Forked child test

main.js

var cp = require('child_process');
var child = cp.fork(__dirname + '/worker');

child.on('message', function(m) {
  // Receive results from child process
  console.log('received: ' + m);
});

child.on("close", function(){
	console.log("The child process has terminated for no reason!")
})

process.on('uncaughtException', function (er) {
    console.error(er.stack)       
})

// Send child process some work
setInterval(function(){
	console.log("Sending message to worker...")
	child.send('Please upper-case this string')
},1000)

worker.js

console.log("I'm the child process (worker) and I have started and I should never terminate")

process.on('message', function(m) {
  // Do work  (in this case just up-case the string
  m = m.toUpperCase();

  // Pass results back to parent process
  process.send(m.toUpperCase(m));
});

process.on('disconnect', function() {
  console.log('Worker: I have been disconnected??!')
  process.exit(0);
});