I'm having the same issue (in a proxy configuration)
The configuration check pass with "localhost" for all services apart from hdfs namenode.
All services also work apart from HDFS.
I tried using the localhost full host name (FQDN) but i then get the following error:
A problem has occured. Call From <host-name>/<host-IP> to <full-host-name>:<local-port> failed on connection exception
Possible cause:
- incorrect port or host address for: <full-host-name>:<local-port>
- Hadoop server is not running
Is there a workaround?