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[Bug 1212401] Re: neutron-dhcp-agent fails to start in TripleO environment "IOError: [Errno 22] Invalid argument"

To: yahoo-eng-team@xxxxxxxxxxxxxxxxxxx
From: Russell Bryant <1212401@xxxxxxxxxxxxxxxxxx>
Date: Wed, 23 Jul 2014 15:28:52 -0000
Reply-to: Bug 1212401 <1212401@xxxxxxxxxxxxxxxxxx>
Sender: bounces@xxxxxxxxxxxxx
** Changed in: neutron
       Status: Fix Committed => Fix Released

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https://bugs.launchpad.net/bugs/1212401

Title:
  neutron-dhcp-agent fails to start in TripleO environment "IOError:
  [Errno 22] Invalid argument"

Status in OpenStack Neutron (virtual network service):
  Fix Released

Bug description:
  While running these steps:

  https://github.com/openstack/tripleo-incubator/blob/master/devtest.md

  In the 'overcloud-control' host, quantum-dhcp-agent is failing to
  start. The backtrace is:

  2013-08-14 18:36:30.074 18361 DEBUG neutron.openstack.common.rpc.amqp [-] UNIQUE_ID is 743c6834c175462781ff7a0d8b0c6447. _add_unique_id /opt/stack/venvs/neutron/local/lib/python2.7/site-packages/neutron/openstack/common/rpc/amqp.py:325
  2013-08-14 18:36:30.082 18361 ERROR neutron.openstack.common.rpc.common [-] AMQP server on 192.0.2.5:5672 is unreachable: [Errno 22] Invalid argument. Trying again in 1 seconds.
  2013-08-14 18:36:30.087 18361 ERROR neutron.openstack.common.rpc.common [-] AMQP server on 192.0.2.5:5672 is unreachable: [Errno 22] Invalid argument. Trying again in 1 seconds.
  2013-08-14 18:36:30.087 18361 ERROR neutron.openstack.common.threadgroup [-] [Errno 22] Invalid argument
  2013-08-14 18:36:30.087 18361 TRACE neutron.openstack.common.threadgroup Traceback (most recent call last):
  2013-08-14 18:36:30.087 18361 TRACE neutron.openstack.common.threadgroup   File "/opt/stack/venvs/neutron/local/lib/python2.7/site-packages/neutron/openstack/common/threadgroup.py", line 117, in wait
  2013-08-14 18:36:30.087 18361 TRACE neutron.openstack.common.threadgroup     x.wait()
  2013-08-14 18:36:30.087 18361 TRACE neutron.openstack.common.threadgroup   File "/opt/stack/venvs/neutron/local/lib/python2.7/site-packages/neutron/openstack/common/threadgroup.py", line 49, in wait
  2013-08-14 18:36:30.087 18361 TRACE neutron.openstack.common.threadgroup     return self.thread.wait()
  2013-08-14 18:36:30.087 18361 TRACE neutron.openstack.common.threadgroup   File "/opt/stack/venvs/neutron/local/lib/python2.7/site-packages/eventlet/greenthread.py", line 168, in wait
  2013-08-14 18:36:30.087 18361 TRACE neutron.openstack.common.threadgroup     return self._exit_event.wait()
  2013-08-14 18:36:30.087 18361 TRACE neutron.openstack.common.threadgroup   File "/opt/stack/venvs/neutron/local/lib/python2.7/site-packages/eventlet/event.py", line 116, in wait
  2013-08-14 18:36:30.087 18361 TRACE neutron.openstack.common.threadgroup     return hubs.get_hub().switch()
  2013-08-14 18:36:30.087 18361 TRACE neutron.openstack.common.threadgroup   File "/opt/stack/venvs/neutron/local/lib/python2.7/site-packages/eventlet/hubs/hub.py", line 187, in switch
  2013-08-14 18:36:30.087 18361 TRACE neutron.openstack.common.threadgroup     return self.greenlet.switch()
  2013-08-14 18:36:30.087 18361 TRACE neutron.openstack.common.threadgroup   File "/opt/stack/venvs/neutron/local/lib/python2.7/site-packages/eventlet/hubs/hub.py", line 236, in run
  2013-08-14 18:36:30.087 18361 TRACE neutron.openstack.common.threadgroup     self.wait(sleep_time)
  2013-08-14 18:36:30.087 18361 TRACE neutron.openstack.common.threadgroup   File "/opt/stack/venvs/neutron/local/lib/python2.7/site-packages/eventlet/hubs/poll.py", line 84, in wait
  2013-08-14 18:36:30.087 18361 TRACE neutron.openstack.common.threadgroup     presult = self.do_poll(seconds)
  2013-08-14 18:36:30.087 18361 TRACE neutron.openstack.common.threadgroup   File "/opt/stack/venvs/neutron/local/lib/python2.7/site-packages/eventlet/hubs/epolls.py", line 61, in do_poll
  2013-08-14 18:36:30.087 18361 TRACE neutron.openstack.common.threadgroup     return self.poll.poll(seconds)
  2013-08-14 18:36:30.087 18361 TRACE neutron.openstack.common.threadgroup IOError: [Errno 22] Invalid argument
  2013-08-14 18:36:30.087 18361 TRACE neutron.openstack.common.threadgroup

  A full error is at http://paste.openstack.org/show/44151/

  This must be a race, because running under 'strace -f', which tends to
  slow everything down, results in a working quantum-dhcp-agent. I will
  attach straces of an unsuccessful (without -f) and successful (with
  -f) strace run.

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