Communications link failure The last packet sent successfully to the server was 0 milliseconds ago.

Mac在运行mybatis-generator插件时遇到错误

Failed to execute goal org.mybatis.generator:mybatis-generator-maven-plugin:1.4.0:generate (default-cli) on project springboot: Communications link failure

The last packet sent successfully to the server was 0 milliseconds ago. The driver has not received any packets from the server.

尝试修改MySQL超时时间，使用命令行登录MySQL

mysql -u root -p

进入MySQL后，使用命令查看超时时间配置

show variables like '%timeout%';

我们需要到 my.cnf 配置文件中修改 interactive_timeout和wait_timeout两个参数的值，
在Mac中安装完MySQL后，my.cnf配置文件需要自己手动创建

cd /usr/local/etc
mkdir mysql
cd mysql
touch my.cnf
vim my.cnf

填入内容，保存关闭

[mysqld]
wait_timeout = 38800
interactive_timeout = 38800

进入设置，选用刚才创建的配置文件

停止服务后重新启用即可