debugging with nodetime

console.log

nodetime v0.8.11: sent message(s) to server
nodetime v0.8.11: sent message(s) to server

nodetime v0.8.11 error: [TypeError: Cannot read property '0' of undefined] TypeError: Cannot read property '0' of undefined
    at net.js:656:34
    at Array.forEach (native)
    at Socket.self [as bytesWritten] (net.js:654:16)
    at /home/ec2-user/ModelT/node_modules/nodetime/lib/probes/net-probe.js:40:35
    at Socket.obj.(anonymous function) [as write] (/home/ec2-user/ModelT/node_modules/nodetime/lib/core/proxy.js:39:9)
    at Connection.write (/home/ec2-user/ModelT/node_modules/mongoose/node_modules/mongodb/lib/mongodb/connection/connection.js:215:31)
    at __executeQueryCommand (/home/ec2-user/ModelT/node_modules/mongoose/node_modules/mongodb/lib/mongodb/db.js:1495:16)
    at Db._executeQueryCommand (/home/ec2-user/ModelT/node_modules/mongoose/node_modules/mongodb/lib/mongodb/db.js:1708:3)
    at Db.obj.(anonymous function) [as _executeQueryCommand] (/home/ec2-user/ModelT/node_modules/nodetime/lib/core/proxy.js:45:19)
    at Cursor.nextObject (/home/ec2-user/ModelT/node_modules/mongoose/node_modules/mongodb/lib/mongodb/cursor.js:649:13)

simplified-cluster.js

#!/usr/bin/env node

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

if (cluster.isMaster) {
  // Fork workers.
  for(var i = 0; i < numCPUs; i++) {
    worker = cluster.fork();
  }
} else {

  require('nodetime').profile({
      accountKey: '<my api key here>'
    , appName: '<app name here>'
    , debug: true
  });

  var app = require('..')
  app.start();
}