Mongoose ECONNREFUSED Error (querySrv)

#database #javascript #networking #node

Many developers recently face this error while connecting to MongoDB Atlas using mongodb+srv://:

querySrv ECONNREFUSED _mongodb._tcp.<your-cluster>.mongodb.net

🔍 What this means

This error occurs when Node.js fails to resolve DNS SRV records, which are required for mongodb+srv:// connections.

Even if:

✅ MongoDB Atlas is configured correctly
✅ IP is whitelisted
✅ Credentials are correct

👉 The connection still fails due to DNS resolution issues.

✅

Solution (Working Fix)

Add the following at the very top of your server.js or index.js:

import dns from "dns";

// Force reliable DNS servers
dns.setServers(["8.8.8.8", "1.1.1.1"]);

import dns from "node:dns/promises";   
dns.setServers(["1.1.1.1", "1.0.0.1"]);