- Plesk for Linux
E-Mails are stuck in the queue with below messages in
amavis: (26892-01) (!)connect_to_sql: unable to connect to DSN 'DBI:mysql:database=emailsecurity;host=localhost;port=3306': Can't connect to local MySQL server through socket '/var/lib/mysql/mysql.sock' (13)
amavis: (26892-01) (!!)TROUBLE in process_request: connect_to_sql: unable to connect to any dataset at (eval 132) line 253.
amavis: (26892-01) (!)Requesting process rundown after fatal error
MariaDB upgrade has been performed recently on the server with SELinux enabled
MariaDB bug #MDEV-24941: SElinux incorrect label for server socket.
The SELinux context for the MariaDB socket file
/var/lib/mysql/mysql.sock has been lost because of an upgrade to MariaDB version affected by the bug.
To workaround the problem until the bug is resolved apply the following steps:
- Connect to the server via SSH
Warning: On applying the following step the database server MariaDB will be restarted, which leads to a short inaccessibility of other Plesk related services and websites accessing the database
Run the following command:
# printf '%s\n' '[Service]' 'ExecStartPost=/sbin/restorecon /var/lib/mysql/mysql.sock' > /etc/systemd/system/mariadb.service.d/restorecon_socket.conf && systemctl daemon-reload && systemctl restart mariadb
The following alternative workarounds are also available:
Downgrade MariaDB server to version not affected by bug #MDEV-24941
Disable Amavis by disabling Plesk Email Security extension
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