2016-06-20 16:43:06.939 20945 WARNING keystonemiddleware.auth_token [-] Using the in-process token cache is deprecated as of the 4.2.0 release and may be removed in the 5.0.0 release or the 'O' development cycle. The in-process cache causes inconsistent results and high memory usage. When the feature is removed the auth_token middleware will not cache tokens by default which may result in performance issues. It is recommended to use  memcache for the auth_token token cache by setting the memcached_servers option.
2016-06-20 16:43:06.939 20945 DEBUG keystonemiddleware.auth_token [-] Authenticating user token process_request /usr/local/lib/python2.7/dist-packages/keystonemiddleware/auth_token/__init__.py:495
2016-06-20 16:43:06.941 20945 DEBUG keystoneauth.identity.v2 [-] Making authentication request to http://10.0.0.21:35357/v2.0/tokens get_auth_ref /usr/local/lib/python2.7/dist-packages/keystoneauth1/identity/v2.py:63
2016-06-20 16:43:06.949 20945 INFO requests.packages.urllib3.connectionpool [-] Starting new HTTP connection (1): 10.0.0.21
2016-06-20 16:43:06.964 20945 DEBUG requests.packages.urllib3.connectionpool [-] "POST /v2.0/tokens HTTP/1.1" 401 114 _make_request /usr/local/lib/python2.7/dist-packages/requests/packages/urllib3/connectionpool.py:395
2016-06-20 16:43:06.965 20945 DEBUG keystoneauth.session [-] Request returned failure status: 401 request /usr/local/lib/python2.7/dist-packages/keystoneauth1/session.py:486
2016-06-20 16:43:06.966 20945 INFO keystonemiddleware.auth_token [-] Identity server rejected authorization

2016-06-20 16:43:06.973 20945 WARNING keystonemiddleware.auth_token [-] Identity response: {"error": {"message": "The request you have made requires authentication.", "code": 401, "title": "Unauthorized"}}
2016-06-20 16:43:06.973 20945 INFO keystonemiddleware.auth_token [-] Retrying validation
2016-06-20 16:43:06.973 20945 DEBUG keystoneauth.identity.v2 [-] Making authentication request to http://10.0.0.21:35357/v2.0/tokens get_auth_ref /usr/local/lib/python2.7/dist-packages/keystoneauth1/identity/v2.py:63
2016-06-20 16:43:07.004 20945 DEBUG requests.packages.urllib3.connectionpool [-] "POST /v2.0/tokens HTTP/1.1" 401 114 _make_request /usr/local/lib/python2.7/dist-packages/requests/packages/urllib3/connectionpool.py:395
2016-06-20 16:43:07.005 20945 DEBUG keystoneauth.session [-] Request returned failure status: 401 request /usr/local/lib/python2.7/dist-packages/keystoneauth1/session.py:486
2016-06-20 16:43:07.006 20945 INFO keystonemiddleware.auth_token [-] Identity server rejected authorization
2016-06-20 16:43:07.006 20945 WARNING keystonemiddleware.auth_token [-] Identity response: {"error": {"message": "The request you have made requires authentication.", "code": 401, "title": "Unauthorized"}}
2016-06-20 16:43:07.006 20945 CRITICAL keystonemiddleware.auth_token [-] Unable to validate token: Identity server rejected authorization necessary to fetch token data