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

Same error here, this worked for me:

sudo mongod --repair

followed by

sudo mongod

(forget about service and start)

Then on a different tab/terminal:

mongo

Answer 2

If you create data\db folder, firstly you must delete this folder then execute:

c:\mongodb\bin\mongo.exe 

Answer 3

If you are on unix-like systems.

Starting in MongoDB 4.4, a startup error is generated if the ulimit value for number of open files is under 64000. View the current val

$ ulimit -n

Change value

$ ulimit -n <val>

Answer 4

I had the same issue until i close teamviewer running on my pc. Then it worked fine!

Answer 5

Quick Fix: I have the same problem to start the MongoDB and it was easily fixed by running the file mongod.exe (C:\Program Files\MongoDB\Server\3.2\bin) then run the file mongo.exe (C:\Program Files\MongoDB\Server\3.2\bin)..Problem fixed

Answer 6

mongod --configsvr --smallfiles --nojournal --dbpath cfg/1 --port 26052 --fork --logpath cfg/3.log >/dev/null

Create a single mongos server on the default port

sleep 2000
mongos --configdb ${HOSTNAME}:26050,${HOSTNAME}:26051,${HOSTNAME}:26052 --fork --logpath mongos.log >/dev/null

Sleep for some time before starting the mongos you will not face the problem