While conencting mongoDb with application facing issue : "UnhandledPromiseRejectionWarning: MongooseServerSelectionError: connect ECONNREFUSED 127.0.0.1:27017"

Tried Solutions :

1. Reinstalling mongoDb
2. Restarting the mongoDb service from control panel services.

Code :

var express = require('express');
var app = new express();
var bodyParser = require('body-parser')
var mongoose = require('mongoose')
var user = require('./model/user')
const hostname = '127.0.0.1';
const port = 3000;
var router = express.Router();
mongoose.connect('mongodb://localhost:27017/userdb', { useNewUrlParser: true });
var users = [{ name: "Jane", age: 20 }, { name: "Mark", age: 40 }, { name: "Janefer", age: 40 }]
app.use(bodyParser.urlencoded({ extended: true }))//converts it into obj

router.route('/users')
    .get((req, res) => {
        //fetch record from users collectiobn
        user.find({}, (err, users) => {
            if (err) {
                res.json({ msg: 'error in fetching data from DB' })
            }
            else {
                res.json(users)
            }
        })
        // res.json(users)
    })
    .post((req, res) => {

    })
app.use('/api', router)//middleware to direct all req 
app.listen(port, hostname, () => {
    console.log("Server listening on 3000")
})

Error screenshot :

enter image description here

CodePudding user response：

you can try to check which port mongodb is using in your mongodb.conf after that if you still are have problem you can run the command ps aux | grep mongo and post the result.

CodePudding user response：

Instead of [localhost] use [127.0.0.1]. like this - 'mongodb://127.0.0.1:27017/userdb'