node.js - process.nextTick(function() { throw err; }) rror: getaddrinfo ENOTFOUND noder noder:27017 - nodejs -

when first time hit http://localhost:8080, gives me correct response, shows below error too. when again hit http://localhost:8080, see nothing on ui.

d:\node_workspace\node-token-jwt\node_modules\mongodb\lib\server.js:242         process.nexttick(function() { throw err; })                                       ^ error: getaddrinfo enotfound noder noder:27017     @ errnoexception (dns.js:27:10)     @ getaddrinforeqwrap.onlookup [as oncomplete] (dns.js:78:26) 

i using node.js. how can fixed ?

server.js

// packages  var express     = require('express'); var app         = express(); var bodyparser  = require('body-parser'); var morgan      = require('morgan'); var mongoose    = require('mongoose');  var jwt    = require('jsonwebtoken'); // used create, sign, , verify tokens var config = require('./config'); // our config file var user   = require('./app/models/user'); // our mongoose model   var port = process.env.port || 8080; // used create, sign, , verify tokens mongoose.connect(config.database); // connect database app.set('supersecret', config.secret); // secret variable  // use body parser can info post and/or url parameters app.use(bodyparser.urlencoded({ extended: false })); app.use(bodyparser.json());  // use morgan log requests console app.use(morgan('dev'));  app.get('/', function(req, res) {     res.send('hello! api @ http://localhost:' + port + '/api'); });   app.listen(port); console.log('magic happens @ http://localhost:' + port); 

user.js

// instance of mongoose , mongoose.schema var mongoose = require('mongoose'); var schema = mongoose.schema;  // set mongoose model , pass using module.exports module.exports = mongoose.model('user', new schema({      name: string,      password: string,      admin: boolean  })); 

config.js

module.exports = {     'secret': 'ilovescotchyscotch',     'database': 'mongodb://noder:noderauth&54;proximus.modulusmongo.net:27017/test' }; 

package.json

{   "name": "node-token-jwt",   "main": "server.js",   "dependencies": {     "body-parser": "^1.15.2",     "express": "^4.14.0",     "jsonwebtoken": "^7.1.6",     "mongoose": "^4.5.7",     "morgan": "^1.7.0"   } }