# Pastebin 1IAgqzBE
2017-02-01 11:13:32.882 TRACE os_vif Traceback (most recent call last):
2017-02-01 11:13:32.882 TRACE os_vif   File "/usr/local/lib/python2.7/dist-packages/os_vif/__init__.py", line 113, in unplug
2017-02-01 11:13:32.882 TRACE os_vif     plugin.unplug(vif, instance_info)
2017-02-01 11:13:32.882 TRACE os_vif   File "/usr/local/lib/python2.7/dist-packages/vif_plug_ovs/ovs.py", line 216, in unplug
2017-02-01 11:13:32.882 TRACE os_vif     self._unplug_bridge(vif, instance_info)
2017-02-01 11:13:32.882 TRACE os_vif   File "/usr/local/lib/python2.7/dist-packages/vif_plug_ovs/ovs.py", line 192, in _unplug_bridge
2017-02-01 11:13:32.882 TRACE os_vif     linux_net.delete_bridge(vif.bridge_name, v1_name)
2017-02-01 11:13:32.882 TRACE os_vif   File "/usr/local/lib/python2.7/dist-packages/oslo_privsep/priv_context.py", line 205, in _wrap
2017-02-01 11:13:32.882 TRACE os_vif     return self.channel.remote_call(name, args, kwargs)
2017-02-01 11:13:32.882 TRACE os_vif   File "/usr/local/lib/python2.7/dist-packages/oslo_privsep/daemon.py", line 186, in remote_call
2017-02-01 11:13:32.882 TRACE os_vif     exc_type = importutils.import_class(result[1])
2017-02-01 11:13:32.882 TRACE os_vif   File "/usr/local/lib/python2.7/dist-packages/oslo_utils/importutils.py", line 30, in import_class
2017-02-01 11:13:32.882 TRACE os_vif     __import__(mod_str)
2017-02-01 11:13:32.882 TRACE os_vif ImportError: No module named builtins
2017-02-01 11:13:32.882 TRACE os_vif