mongo - couldn't connect to server 127.0.0.1:27017

Question

I am coming from riak and redis where I never had an issue with this services starting, or to interact.

This is a pervasive problem with mongo and am rather clueless

Answer 1

This was happening with me today and I resolved it in following way.

Machine: I'm using Windows 10 machine and downloaded the latest MongoDB - Community edition.

So, the problem was, I did not have C:\data\db created.

Without creating C:\data\db, I opened CMD terminal and started the database using mongod command at terminal

C:\YourInstallationPath\bin>mongod

And when I fired mongo command then I was getting the problem.

Twist, I created the necessary folders but still was getting the problem. And this is because mongo server was already running. To fix it, I fired up mongod command again, and it automatically referenced to C:\data\db.

Other users have suggested to add C:\data\db but did not talk about executing mongod again, which exactly solved my problem.

Answer 2

First, go to c:\mongodb\bin> to turn on mongoDB, if you see in console that mongo is listening in port 27017, it is OK If not, close console and create folder c:\data\db and start mongod again

Answer 3

I had the same error when connecting to Mongo on AWS EC2 . This is what solved it https://serverfault.com/a/347159/62381 Remove the bind_ip from the config file

Answer 4

Finally I got this is in a simple way..

open terminal and go to the mongodb location. In my case it is

e:\mongodb\bin> 

and type the following command and press enter..

mongod --config e:\mongodb\mongo.config

Open another terminal and start the mongodb using

mongo.exe

Thats it.. you can use mongo

Answer 5

Make sure that your mongo is running. I fixed this problem by trying to repair the mongodb, there I found that the directory required for the db to run was not created. It shows this error

Type: mongod, it will show the error

exception in initAndListen: 29 Data directory /data/db not found., terminating

Error happen because dbpath /data/db/ (default config) does not exist. You need to create data folder and set permission for it.

Then I create a folder on my system by the command

sudo mkdir -p /data/db/ and sudo chown id -u /data/db

then I run the mongo again and it worked.

Answer 6

MAC OS

Check status

brew services list

Something like:

Name    Status  User Plist
mongodb stopped  

start it

brew services start mongodb

Try it again

mongo or mongo --port 27017