weixin_45936094的博客

最近用idea写了一个程序，中间把mysql从5.7升级到了8.0.原来程序正常，升级之后报错！idea程序连接MySQL数据库失败Communications link failure报错The last packet sent successfully to the server was 0 milliseconds ago. The driver has not received any packets from the server.首先检查一下url连接串是不是有错误，我这里之前程序可以

1、报错原因启动SpringCloud项目时报No Feign Client for loadBalancing defined. Did you forget to include spring-cloud-starter-loadbalancer?错误是因为SpringBoot和SpringCloud版本不兼容导致的2、解决方法可以降低SpringBoot和SpringCloud的版本或者加上如下依赖：<!--使用Spring Cloud LoadBalancer 进行...