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Plesk is not accessible after switching from MySQL to MariaDB: "Unable to connect to database: No such file or directory /var/lib/mysql/mysql.sock"

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Kuzma Ivanov
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Applicable to:

  • Plesk for Linux
  • Plesk for Windows

Symptoms

  • There was an attempt to switch a database server from MySQL to MariaDB.

  • Plesk is not accessible after this procedure. The following error message is shown in a browser:

    PLESK_INFO: Unable to connect to database: mysql_connect(): No such file or directory /var/lib/mysql/mysql.sock (Error code: 2002). Please check that database server is started and accessible. (Abstract.php:69)

  • MySQL cannot be started:

    # service mysql start
    mysql: unrecognized service

Cause

Switching from MySQL to MariaDB procedure was performed incorrectly.

Resolution

Review the procedure described in the following KB article:

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