clusterTests.js

console.log('Start...');

var cluster = require('cluster');
console.log('required');

var isMaster = cluster.isMaster;
console.log('isMaster? ' + isMaster);

if (isMaster) {
    // Listen for dying workers
    cluster.on('exit', function (worker) {

        // Replace the dead worker,
        // we're not sentimental
        console.log('Worker ' + worker.id + ' died, replacing');
        cluster.fork();
    });

    console.log('Forking first worker');
    cluster.fork(); // if this is all we do, we hang around indefinitely?
} else {
    setTimeout(function () {
        throw new Error('dead');
    }, 3000);
}

console.log('EOF');