SpringCloud错误集：java.lang.IllegalArgumentException: Illegal character in scheme name at index 0:

SpringCloud错误集：java.lang.IllegalArgumentException: Illegal character in scheme name at index 0:

错误描述：

使用SpringCloud创建服务提供者并向Eureka Server高可用节点里注册服务时出现以下错误

java.lang.IllegalArgumentException: Illegal character in scheme name at index 0:  http://peer2:8762/eureka/
    at java.net.URI.create(URI.java:852) ~[na:1.8.0_161]
    at com.sun.jersey.api.client.Client.resource(Client.java:434) ~[jersey-client-1.19.1.jar:1.19.1]
    at com.netflix.discovery.shared.transport.jersey.AbstractJerseyEurekaHttpClient.getApplicationsInternal(AbstractJerseyEurekaHttpClient.java:187) ~[eureka-client-1.7.0.jar:1.7.0]
    at com.netflix.discovery.shared.transport.jersey.AbstractJerseyEurekaHttpClient.getApplications(AbstractJerseyEurekaHttpClient.java:165) ~[eureka-client-1.7.0.jar:1.7.0]
    at com.netflix.discovery.shared.transport.decorator.EurekaHttpClientDecorator$6.execute(EurekaHttpClientDecorator.java:137) [eureka-client-1.7.0.jar:1.7.0]
    at com.netflix.discovery.shared.transport.decorator.MetricsCollectingEurekaHttpClient.execute(MetricsCollectingEurekaHttpClient.java:73) ~[eureka-client-1.7.0.jar:1.7.0]
    at com.netflix.discovery.shared.transport.decorator.EurekaHttpClientDecorator.getApplications(EurekaHttpClientDecorator.java:134) [eureka-client-1.7.0.jar:1.7.0]
    at com.netflix.discovery.shared.transport.decorator.EurekaHttpClientDecorator$6.execute(EurekaHttpClientDecorator.java:137) [eureka-client-1.7.0.jar:1.7.0]
    at com.netflix.discovery.shared.transport.decorator.RedirectingEurekaHttpClient.executeOnNewServer(RedirectingEurekaHttpClient.java:118) ~[eureka-client-1.7.0.jar:1.7.0]
    at com.netflix.discovery.shared.transport.decorator.RedirectingEurekaHttpClient.execute(RedirectingEurekaHttpClient.java:79) ~[eureka-client-1.7.0.jar:1.7.0]
    at com.netflix.discovery.shared.transport.decorator.EurekaHttpClientDecorator.getApplications(EurekaHttpClientDecorator.java:134) [eureka-client-1.7.0.jar:1.7.0]
    at com.netflix.discovery.shared.transport.decorator.EurekaHttpClientDecorator$6.execute(EurekaHttpClientDecorator.java:137) [eureka-client-1.7.0.jar:1.7.0]
    at com.netflix.discovery.shared.transport.decorator.RetryableEurekaHttpClient.execute(RetryableEurekaHttpClient.java:119) [eureka-client-1.7.0.jar:1.7.0]
    at com.netflix.discovery.shared.transport.decorator.EurekaHttpClientDecorator.getApplications(EurekaHttpClientDecorator.java:134) [eureka-client-1.7.0.jar:1.7.0]
    at com.netflix.discovery.shared.transport.decorator.EurekaHttpClientDecorator$6.execute(EurekaHttpClientDecorator.java:137) [eureka-client-1.7.0.jar:1.7.0]
    at com.netflix.discovery.shared.transport.decorator.SessionedEurekaHttpClient.execute(SessionedEurekaHttpClient.java:77) [eureka-client-1.7.0.jar:1.7.0]
    at com.netflix.discovery.shared.transport.decorator.EurekaHttpClientDecorator.getApplications(EurekaHttpClientDecorator.java:134) [eureka-client-1.7.0.jar:1.7.0]
    at com.netflix.discovery.DiscoveryClient.getAndStoreFullRegistry(DiscoveryClient.java:1022) [eureka-client-1.7.0.jar:1.7.0]
    at com.netflix.discovery.DiscoveryClient.fetchRegistry(DiscoveryClient.java:936) [eureka-client-1.7.0.jar:1.7.0]
    at com.netflix.discovery.DiscoveryClient.(DiscoveryClient.java:412) [eureka-client-1.7.0.jar:1.7.0]
    at com.netflix.discovery.DiscoveryClient.(DiscoveryClient.java:267) [eureka-client-1.7.0.jar:1.7.0]
    at org.springframework.cloud.netflix.eureka.CloudEurekaClient.(CloudEurekaClient.java:61) [spring-cloud-netflix-eureka-client-1.4.0.RELEASE.jar:1.4.0.RELEASE]
    at org.springframework.cloud.netflix.eureka.EurekaClientAutoConfiguration$RefreshableEurekaClientConfiguration.eurekaClient(EurekaClientAutoConfiguration.java:261) [spring-cloud-netflix-eureka-client-1.4.0.RELEASE.jar:1.4.0.RELEASE]
    at org.springframework.cloud.netflix.eureka.EurekaClientAutoConfiguration$RefreshableEurekaClientConfiguration$$EnhancerBySpringCGLIB$$de19d351.CGLIB$eurekaClient$0() [spring-cloud-netflix-eureka-client-1.4.0.RELEASE.jar:1.4.0.RELEASE]
    at org.springframework.cloud.netflix.eureka.EurekaClientAutoConfiguration$RefreshableEurekaClientConfiguration$$EnhancerBySpringCGLIB$$de19d351$$FastClassBySpringCGLIB$$54572f56.invoke() [spring-cloud-netflix-eureka-client-1.4.0.RELEASE.jar:1.4.0.RELEASE]
    at org.springframework.cglib.proxy.MethodProxy.invokeSuper(MethodProxy.java:228) [spring-core-4.3.12.RELEASE.jar:4.3.12.RELEASE]
    at org.springframework.context.annotation.ConfigurationClassEnhancer$BeanMethodInterceptor.intercept(ConfigurationClassEnhancer.java:358) [spring-context-4.3.12.RELEASE.jar:4.3.12.RELEASE]
    at org.springframework.cloud.netflix.eureka.EurekaClientAutoConfiguration$RefreshableEurekaClientConfiguration$$EnhancerBySpringCGLIB$$de19d351.eurekaClient() [spring-cloud-netflix-eureka-client-1.4.0.RELEASE.jar:1.4.0.RELEASE]
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[na:1.8.0_161]
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) ~[na:1.8.0_161]
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[na:1.8.0_161]
    at java.lang.reflect.Method.invoke(Method.java:498) ~[na:1.8.0_161]
    at org.springframework.beans.factory.support.SimpleInstantiationStrategy.instantiate(SimpleInstantiationStrategy.java:162) [spring-beans-4.3.12.RELEASE.jar:4.3.12.RELEASE]
    at org.springframework.beans.factory.support.ConstructorResolver.instantiateUsingFactoryMethod(ConstructorResolver.java:588) [spring-beans-4.3.12.RELEASE.jar:4.3.12.RELEASE]
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.instantiateUsingFactoryMethod(AbstractAutowireCapableBeanFactory.java:1173) [spring-beans-4.3.12.RELEASE.jar:4.3.12.RELEASE]
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBeanInstance(AbstractAutowireCapableBeanFactory.java:1067) [spring-beans-4.3.12.RELEASE.jar:4.3.12.RELEASE]
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:513) [spring-beans-4.3.12.RELEASE.jar:4.3.12.RELEASE]
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:483) [spring-beans-4.3.12.RELEASE.jar:4.3.12.RELEASE]
    at org.springframework.beans.factory.support.AbstractBeanFactory$2.getObject(AbstractBeanFactory.java:345) [spring-beans-4.3.12.RELEASE.jar:4.3.12.RELEASE]
    at org.springframework.cloud.context.scope.GenericScope$BeanLifecycleWrapper.getBean(GenericScope.java:379) [spring-cloud-context-1.3.0.RELEASE.jar:1.3.0.RELEASE]
    at org.springframework.cloud.context.scope.GenericScope.get(GenericScope.java:181) [spring-cloud-context-1.3.0.RELEASE.jar:1.3.0.RELEASE]
    at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:340) [spring-beans-4.3.12.RELEASE.jar:4.3.12.RELEASE]
    at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:197) [spring-beans-4.3.12.RELEASE.jar:4.3.12.RELEASE]
    at org.springframework.aop.target.SimpleBeanTargetSource.getTarget(SimpleBeanTargetSource.java:35) [spring-aop-4.3.12.RELEASE.jar:4.3.12.RELEASE]
    at org.springframework.cloud.netflix.eureka.serviceregistry.EurekaRegistration.getTargetObject(EurekaRegistration.java:166) [spring-cloud-netflix-eureka-client-1.4.0.RELEASE.jar:1.4.0.RELEASE]
    at org.springframework.cloud.netflix.eureka.serviceregistry.EurekaRegistration.getEurekaClient(EurekaRegistration.java:155) [spring-cloud-netflix-eureka-client-1.4.0.RELEASE.jar:1.4.0.RELEASE]
    at org.springframework.cloud.netflix.eureka.serviceregistry.EurekaServiceRegistry.maybeInitializeClient(EurekaServiceRegistry.java:56) [spring-cloud-netflix-eureka-client-1.4.0.RELEASE.jar:1.4.0.RELEASE]
    at org.springframework.cloud.netflix.eureka.serviceregistry.EurekaServiceRegistry.register(EurekaServiceRegistry.java:37) [spring-cloud-netflix-eureka-client-1.4.0.RELEASE.jar:1.4.0.RELEASE]
    at org.springframework.cloud.netflix.eureka.serviceregistry.EurekaAutoServiceRegistration.start(EurekaAutoServiceRegistration.java:80) [spring-cloud-netflix-eureka-client-1.4.0.RELEASE.jar:1.4.0.RELEASE]
    at org.springframework.context.support.DefaultLifecycleProcessor.doStart(DefaultLifecycleProcessor.java:175) [spring-context-4.3.12.RELEASE.jar:4.3.12.RELEASE]
    at org.springframework.context.support.DefaultLifecycleProcessor.access$200(DefaultLifecycleProcessor.java:50) [spring-context-4.3.12.RELEASE.jar:4.3.12.RELEASE]
    at org.springframework.context.support.DefaultLifecycleProcessor$LifecycleGroup.start(DefaultLifecycleProcessor.java:348) [spring-context-4.3.12.RELEASE.jar:4.3.12.RELEASE]
    at org.springframework.context.support.DefaultLifecycleProcessor.startBeans(DefaultLifecycleProcessor.java:151) [spring-context-4.3.12.RELEASE.jar:4.3.12.RELEASE]
    at org.springframework.context.support.DefaultLifecycleProcessor.onRefresh(DefaultLifecycleProcessor.java:114) [spring-context-4.3.12.RELEASE.jar:4.3.12.RELEASE]
    at org.springframework.context.support.AbstractApplicationContext.finishRefresh(AbstractApplicationContext.java:880) [spring-context-4.3.12.RELEASE.jar:4.3.12.RELEASE]
    at org.springframework.boot.context.embedded.EmbeddedWebApplicationContext.finishRefresh(EmbeddedWebApplicationContext.java:144) [spring-boot-1.5.8.RELEASE.jar:1.5.8.RELEASE]
    at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:546) [spring-context-4.3.12.RELEASE.jar:4.3.12.RELEASE]
    at org.springframework.boot.context.embedded.EmbeddedWebApplicationContext.refresh(EmbeddedWebApplicationContext.java:122) [spring-boot-1.5.8.RELEASE.jar:1.5.8.RELEASE]
    at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:693) [spring-boot-1.5.8.RELEASE.jar:1.5.8.RELEASE]
    at org.springframework.boot.SpringApplication.refreshContext(SpringApplication.java:360) [spring-boot-1.5.8.RELEASE.jar:1.5.8.RELEASE]
    at org.springframework.boot.SpringApplication.run(SpringApplication.java:303) [spring-boot-1.5.8.RELEASE.jar:1.5.8.RELEASE]
    at org.springframework.boot.SpringApplication.run(SpringApplication.java:1118) [spring-boot-1.5.8.RELEASE.jar:1.5.8.RELEASE]
    at org.springframework.boot.SpringApplication.run(SpringApplication.java:1107) [spring-boot-1.5.8.RELEASE.jar:1.5.8.RELEASE]
    at cn.tyrone.springcloud.Application.main(Application.java:11) [classes/:na]
Caused by: java.net.URISyntaxException: Illegal character in scheme name at index 0:  http://peer2:8762/eureka/
    at java.net.URI$Parser.fail(URI.java:2848) ~[na:1.8.0_161]
    at java.net.URI$Parser.checkChars(URI.java:3021) ~[na:1.8.0_161]
    at java.net.URI$Parser.checkChar(URI.java:3031) ~[na:1.8.0_161]
    at java.net.URI$Parser.parse(URI.java:3047) ~[na:1.8.0_161]
    at java.net.URI.(URI.java:588) ~[na:1.8.0_161]
    at java.net.URI.create(URI.java:850) ~[na:1.8.0_161]
    ... 63 common frames omitted

错误分析

出现这个错误的原因是因为在服务提供者的application.yml配置文件中配置eureka client的址时掺入了特殊的字符，例如：空格符。
错误配置：

eureka:
  client:
    service-url:
      # defaultZone: http://localhost:8761/eureka/
      defaultZone: http://peer1:8761/eureka/, http://peer2:8762/eureka/

修正后的配置：

eureka:
  client:
    service-url:
      # defaultZone: http://localhost:8761/eureka/
      defaultZone: http://peer1:8761/eureka/,http://peer2:8762/eureka/

注意defaultZone两个地址之间的空格符消失了。