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

Question

When ever I try to connect to mongo db I always get this error as below.

MongoDB shell version: 2.4.3 connecting to: test Fri Apr 26 14:31:46.941 JavaScript execution f

Answer 1

I had the same issue, In my case there was a mismatch of ipaddress in mongo config

~# mongo
MongoDB shell version: 2.6.7
connecting to: test
2015-02-02T17:48:52.302+0530 warning: Failed to connect to 127.0.0.1:27017, reason: errno:111 Connection refused
2015-02-02T17:48:52.303+0530 Error: couldn't connect to server 127.0.0.1:27017 (127.0.0.1), connection attempt failed at src/mongo/shell/mongo.js:146
exception: connect failed

When I checked my configuration file, I have specified the bind address to eth0 ip(10.8.10.111) not loopback address(127.0.0.1), So I have changed the ip address to loopback as like bind_ip = 127.0.0.1 in /etc/mongod.conf file and restart it with service mongod restart, finally works

# mongo 
MongoDB shell version: 2.6.7
connecting to: test
> 

Answer 2

This is due to locking of Mongodb
sudo rm /var/lib/mongodb/mongod.lock
sudo service mongodb restart

Answer 3

If any one is facing the problem in windows machine then follow the steps.

1. Add the path of mongodb in the environmental variable.
2. Create a directory C:\Data\db.
3. Open a terminal(cmd) and write mongod. (it will initiate the server).
4. Open another terminal and write your own code.

Answer 4

I met with this problem too. And I figured it out by the following way:

First, open the terminal and write

mongod --dbpath {your project's path}

Second, open a new terminal and enter your project's path, write

mongo

Then it runs successfully

Answer 5

with new version of mongodb, this issue got resolved.