mongodb service is not starting up

Question

I\'ve installed the mongodb 2.0.3, using the mongodb-10gen debian package. Everything went well, except the service which is installed by default is not starting up when com

Answer 1

I had struggled with the similar issue and sharing the solution accordingly. We use a mongo replica set and mongo service on my secondary server was taking too long to start. (approx 10-15 minutes)

Couldn't find anything until attempted to configure the mongo with some different folder in --dbpath And that worked fine, so we got to know that the earlier path, which was a mount directory had some issues. So followed with nss team to get the network mount issue solved.

Hope this helps someone

Answer 2

Nianliang's solution turned out so useful from my Vagrant ubunuto, thart I ended up adding these 2 commands to my /etc/init.d/mongodb file:

.
.
.    
start|stop|restart)
        rm /var/lib/mongodb/mongod.lock
        mongod --repair
.
.
.

Answer 3

For ubunto , what made it happen and was real simple is to install mongodb package:

sudo apt-get install  mongodb

Answer 4

This can also happen if your file permissions get changed somehow. Removing the lock file didn't help, and we were getting errors in the log file like:

2016-01-20T09:14:58.210-0800 [initandlisten] warning couldn't write to / rename file /var/lib/mongodb/journal/prealloc.0: couldn't open file    /var/lib/mongodb/journal/prealloc.0 for writing errno:13 Permission denied
2016-01-20T09:14:58.288-0800 [initandlisten] couldn't open /var/lib/mongodb/local.ns errno:13 Permission denied
2016-01-20T09:14:58.288-0800 [initandlisten] error couldn't open file /var/lib/mongodb/local.ns terminating

So, went to check permissions:

ls -l /var/lib/mongodb

total 245780
drwxr-xr-x 2 mongodb mongodb     4096 Jan 20 09:14 journal
drwxr-xr-x 2 root    root        4096 Jan 20 09:11 local
-rw------- 1 root    root    67108864 Jan 20 09:11 local.0
-rw------- 1 root    root    16777216 Jan 20 09:11 local.ns
-rwxr-xr-x 1 mongodb nogroup        0 Jan 20 09:14 mongod.lock

To fix:

# chown -R mongodb:mongodb /var/lib/mongodb

Remove the lock file if it's still there:

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

Start mongodb

# service mongodb start

Tail the log and you should see at the end of it:

tail -f /var/log/mongodb/mongodb.log
2016-01-20T09:16:02.025-0800 [initandlisten] waiting for connections on port 27017

Answer 5

Sometimes you need to remove the .lock file to get the service to run

Answer 6

Removing the .lock file and reinstalling did not solve the issue on my machine (Ubuntu 19.10). The problem was that after unexpected shutdown, the MongoDB sock does not belong to the MongoDB group and user anymore.

So, I follow the steps below:

1. cd /tmp
2. ls *.sock

3. Change the user:group permission:

   chown mongodb:mongodb <YOUR_SOCK>
   

4. sudo systemctl start mongod

5. sudo systemctl status mongod