代码404:找不到服务：DEFAULT_GROUP@@localhost

当我们使用“SentinelRestTemplate”和“LoadBalanced”时，我收到错误消息：“代码404:找不到服务：DEFAULT_GROUP@@localhost”，我该如何解决？

组成部分： spring-cloud-dependencies:Greenwich.SR2 , spring-cloud-alibaba-dependencies:2.1.0.RELEASE

POM依赖性： org.springframework.boot spring-boot-starter-web

        <exclusion>
            <artifactId>spring-boot-starter-tomcat</artifactId>
            <groupId>org.springframework.boot</groupId>
        </exclusion>
    </exclusions>
</dependency>

<dependency>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-undertow</artifactId>
</dependency>
<dependency>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-actuator</artifactId>
</dependency>
<dependency>
    <groupId>com.alibaba.cloud</groupId>
    <artifactId>spring-cloud-starter-alibaba-sentinel</artifactId>
</dependency>

<dependency>
    <groupId>de.codecentric</groupId>
    <artifactId>spring-boot-admin-starter-client</artifactId>
    <version>${spring-boot-admin.version}</version>
</dependency>


<dependency>
    <groupId>com.alibaba.cloud</groupId>
    <artifactId>spring-cloud-alibaba-nacos-config</artifactId>
</dependency>
<dependency>
    <groupId>com.alibaba.cloud</groupId>
    <artifactId>spring-cloud-starter-alibaba-nacos-discovery</artifactId>
</dependency>

详细错误消息：

com.alibaba.nacos.api.exception.NacosException: failed to req API:192.168.15.125:8848/nacos/v1/ns/instance/list. code:404 msg: service not found: DEFAULT_GROUP@@localhost at com.alibaba.nacos.client.naming.net.NamingProxy.callServer(NamingProxy.java:424) [nacos-client-1.1.1.jar:na] at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:451) [nacos-client-1.1.1.jar:na] at com.alibaba.nacos.client.naming.net.NamingProxy.reqAPI(NamingProxy.java:386) [nacos-client-1.1.1.jar:na] at com.alibaba.nacos.client.naming.net.NamingProxy.queryList(NamingProxy.java:297) [nacos-client-1.1.1.jar:na] at com.alibaba.nacos.client.naming.core.HostReactor.updateServiceNow(HostReactor.java:270) [nacos-client-1.1.1.jar:na] at com.alibaba.nacos.client.naming.core.HostReactor.getServiceInfo(HostReactor.java:229) [nacos-client-1.1.1.jar:na] at com.alibaba.nacos.client.naming.NacosNamingService.selectInstances(NacosNamingService.java:342) [nacos-client-1.1.1.jar:na] at com.alibaba.nacos.client.naming.NacosNamingService.selectInstances(NacosNamingService.java:334) [nacos-client-1.1.1.jar:na] at com.alibaba.nacos.client.naming.NacosNamingService.selectInstances(NacosNamingService.java:323) [nacos-client-1.1.1.jar:na] at com.alibaba.nacos.client.naming.NacosNamingService.selectInstances(NacosNamingService.java:301) [nacos-client-1.1.1.jar:na] at com.alibaba.cloud.nacos.ribbon.NacosServerList.getServers(NacosServerList.java:55) [spring-cloud-alibaba-nacos-discovery-2.1.0.RELEASE.jar:2.1.0.RELEASE] at com.alibaba.cloud.nacos.ribbon.NacosServerList.getUpdatedListOfServers(NacosServerList.java:49) [spring-cloud-alibaba-nacos-discovery-2.1.0.RELEASE.jar:2.1.0.RELEASE] at com.netflix.loadbalancer.DynamicServerListLoadBalancer.updateListOfServers(DynamicServerListLoadBalancer.java:240) [ribbon-loadbalancer-2.3.0.jar:2.3.0] at com.netflix.loadbalancer.DynamicServerListLoadBalancer.restOfInit(DynamicServerListLoadBalancer.java:144) [ribbon-loadbalancer-2.3.0.jar:2.3.0] at com.netflix.loadbalancer.DynamicServerListLoadBalancer.(DynamicServerListLoadBalancer.java:95) [ribbon-loadbalancer-2.3.0.jar:2.3.0] at com.netflix.loadbalancer.ZoneAwareLoadBalancer.(ZoneAwareLoadBalancer.java:82) [ribbon-loadbalancer-2.3.0.jar:2.3.0] at org.springframework.cloud.netflix.ribbon.RibbonClientConfiguration.ribbonLoadBalancer(RibbonClientConfiguration.java:155) [spring-cloud-netflix-ribbon-2.1.2.RELEASE.jar:2.1.2.RELEASE] at org.springframework.cloud.netflix.ribbon.RibbonClientConfiguration$$EnhancerBySpringCGLIB$$74c85e72.CGLIB$ribbonLoadBalancer$10() [spring-cloud-netflix-ribbon-2.1.2.RELEASE.jar:2.1.2.RELEASE] at org.springframework.cloud.netflix.ribbon.RibbonClientConfiguration$$EnhancerBySpringCGLIB$$74c85e72$$FastClassBySpringCGLIB$$c7f5c91d.invoke() [spring-cloud-netflix-ribbon-2.1.2.RELEASE.jar:2.1.2.RELEASE] at org.springframework.cglib.proxy.MethodProxy.invokeSuper(MethodProxy.java:244) [spring-core-5.1.9.RELEASE.jar:5.1.9.RELEASE] at org.springframework.context.annotation.ConfigurationClassEnhancer$BeanMethodInterceptor.intercept(ConfigurationClassEnhancer.java:363) [spring-context-5.1.9.RELEASE.jar:5.1.9.RELEASE] at org.springframework.cloud.netflix.ribbon.RibbonClientConfiguration$$EnhancerBySpringCGLIB$$74c85e72.ribbonLoadBalancer() [spring-cloud-netflix-ribbon-2.1.2.RELEASE.jar:2.1.2.RELEASE] at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[na:1.8.0_05] at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) ~[na:1.8.0_05] at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[na:1.8.0_05] at java.lang.reflect.Method.invoke(Method.java:483) ~[na:1.8.0_05] at org.springframework.beans.factory.support.SimpleInstantiationStrategy.instantiate(SimpleInstantiationStrategy.java:154) [spring-beans-5.1.9.RELEASE.jar:5.1.9.RELEASE] at org.springframework.beans.factory.support.ConstructorResolver.instantiate(ConstructorResolver.java:622) [spring-beans-5.1.9.RELEASE.jar:5.1.9.RELEASE] at org.springframework.beans.factory.support.ConstructorResolver.instantiateUsingFactoryMethod(ConstructorResolver.java:607) [spring-beans-5.1.9.RELEASE.jar:5.1.9.RELEASE] at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.instantiateUsingFactoryMethod(AbstractAutowireCapableBeanFactory.java:1321) [spring-beans-5.1.9.RELEASE.jar:5.1.9.RELEASE] at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBeanInstance(AbstractAutowireCapableBeanFactory.java:1160) [spring-beans-5.1.9.RELEASE.jar:5.1.9.RELEASE] at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:555) [spring-beans-5.1.9.RELEASE.jar:5.1.9.RELEASE] at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:515) [spring-beans-5.1.9.RELEASE.jar:5.1.9.RELEASE] at org.springframework.beans.factory.support.AbstractBeanFactory.lambda$doGetBean$0(AbstractBeanFactory.java:320) [spring-beans-5.1.9.RELEASE.jar:5.1.9.RELEASE] at org.springframework.beans.factory.support.AbstractBeanFactory$$Lambda$154/88646218.getObject(Unknown Source) [spring-beans-5.1.9.RELEASE.jar:5.1.9.RELEASE] at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:222) [spring-beans-5.1.9.RELEASE.jar:5.1.9.RELEASE] at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:318) [spring-beans-5.1.9.RELEASE.jar:5.1.9.RELEASE] at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:199) [spring-beans-5.1.9.RELEASE.jar:5.1.9.RELEASE] at org.springframework.beans.factory.config.DependencyDescriptor.resolveCandidate(DependencyDescriptor.java:277) [spring-beans-5.1.9.RELEASE.jar:5.1.9.RELEASE] at org.springframework.beans.factory.support.DefaultListableBeanFactory.doResolveDependency(DefaultListableBeanFactory.java:1251) [spring-beans-5.1.9.RELEASE.jar:5.1.9.RELEASE] at org.springframework.beans.factory.support.DefaultListableBeanFactory.resolveDependency(DefaultListableBeanFactory.java:1171) [spring-beans-5.1.9.RELEASE.jar:5.1.9.RELEASE] at org.springframework.beans.factory.support.ConstructorResolver.resolveAutowiredArgument(ConstructorResolver.java:857) [spring-beans-5.1.9.RELEASE.jar:5.1.9.RELEASE] at org.springframework.beans.factory.support.ConstructorResolver.createArgumentArray(ConstructorResolver.java:760) [spring-beans-5.1.9.RELEASE.jar:5.1.9.RELEASE] at org.springframework.beans.factory.support.ConstructorResolver.instantiateUsingFactoryMethod(ConstructorResolver.java:509) [spring-beans-5.1.9.RELEASE.jar:5.1.9.RELEASE] at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.instantiateUsingFactoryMethod(AbstractAutowireCapableBeanFactory.java:1321) [spring-beans-5.1.9.RELEASE.jar:5.1.9.RELEASE] at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBeanInstance(AbstractAutowireCapableBeanFactory.java:1160) [spring-beans-5.1.9.RELEASE.jar:5.1.9.RELEASE] at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:555) [spring-beans-5.1.9.RELEASE.jar:5.1.9.RELEASE] at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:515) [spring-beans-5.1.9.RELEASE.jar:5.1.9.RELEASE] at org.springframework.beans.factory.support.AbstractBeanFactory.lambda$doGetBean$0(AbstractBeanFactory.java:320) [spring-beans-5.1.9.RELEASE.jar:5.1.9.RELEASE] at org.springframework.beans.factory.support.AbstractBeanFactory$$Lambda$154/88646218.getObject(Unknown Source) [spring-beans-5.1.9.RELEASE.jar:5.1.9.RELEASE] at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:222) [spring-beans-5.1.9.RELEASE.jar:5.1.9.RELEASE] at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:318) [spring-beans-5.1.9.RELEASE.jar:5.1.9.RELEASE] at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:199) [spring-beans-5.1.9.RELEASE.jar:5.1.9.RELEASE] at org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:845) [spring-beans-5.1.9.RELEASE.jar:5.1.9.RELEASE] at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:877) [spring-context-5.1.9.RELEASE.jar:5.1.9.RELEASE] at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:549) [spring-context-5.1.9.RELEASE.jar:5.1.9.RELEASE] at org.springframework.cloud.context.named.NamedContextFactory.createContext(NamedContextFactory.java:136) [spring-cloud-context-2.1.2.RELEASE.jar:2.1.2.RELEASE] at org.springframework.cloud.context.named.NamedContextFactory.getContext(NamedContextFactory.java:101) [spring-cloud-context-2.1.2.RELEASE.jar:2.1.2.RELEASE] at org.springframework.cloud.netflix.ribbon.SpringClientFactory.getContext(SpringClientFactory.java:131) [spring-cloud-netflix-ribbon-2.1.2.RELEASE.jar:2.1.2.RELEASE] at org.springframework.cloud.context.named.NamedContextFactory.getInstance(NamedContextFactory.java:145) [spring-cloud-context-2.1.2.RELEASE.jar:2.1.2.RELEASE] at org.springframework.cloud.netflix.ribbon.SpringClientFactory.getInstance(SpringClientFactory.java:121) [spring-cloud-netflix-ribbon-2.1.2.RELEASE.jar:2.1.2.RELEASE] at org.springframework.cloud.netflix.ribbon.SpringClientFactory.getLoadBalancer(SpringClientFactory.java:65) [spring-cloud-netflix-ribbon-2.1.2.RELEASE.jar:2.1.2.RELEASE] at org.springframework.cloud.netflix.ribbon.RibbonLoadBalancerClient.getLoadBalancer(RibbonLoadBalancerClient.java:193) [spring-cloud-netflix-ribbon-2.1.2.RELEASE.jar:2.1.2.RELEASE] at org.springframework.cloud.netflix.ribbon.RibbonLoadBalancerClient.choose(RibbonLoadBalancerClient.java:88) [spring-cloud-netflix-ribbon-2.1.2.RELEASE.jar:2.1.2.RELEASE] at org.springframework.cloud.netflix.ribbon.RibbonLoadBalancerClient.choose(RibbonLoadBalancerClient.java:78) [spring-cloud-netflix-ribbon-2.1.2.RELEASE.jar:2.1.2.RELEASE] at org.springframework.cloud.sleuth.zipkin2.sender.LoadBalancerClientZipkinLoadBalancer.instance(LoadBalancerClientZipkinLoadBalancer.java:43) [spring-cloud-sleuth-zipkin-2.1.2.RELEASE.jar:2.1.2.RELEASE] at org.springframework.cloud.sleuth.zipkin2.sender.ZipkinRestTemplateSenderConfiguration$1.zipkinUrl(ZipkinRestTemplateSenderConfiguration.java:69) [spring-cloud-sleuth-zipkin-2.1.2.RELEASE.jar:2.1.2.RELEASE] at org.springframework.cloud.sleuth.zipkin2.sender.ZipkinRestTemplateWrapper.doExecute(ZipkinRestTemplateSenderConfiguration.java:160) [spring-cloud-sleuth-zipkin-2.1.2.RELEASE.jar:2.1.2.RELEASE] at org.springframework.web.client.RestTemplate.exchange(RestTemplate.java:637) [spring-web-5.1.9.RELEASE.jar:5.1.9.RELEASE] at org.springframework.cloud.sleuth.zipkin2.sender.RestTemplateSender.post(RestTemplateSender.java:129) [spring-cloud-sleuth-zipkin-2.1.2.RELEASE.jar:2.1.2.RELEASE] at org.springframework.cloud.sleuth.zipkin2.sender.RestTemplateSender$HttpPostCall.doExecute(RestTemplateSender.java:142) [spring-cloud-sleuth-zipkin-2.1.2.RELEASE.jar:2.1.2.RELEASE] at org.springframework.cloud.sleuth.zipkin2.sender.RestTemplateSender$HttpPostCall.doExecute(RestTemplateSender.java:132) [spring-cloud-sleuth-zipkin-2.1.2.RELEASE.jar:2.1.2.RELEASE] at zipkin2.Call$Base.execute(Call.java:379) [zipkin-2.14.2.jar:na] at zipkin2.reporter.AsyncReporter$BoundedAsyncReporter.flush(AsyncReporter.java:286) [zipkin-reporter-2.8.4.jar:na] at zipkin2.reporter.AsyncReporter$Builder$1.run(AsyncReporter.java:190) [zipkin-reporter-2.8.4.jar:na]

原提问者GitHub用户magicsgxie