主要报错信息如下：
学习springcloud时，学习到openfeign的时候启动feign-order80时报错：Request execution error. endpoint=DefaultEndpoint{ serviceUrl='http://localhost:8761/eureka/}
具体报错信息如下：
E:\smallTools\jdk\java-se-8u41-ri\bin\java.exe -XX:TieredStopAtLevel=1
2022-03-02 20:44:21.954 INFO 3152 --- [ restartedMain] .e.DevToolsPropertyDefaultsPostProcessor : Devtools property defaults active! Set 'spring.devtools.add-properties' to 'false' to disable
. ____ _ __ _ _
/\\ / ___'_ __ _ _(_)_ __ __ _ \ \ \ \
( ( )\___ | '_ | '_| | '_ \/ _` | \ \ \ \
\\/ ___)| |_)| | | | | || (_| | ) ) ) )
' |____| .__|_| |_|_| |_\__, | / / / /
=========|_|==============|___/=/_/_/_/
:: Spring Boot :: (v2.2.5.RELEASE)
2022-03-02 20:44:23.316 INFO 3152 --- [ restartedMain] com.feng.springcloud.OrderFeignMain80 : No active profile set, falling back to default profiles: default
2022-03-02 20:44:26.114 WARN 3152 --- [ restartedMain] c.n.c.sources.URLConfigurationSource : No URLs will be polled as dynamic configuration sources.
2022-03-02 20:44:26.114 INFO 3152 --- [ restartedMain] c.n.c.sources.URLConfigurationSource : To enable URLs as dynamic configuration sources, define System property archaius.configurationSource.additionalUrls or make config.properties available on classpath.
2022-03-02 20:44:26.198 INFO 3152 --- [ restartedMain] o.s.s.concurrent.ThreadPoolTaskExecutor : Initializing ExecutorService 'applicationTaskExecutor'
2022-03-02 20:44:27.535 INFO 3152 --- [ restartedMain] o.s.cloud.commons.util.InetUtils : Cannot determine local hostname
2022-03-02 20:44:27.557 WARN 3152 --- [ restartedMain] ockingLoadBalancerClientRibbonWarnLogger : You already have RibbonLoadBalancerClient on your classpath. It will be used by default. As Spring Cloud Ribbon is in maintenance mode. We recommend switching to BlockingLoadBalancerClient instead. In order to use it, set the value of `spring.cloud.loadbalancer.ribbon.enabled` to `false` or remove spring-cloud-starter-netflix-ribbon from your project.
2022-03-02 20:44:27.579 INFO 3152 --- [ restartedMain] o.s.b.a.e.web.EndpointLinksResolver : Exposing 2 endpoint(s) beneath base path '/actuator'
2022-03-02 20:44:27.637 INFO 3152 --- [ restartedMain] o.s.c.n.eureka.InstanceInfoFactory : Setting initial instance status as: STARTING
2022-03-02 20:44:27.661 INFO 3152 --- [ restartedMain] com.netflix.discovery.DiscoveryClient : Initializing Eureka in region us-east-1
2022-03-02 20:44:27.720 INFO 3152 --- [ restartedMain] c.n.d.provider.DiscoveryJerseyProvider : Using JSON encoding codec LegacyJacksonJson
2022-03-02 20:44:27.720 INFO 3152 --- [ restartedMain] c.n.d.provider.DiscoveryJerseyProvider : Using JSON decoding codec LegacyJacksonJson
2022-03-02 20:44:27.813 INFO 3152 --- [ restartedMain] c.n.d.provider.DiscoveryJerseyProvider : Using XML encoding codec XStreamXml
2022-03-02 20:44:27.813 INFO 3152 --- [ restartedMain] c.n.d.provider.DiscoveryJerseyProvider : Using XML decoding codec XStreamXml
2022-03-02 20:44:27.926 INFO 3152 --- [ restartedMain] c.n.d.s.r.aws.ConfigClusterResolver : Resolving eureka endpoints via configuration
2022-03-02 20:44:28.029 INFO 3152 --- [ restartedMain] com.netflix.discovery.DiscoveryClient : Disable delta property : false
2022-03-02 20:44:28.029 INFO 3152 --- [ restartedMain] com.netflix.discovery.DiscoveryClient : Single vip registry refresh property : null
2022-03-02 20:44:28.029 INFO 3152 --- [ restartedMain] com.netflix.discovery.DiscoveryClient : Force full registry fetch : false
2022-03-02 20:44:28.029 INFO 3152 --- [ restartedMain] com.netflix.discovery.DiscoveryClient : Application is null : false
2022-03-02 20:44:28.029 INFO 3152 --- [ restartedMain] com.netflix.discovery.DiscoveryClient : Registered Applications size is zero : true
2022-03-02 20:44:28.029 INFO 3152 --- [ restartedMain] com.netflix.discovery.DiscoveryClient : Application version is -1: true
2022-03-02 20:44:28.029 INFO 3152 --- [ restartedMain] com.netflix.discovery.DiscoveryClient : Getting all instance registry info from the eureka server
2022-03-02 20:44:32.157 ERROR 3152 --- [ restartedMain] c.n.d.s.t.d.RedirectingEurekaHttpClient : Request execution error. endpoint=DefaultEndpoint{ serviceUrl='http://localhost:8761/eureka/}
com.sun.jersey.api.client.ClientHandlerException: java.net.ConnectException: Connection refused: connect
at com.sun.jersey.client.apache4.ApacheHttpClient4Handler.handle(ApacheHttpClient4Handler.java:187) ~[jersey-apache-client4-1.19.1.jar:1.19.1]
at com.sun.jersey.api.client.filter.GZIPContentEncodingFilter.handle(GZIPContentEncodingFilter.java:123) ~[jersey-client-1.19.1.jar:1.19.1]
at com.netflix.discovery.EurekaIdentityHeaderFilter.handle(EurekaIdentityHeaderFilter.java:27) ~[eureka-client-1.9.17.jar:1.9.17]
at com.sun.jersey.api.client.Client.handle(Client.java:652) ~[jersey-client-1.19.1.jar:1.19.1]
at com.sun.jersey.api.client.WebResource.handle(WebResource.java:682) ~[jersey-client-1.19.1.jar:1.19.1]
at com.sun.jersey.api.client.WebResource.access$200(WebResource.java:74) ~[jersey-client-1.19.1.jar:1.19.1]
at com.sun.jersey.api.client.WebResource$Builder.get(WebResource.java:509) ~[jersey-client-1.19.1.jar:1.19.1]
at com.netflix.discovery.shared.transport.jersey.AbstractJerseyEurekaHttpClient.getApplicationsInternal(AbstractJerseyEurekaHttpClient.java:196) ~[eureka-client-1.9.17.jar:1.9.17]
