Functional tests failing due to timeout while killing process

[Slawek Kaplonski]

Example of failures:

    https://cb02acb070cff5b90918-a2819ce1e1d01d4ba47cf0d26d5585a5.ssl.cf5.rackcdn.com/778993/6/gate/neutron-functional-with-uwsgi/ebebe12/testr_results.html

    https://0ee130e4a5a2946be1c4-63ec39ca44f5300255d15df097f93e08.ssl.cf1.rackcdn.com/780054/2/check/neutron-functional-with-uwsgi/bc96480/testr_results.html

    https://2593fe2c1676d625fafc-b5f24c1063ad83372f17d0890078a578.ssl.cf5.rackcdn.com/765846/7/check/neutron-functional-with-uwsgi/29b9cdc/testr_results.html

    https://storage.gra.cloud.ovh.net/v1/AUTH_dcaab5e32b234d56b626f72581e3644c/zuul_opendev_logs_b83/763231/16/check/neutron-functional-with-uwsgi/b836250/testr_results.html

Stacktrace:

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/neutron/tests/functional/agent/linux/test_keepalived.py", line 54, in _stop_keepalived_manager
    self.manager.disable()
  File "/home/zuul/src/opendev.org/openstack/neutron/neutron/agent/linux/keepalived.py", line 482, in disable
    pm.disable(sig=str(int(signal.SIGTERM)))
  File "/home/zuul/src/opendev.org/openstack/neutron/neutron/agent/linux/external_process.py", line 113, in disable
    utils.execute(cmd, run_as_root=self.run_as_root,
  File "/home/zuul/src/opendev.org/openstack/neutron/neutron/agent/linux/utils.py", line 131, in execute
    _stdout, _stderr, returncode = priv_utils.execute_process(
  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 120, 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 313, 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 365, 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

[Rodolfo Alonso (rodolfo-alonso-hernandez)]

This issue was addressed in [1]. Until we find a better method to re-implement shell command "kill", we'll continue using it.

[1]https://review.opendev.org/c/openstack/neutron/+/782972