springCloud远程调用Feign接口启动服务时报java.lang.IllegalStateException: Service id not legal hostname

异常信息

java.lang.IllegalStateException: Service id not legal hostname 
	at org.springframework.util.Assert.state(Assert.java:73) ~[spring-core-5.0.11.RELEASE.jar:5.0.11.RELEASE]
	at org.springframework.cloud.openfeign.FeignClientsRegistrar.getName(FeignClientsRegistrar.java:248) ~[spring-cloud-openfeign-core-2.0.2.RELEASE.jar:2.0.2.RELEASE]
	at org.springframework.cloud.openfeign.FeignClientsRegistrar.getName(FeignClientsRegistrar.java:227) ~[spring-cloud-openfeign-core-2.0.2.RELEASE.jar:2.0.2.RELEASE]
	at org.springframework.cloud.openfeign.FeignClientsRegistrar.registerFeignClient(FeignClientsRegistrar.java:172) ~[spring-cloud-openfeign-core-2.0.2.RELEASE.jar:2.0.2.RELEASE]
	at org.springframework.cloud.openfeign.FeignClientsRegistrar.registerFeignClients(FeignClientsRegistrar.java:158) ~[spring-cloud-openfeign-core-2.0.2.RELEASE.jar:2.0.2.RELEASE]
	at org.springframework.cloud.openfeign.FeignClientsRegistrar.registerBeanDefinitions(FeignClientsRegistrar.java:83) ~[spring-cloud-openfeign-core-2.0.2.RELEASE.jar:2.0.2.RELEASE]
	at org.springframework.context.annotation.ConfigurationClassBeanDefinitionReader.lambda$loadBeanDefinitionsFromRegistrars$1(ConfigurationClassBeanDefinitionReader.java:358) ~[spring-context-5.0.11.RELEASE.jar:5.0.11.RELEASE]
	at java.util.LinkedHashMap.forEach(LinkedHashMap.java:684) ~[na:1.8.0_231]
	at org.springframework.context.annotation.ConfigurationClassBeanDefinitionReader.loadBeanDefinitionsFromRegistrars(ConfigurationClassBeanDefinitionReader.java:357) ~[spring-context-5.0.11.RELEASE.jar:5.0.11.RELEASE]
	at org.springframework.context.annotation.ConfigurationClassBeanDefinitionReader.loadBeanDefinitionsForConfigurationClass(ConfigurationClassBeanDefinitionReader.java:146) ~[spring-context-5.0.11.RELEASE.jar:5.0.11.RELEASE]
	at org.springframework.context.annotation.ConfigurationClassBeanDefinitionReader.loadBeanDefinitions(ConfigurationClassBeanDefinitionReader.java:118) ~[spring-context-5.0.11.RELEASE.jar:5.0.11.RELEASE]
	at org.springframework.context.annotation.ConfigurationClassPostProcessor.processConfigBeanDefinitions(ConfigurationClassPostProcessor.java:328) ~[spring-context-5.0.11.RELEASE.jar:5.0.11.RELEASE]
	at org.springframework.context.annotation.ConfigurationClassPostProcessor.postProcessBeanDefinitionRegistry(ConfigurationClassPostProcessor.java:233) ~[spring-context-5.0.11.RELEASE.jar:5.0.11.RELEASE]
	at org.springframework.context.support.PostProcessorRegistrationDelegate.invokeBeanDefinitionRegistryPostProcessors(PostProcessorRegistrationDelegate.java:271) ~[spring-context-5.0.11.RELEASE.jar:5.0.11.RELEASE]
	at org.springframework.context.support.PostProcessorRegistrationDelegate.invokeBeanFactoryPostProcessors(PostProcessorRegistrationDelegate.java:91) ~[spring-context-5.0.11.RELEASE.jar:5.0.11.RELEASE]
	at org.springframework.context.support.AbstractApplicationContext.invokeBeanFactoryPostProcessors(AbstractApplicationContext.java:692) ~[spring-context-5.0.11.RELEASE.jar:5.0.11.RELEASE]
	at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:530) ~[spring-context-5.0.11.RELEASE.jar:5.0.11.RELEASE]
	at org.springframework.boot.web.servlet.context.ServletWebServerApplicationContext.refresh(ServletWebServerApplicationContext.java:142) ~[spring-boot-2.0.7.RELEASE.jar:2.0.7.RELEASE]
	at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:754) [spring-boot-2.0.7.RELEASE.jar:2.0.7.RELEASE]
	at org.springframework.boot.SpringApplication.refreshContext(SpringApplication.java:386) [spring-boot-2.0.7.RELEASE.jar:2.0.7.RELEASE]
	at org.springframework.boot.SpringApplication.run(SpringApplication.java:307) [spring-boot-2.0.7.RELEASE.jar:2.0.7.RELEASE]
	at org.springframework.boot.SpringApplication.run(SpringApplication.java:1242) [spring-boot-2.0.7.RELEASE.jar:2.0.7.RELEASE]
	at org.springframework.boot.SpringApplication.run(SpringApplication.java:1230) [spring-boot-2.0.7.RELEASE.jar:2.0.7.RELEASE]
	at com.online.edu.eduservice.EduServiceApplication.main(EduServiceApplication.java:13) [classes/:na]
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[na:1.8.0_231]
	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) ~[na:1.8.0_231]
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[na:1.8.0_231]
	at java.lang.reflect.Method.invoke(Method.java:498) ~[na:1.8.0_231]
	at org.springframework.boot.devtools.restart.RestartLauncher.run(RestartLauncher.java:49) [spring-boot-devtools-2.0.7.RELEASE.jar:2.0.7.RELEASE]

问题描述：
启动服务模块失败，报此异常。

异常分析：主机名不合法，也就是服务注册名不合法

解决方案：
	1、@FeignClient("xueyuan_vidservice")这是异常期间Feign调用注解，可以看到主机名使用的是下划线，就是这里不合法，要将下划线改为中线-。
	2、去被调用服务的配置文件中更改
		# 服务名
		spring.application.name=xueyuan-vidservice