MongoDB mongod server fails to start after installation and solution

Created:07 Apr 2022 00:55:48 , in  Host development

Recently I had to install MongoDb on a machine running Debian/GNU Linux 10 Buster. I followed the official installation guide. The database installed without any problem. However when I checked the status of mongod service I noticed it had failed to start.

Here is the status:

mongod.service - MongoDB Database Server
Loaded: loaded (/lib/systemd/system/mongod.service; disabled; vendor preset: enabled)
Active: failed (Result: signal) since Wed 2021-08-18 11:58:29 MSK; 4s ago
Docs: https://docs.mongodb.org/manual
Process: 13899 ExecStart=/usr/bin/mongod --config /etc/mongod.conf (code=killed, signal=ILL)
Main PID: 13899 (code=killed, signal=ILL)

I tried to restart the server, but it would not get up.

Solution

The reason, why mongod server could not start was. MongoDB relies on libmkl-dev and libmkl-avx2 libraries, botch of which Debian distribution does not provide by default. Moreover, they are not even available unless non-free package repository is enabled.

So, in order to install the two libraries, log in as root user (or switch to privileged user with sudo), enable non-free repository in your /etc/apt/sources.list by adding non-free after URLS of official Debian repositories, save and close the file.

Then, remove faulty mongoDB packaged from your machine.

$ apg-get purge mongodb-org 

Finally, install all three required packages, start and enable mongod service:

$ apt-get install libmkl-dev libmkl-avx2 mongodb-org
$ systemctl start mongod
$ systemctl enable mongod

Type the following command to make sure the MongoDB database server is working:

$ systemctl status mongod

If everything went ok, you should get status response which looks like this:

mongod.service - MongoDB Database Server
Loaded: loaded (/lib/systemd/system/mongod.service; enabled; vendor preset: e
Active: active (running) since Tue 2022-04-05 01:42:12 BST; 1 day 22h ago
Docs: https://docs.mongodb.org/manual
Main PID: 749 (mongod)
Memory: 25.5M
CGroup: /system.slice/mongod.service
        └─749 /usr/bin/mongod --config /etc/mongod.conf

Take a closer look at the third line of the status, which tells the mongod service is up and running.

This post was updated on 07 Apr 2022 00:56:49

Tags:  MongoDB