Make sure you at least got this points correct when trying to upgrade: 1. require('sys') throws, use require('util') now. The "sys" module was deprecated in no

Make sure you at least got this points correct when trying to upgrade: 1. require('sys') throws, use require('util') now. The "sys" module was deprecated in node v0.4. 2.cluster.fork() no longer return a child_process.fork() object use cluster.fork().process to get the object. 3.the 'death' event on the cluster object is renamed to 'exit'