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异常信息如下：
: null
at (:147) ~[spring-core-5.2.:5.2.]
at (:73) ~[spring-cloud-starter-alibaba-nacos-discovery-2.2.:2.2.]
at (:239) ~[spring-cloud-commons-2.2.:2.2.]
at (:76) ~[spring-cloud-starter-alibaba-nacos-discovery-2.2.:2.2.]
at (:138) ~[spring-cloud-commons-2.2.:2.2.]
at (:101) ~[spring-cloud-commons-2.2.:2.2.]
at (:88) ~[spring-cloud-commons-2.2.:2.2.]
at (:47) ~[spring-cloud-commons-2.2.:2.2.]
at (:172) ~[spring-context-5.2.:5.2.]
at (:165) ~[spring-context-5.2.:5.2.]
at (:139) ~[spring-context-5.2.:5.2.]
at (:404) ~[spring-context-5.2.:5.2.]
at (:361) ~[spring-context-5.2.:5.2.]
at (:165) ~[spring-boot-2.2.:2.2.]
at (:554) ~[spring-context-5.2.:5.2.]
at (:141) ~[spring-boot-2.2.:2.2.]
at (:747) [spring-boot-2.2.:2.2.]
at (:405) [spring-boot-2.2.:2.2.]
at (:315) [spring-boot-2.2.:2.2.]
at (:1226) [spring-boot-2.2.:2.2.]
at (:1215) [spring-boot-2.2.:2.2.]
at (:15) [classes/:na]
Caused by: : failed to req API:/api//nacos/v1/ns/instance after all servers([192.168.22.71:8848]) tried: server is DOWN now, please try again later!
at (:496) ~[nacos-client-1.2.:na]
at (:401) ~[nacos-client-1.2.:na]
at (:397) ~[nacos-client-1.2.:na]
at (:212) ~[nacos-client-1.2.:na]
at (:207) ~[nacos-client-1.2.:na]
at (:64) ~[spring-cloud-starter-alibaba-nacos-discovery-2.2.:2.2.]
... 20 common frames omitted
解决方案
- 最快捷的办法，请直接重新下载一个nacos文件，再次启动就可解决
出现问题的场景
从不同系统复制nacos，然后启动导致报错