unable to execute "cinder quota*" commands.

Issue

• unable to execute "cinder quota*" commands.

[root@rhos8 ~(keystone_admin)]# cinder service-list
+------------------+-----------+------+---------+-------+----------------------------+-----------------+
|      Binary      |    Host   | Zone |  Status | State |         Updated_at         | Disabled Reason |
+------------------+-----------+------+---------+-------+----------------------------+-----------------+
|  cinder-backup   |   rhos8   | nova | enabled |   up  | 2016-10-24T15:36:17.000000 |        -        |
| cinder-scheduler |   rhos8   | nova | enabled |   up  | 2016-10-24T15:36:17.000000 |        -        |
|  cinder-volume   | rhos8@lvm | nova | enabled |   up  | 2016-10-24T15:36:18.000000 |        -        |
+------------------+-----------+------+---------+-------+----------------------------+-----------------+

[root@rhos8 ~(keystone_admin)]#  cinder quota-show admin
ERROR: The server has either erred or is incapable of performing the requested operation. (HTTP 500) (Request-ID: req-acea1eca-ad99-4306-94cf-d964f2e9c826)


[root@rhos8 ~(keystone_admin)]#  cinder --debug quota-show admin
DEBUG:keystoneclient.session:REQ: curl -g -i -X GET http://192.168.122.105:5000/v2.0 -H "Accept: application/json" -H "User-Agent: python-keystoneclient"
DEBUG:keystoneclient.session:RESP: [200] content-length: 231 content-encoding: gzip vary: X-Auth-Token,Accept-Encoding server: Apache/2.4.6 (Red Hat Enterprise Linux) connection: close date: Mon, 24 Oct 2016 15:31:19 GMT content-type: application/json x-openstack-request-id: req-b70e7f11-49e9-4884-ac32-f7b34010723b 
RESP BODY: {"version": {"status": "stable", "updated": "2014-04-17T00:00:00Z", "media-types": [{"base": "application/json", "type": "application/vnd.openstack.identity-v2.0+json"}], "id": "v2.0", "links": [{"href": "http://192.168.122.105:5000/v2.0/", "rel": "self"}, {"href": "http://docs.openstack.org/", "type": "text/html", "rel": "describedby"}]}}

DEBUG:keystoneclient.auth.identity.v2:Making authentication request to http://192.168.122.105:5000/v2.0/tokens
DEBUG:keystoneclient.session:REQ: curl -g -i -X GET http://192.168.122.105:8776/v2/ea39022238084e03a02441451dbb0466/os-quota-sets/admin?usage=False -H "User-Agent: python-cinderclient" -H "Accept: application/json" -H "X-Auth-Token: {SHA1}4a45f03497316ed51ddaad42c0229f8a201ecb75"
DEBUG:keystoneclient.session:RESP: [500] content-length: 128 x-compute-request-id: req-84a949c4-5650-4f50-95eb-beb82df4fbef connection: keep-alive date: Mon, 24 Oct 2016 15:31:19 GMT content-type: application/json; charset=UTF-8 x-openstack-request-id: req-84a949c4-5650-4f50-95eb-beb82df4fbef 
RESP BODY: {"computeFault": {"message": "The server has either erred or is incapable of performing the requested operation.", "code": 500}}

ERROR: The server has either erred or is incapable of performing the requested operation. (HTTP 500) (Request-ID: req-84a949c4-5650-4f50-95eb-beb82df4fbef)