控制台一直打印 Failed one update cycle Can not get service instances from nacos, serviceId=null

[Layfolk-zcy]

2.3.12.RELEASE Hoxton.SR12 2.2.9.RELEASE  ` org.springframework.cloud spring-cloud-starter-openfeign com.alibaba.cloud spring-cloud-starter-alibaba-nacos-discovery org.springframework.boot spring-boot-starter-web org.springframework spring-context-support com.github.ben-manes.caffeine caffeine com.netflix.ribbon ribbon-core ` ` java.lang.IllegalStateException: Can not get service instances from nacos, serviceId=null at com.alibaba.cloud.nacos.ribbon.NacosServerList.getServers(NacosServerList.java:60) ~[spring-cloud-starter-alibaba-nacos-discovery-2.2.9.RELEASE.jar:2.2.9.RELEASE] at com.alibaba.cloud.nacos.ribbon.NacosServerList.getUpdatedListOfServers(NacosServerList.java:49) ~[spring-cloud-starter-alibaba-nacos-discovery-2.2.9.RELEASE.jar:2.2.9.RELEASE] at com.netflix.loadbalancer.DynamicServerListLoadBalancer.updateListOfServers(DynamicServerListLoadBalancer.java:240) ~[ribbon-loadbalancer-2.3.0.jar:2.3.0] at com.netflix.loadbalancer.DynamicServerListLoadBalancer$1.doUpdate(DynamicServerListLoadBalancer.java:62) ~[ribbon-loadbalancer-2.3.0.jar:2.3.0] at com.netflix.loadbalancer.PollingServerListUpdater$1.run(PollingServerListUpdater.java:116) ~[ribbon-loadbalancer-2.3.0.jar:2.3.0] at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511) [na:1.8.0_201] at java.util.concurrent.FutureTask.runAndReset$$$capture(FutureTask.java:308) [na:1.8.0_201] at java.util.concurrent.FutureTask.runAndReset(FutureTask.java) [na:1.8.0_201] at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$301(ScheduledThreadPoolExecutor.java:180) [na:1.8.0_201] at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:294) [na:1.8.0_201] at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149) [na:1.8.0_201] at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624) [na:1.8.0_201] at java.lang.Thread.run(Thread.java:748) [na:1.8.0_201] Caused by: java.lang.IllegalArgumentException: Param 'serviceName' is illegal, serviceName is blank at com.alibaba.nacos.api.naming.utils.NamingUtils.getGroupedName(NamingUtils.java:47) ~[nacos-client-2.1.0.jar:na] at com.alibaba.nacos.client.naming.cache.ServiceInfoHolder.getServiceInfo(ServiceInfoHolder.java:123) ~[nacos-client-2.1.0.jar:na] at com.alibaba.nacos.client.naming.NacosNamingService.selectInstances(NacosNamingService.java:288) ~[nacos-client-2.1.0.jar:na] at com.alibaba.nacos.client.naming.NacosNamingService.selectInstances(NacosNamingService.java:260) ~[nacos-client-2.1.0.jar:na] at com.alibaba.nacos.client.naming.NacosNamingService.selectInstances(NacosNamingService.java:248) ~[nacos-client-2.1.0.jar:na] at com.alibaba.cloud.nacos.ribbon.NacosServerList.getServers(NacosServerList.java:56) ~[spring-cloud-starter-alibaba-nacos-discovery-2.2.9.RELEASE.jar:2.2.9.RELEASE] ... 12 common frames omitted `

[KomachiSion]

Caused by: java.lang.IllegalArgumentException: Param 'serviceName' is illegal, serviceName is blank

这个是ribbon的错误， 应该是传入的服务名是空， 所以找不到对应实例，和nacos无关。可以自行排查一下， 或者提issue到SCA社区找一下答案。

[x86isnice]

同样的版本，同样的问题，问下后来怎么解决了来着？