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.

Go inside location C:\Program Files\MongoDB\Server\3.4\bin and run mongod.exe and try again — chetan mekha, Oct 02 '17 at 10:16
replace localhost with 127.0.0.1 and try. not sure about the result but try and update us. and also try with running below command from terminal ,sudo service mongod start — chetan mekha, Oct 02 '17 at 10:24
I already tried this, didn't work. sudo service mongod start gives error- Starting mongod (via systemctl): Job for mongod.service failed because the control process exited with error code. See "systemctl status mongod.service" and "journalctl -xe" for details. — Deepika P., Oct 02 '17 at 10:26
I am really surprised how many answer provide a **Windows** solution (and they are even top rated) despite this question clearly refers to Linux. — Wernfried Domscheit, Apr 11 '21 at 07:55
This happened to me when I forgot to start the docker instance I was using with mongo. — Charlotte_Anne, Jun 30 '21 at 18:37
Try manually stopping the server and starting again. I also faced the same problem on my Mac M1. Although mongodb was running but the mongoose could not connect to it. — Harshit Gangwar, Nov 14 '21 at 10:01

score 151 · Answer 1 · answered May 29 '19 at 07:05

151

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

Go to Control Panel and click on Administrative Tools.
Double click on Services. A new window opens up.
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.

answered May 29 '19 at 07:05

Sonu Sourav

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For windows 10 path is Control Panel\System and Security\Administrative Tools – armin Aug 29 '21 at 18:42
you saved my life – Coder Sep 01 '21 at 13:08
Save my life............ – Jency Apr 14 '22 at 04:45

score 41 · Answer 2 · answered Dec 29 '21 at 09:14

41

My apps stopped working after upgrading from Nodejs 14 to 17.

The error I got was

MongoServerSelectionError: connect ECONNREFUSED ::1:27017

The solution was simply replacing localhost by 0.0.0.0. I.e. in my source code I had to change

const uri = "mongodb://localhost:27017/";
const client = new MongoClient(uri);

to

const uri = "mongodb://0.0.0.0:27017/";
const client = new MongoClient(uri);

I am posting this as an answer because I couldn't find the solution anywhere on the Internet and I wasted a lot of time on this one...

answered Dec 29 '21 at 09:14

Page not found

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5
12

2

MongoDB seems to be not compatible with NodeJS v17. It should be listening on IPv6 "::1" by default and it would work with v17 without any problem. – TJJ Jan 05 '22 at 22:16
What makes `mongodb://0.0.0.0:27017/` ?, try to connect to every ip? – elVengador Feb 08 '22 at 23:43
3

for me replacing localhost with 127.0.0.1 worked, thanks! – Patronics Mar 20 '22 at 23:52
Thanks a lot, brother. Can you please tell me why this error occurred? why localhost is not working – Md. Maruf Sarker Mar 21 '22 at 13:45

score 18 · Answer 3 · answered Oct 11 '17 at 23:38

18

For windows - just go to Mongodb folder (ex : C:\ProgramFiles\MongoDB\Server\3.4\bin) and open cmd in the folder and type "mongod.exe --dbpath c:\data\db"

if c:\data\db folder doesn't exist then create it by yourself and run above command again.

All should work fine by now.))

answered Oct 11 '17 at 23:38

Farid Ansari

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@nikhilsugandh - really? The screenshot clearly shows a Linux environment, not Windows. – Wernfried Domscheit Apr 11 '21 at 07:53

score 14 · Answer 4 · answered Nov 25 '19 at 20:43

14

I've forgot to start MongoDB at all. Go to separate tab in terminal and type:

sudo service mongod start

answered Nov 25 '19 at 20:43

matrixb0ss

485
5
9

score 11 · Answer 5 · answered Dec 10 '20 at 10:32

For Windows users.

This happens because the MondgDB server is stopped. to fix this you can,

1 search for Services ,for that search using the left bottom corner search option.

2 then there is a gear icon named with 'Services'.

3 after clicking that you will get a window with lot of services

4 scroll down and you will find 'MongoDB server (MongoDB)'.

5 so you will see that there is an option to start the service.

6 start it.
1 then open your command prompt.

2 type mongod

now you can connect to your server.

this steps also working fine if your sql server service down. (find sql server services)

thanks , worked for me . i just started this option 'MongoDB server (MongoDB) — RoshJ, Feb 09 '21 at 09:45

score 9 · Answer 6 · answered Oct 02 '17 at 15:15

9

Try to start mongoDB server by giving the --dbpath with mongod.

sudo mongod --dbpath /var/lib/mongo/data/db &

'&' in the last will start the mongodb server as service on your server.

Hope it Works.

answered Oct 02 '17 at 15:15

Nitin Bhanderi

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2
8

score 9 · Answer 7 · answered Sep 18 '19 at 21:33

I had below error:

Error: connect ECONNREFUSED 127.0.0.1:27017

In my case, this issue occurred since MongoDB is not installed at all.

The solution was to install MongoDB from below location:
https://www.mongodb.com/download-center/community

After installing the ECONNREFUSED error did not appear again.

Hope that helps.

score 9 · Answer 8 · answered May 05 '21 at 10:38

9

Search services.msc in your device and click start to run the mongoDB server

After started running MongoDB server you will able to run your program

answered May 05 '21 at 10:38

lahiru dilshan

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score 7 · Answer 9 · answered May 01 '20 at 14:01

7

For Ubuntu users run sudo systemctl restart mongod

answered May 01 '20 at 14:01

U.A

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score 6 · Answer 10 · answered May 17 '20 at 12:14

6

I had the same error because i had not installed mongoDB. Make sure that you have mongodb installed and if not, you can download it from here https://www.mongodb.com/download-center/community

answered May 17 '20 at 12:14

Wamala Emmanuel Nsubuga

99
1
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If you have it installed and are still having said problem, you forgot to start the services – Avshalom N. Israel May 21 '20 at 10:50
2

"install mongodb" is not an answer for sure...people who post this are users of MongoDB. – Sherebyah Tishbi May 28 '20 at 20:25

score 6 · Answer 11 · answered Aug 24 '20 at 21:31

6

Press CTRL+ALT+DELETE/task manager , then go to services , find MongoDB , right click on it. start. go back to terminal . npm start it will work.

answered Aug 24 '20 at 21:31

Doniyor Boltayev

61
1
1

easy solution, it works on my windows 10. thank you – Mohammad Shohag May 18 '22 at 10:14

score 5 · Answer 12 · answered Dec 17 '20 at 08:23

5

On a mac I had to run brew services start mongodb-community@4.4

Check: Install MongoDB Community Edition on macOS

answered Dec 17 '20 at 08:23

Fotios Tsakiris

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10
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score 5 · Answer 13 · answered Jan 22 '21 at 15:13

For Windows users: Mongo version 4.4 Use following commands: NET STOP MONGODB – To stop MongoDB as a service,if this returns "mongoDb service is not running then use below command to start service" NET START MONGODB – To start MongoDB as a service.

This worked for me.

krnitheesh16 · Answer 14 · 2022-05-05T13:22:41.253

If you already installed "MongoDB", if you accidentally exit from the MongoDB server, then "restart your system".

This method solved for me...

[On Windows only]

And also another method is there:

press:

Windows + R

type:

services.msc

and click "ok", it opens "services" window, and then search for "MongoDB Server" in the list. After you find "MongoDB Server", right-click and choose "start" from the pop-up menu.

The MongoDb Server will start running.

Hope it works!!

score 4 · Answer 15 · answered Dec 13 '20 at 11:39

4

just start the mongo server from terminal

Ubuntu -

     sudo systemctl start mongod

answered Dec 13 '20 at 11:39

Sahil

53
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thx matte. in my case, I was forgetting to run it as `sudo`. – bkupfer Aug 04 '21 at 17:32
Solved my problem on Ubuntu 20 – XpressGeek Jan 01 '22 at 08:44

score 4 · Answer 16 · answered Dec 25 '21 at 15:47

4

I just found a solution in the internet , If you are using latest nodejs (v17.x) , then try updating mongodb url from localhost to 127.0.0.1

ref: https://www.mongodb.com/community/forums/t/mongooseserverselectionerror-connect-econnrefused-127-0-0-1-27017/123421/3

answered Dec 25 '21 at 15:47

hariom nagar

140
4

Saved my day, thank you – O. Shai Dec 29 '21 at 00:04

score 2 · Answer 17 · answered Sep 22 '20 at 01:29

2

I was facing the same issue on windows 10. I just uninstall MongoDB and installed it again and it started working. It solved my problem.

answered Sep 22 '20 at 01:29

yogesh patel

21
1

It is better to comment on your short answers and ideas like other friends – mohammad javad ahmadi Sep 22 '20 at 04:54
This is because the service was disabled. Just open Services > Enable and Start mongod service. You can achieve the same using the command line. Just consult the documentation for exact syntax. – Page not found Jan 05 '22 at 23:28

score 1 · Answer 18 · answered May 01 '19 at 11:55

most probably your mongo db service is not started. For ubuntu : sudo service mongod start For windows : go to services and start the MongoDB service

also install link for mondoDB service https://www.mongodb.com/download-center/community

I had this problem and i solved it thanks to this man's answer https://stackoverflow.com/a/47433551/7917608

score 1 · Answer 19 · answered Nov 09 '20 at 05:01

I was having the same problem today.. and has been searching for answers.. I am on Ubuntu... however, I could not find the correct one that works on this thread.. after much research the following worked for me finally!! :)

First, after running

mongod dbpath

if appeared that mongodb was looking for the data/db directory.. which was missing in my installed mongodb app.. so I ran the following commands:

$ sudo mkdir -p /data/db

then run,

$ sudo chown -R $USER /data/db

chown - changes ownership of files/dirs. Ie. owner of the file/dir changes to the specified one, but it doesn't modify permissions. As detailed here: https://unix.stackexchange.com/questions/402062/how-are-chown-and-chmod-command-different-in-the-given-operation

Finally, run

`$ sudo systemctl enable mongod.service

It will give a message: Created symlink /etc/systemd/system/multi-user.target.wants/mongod.service → /lib/systemd/system/mongod.service and started the service.

score 0 · Answer 20 · answered Feb 27 '19 at 05:26

I had the same issue on Windows.

Ctrl+C to close mongod, and start mongod again.

Am not sure, but it seems that initially mongod was working opening and closing connections. Then, it was not able to close some earlier connections and reached limit for opened ones. After restarting mongod, it works again.

score 0 · Answer 21 · answered Jun 07 '19 at 07:58

0

You probably need to continue running your DB process (by running mongod) while running your node server.

answered Jun 07 '19 at 07:58

otoloye

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score 0 · Answer 22 · answered Apr 26 '20 at 07:06

0

Please ensure that your mongo DB is set Automatic and running at Control Panel/Administrative Tools/Services like below. That way you wont have to start mongod.exe manually each time.

answered Apr 26 '20 at 07:06

wise king

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that has nothing to do with the OPs question. – Alexander Köb Apr 26 '20 at 14:39

score 0 · Answer 23 · answered Jun 12 '20 at 08:55

0

The solution was to install MongoDB from below location: https://www.mongodb.com/download-center/community

answered Jun 12 '20 at 08:55

Anonymous Unknown

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From Review: Hi, this post does not seem to provide a [quality answer](https://stackoverflow.com/help/how-to-answer) to the question. Please either edit your answer to explain why your solution works, or just post it as a comment to the question. – sɐunıɔןɐqɐp Jun 12 '20 at 09:39

score 0 · Answer 24 · answered Aug 09 '20 at 12:22

0

because you didn't start mongod process before you try starting mongo shell.

Start mongod server

mongod

Open another terminal window

Start mongo shell

mongo

answered Aug 09 '20 at 12:22

Mohit Rakhade

305
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this is only for windows machine – Mohit Rakhade Aug 09 '20 at 12:24

score 0 · Answer 25 · answered Nov 04 '20 at 09:52

In my particular instance, I was connected to a VPN and that was blocking the localhost connection to MongoDB somehow. It worked when I disconnected my VPN. It's a special case, but good to know nonetheless. So anything impeding your network connectivity, Get that fixed.

score 0 · Answer 26 · answered Sep 03 '21 at 12:47

0

If you are on WSL and trying to access MongoDB from Windows, then you have to install Mongo for WSL.

answered Sep 03 '21 at 12:47

Gabriel Arghire

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score 0 · Answer 27 · answered Jan 08 '22 at 08:55

I debugged this same error on my own for over 5 hours. Eventually it worked out for me. Below is a check list of items to make sure they are correct before using Mongoose.

MongoDB is installed on your system
MongoDB is running as a service before you use 'npm run start'
The mongoose code does not have any syntax errors
Use promises (.then()) in the connect function for mongoose
If you are using 'localhost' in URL, try switching it with '0.0.0.0' or vice versa

Once you have done all this, run the command 'node run start' and hopefully this should work now. To verify, go to mongoDB and see the newly created database.

Below is a sample code for MongoDB and Mongoose that worked for me.

const mongoose = require('mongoose');

const myFunc = () => {
    const userSchema = mongoose.Schema({
        name: String
    });

    const User = mongoose.model("User", userSchema);

    const userObject = new User({
        name: 'Abhishek'
    });

    userObject.save((err, data) => {
        if (err)
            console.log('Error in saving = ' + err);
        if (data)
            console.log('Saved to DB = ' + data)
    }
    );
};

mongoose
    .connect("mongodb://0.0.0.0/userdb")
    .then(myFunc(), err => console.log(`Error = ${err}`));

score 0 · Answer 28 · answered Jan 10 '22 at 10:23

I got this issue with Node.js v17 under Windows.
Found the issue open on mongoose github with some solutions: https://github.com/Automattic/mongoose/issues/10917

I had to either use 127.0.0.1 instead of localhost in the mongoose.connect function, which worked.

Or edit the config file with admin rights notepad. Open admin cmd, go to C:\Program Files\MongoDB\Server\5.0\bin folder, enter command notepad mongod.cfg then edit:

net:
  port: 27017
  ipv6: true

I had to remove bindIp: 127.0.0.1, leaving only port and ipv6, otherwise database wouldn't connect even with ipv6: true. Then restart mongodb service with windows task manager -> services -> mongodb, and using localhost would work.

Apparently using mongod://0.0.0.0:27017/ is not safe: mongodb.conf bind_ip = 127.0.0.1 does not work but 0.0.0.0 works

Mohamed Ahmed · Answer 29 · 2022-01-16T09:31:39.137

0

Check where your .sock file is located. For my case, it was in /tmp folder.

Then run the following commands.

chown mongodb:mongodb /tmp/mongodb-27017.sock

sudo systemctl start mongod

mongosh

This worked for me.

For more reference

edited Jan 16 '22 at 09:31

answered Jan 16 '22 at 09:24

Mohamed Ahmed

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score 0 · Answer 30 · answered Mar 08 '22 at 04:47

0

click window key + r key
type services.msc and press ok
wait open service
search mongodb
click right key and start press

and reopen mongodb

answered Mar 08 '22 at 04:47

Nurul

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score 0 · Answer 31 · answered May 31 '22 at 17:34

0

If you use MongoDb Compass make sure that you have installed MongoDB Community Server.

answered May 31 '22 at 17:34

akbar

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score -2 · Answer 32 · answered Jun 06 '20 at 14:22

-2

If you are a windows user, right click on Start and open Windows Powershell(Run as administartor). Then type

mongod

That's it. Your database will surely get connected!

answered Jun 06 '20 at 14:22

Arunesh Naha

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He already has said that he is not a windows user and is on an Amazon linux instance. – Hoppo Jun 06 '20 at 14:53

MongoError: connect ECONNREFUSED 127.0.0.1:27017

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