Can't connect to mongodb

Question

I'm newbie about node.js and mongodb.

I have already installed mongodb, but I can't connect to mongodb.

This is my error:

Huys-MacBook-Pro:~ huy$ mongo
MongoDB shell version: 2.0.2
connecting to: test
Tue Jan  3 17:12:01 Error: couldn't connect to server 127.0.0.1 shell/mongo.js:84
exception: connect failed

Answer 1

First of all, check that your data folder exists : mongo on Win. That is

C:\> mkdir \data
C:\> mkdir \data\db

Answer 2

MongoDB is not running, and I have a wild guess that your mistake is this one: Trouble installing mongodb using Homebrew

Create the path /data/db and then try to start MongoDB again. (run mongod)

Answer 3

I also ran into this issue today. Mongo had been working fine up until this point. In case you try sudo service mongodb start and you find out the process is already running (start/running, process xxxx). The solution is:

Delete the lock file

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

and restart service again

sudo service mongodb start

Answer 4

if you are using windows version then

first run mongod in one cmd box

C:\> cd \my_mongo_dir\bin
C:\my_mongo_dir\bin> mongod

leave it open and now again tyep cmd and do the below

:\> cd \my_mongo_dir\bin
C:\my_mongo_dir\bin> mongo

Reference