execute the "nova secgroup-list" error
when I execute the "nova secgroup-list",
the error message is: ERROR (ClientException): The server has either erred or is incapable of performing the requested operation. (HTTP 500) (Request-ID: req-6fd7098f-c213-4c71-84e1-fbd22bc380b7)
I check the nova-api.log file,I can see the error message: ConnectionFailed: Connection to neutron failed: HTTPConnectionPool(host='127.0.0.1', port=9696): Max retries exceeded with url: /v2.0/security-groups.json?tenant_id=0d185bb98e79495c9a0f5f2f480595dc (Caused by <class 'socket.error'="">: [Errno 111] ECONNREFUSED)