, in wait
    presult = self.do_poll(seconds)
  File "/home/zuul/src/opendev.org/openstack/neutron/.tox/dsvm-functional/lib/python3.8/site-packages/eventlet/hubs/epolls.py", line 31, in do_poll
    return self.poll.poll(seconds)
  File "/home/zuul/src/opendev.org/openstack/neutron/.tox/dsvm-functional/lib/python3.8/site-packages/fixtures/_fixtures/timeout.py", line 52, in signal_handler
    raise TimeoutException()
fixtures._fixtures.timeout.TimeoutException


Example of failure:
https://storage.bhs.cloud.ovh.net/v1/AUTH_dcaab5e32b234d56b626f72581e3644c/zuul_opendev_logs_912/755169/1/check/neutron-functional-with-uwsgi/9123df0/testr_results.html

https://abb45a05a18b43ca0d95-d78d8ef0830aa9db46429a25978bd123.ssl.cf2.rackcdn.com/754485/4/check
/neutron-functional-with-uwsgi/5dd76c9/job-output.txt

** Affects: neutron
     Importance: High
         Status: Confirmed


** Tags: functional-tests gate-failure

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https://bugs.launchpad.net/bugs/1898859

Title:
  Functional test
  neutron.tests.functional.agent.linux.test_keepalived.KeepalivedManagerTestCase.test_keepalived_spawns_conflicting_pid_vrrp_subprocess
  is failing

Status in neutron:
  Confirmed

Bug description:
  I saw it at least few times that test
  neutron.tests.functional.agent.linux.test_keepalived.KeepalivedManagerTestCase.test_keepalived_spawns_conflicting_pid_vrrp_subprocess
  failed in same way:

  ft1.4: neutron.tests.functional.agent.linux.test_keepalived.KeepalivedManagerTestCase.test_keepalived_spawns_conflicting_pid_vrrp_subprocesstesttools.testresult.real._StringException: Traceback (most recent call last):
    File "/home/zuul/src/opendev.org/openstack/neutron/.tox/dsvm-functional/lib/python3.8/site-packages/fixtures/fixture.py", line 125, in cleanUp
      return self._cleanups(raise_errors=raise_first)
    File "/home/zuul/src/opendev.org/openstack/neutron/.tox/dsvm-functional/lib/python3.8/site-packages/fixtures/callmany.py", line 89, in __call__
      reraise(error[0], error[1], error[2])
    File "/home/zuul/src/opendev.org/openstack/neutron/.tox/dsvm-functional/lib/python3.8/site-packages/testtools/_compat3x.py", line 16, in reraise
      raise exc_obj.with_traceback(exc_tb)
    File "/home/zuul/src/opendev.org/openstack/neutron/.tox/dsvm-functional/lib/python3.8/site-packages/fixtures/callmany.py", line 83, in __call__
      cleanup(*args, **kwargs)
    File "/home/zuul/src/opendev.org/openstack/neutron/neutron/tests/common/net_helpers.py", line 618, in destroy
      self.ip_wrapper.netns.delete(self.name)
    File "/home/zuul/src/opendev.org/openstack/neutron/neutron/agent/linux/ip_lib.py", line 706, in delete
      delete_network_namespace(name)
    File "/home/zuul/src/opendev.org/openstack/neutron/neutron/agent/linux/ip_lib.py", line 912, in delete_network_namespace
      privileged.remove_netns(namespace, **kwargs)
    File "/home/zuul/src/opendev.org/openstack/neutron/.tox/dsvm-functional/lib/python3.8/site-packages/oslo_privsep/priv_context.py", line 247, in _wrap
      return self.channel.remote_call(name, args, kwargs)
    File "/home/zuul/src/opendev.org/openstack/neutron/.tox/dsvm-functional/lib/python3.8/site-packages/oslo_privsep/daemon.py", line 214, in remote_call
      result = self.send_recv((Message.CALL.value, name, args, kwargs))
    File "/home/zuul/src/opendev.org/openstack/neutron/.tox/dsvm-functional/lib/python3.8/site-packages/oslo_privsep/comm.py", line 172, in send_recv
      reply = future.result()
    File "/home/zuul/src/opendev.org/openstack/neutron/.tox/dsvm-functional/lib/python3.8/site-packages/oslo_privsep/comm.py", line 109, in result
      self.condvar.wait()
    File "/usr/lib/python3.8/threading.py", line 302, in wait
      waiter.acquire()
    File "/home/zuul/src/opendev.org/openstack/neutron/.tox/dsvm-functional/lib/python3.8/site-packages/eventlet/semaphore.py", line 115, in acquire
      hubs.get_hub().switch()
    File "/home/zuul/src/opendev.org/openstack/neutron/.tox/dsvm-functional/lib/python3.8/site-packages/eventlet/hubs/hub.py", line 298, in switch
      return self.greenlet.switch()
    File "/home/zuul/src/opendev.org/openstack/neutron/.tox/dsvm-functional/lib/python3.8/site-packages/eventlet/hubs/hub.py", line 350, in run
      self.wait(sleep_time)
    File "/home/zuul/src/opendev.org/openstack/neutron/.tox/dsvm-functional/lib/python3.8/site-packages/eventlet/hubs/poll.py", line 80, in wait
      presult = self.do_poll(seconds)
    File "/home/zuul/src/opendev.org/openstack/neutron/.tox/dsvm-functional/lib/python3.8/site-packages/eventlet/hubs/epolls.py", line 31, in do_poll
      return self.poll.poll(seconds)
    File "/home/zuul/src/opendev.org/openstack/neutron/.tox/dsvm-functional/lib/python3.8/site-packages/fixtures/_fixtures/timeout.py", line 52, in signal_handler
      raise TimeoutException()
  fixtures._fixtures.timeout.TimeoutException

  
  Example of failure:
  https://storage.bhs.cloud.ovh.net/v1/AUTH_dcaab5e32b234d56b626f72581e3644c/zuul_opendev_logs_912/755169/1/check/neutron-functional-with-uwsgi/9123df0/testr_results.html

  https://abb45a05a18b43ca0d95-d78d8ef0830aa9db46429a25978bd123.ssl.cf2.rackcdn.com/754485/4/check
  /neutron-functional-with-uwsgi/5dd76c9/job-output.txt

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