MongoError: connect ECONNREFUSED

1 min readDec 7, 2022


I’m using NodeJS wih MongoDB using mongodb package. When I run mongod command it works fine and gives “waiting for connection on port 27017”. So, mongod seems to be working. But MongoClient does not work and gives error when I run node index.js command-

MongoError: failed to connect to server [localhost:27017] on first connect [MongoError: connect ECONNREFUSED]

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I have install mongo db 3.4 and my code is-

var MongoClient = require(‘mongodb’).MongoClient;
var dburl = “mongodb://localhost:27017/test”;
MongoClient.connect(dburl, function(err, db) {
if (err) {
throw err;
console.log(‘db connected’);

I have created data/db directories on root and given write permissions. mongod.conf file takes db path as-

storage: dbPath: /var/lib/mongo

But it seems that it is actually taking db path as data/db and not var/lib/mongo

It working earlier but suddenly stopped.

Solution is

This happened probably because the MongoDB service isn’t started. Follow the below steps to start it:

  1. Go to Control Panel and click on Administrative Tools.
  2. Double click on Services. A new window opens up.
  3. Search MongoDB.exe. Right click on it and select Start.

The server will start. Now execute npm start again and the code might work this time.

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