1.js

var cp = require('child_process'),
    net = require('net'),
    http = require('http');

if (process.argv[2] === 'normal') {
  var server = http.createServer(function(req, res) {
    res.end('hello');
  });
  console.log("webServer started on " + process.pid);
  process.on("message", function(msg,socket) {
    process.nextTick(function(){
      if(msg == 'c' && socket) {
        socket.readable = socket.writable = true;
        socket.resume();
        server.connections++;
        socket.server = server;
        server.emit("connection", socket);
        socket.emit("connect");
      }
    });
  });
  return;
}

// Server
var workers = [];
for (var i = 0; i < 4; i++) {
  workers.push(cp.fork('1.js', ['normal']));
}

var round = 0;
net.createServer(function(s) {
  s.pause();
  var worker = workers.shift();
  worker.send('c',s);
  workers.push(worker);
}).listen(8080);