Comment 16 for bug 1510680

Installing ipset solves the issue on Mitaka and was able to spin-up a VM on the corresponding network.
But testing a little bit further I saw this problem too when attaching a port to a new created VM instead of assigning a network even if ipset is installed on the compute node.

Down the errors that I saw on the linuxbridge-agent.log on the compute node

2016-05-09 09:52:02.771 1402 ERROR neutron.plugins.ml2.drivers.agent._common_agent [req-d667c5cf-b953-4ca0-a31a-6bed2d387825 - - - - -] Error in agent loop. Devices info: {'current': set([]), 'timestamps': {}, 'removed': set(['tap0272f27b-aa', 'tapad0fb9de-9c']), 'added': set([]), 'updated': set([])}
2016-05-09 09:52:02.771 1402 ERROR neutron.plugins.ml2.drivers.agent._common_agent Traceback (most recent call last):
2016-05-09 09:52:02.771 1402 ERROR neutron.plugins.ml2.drivers.agent._common_agent File "/usr/lib/python2.7/site-packages/neutron/plugins/ml2/drivers/agent/_common_agent.py", line 417, in daemon_loop
2016-05-09 09:52:02.771 1402 ERROR neutron.plugins.ml2.drivers.agent._common_agent sync = self.process_network_devices(device_info)
2016-05-09 09:52:02.771 1402 ERROR neutron.plugins.ml2.drivers.agent._common_agent File "/usr/lib/python2.7/site-packages/neutron/plugins/ml2/drivers/agent/_common_agent.py", line 190, in process_network_devices
2016-05-09 09:52:02.771 1402 ERROR neutron.plugins.ml2.drivers.agent._common_agent device_info.get('updated'))
2016-05-09 09:52:02.771 1402 ERROR neutron.plugins.ml2.drivers.agent._common_agent File "/usr/lib/python2.7/site-packages/neutron/agent/securitygroups_rpc.py", line 315, in setup_port_filters
2016-05-09 09:52:02.771 1402 ERROR neutron.plugins.ml2.drivers.agent._common_agent self.refresh_firewall(updated_devices)
2016-05-09 09:52:02.771 1402 ERROR neutron.plugins.ml2.drivers.agent._common_agent File "/usr/lib/python2.7/site-packages/neutron/agent/securitygroups_rpc.py", line 152, in decorated_function
2016-05-09 09:52:02.771 1402 ERROR neutron.plugins.ml2.drivers.agent._common_agent *args, **kwargs)
2016-05-09 09:52:02.771 1402 ERROR neutron.plugins.ml2.drivers.agent._common_agent File "/usr/lib/python2.7/site-packages/neutron/agent/securitygroups_rpc.py", line 268, in refresh_firewall
2016-05-09 09:52:02.771 1402 ERROR neutron.plugins.ml2.drivers.agent._common_agent self.firewall.update_port_filter(device)
2016-05-09 09:52:02.771 1402 ERROR neutron.plugins.ml2.drivers.agent._common_agent File "/usr/lib64/python2.7/contextlib.py", line 24, in __exit__
2016-05-09 09:52:02.771 1402 ERROR neutron.plugins.ml2.drivers.agent._common_agent self.gen.next()
2016-05-09 09:52:02.771 1402 ERROR neutron.plugins.ml2.drivers.agent._common_agent File "/usr/lib/python2.7/site-packages/neutron/agent/firewall.py", line 128, in defer_apply
2016-05-09 09:52:02.771 1402 ERROR neutron.plugins.ml2.drivers.agent._common_agent self.filter_defer_apply_off()
2016-05-09 09:52:02.771 1402 ERROR neutron.plugins.ml2.drivers.agent._common_agent File "/usr/lib/python2.7/site-packages/neutron/agent/linux/iptables_firewall.py", line 815, in filter_defer_apply_off
2016-05-09 09:52:02.771 1402 ERROR neutron.plugins.ml2.drivers.agent._common_agent self._remove_conntrack_entries_from_sg_updates()
2016-05-09 09:52:02.771 1402 ERROR neutron.plugins.ml2.drivers.agent._common_agent File "/usr/lib/python2.7/site-packages/neutron/agent/linux/iptables_firewall.py", line 802, in _remove_conntrack_entries_from_sg_updates
2016-05-09 09:52:02.771 1402 ERROR neutron.plugins.ml2.drivers.agent._common_agent self._clean_deleted_remote_sg_members_conntrack_entries()
2016-05-09 09:52:02.771 1402 ERROR neutron.plugins.ml2.drivers.agent._common_agent File "/usr/lib/python2.7/site-packages/neutron/agent/linux/iptables_firewall.py", line 794, in _clean_deleted_remote_sg_members_conntrack_entries
2016-05-09 09:52:02.771 1402 ERROR neutron.plugins.ml2.drivers.agent._common_agent devices, ethertype, ips)
2016-05-09 09:52:02.771 1402 ERROR neutron.plugins.ml2.drivers.agent._common_agent File "/usr/lib/python2.7/site-packages/neutron/agent/linux/ip_conntrack.py", line 86, in delete_conntrack_state_by_remote_ips
2016-05-09 09:52:02.771 1402 ERROR neutron.plugins.ml2.drivers.agent._common_agent device_info_list, rule, remote_ip)
2016-05-09 09:52:02.771 1402 ERROR neutron.plugins.ml2.drivers.agent._common_agent File "/usr/lib/python2.7/site-packages/neutron/agent/linux/ip_conntrack.py", line 72, in _delete_conntrack_state
2016-05-09 09:52:02.771 1402 ERROR neutron.plugins.ml2.drivers.agent._common_agent extra_ok_codes=[1])
2016-05-09 09:52:02.771 1402 ERROR neutron.plugins.ml2.drivers.agent._common_agent File "/usr/lib/python2.7/site-packages/neutron/agent/linux/utils.py", line 116, in execute
2016-05-09 09:52:02.771 1402 ERROR neutron.plugins.ml2.drivers.agent._common_agent execute_rootwrap_daemon(cmd, process_input, addl_env))
2016-05-09 09:52:02.771 1402 ERROR neutron.plugins.ml2.drivers.agent._common_agent File "/usr/lib/python2.7/site-packages/neutron/agent/linux/utils.py", line 102, in execute_rootwrap_daemon
2016-05-09 09:52:02.771 1402 ERROR neutron.plugins.ml2.drivers.agent._common_agent return client.execute(cmd, process_input)
2016-05-09 09:52:02.771 1402 ERROR neutron.plugins.ml2.drivers.agent._common_agent File "/usr/lib/python2.7/site-packages/oslo_rootwrap/client.py", line 128, in execute
2016-05-09 09:52:02.771 1402 ERROR neutron.plugins.ml2.drivers.agent._common_agent res = proxy.run_one_command(cmd, stdin)
2016-05-09 09:52:02.771 1402 ERROR neutron.plugins.ml2.drivers.agent._common_agent File "<string>", line 2, in run_one_command
2016-05-09 09:52:02.771 1402 ERROR neutron.plugins.ml2.drivers.agent._common_agent File "/usr/lib64/python2.7/multiprocessing/managers.py", line 773, in _callmethod
2016-05-09 09:52:02.771 1402 ERROR neutron.plugins.ml2.drivers.agent._common_agent raise convert_to_error(kind, result)
2016-05-09 09:52:02.771 1402 ERROR neutron.plugins.ml2.drivers.agent._common_agent RemoteError:
2016-05-09 09:52:02.771 1402 ERROR neutron.plugins.ml2.drivers.agent._common_agent ---------------------------------------------------------------------------
2016-05-09 09:52:02.771 1402 ERROR neutron.plugins.ml2.drivers.agent._common_agent Unserializable message: ('#ERROR', FilterMatchNotExecutable())
2016-05-09 09:52:02.771 1402 ERROR neutron.plugins.ml2.drivers.agent._common_agent ---------------------------------------------------------------------------
2016-05-09 09:52:02.771 1402 ERROR neutron.plugins.ml2.drivers.agent._common_agent

Will keep you posted if I resolve the issue

Thanks