The following was logged while running on Xenial:
2017-03-20 09:03:39.063 31121 DEBUG os_vif [-] Plugging vif VIFBridge(active=True,address=fa:16:3e:09:e0:2d,bridge_name='qbr3e519fd3-c6',has_traffic_filtering=True,id=3e519fd3-c671-4627-ba39-f9fcebf3d2f3,network=Network(483f2685-846c-4a46-83fc-9e5cc4243451),plugin='ovs',port_profile=VIFPortProfileOpenVSwitch,preserve_on_delete=False,vif_name='tap3e519fd3-c6') plug /usr/local/lib/python2.7/dist-packages/os_vif/__init__.py:79
2017-03-20 09:03:39.065 31121 INFO oslo.privsep.daemon [-] Running privsep helper: ['sudo', 'privsep-helper', '--config-file', u'/etc/kuryr/kuryr.conf', '--privsep_context', 'vif_plug_ovs.privsep.vif_plug', '--privsep_sock_path', '/tmp/tmpw_hQ_9/privsep.sock']
2017-03-20 09:03:39.480 31121 INFO oslo.privsep.daemon [-] Spawned new privsep daemon via rootwrap
2017-03-20 09:03:39.481 31121 DEBUG oslo.privsep.daemon [-] Accepted privsep connection to /tmp/tmpw_hQ_9/privsep.sock __init__ /usr/local/lib/python2.7/dist-packages/oslo_privsep/daemon.py:332
Traceback (most recent call last):
  File "/usr/lib/python2.7/logging/__init__.py", line 861, in emit
    msg = self.format(record)
  File "/usr/local/lib/python2.7/dist-packages/oslo_log/handlers.py", line 100, in format
    return logging.StreamHandler.format(self, record)
  File "/usr/lib/python2.7/logging/__init__.py", line 734, in format
    return fmt.format(record)
  File "/usr/local/lib/python2.7/dist-packages/oslo_log/formatters.py", line 273, in format
    for arg in record.args:
TypeError: 'NoneType' object is not iterable
Logged from file daemon.py, line 506
Traceback (most recent call last):
  File "/usr/lib/python2.7/logging/__init__.py", line 861, in emit
    msg = self.format(record)
  File "/usr/local/lib/python2.7/dist-packages/oslo_log/handlers.py", line 100, in format
    return logging.StreamHandler.format(self, record)
  File "/usr/lib/python2.7/logging/__init__.py", line 734, in format
    return fmt.format(record)
  File "/usr/local/lib/python2.7/dist-packages/oslo_log/formatters.py", line 273, in format
    for arg in record.args:
TypeError: 'NoneType' object is not iterable
Logged from file daemon.py, line 395
Traceback (most recent call last):
  File "/usr/lib/python2.7/logging/__init__.py", line 861, in emit
    msg = self.format(record)
  File "/usr/local/lib/python2.7/dist-packages/oslo_log/handlers.py", line 100, in format
    return logging.StreamHandler.format(self, record)
  File "/usr/lib/python2.7/logging/__init__.py", line 734, in format
    return fmt.format(record)
  File "/usr/local/lib/python2.7/dist-packages/oslo_log/formatters.py", line 273, in format
    for arg in record.args:
TypeError: 'NoneType' object is not iterable
Logged from file daemon.py, line 414
Traceback (most recent call last):
  File "/usr/lib/python2.7/logging/__init__.py", line 861, in emit
    msg = self.format(record)
  File "/usr/local/lib/python2.7/dist-packages/oslo_log/handlers.py", line 100, in format
    return logging.StreamHandler.format(self, record)
  File "/usr/lib/python2.7/logging/__init__.py", line 734, in format
    return fmt.format(record)
  File "/usr/local/lib/python2.7/dist-packages/oslo_log/formatters.py", line 273, in format
    for arg in record.args:
TypeError: 'NoneType' object is not iterable