搭建Springboot监控中心报错A attempt was made to call the method reactor.retry.Retry.retryMax(I)Lreactor/ret)

 服务器还没启动就报错，是因为jar包的版本没对上，看的视频是SpringBoot2.0 ，现在已经是2.1.7了 

将spring-boot-admin-starter-server版本改为最新就ok了