Original Stack trace from Roman

  /usr/local/lib/python2.7/dist-packages/eventlet/greenpool.py(80)_spawn_n_impl()
-> func(*args, **kwargs)
  /usr/local/lib/python2.7/dist-packages/eventlet/wsgi.py(594)process_request()
-> proto.__init__(sock, address, self)
  /usr/lib/python2.7/SocketServer.py(649)__init__()
-> self.handle()
  /usr/lib/python2.7/BaseHTTPServer.py(340)handle()
-> self.handle_one_request()
  /usr/local/lib/python2.7/dist-packages/eventlet/wsgi.py(285)handle_one_request()
-> self.handle_one_response()
  /usr/local/lib/python2.7/dist-packages/eventlet/wsgi.py(389)handle_one_response()
-> result = self.application(self.environ, start_response)
  /usr/lib/python2.7/dist-packages/paste/urlmap.py(203)__call__()
-> return app(environ, start_response)
  /usr/lib/python2.7/dist-packages/webob/dec.py(130)__call__()
-> resp = self.call_func(req, *args, **self.kwargs)
  /usr/lib/python2.7/dist-packages/webob/dec.py(195)call_func()
-> return self.func(req, *args, **kwargs)
  /opt/stack/venvs/nova/local/lib/python2.7/site-packages/nova/api/ec2/__init__.py(88)__call__()
-> return req.get_response(self.application)
  /usr/lib/python2.7/dist-packages/webob/request.py(1296)send()
-> application, catch_exc_info=False)
  /usr/lib/python2.7/dist-packages/webob/request.py(1260)call_application()
-> app_iter = application(self.environ, start_response)
  /usr/lib/python2.7/dist-packages/webob/dec.py(130)__call__()
-> resp = self.call_func(req, *args, **self.kwargs)
  /usr/lib/python2.7/dist-packages/webob/dec.py(195)call_func()
-> return self.func(req, *args, **kwargs)
  /opt/stack/venvs/nova/local/lib/python2.7/site-packages/nova/api/ec2/__init__.py(100)__call__()
-> rv = req.get_response(self.application)
  /usr/lib/python2.7/dist-packages/webob/request.py(1296)send()
-> application, catch_exc_info=False)
  /usr/lib/python2.7/dist-packages/webob/request.py(1260)call_application()
-> app_iter = application(self.environ, start_response)
  /usr/lib/python2.7/dist-packages/webob/dec.py(130)__call__()
-> resp = self.call_func(req, *args, **self.kwargs)
  /usr/lib/python2.7/dist-packages/webob/dec.py(195)call_func()
-> return self.func(req, *args, **kwargs)
  /opt/stack/venvs/nova/local/lib/python2.7/site-packages/nova/api/metadata/handler.py(115)__call__()
-> meta_data = self._handle_remote_ip_request(req)
  /opt/stack/venvs/nova/local/lib/python2.7/site-packages/nova/api/metadata/handler.py(136)_handle_remote_ip_request()
-> meta_data = self.get_metadata_by_remote_address(remote_address)
  /opt/stack/venvs/nova/local/lib/python2.7/site-packages/nova/api/metadata/handler.py(78)get_metadata_by_remote_address()
-> data = base.get_metadata_by_address(self.conductor_api, address)
  /opt/stack/venvs/nova/local/lib/python2.7/site-packages/nova/api/metadata/base.py(466)get_metadata_by_address()
-> fixed_ip = network.API().get_fixed_ip_by_address(ctxt, address)
  /opt/stack/venvs/nova/local/lib/python2.7/site-packages/nova/network/neutronv2/api.py(680)get_fixed_ip_by_address()
-> uuid_maps = self._get_instance_uuids_by_ip(context, address)
  /opt/stack/venvs/nova/local/lib/python2.7/site-packages/nova/network/neutronv2/api.py(582)_get_instance_uuids_by_ip()
-> data = neutronv2.get_client(context).list_ports(**search_opts)
> /opt/stack/venvs/nova/local/lib/python2.7/site-packages/nova/network/neutronv2/__init__.py(61)get_client()
-> if admin: