Issue MariaDB not starting

[xdelios]

Hello,

I have a small problem.

I am using latest Plesk version on Centos 7 with Cloudlinux installed.
I made an update from the Updates and Upgrades setting in Tools from admin panel and after that I cannot start Mariadb

This is what I get from the console.

● mariadb.service - MariaDB database server
   Loaded: loaded (/usr/lib/systemd/system/mariadb.service; enabled; vendor preset: disabled)
  Drop-In: /etc/systemd/system/mariadb.service.d
           └─migrated-from-my.cnf-settings.conf
   Active: failed (Result: exit-code) since Sat 2017-05-06 12:47:50 EEST; 6s ago
  Process: 515754 ExecStartPre=/usr/libexec/mariadb-prepare-db-dir %n (code=exited, status=1/FAILURE)
 Main PID: 584855 (code=exited, status=0/SUCCESS)
   CGroup: /system.slice/mariadb.service

May 06 12:47:50 shared01.towerhost.gr systemd[1]: Starting MariaDB database server...
May 06 12:47:50 shared01.towerhost.gr systemd[1]: mariadb.service: control process exited, code=exite         d status=1
May 06 12:47:50 shared01.towerhost.gr systemd[1]: Failed to start MariaDB database server.
May 06 12:47:50 shared01.towerhost.gr systemd[1]: Unit mariadb.service entered failed state.
May 06 12:47:50 shared01.towerhost.gr systemd[1]: mariadb.service failed.

Any ideas?

 

[Bitpalast]

Does any of these give additional information on the reason why it does not start?
# journalctl -xe
# less /var/log/mariadb/mariadb.log