Workbench:
MySQL Workbench has encountered a problem
外部组件发生异常。
Navicat:
1251 - Client does not support authentication protocol requested by server; consider upgrading MySQL client
可能出现的原因是：mysql8 之前的版本中加密规则是mysql_native_password,而在mysql8之后,加密规则是caching_sha2_password,
解决问题方法有两种：
方法1.升级navicat驱动；
方法2.把mysql用户登录密码还原成mysql_native_password.
(root@localhost) [(none)]> alter user root@'192.168.56.%' identified with mysql_native_password by '124345678';
Query OK, 0 rows affected (0.01 sec)
