gistfile1.js

var cluster         = require('cluster'),
    nrCPUs          = require('os').cpus().length;

//when we are the master
if (cluster.isMaster) {

    //fork workers (one for each CPU)
    for (var i = 0; i < nrCPUs; i++) {
        spawnWorker();
    }

    //respawn on death
    cluster.on('death', respawnWorker);

    //stop respawning when we are quitting
    process.once('exit', function() {
        cluster.removeListener('death', respawnWorker);
    });

    function respawnWorker() {
        
        //respawn worker
        spawnWorker();

    }

    function spawnWorker() {

        //fork a worker
        var worker = cluster.fork();

        //tell worker to quit on exit
        process.on('exit', function() {
            console.log('I NEVER FIRE'); //why does this never fire?
            worker.send('SIGQUIT');
        });

    }

}
else {

    //load the worker logic here

}