anchor.diff:      % config a chance to settle before notifying clients.
       {ok, _Tref} = timer:send_after(?NODE_CHANGE_DELAY, notify_clients),
       %% Have every known node ping this new node.
  -    rpc:multicall(net_adm, ping, [Node]),
  +    spawn_link(fun () -> rpc:multicall(net_adm, ping, [Node]) end),
       {noreply, State};
   
   handle_info({nodedown, Node}, State) ->
  
positive.code: 
  init([]) ->
      error_logger:info_msg("Initting ns_node_disco with ~p~n", [nodes()]),
      % Proactively run one round of reconfiguration update.
      ok = misc:wait_for_process(do_nodes_wanted_updated(do_nodes_wanted()),
                                ?SYNC_TIMEOUT),
      % Register for nodeup/down messages as handle_info callbacks.
      ok = net_kernel:monitor_nodes(true),
      {ok, Timer} = timer:send_interval(?PING_FREQ, ping_all),
  
negative.code:     {noreply, State2};
  
  handle_info(ping_all, State) ->
      spawn_link(fun ping_all/0),
      {noreply, State};
  
  handle_info(_Msg, State) -> {noreply, State}.
  