Let us examine the error Plesk failed to start mariadb. At Bobcares our Server management support services will give you a complete guide on resolving the error.

Symptoms for the Plesk failed to start MariaDB error

MySQL/MariaDB fails to start owing to missing or corrupt tables in the ‘mysql’ records. The following error messages occur in:

/var/log/mysqld.log or /var/log/mariadb/mariadb.log: [ERROR] Cannot open .Or it may occur in the lock privilege tables:

fatal error Incorrect file format 'table name' [ERROR] Cannot open or lock privilege tables: fatal error 'table name' does not exist../usr/sbin/mysqld: The table 'table name' does not exist.

Cause for Plesk failed to start mariadb

Tables in the mysql database are either missing or damaged.

Error Solution

1: Firstly, Use SSH to connect to the Plesk server.

2: After that, we can choose to stop the MariaDB/MySQL service by typing  in the following command line:

service mariadb stop
service mysql stop

3:Add the following to the my.cnf file:

myskip-grant-tables

• In a text editor, open the my.cnf file. In this case, we’ll use the vi editor:
• on CentOS/RHEL-based systems

  vi /etc/my.cnf
• Distributions based on Debian/Ubuntu

  vi /etc/mysql/my.cnf
• In the [mysqld] section, add the skip-grant-tables directive. To do this type in the following command line:

  [mysqld]
skip-grant-tables
• Save the changes and exit the program.

4. Start the MariaDB/MySQL service by typing in the following command line. This is the next step to clear the Plesk failed to start error:

service mariadb start
service mysql start

5. Make a backup of the mysql database:

MYSQL_PWD=`cat /etc/psa/.psa.shadow` mysqldump -uadmin --skip-extended-insert mysql > /root/mysql_dump.`date +%F.%s`.sql

6: Copy the mysql directory to the /root directory:

mv /var/lib/mysql/mysql/ /root

7: List all Plesk daily dumps that are accessible (the default dumps folder is /var/lib/psa/dumps):

ls -lat `cat /etc/psa/psa.conf | grep DUMP_D | grep -v "#" | awk '{print $2}'`/mysql.daily.dump*

-rw------- 1 root root 236253 Dec 3 01:51 /var/lib/psa/dumps/mysql.daily.dump.0.gz
-rw------- 1 root root 229653 Jul 2 01:48 /var/lib/psa/dumps/mysql.daily.dump.1.gz
-rw------- 1 root root 222485 Apr 1 01:56 /var/lib/psa/dumps/mysql.daily.dump.2.gz

8: Restore MySQL from the most recent Plesk daily dump:

zcat /var/lib/psa/dumps/mysql.daily.dump.0.gz | sed -n '/-- Current Database: `mysql`/,/-- Current Database:*/p' | plesk db

9: Remove the already-included skip-grant-tables directive.

10: Finally, start the MariaDB/MySQL service this clears the falling start mariadb error:

service mariadb restart
service mysql restart

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Conclusion

To sum up we have now learned how to resolve the Plesk failed to start mariadb error. We have learned to solve the error by the steps put forth by our server management support services.