Explore information related to mongodb errors


MongoDB service is not starting up - Fix it now


This article covers how to resolve the the problem of starting MongoDB server when running the command mongod which may arise due to file permission or ownership issues.


The reason was the dbpath variable in /etc/mongodb.conf. 

To fix, you only had to change the owner of the /data/db directory recursively.

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

$sudo apt-get install  mongodb


Also, You can use the below-mentioned command for mongodb service is not starting up:-

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

$mongod --repair 

$sudo service mongodb start


Mongodb service is not starting up:

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

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Monitor MongoDB Performance


This article will guide you on some useful monitoring utilities and #database commands for #reporting #statistics about the state of a running #MongoDB instance.

The motivation of the MongoDB language is to implement a data store that provides high performance, high availability, and automatic #scaling. MongoDB is extremely simple to install and implement. MongoDB uses JSON or BSON documents to #store #data.

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Solve Mongodb Socket error address already in use


Best Method to get rid of Mongodb Socket  error address already in use in Linux.

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