Remote execution jobs are failing with error: SocketError getaddrinfo: Name or service not known on Satellite server.

Issue

• Remote Execute fails with error: SocketError getaddrinfo: Name or service not known.

• From Satellite WEB UI downflow console below error is observed:

   metadata:
  timeout: '2017-05-19 16:06:16 +0400'
  proxy_task_id: 8648573526-c892-42da-a228-d5e20938577a
   proxy_output:
  result:
  - output_type: debug
  output: |-
       Error initializing command #
      SocketError getaddrinfo: Name or service not known
     timestamp: 1502712316.9726257
     exit_status: EXCEPTION
  

• Remote job fails with error message:

   1: Error initializing command #
   2: SocketError getaddrinfo: Name or service not known
   3: Exit status: EXCEPTION
  

• REX jobs failing with error:

  PLAY [all] 
  *********************************************************************
  
  TASK [Gathering Facts] 
  *********************************************************
  fatal: [client.redhat.com]: UNREACHABLE! => {"changed": false, "msg": 
  "Failed to connect to the host via ssh: ssh: Could not resolve hostname client.redhat.com: Name or service not known", "unreachable": true}
  to retry, use: --limit @/tmp/foreman-playbook-79716c3a-378a-4a96-b4b0-0fa9cb6624c8.retry
  
  PLAY RECAP *********************************************************************
  client.redhat.com    : ok=0    changed=0    unreachable=1    failed=0   
  
  Exit status: 4