Ubuntu18.04 Mysql exception problem solving (two)

MySQL database 1129 error

“Host ‘192.168.25.80’ is blocked because of many connection errors; unblock with ‘mysqladmin flush-hosts’”

Cause
Many interrupted database connections occurred in a short period of time, resulting in blockage;

Solution
Terminal execute command

sudo mysqladmin flush-hosts -h 127.0.0.1 -uroot -p

ps: Modifying the value of max_connection_errors cannot solve the fundamental problem