Can't connect to mySQL

My ERPNext installation has two servers. Bench is installed on the first server and the second has the MariaDB installed.

ERPNext works fine and after a few days of ERPNext running continuously, I start to see that I cannot use ERPNext and see the below error in the error snapshot.

OperationalError(2003, "Can't connect to MySQL s...n '' ([Errno 111] Connection refused)")

I When I see this error, I restart the MariaDB server and everything works fine after that. Any clues to resolve this issue?

Use this command

mysql -u root -p -A


bench --site <your site_name> mariadb
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