info - master started
  info - worker 0 spawned
  info - worker 1 spawned
  info - worker 2 spawned
  info - worker 3 spawned
  info - listening for connections
  info - worker 0 connected
  info - worker 2 connected
  info - worker 1 connected
  info - worker 3 connected
TTY:
true
  warning - kill(SIGKILL)
Error: EADDRINUSE, Address already in use
    at Server._doListen (net.js:1106:5)
    at net.js:1077:14
    at Object.lookup (dns.js:159:5)
    at Server.listen (net.js:1071:20)
    at Master.start (/Users/tj/Projects/cluster/lib/plugins/repl.js:65:21)
    at Master.emit (events.js:81:20)
    at Array.<anonymous> (/Users/tj/Projects/cluster/lib/master.js:323:12)
    at EventEmitter._tickCallback (node.js:126:26)
  debug - exit