连接mysql报错 errorCode 1129, state HY000, Host ‘xxx‘ is blocked because of many connection errors

springcloud项目启动连接mysql过程中报错.

报错关键信息如下:

java.sql.SQLException: null,  message from server: "Host '192.168.56.1' is blocked because of many connection errors; unblock with 'mysqladmin flush-hosts'"

错误原因:

mysql设定了单个客户端最大连接失败次数,超过后便无法再连接成功.

可命令行查看: 最大失败数为100.

解决方法:

1.进入mysql控制台,修改max_connect_errors:

set global max_connect_errors=99999;

若想永久生效,去my.conf文件手动添加或修改该行命令.

但方法1不推荐,修改该数值越大,被攻击时安全性越低.

2.进入mysql控制台,把缓存计数清除掉,重启项目即可:

flush hosts;