From time to time, the test fails in the gate

I have no idea why but this has been happening periodically

2015-10-21 23:04:25.161 | 2015-10-21 23:04:25.160 | ======================================================================
2015-10-21 23:04:25.163 | 2015-10-21 23:04:25.161 | ERROR: proboscis.case.MethodTest (test_change_password_twice)
2015-10-21 23:04:25.164 | 2015-10-21 23:04:25.163 | ----------------------------------------------------------------------
2015-10-21 23:04:25.166 | 2015-10-21 23:04:25.164 | Traceback (most recent call last):
2015-10-21 23:04:25.167 | 2015-10-21 23:04:25.165 | File "/usr/local/lib/python2.7/dist-packages/proboscis/case.py", line 296, in testng_method_mistake_capture_func
2015-10-21 23:04:25.168 | 2015-10-21 23:04:25.167 | compatability.capture_type_error(s_func)
2015-10-21 23:04:25.170 | 2015-10-21 23:04:25.168 | File "/usr/local/lib/python2.7/dist-packages/proboscis/compatability/exceptions_2_6.py", line 27, in capture_type_error
2015-10-21 23:04:25.171 | 2015-10-21 23:04:25.170 | func()
2015-10-21 23:04:25.173 | 2015-10-21 23:04:25.171 | File "/usr/local/lib/python2.7/dist-packages/proboscis/case.py", line 350, in func
2015-10-21 23:04:25.174 | 2015-10-21 23:04:25.173 | func(test_case.state.get_state())
2015-10-21 23:04:25.176 | 2015-10-21 23:04:25.174 | File "/opt/stack/new/trove/trove/tests/api/user_access.py", line 221, in test_change_password_twice
2015-10-21 23:04:25.177 | 2015-10-21 23:04:25.176 | self.dbaas.users.change_passwords(instance_info.id, [user])
2015-10-21 23:04:25.180 | 2015-10-21 23:04:25.178 | File "/opt/stack/new/python-troveclient/troveclient/v1/users.py", line 119, in change_passwords
2015-10-21 23:04:25.181 | 2015-10-21 23:04:25.179 | resp, body = self.api.client.put(url, body=user_dict)
2015-10-21 23:04:25.182 | 2015-10-21 23:04:25.181 | File "/opt/stack/new/python-troveclient/troveclient/compat/client.py", line 246, in put
2015-10-21 23:04:25.184 | 2015-10-21 23:04:25.182 | return self._cs_request(url, 'PUT', **kwargs)
2015-10-21 23:04:25.185 | 2015-10-21 23:04:25.184 | File "/opt/stack/new/python-troveclient/troveclient/compat/client.py", line 231, in _cs_request
2015-10-21 23:04:25.187 | 2015-10-21 23:04:25.185 | return request()
2015-10-21 23:04:25.188 | 2015-10-21 23:04:25.186 | File "/opt/stack/new/python-troveclient/troveclient/compat/client.py", line 221, in request
2015-10-21 23:04:25.189 | 2015-10-21 23:04:25.188 | **kwargs)
2015-10-21 23:04:25.191 | 2015-10-21 23:04:25.189 | File "/opt/stack/new/python-troveclient/troveclient/compat/client.py", line 209, in _time_request
2015-10-21 23:04:25.192 | 2015-10-21 23:04:25.191 | resp, body = self.request(url, method, **kwargs)
2015-10-21 23:04:25.194 | 2015-10-21 23:04:25.192 | File "/opt/stack/new/python-troveclient/troveclient/compat/client.py", line 187, in request
2015-10-21 23:04:25.196 | 2015-10-21 23:04:25.194 | raise exceptions.from_response(resp, body)
2015-10-21 23:04:25.197 | 2015-10-21 23:04:25.195 | BadRequest: An error occurred communicating with the guest: _oslo_messaging_localcontext_52110c3d3d444e5283e7475644d17d11
2015-10-21 23:04:25.199 | 2015-10-21 23:04:25.197 | Traceback (most recent call last):
2015-10-21 23:04:25.200 | 2015-10-21 23:04:25.198 |
2015-10-21 23:04:25.202 | 2015-10-21 23:04:25.200 | File "/usr/local/lib/python2.7/dist-packages/oslo_messaging/rpc/dispatcher.py", line 142, in _dispatch_and_reply
2015-10-21 23:04:25.205 | 2015-10-21 23:04:25.202 | executor_callback))
2015-10-21 23:04:25.206 | 2015-10-21 23:04:25.205 |
2015-10-21 23:04:25.208 | 2015-10-21 23:04:25.206 | File "/usr/local/lib/python2.7/dist-packages/oslo_messaging/rpc/dispatcher.py", line 188, in _dispatch
2015-10-21 23:04:25.209 | 2015-10-21 23:04:25.208 | localcontext._clear_local_context()
2015-10-21 23:04:25.211 | 2015-10-21 23:04:25.209 |
2015-10-21 23:04:25.212 | 2015-10-21 23:04:25.211 | File "/usr/local/lib/python2.7/dist-packages/oslo_messaging/localcontext.py", line 85, in _clear_local_context
2015-10-21 23:04:25.214 | 2015-10-21 23:04:25.212 | delattr(_STORE, _KEY)
2015-10-21 23:04:25.216 | 2015-10-21 23:04:25.214 |
2015-10-21 23:04:25.217 | 2015-10-21 23:04:25.215 | AttributeError: _oslo_messaging_localcontext_52110c3d3d444e5283e7475644d17d11
2015-10-21 23:04:25.218 | 2015-10-21 23:04:25.217 | . (HTTP 400)