node.js - MongoError: connect ECONNREFUSED 127.0.0.1:27017

Question

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 127.0.0.1:27017]

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');
  db.close();
});

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.

Answer 1

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.