启动正常，但是报错，为什么呢
2018-07-12 09:52:55.150 WARN 6580 --- [gistrationTask1] d.c.b.a.c.r.ApplicationRegistrator : Failed to register application as Application [name=spring-boot-application, managementUrl=http://LAPTOP-1PVH4I73:9999/, healthUrl=http://LAPTOP-1PVH4I73:9999/health/, serviceUrl=http://LAPTOP-1PVH4I73:9999/] at spring-boot-admin ([http://127.0.0.1:8080/api/applications]): I/O error on POST request for "http://127.0.0.1:8080/api/applications": Connection refused: connect; nested exception is java.net.ConnectException: Connection refused: connect. Further attempts are logged on DEBUG level
