Bigdata-172.18.2.46:18080/MSS/#无法登陆，nohup.out报错，"Host '172.18.2.46' is blocked because of many connection errors; unblock with 'mysqladmin flush-hosts'"

1、报错现象：

Caused by: java.sql.SQLException: null, message from server: "Host '172.18.2.46' is blocked because of many connection errors; unblock with 'mysqladmin flush-hosts'"
at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:964)
at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:897)

2、分析

通过上述报错，是2.46连接到数据库报错。和数据库mysql有关。

3、解决方案：

（1）登录mysql控制台：mysql -uroot -p

（2）flush hosts

（3）重新查看nohup.out主机，已经没有再报错。可以正常登陆。