今天IDEA使用druid连接Mysql数据库报错，MySQL版本5.7.34，druid-spring-boot-starter版本1.1.13。更新druid版本到最新1.2.6也没用。“The last packet sent successfully to the server was 0 milliseconds ago. The driver has not received any

今天IDEA使用druid连接Mysql数据库报错，MySQL版本5.7.34，druid-spring-boot-starter版本1.1.13。更新druid版本到最新1.2.6也没用。“The last packet sent successfully to the server was 0 milliseconds ago. The driver has not received any

今天IDEA使用druid连接Mysql数据库报错，MySQL版本5.7.34，druid-spring-boot-starter版本1.1.13。更新druid版本到最新1.2.6也没用。“The last packet sent successfully to the server was 0 milliseconds ago. The driver has not received any

昨天网络都是好好的，今天打开虚拟机和链接克隆的另外2台，都出现网络不见的情况，ping不通，设置里也没有有线网络的设置项，如图：将NetworkManager文件夹重命名，重启后让系统自动生成NetworkManager文件夹后解决：mv /var/lib/NetworkManager /var/lib/NetworkManager.bakreboot感谢链接：centos7右上角网络连接图标消失