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[Akihiro Motoki <1255421@xxxxxxxxxxxxxxxxxx>]

** Also affects: neutron/havana
   Importance: Undecided
       Status: New

** Changed in: neutron/havana
       Status: New => In Progress

** Changed in: neutron/havana
   Importance: Undecided => High

** Changed in: neutron/havana
     Assignee: (unassigned) => Akihiro Motoki (amotoki)

** Tags removed: havana-backport-potential

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https://bugs.launchpad.net/bugs/1255421

Title:
  Unittest fails due to unexpected ovs-vsctl calling in ryu plugin test

Status in OpenStack Neutron (virtual network service):
  Fix Released
Status in neutron havana series:
  In Progress

Bug description:
  In the unit test, ovs-vsctl command is unexpectedly called in ryu
  plugin test.

  It occurs in the latest master branch (4b47717b132336396cdbea9d168acaaa30bd5a02).
  In gating test, the followings hit this issue:
  http://logs.openstack.org/70/58270/2/check/gate-neutron-python27/79ef6dd/console.html
  http://logs.openstack.org/25/58125/4/check/gate-neutron-python27/2cc0dc5/console.html#_2013-11-27_01_46_09_003

  According to the result of debugging by adding print_traceback in ovs_lib.OVSBridge.get_vif_port_by_id,
  the following tests fails and the following stack trace is got:

  neutron.tests.unit.ryu.test_ryu_plugin.TestRyuPortsV2.test_update_port_update_ip_address_only
  neutron.tests.unit.ryu.test_ryu_plugin.TestRyuPortsV2.test_update_port
  neutron.tests.unit.ryu.test_ryu_plugin.TestRyuPortsV2.test_update_port_update_ips
  neutron.tests.unit.ryu.test_ryu_plugin.TestRyuPortsV2.test_update_port_delete_ip
  neutron.tests.unit.ryu.test_ryu_plugin.TestRyuPortsV2.test_update_port_add_additional_ip
  neutron.tests.unit.ryu.test_ryu_plugin.TestRyuPortsV2.test_update_port_not_admin
  neutron.tests.unit.ryu.test_ryu_plugin.TestRyuPortsV2.test_update_port_update_ip

    File "/home/ubuntu/neutron/.venv/local/lib/python2.7/site-packages/eventlet/greenthread.py", line 194, in main
      result = function(*args, **kwargs)
    File "neutron/openstack/common/rpc/impl_fake.py", line 67, in _inner
      namespace, **args)
    File "neutron/openstack/common/rpc/dispatcher.py", line 172, in dispatch
      result = getattr(proxyobj, method)(ctxt, **kwargs)
    File "neutron/plugins/openvswitch/agent/ovs_neutron_agent.py", line 296, in port_update
      vif_port = self.int_br.get_vif_port_by_id(port['id'])
    File "neutron/agent/linux/ovs_lib.py", line 362, in get_vif_port_by_id
      print traceback.print_stack()

  More intersting thing is that it occurs only when both OVS plugin test and Ryu plugin test are run.
  More precisely, it happens when we run
  - first neutron.tests.unit.openvswitch.test_ovs_neutron_agent.TestOvsNeutronAgent, and
  - then neutron.tests.unit.ryu.test_ryu_plugin.TestRyuPortsV2.test_update_port

  $ source .venv/bin/activate
  $ OS_DEBUG=1 python setup.py testr --testr-args='--concurrency=4 neutron.tests.unit.openvswitch.test_ovs_neutron_agent.TestOvsNeutronAgent neutron.tests.unit.ryu.test_ryu_plugin.TestRyuPortsV2.test_update_port'

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