express - mongodb connection issue - node.js

Question

I setup a cluster in my mongodb atlas database and to my best of knowledge i did everything right and copied the right to my application using sample_mflix database
in my .env file
MOVIEREVIEWS_DB_URI=mongodb+srv://driiisdev:password123#cluster1.ektx7.mongodb.net/sample_mflix?retryWrites=true&w=majority
PORT=5000 //starting port of server
in my index.js file
import app from "./server.js"
import mongodb from "mongodb"
import dotenv from "dotenv"
dotenv.config();
const uri = process.env.MOVIEREVIEWS_DB_URI;
const client = new mongodb.MongoClient(uri);
const port = process.env.PORT||8000;
(async ()=>{
try{
//Connect to the MongoDB cluster
await client.connect();
app.listen(port, ()=>{
console.log("server is running on port:" +port);
})
}catch(e){
console.error(e);
process.exit(1)
}
})().catch(console.error);
in my server.js
import express from 'express'
import cors from 'cors'
import movies from './api/movies.route.js'
const app = express()
app.use(cors())
app.use(express.json())
app.use("/api/v1/movies", movies)
app.use('*', (req,res)=>{
res.status(404).json({error:"not found"})
})
export default app
on running nodemon server , the error i get
Error: querySrv ECONNREFUSED _mongodb._tcp.cluster1.ektx7.mongodb.net
at QueryReqWrap.onresolve [as oncomplete] (node:dns:213:19) {
errno: undefined,
code: 'ECONNREFUSED',
syscall: 'querySrv',
hostname: '_mongodb._tcp.cluster1.ektx7.mongodb.net'
}

Answer 1

The error indicates a possible SRV lookup failure.
Could you try using the connection string from the connection modal that specifies all 3 hostnames instead of the SRV record? To get this, please head to the Atlas UI within the Clusters section and follow the below steps:
Click Connect on the cluster you wish to connect to
Select Connect your application
Choose Node.JS for the Driver option
Choose the *Version 2.2.12 or later for the version option
Copy and use the connection string which should begin with the following format:
mongodb://:....
Replace the original connection string you used with the version 2.2.12 or later node.js connection string copied from the above steps and then restart your application.
//also in the .env file
// remove the comment after the PORT is assigned, as .env reads comment and will return error
PORT=5000