MySql Host is blocked because of many connection errors; unblock with 'mysqladmin flush-hosts' 原因:同一个ip在短时间内产生太多(超过mysql数据库max_connection_errors)中断的数据库连接而导致的阻塞; 解决: 进入主机数据库执行:flush hosts 进入从机数据库执行:flush hosts