Neutron dsvm functional tests fail with TimeoutException in test_killed_monitor_respawns

[Dane LeBlanc]

Occasionally the check-neutron-dsvm-functional upstream gating tests fail with a TimeoutException error in the neutron.tests.functional.agent.linux.test_ovsdb_monitor.TestOvsdbMonitor.test_killed_monitor_respawns tests (both vsctl and native):

http://logstash.openstack.org/#eyJzZWFyY2giOiJcImxpbmUgODEsIGluIHRlc3Rfa2lsbGVkX21vbml0b3JfcmVzcGF3bnNcIiAiLCJmaWVsZHMiOltdLCJvZmZzZXQiOjAsInRpbWVmcmFtZSI6IjE3MjgwMCIsImdyYXBobW9kZSI6ImNvdW50IiwidGltZSI6eyJ1c2VyX2ludGVydmFsIjowfSwic3RhbXAiOjE0Mjg5NDA3NDYwMDh9

Here's a sample log from a failing check-neutron-dsvm-functional test run:

ft1.123: neutron.tests.functional.agent.linux.test_ovsdb_monitor.TestOvsdbMonitor.test_killed_monitor_respawns(vsctl)_StringException: Empty attachments:
  pythonlogging:''
  pythonlogging:'neutron.api.extensions'
  stderr
  stdout

Traceback (most recent call last):
  File "neutron/tests/functional/agent/linux/test_ovsdb_monitor.py", line 81, in test_killed_monitor_respawns
    output1 = self.collect_initial_output()
  File "neutron/tests/functional/agent/linux/test_ovsdb_monitor.py", line 76, in collect_initial_output
    eventlet.sleep(0.01)
  File "/opt/stack/new/neutron/.tox/dsvm-functional/local/lib/python2.7/site-packages/eventlet/greenthread.py", line 34, in sleep
    hub.switch()
  File "/opt/stack/new/neutron/.tox/dsvm-functional/local/lib/python2.7/site-packages/eventlet/hubs/hub.py", line 294, in switch
    return self.greenlet.switch()
  File "/opt/stack/new/neutron/.tox/dsvm-functional/local/lib/python2.7/site-packages/eventlet/hubs/hub.py", line 346, in run
    self.wait(sleep_time)
  File "/opt/stack/new/neutron/.tox/dsvm-functional/local/lib/python2.7/site-packages/eventlet/hubs/poll.py", line 85, in wait
    presult = self.do_poll(seconds)
  File "/opt/stack/new/neutron/.tox/dsvm-functional/local/lib/python2.7/site-packages/eventlet/hubs/epolls.py", line 62, in do_poll
    return self.poll.poll(seconds)
  File "/opt/stack/new/neutron/.tox/dsvm-functional/local/lib/python2.7/site-packages/fixtures/_fixtures/timeout.py", line 52, in signal_handler
    raise TimeoutException()
fixtures._fixtures.timeout.TimeoutException

[Ihar Hrachyshka (ihar-hrachyshka)]

Expected to be fixed with: https://review.openstack.org/#/c/176661/

[Kyle Mestery (mestery)]

The fix referenced in #1 was merged during Kilo, so marking this Fix Released.