Errr 'mongo.js:L112 Error: couldn't connect to server 127.0.0.1:27017 at src/mongo/shell/mongo.js:L112'

Question

I can\'t connect to MongoDB. In Ubuntu it works, but I\'m working in CentOS now. This is the error message:

MongoDB shell version: 2.4.2
connecting

Answer 1

Try to remove /var/lib/mongodb/mongod.lock and restart mongdo service

sudo rm /var/lib/mongodb/mongod.lock
sudo service mongodb restart

Answer 2

You also get this error if you've changed the default port for mongoDB in /etc/mongo.conf

To connect via the shell in this case use:-

$mongo 127.0.0.1:your_new_port_number

OR

$mongo -u <user> -p <pass> --host <host> --port your_new_port_number

from MongoDB docs