MongoDB Atlas connection keeps dropping

Question

I've integrated MongoDB atlas to my nodejs application, but the connection keeps dropping every few hours, which is forcing the app to restart. Is there a away to handle reconnections in the code to avoid restart of the app ?

{ MongoNetworkError: connection 2 to 67.156.445.93:27017 closed at (anonymous function).forEach.op (/home/ubuntu/app/node_modules/mongodb/lib/cmap/connection.js:63:15) at Map.forEach () at TLSSocket.Connection.stream.on (/home/ubuntu/app/node_modules/mongodb/lib/cmap/connection.js:62:20) at TLSSocket.emit (events.js:203:15) at _handle.close (net.js:607:12) at TCP.done (_tls_wrap.js:388:7) name: 'MongoNetworkError', [Symbol(mongoErrorContextSymbol)]: { isGetMore: true } }

Code:

 const log = console.log; const mongoose = require('mongoose'); const link = ' URL of MONGOATLAS DB'; const connectDB = async () => { mongoose.connect(link, { useNewUrlParser: true, useUnifiedTopology: true }); mongoose.connection.on('connected',() => { log(`MongoDB connection successful!`); }); mongoose.connection.on('error',(err) => { log(`MongoDB connection error => ${err}!`); }); mongoose.connection.on('disconnected', () => { log(`MongoDB connection diconnected`); }); } module.exports = connectDB;

Answer 1

Have a file called database.js. Inside it, put this code:

 const mongoose = require("mongoose"); const db = "mongodb://localhost:27017/yourDbName" //Or use atlas url. const connectDB = async () => { try { await mongoose.connect(db, { useNewUrlParser: true, useUnifiedTopology: true, useCreateIndex: true, useFindAndModify: false }); console.log("Mongo db Connected !"); } catch (err) { console.log(err.message); //exit process with failure process.exit(1); } }; module.exports = connectDB;

In your server.js or index.js:

 const connectDB = require("./database.js");