anchor.diff:      Node = (catch list_to_existing_atom(NodeArg)),
       case Node of
           undefined ->
  -            reply_text(Req, "No server specified.", 400),
  -            error;
  +            {error, "No server specified."};
           _ when not is_atom(Node) ->
  -            reply_text(Req, "Unknown server given.", 400),
  -            error;
  +            {error, "Unknown server given."};
           _ ->
               {ok, Node}
       end.
  
positive.code:                 in_recovery ->
                      reply_text(Req, "Cluster is in recovery mode.", 503)
              end;
          error ->
              ok
      end.
  
  handle_start_graceful_failover(Req) ->
  
negative.code:                 {Code, Text} ->
                      reply_text(Req, Text, Code)
              end;
          {error, ErrorMsg} ->
              reply_text(Req, ErrorMsg, 400)
      end.
  
  handle_rebalance(Req) ->
  