We still hit the issue, though the trace is a bit different now: http://logs.openstack.org/38/284738/69/check/gate-neutron-dsvm- fullstack-ubuntu-xenial/2e022c5/logs/syslog.txt.gz
Apr 28 17:24:20 ubuntu-xenial-rax-ord-8648308 neutron-keepalived-state-change[21615]: 2017-04-28 17:24:20.423 21615 CRITICAL neutron [-] AssertionError: do not call blocking functions from the mainloop 2017-04-28 17:24:20.423 21615 ERROR neutron Traceback (most recent call last): 2017-04-28 17:24:20.423 21615 ERROR neutron File "/opt/stack/new/neutron/.tox/dsvm-fullstack/bin/neutron-keepalived-state-change", line 10, in <module> 2017-04-28 17:24:20.423 21615 ERROR neutron sys.exit(main()) 2017-04-28 17:24:20.423 21615 ERROR neutron File "/opt/stack/new/neutron/neutron/cmd/keepalived_state_change.py", line 19, in main 2017-04-28 17:24:20.423 21615 ERROR neutron keepalived_state_change.main() 2017-04-28 17:24:20.423 21615 ERROR neutron File "/opt/stack/new/neutron/neutron/agent/l3/keepalived_state_change.py", line 156, in main 2017-04-28 17:24:20.423 21615 ERROR neutron cfg.CONF.monitor_cidr).start() 2017-04-28 17:24:20.423 21615 ERROR neutron File "/opt/stack/new/neutron/neutron/agent/linux/daemon.py", line 253, in start 2017-04-28 17:24:20.423 21615 ERROR neutron self.run() 2017-04-28 17:24:20.423 21615 ERROR neutron File "/opt/stack/new/neutron/neutron/agent/l3/keepalived_state_change.py", line 69, in run 2017-04-28 17:24:20.423 21615 ERROR neutron for iterable in self.monitor: 2017-04-28 17:24:20.423 21615 ERROR neutron File "/opt/stack/new/neutron/neutron/agent/linux/async_process.py", line 261, in _iter_queue 2017-04-28 17:24:20.423 21615 ERROR neutron yield queue.get(block=block) 2017-04-28 17:24:20.423 21615 ERROR neutron File "/opt/stack/new/neutron/.tox/dsvm-fullstack/local/lib/python2.7/site-packages/eventlet/queue.py", line 313, in get 2017-04-28 17:24:20.423 21615 ERROR neutron return waiter.wait() 2017-04-28 17:24:20.423 21615 ERROR neutron File "/opt/stack/new/neutron/.tox/dsvm-fullstack/local/lib/python2.7/site-packages/eventlet/queue.py", line 141, in wait 2017-04-28 17:24:20.423 21615 ERROR neutron return get_hub().switch() 2017-04-28 17:24:20.423 21615 ERROR neutron File "/opt/stack/new/neutron/.tox/dsvm-fullstack/local/lib/python2.7/site-packages/eventlet/hubs/hub.py", line 294, in switch 2017-04-28 17:24:20.423 21615 ERROR neutron return self.greenlet.switch() 2017-04-28 17:24:20.423 21615 ERROR neutron File "/opt/stack/new/neutron/.tox/dsvm-fullstack/local/lib/python2.7/site-packages/eventlet/hubs/hub.py", line 346, in run 2017-04-28 17:24:20.423 21615 ERROR neutron self.wait(sleep_time) 2017-04-28 17:24:20.423 21615 ERROR neutron File "/opt/stack/new/neutron/.tox/dsvm-fullstack/local/lib/python2.7/site-packages/eventlet/hubs/poll.py", line 85, in wait 2017-04-28 17:24:20.423 21615 ERROR neutron presult = self.do_poll(seconds) 2017-04-28 17:24:20.423 21615 ERROR neutron File "/opt/stack/new/neutron/.tox/dsvm-fullstack/local/lib/python2.7/site-packages/eventlet/hubs/epolls.py", line 62, in do_poll 2017-04-28 17:24:20.423 21615 ERROR neutron return self.poll.poll(seconds) 2017-04-28 17:24:20.423 21615 ERROR neutron File "/opt/stack/new/neutron/neutron/agent/l3/keepalived_state_change.py", line 133, in handle_sigterm 2017-04-28 17:24:20.423 21615 ERROR neutron self._kill_monitor() 2017-04-28 17:24:20.423 21615 ERROR neutron File "/opt/stack/new/neutron/neutron/agent/l3/keepalived_state_change.py", line 130, in _kill_monitor 2017-04-28 17:24:20.423 21615 ERROR neutron run_as_root=True) 2017-04-28 17:24:20.423 21615 ERROR neutron File "/opt/stack/new/neutron/neutron/agent/linux/utils.py", line 225, in kill_process 2017-04-28 17:24:20.423 21615 ERROR neutron execute(['kill', '-%d' % signal, pid], run_as_root=run_as_root) 2017-04-28 17:24:20.423 21615 ERROR neutron File "/opt/stack/new/neutron/neutron/agent/linux/utils.py", line 131, in execute 2017-04-28 17:24:20.423 21615 ERROR neutron _stdout, _stderr = obj.communicate(_process_input) 2017-04-28 17:24:20.423 21615 ERROR neutron File "/usr/lib/python2.7/subprocess.py", line 800, in communicate 2017-04-28 17:24:20.423 21615 ERROR neutron return self._communicate(input) 2017-04-28 17:24:20.423 21615 ERROR neutron File "/usr/lib/python2.7/subprocess.py", line 1419, in _communicate 2017-04-28 17:24:20.423 21615 ERROR neutron stdout, stderr = self._communicate_with_select(input) 2017-04-28 17:24:20.423 21615 ERROR neutron File "/usr/lib/python2.7/subprocess.py", line 1520, in _communicate_with_select 2017-04-28 17:24:20.423 21615 ERROR neutron rlist, wlist, xlist = select.select(read_set, write_set, []) 2017-04-28 17:24:20.423 21615 ERROR neutron File "/opt/stack/new/neutron/.tox/dsvm-fullstack/local/lib/python2.7/site-packages/eventlet/green/select.py", line 40, in select 2017-04-28 17:24:20.423 21615 ERROR neutron assert hub.greenlet is not current, 'do not call blocking functions from the mainloop' 2017-04-28 17:24:20.423 21615 ERROR neutron AssertionError: do not call blocking functions from the mainloop 2017-04-28 17:24:20.423 21615 ERROR neutron We probably need to rework how we handle the signal, not calling execute() from inside the handler. ** Changed in: neutron Status: Fix Released => Confirmed -- You received this bug notification because you are a member of Yahoo! Engineering Team, which is subscribed to neutron. https://bugs.launchpad.net/bugs/1680183 Title: neutron-keepalived-state-change fails with "AssertionError: do not call blocking functions from the mainloop" Status in neutron: Confirmed Bug description: 17:39:17.802 6173 CRITICAL neutron [-] AssertionError: do not call blocking functions from the mainloop 17:39:17.802 6173 ERROR neutron Traceback (most recent call last): 17:39:17.802 6173 ERROR neutron File "/opt/stack/neutron/.tox/dsvm-functional/bin/neutron-keepalived-state-change", line 10, in <module> 17:39:17.802 6173 ERROR neutron sys.exit(main()) 17:39:17.802 6173 ERROR neutron File "/opt/stack/neutron/neutron/cmd/keepalived_state_change.py", line 19, in main 17:39:17.802 6173 ERROR neutron keepalived_state_change.main() 17:39:17.802 6173 ERROR neutron File "/opt/stack/neutron/neutron/agent/l3/keepalived_state_change.py", line 157, in main 17:39:17.802 6173 ERROR neutron cfg.CONF.monitor_cidr).start() 17:39:17.802 6173 ERROR neutron File "/opt/stack/neutron/neutron/agent/linux/daemon.py", line 249, in start 17:39:17.802 6173 ERROR neutron self.run() 17:39:17.802 6173 ERROR neutron File "/opt/stack/neutron/neutron/agent/l3/keepalived_state_change.py", line 70, in run 17:39:17.802 6173 ERROR neutron for iterable in self.monitor: 17:39:17.802 6173 ERROR neutron File "/opt/stack/neutron/neutron/agent/linux/async_process.py", line 256, in _iter_queue 17:39:17.802 6173 ERROR neutron yield queue.get(block=block) 17:39:17.802 6173 ERROR neutron File "/opt/stack/neutron/.tox/dsvm-functional/lib/python2.7/site-packages/eventlet/queue.py", line 313, in get 17:39:17.802 6173 ERROR neutron return waiter.wait() 17:39:17.802 6173 ERROR neutron File "/opt/stack/neutron/.tox/dsvm-functional/lib/python2.7/site-packages/eventlet/queue.py", line 141, in wait 17:39:17.802 6173 ERROR neutron return get_hub().switch() 17:39:17.802 6173 ERROR neutron File "/opt/stack/neutron/.tox/dsvm-functional/lib/python2.7/site-packages/eventlet/hubs/hub.py", line 294, in switch 17:39:17.802 6173 ERROR neutron return self.greenlet.switch() 17:39:17.802 6173 ERROR neutron File "/opt/stack/neutron/.tox/dsvm-functional/lib/python2.7/site-packages/eventlet/hubs/hub.py", line 346, in run 17:39:17.802 6173 ERROR neutron self.wait(sleep_time) 17:39:17.802 6173 ERROR neutron File "/opt/stack/neutron/.tox/dsvm-functional/lib/python2.7/site-packages/eventlet/hubs/poll.py", line 85, in wait 17:39:17.802 6173 ERROR neutron presult = self.do_poll(seconds) 17:39:17.802 6173 ERROR neutron File "/opt/stack/neutron/.tox/dsvm-functional/lib/python2.7/site-packages/eventlet/hubs/epolls.py", line 62, in do_poll 17:39:17.802 6173 ERROR neutron return self.poll.poll(seconds) 17:39:17.802 6173 ERROR neutron File "/opt/stack/neutron/neutron/agent/l3/keepalived_state_change.py", line 134, in handle_sigterm 17:39:17.802 6173 ERROR neutron self._kill_monitor() 17:39:17.802 6173 ERROR neutron File "/opt/stack/neutron/neutron/agent/l3/keepalived_state_change.py", line 131, in _kill_monitor 17:39:17.802 6173 ERROR neutron run_as_root=True) 17:39:17.802 6173 ERROR neutron File "/opt/stack/neutron/neutron/agent/linux/utils.py", line 221, in kill_process 17:39:17.802 6173 ERROR neutron execute(['kill', '-%d' % signal, pid], run_as_root=run_as_root) 17:39:17.802 6173 ERROR neutron File "/opt/stack/neutron/neutron/agent/linux/utils.py", line 155, in execute 17:39:17.802 6173 ERROR neutron greenthread.sleep(0) 17:39:17.802 6173 ERROR neutron File "/opt/stack/neutron/.tox/dsvm-functional/lib/python2.7/site-packages/eventlet/greenthread.py", line 31, in sleep 17:39:17.802 6173 ERROR neutron assert hub.greenlet is not current, 'do not call blocking functions from the mainloop' 17:39:17.802 6173 ERROR neutron AssertionError: do not call blocking functions from the mainloop 17:39:17.802 6173 ERROR neutron This is what I see when running fullstack l3ha tests, once I enable syslog logging for the helper process. 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