我在 worker.js 里 console.log('ooxx')，在浏览器刷新页面会出现2~5条的ooxx，什么情况？ about pm HOT 13 CLOSED

var master = require('pm').createMaster({
  pidfile: __dirname + '/tmp/jenny.pid'
})

master.register('http', __dirname + '/app.js', {
  listen: 3000
})

master.on('giveup', function(name, num, pause) {
  console.log('Master giveup to restart "%s" process after %d times. pm will try after %d ms.', name, fatals, pause)
})

master.dispatch()

var express = require('express')
var mongoskin = require('mongoskin')
var app = express()

app.configure(function() {
  var db = mongoskin.db('xxxx', { safe: true })
  app.use(function(req, res, next) {
    req.db = db
    next()
  })
})

var http = require('http').createServer(app)
require('pm').createWorker().ready(function(socket, port) {
  http.emit('connection', socket)
  console.log(
    'Express server listening on port %d within %s environment.',
    port, app.get('env')
  )
})

var express = require('express')
var mongoskin = require('mongoskin')
var app = express()

app.configure(function() {
  var db = mongoskin.db('xxxx', { safe: true })

  console.log('MongoDB connected')

  app.use(function(req, res, next) {
    req.db = db
    next()
  })
})

var http = require('http').createServer(app)
require('pm').createWorker().ready(function(socket, port) {
  http.emit('connection', socket)
})

console.log(
  'Express server listening on port %d within %s environment.',
  3000, app.get('env')
)