java.lang.IllegalArgumentException: no server available 报错: 没有可用的服务器

报错信息:

java.lang.IllegalArgumentException: no server available
    at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:354) ~[nacos-client-1.0.0.jar:na]
    at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:304) ~[nacos-client-1.0.0.jar:na]
    at com.alibaba.nacos.client.naming.net.NamingProxy.registerService(NamingProxy.java:186) ~[nacos-client-1.0.0.jar:na]
    at com.alibaba.nacos.client.naming.NacosNamingService.registerInstance(NacosNamingService.java:298) ~[nacos-client-1.0.0.jar:na]
    at com.alibaba.nacos.client.naming.NacosNamingService.registerInstance(NacosNamingService.java:279) ~[nacos-client-1.0.0.jar:na]
    at org.springframework.cloud.alibaba.nacos.registry.NacosServiceRegistry.register(NacosServiceRegistry.java:63) ~[spring-cloud-alibaba-nacos-discovery-0.2.2.RELEASE.jar:0.2.2.RELEASE]
    at org.springframework.cloud.client.serviceregistry.AbstractAutoServiceRegistration.register(AbstractAutoServiceRegistration.java:239) [spring-cloud-commons-2.2.0.RELEASE.jar:2.2.0.RELEASE]
    at org.springframework.cloud.alibaba.nacos.registry.NacosAutoServiceRegistration.register(NacosAutoServiceRegistration.java:74) [spring-cloud-alibaba-nacos-discovery-0.2.2.RELEASE.jar:0.2.2.RELEASE]
    at org.springframework.cloud.client.serviceregistry.AbstractAutoServiceRegistration.start(AbstractAutoServiceRegistration.java:138) [spring-cloud-commons-2.2.0.RELEASE.jar:2.2.0.RELEASE]
    at org.springframework.cloud.client.serviceregistry.AbstractAutoServiceRegistration.bind(AbstractAutoServiceRegistration.java:101) [spring-cloud-commons-2.2.0.RELEASE.jar:2.2.0.RELEASE]
    at org.springframework.cloud.client.serviceregistry.AbstractAutoServiceRegistration.onApplicationEvent(AbstractAutoServiceRegistration.java:88) [spring-cloud-commons-2.2.0.RELEASE.jar:2.2.0.RELEASE]
    at org.springframework.cloud.client.serviceregistry.AbstractAutoServiceRegistration.onApplicationEvent(AbstractAutoServiceRegistration.java:47) [spring-cloud-commons-2.2.0.RELEASE.jar:2.2.0.RELEASE]
    at org.springframework.context.event.SimpleApplicationEventMulticaster.doInvokeListener(SimpleApplicationEventMulticaster.java:172) [spring-context-5.2.1.RELEASE.jar:5.2.1.RELEASE]
    at org.springframework.context.event.SimpleApplicationEventMulticaster.invokeListener(SimpleApplicationEventMulticaster.java:165) [spring-context-5.2.1.RELEASE.jar:5.2.1.RELEASE]
    at org.springframework.context.event.SimpleApplicationEventMulticaster.multicastEvent(SimpleApplicationEventMulticaster.java:139) [spring-context-5.2.1.RELEASE.jar:5.2.1.RELEASE]
    at org.springframework.context.support.AbstractApplicationContext.publishEvent(AbstractApplicationContext.java:403) [spring-context-5.2.1.RELEASE.jar:5.2.1.RELEASE]
    at org.springframework.context.support.AbstractApplicationContext.publishEvent(AbstractApplicationContext.java:360) [spring-context-5.2.1.RELEASE.jar:5.2.1.RELEASE]
    at org.springframework.boot.web.servlet.context.ServletWebServerApplicationContext.finishRefresh(ServletWebServerApplicationContext.java:165) [spring-boot-2.2.1.RELEASE.jar:2.2.1.RELEASE]
    at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:553) [spring-context-5.2.1.RELEASE.jar:5.2.1.RELEASE]
    at org.springframework.boot.web.servlet.context.ServletWebServerApplicationContext.refresh(ServletWebServerApplicationContext.java:141) [spring-boot-2.2.1.RELEASE.jar:2.2.1.RELEASE]
    at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:747) [spring-boot-2.2.1.RELEASE.jar:2.2.1.RELEASE]
    at org.springframework.boot.SpringApplication.refreshContext(SpringApplication.java:397) [spring-boot-2.2.1.RELEASE.jar:2.2.1.RELEASE]
    at org.springframework.boot.SpringApplication.run(SpringApplication.java:315) [spring-boot-2.2.1.RELEASE.jar:2.2.1.RELEASE]
    at org.springframework.boot.SpringApplication.run(SpringApplication.java:1226) [spring-boot-2.2.1.RELEASE.jar:2.2.1.RELEASE]
    at org.springframework.boot.SpringApplication.run(SpringApplication.java:1215) [spring-boot-2.2.1.RELEASE.jar:2.2.1.RELEASE]
    at com.atguigu.oss.OssApplication.main(OssApplication.java:13) [classes/:na]