Eureka客户端无法连接服务注册中心

转载自：https://my.oschina.net/kousm/blog/2249003

服务端

application.yml配置

  1. spring:
  2.   application:
  3.     name: eureka-service
  4. eureka: 
  5.   client:
  6.     fetch-registry: 'false'
  7.     register-with-eureka: 'false'
  8.   server:
  9.     enable-self-preservation: false
  10.     eviction-interval-timer-in-ms: 100
  11. #eureka服务器端口
  12. server:
  13.   port: '21001'

EurekaApplication.java

  1. package org.gradle;
  2.  
  3. import org.springframework.boot.SpringApplication;
  4. import org.springframework.boot.autoconfigure.SpringBootApplication;
  5. import org.springframework.cloud.netflix.eureka.server.EnableEurekaServer;
  6.  
  7. @EnableEurekaServer //作为服务端注解
  8. @SpringBootApplication
  9. public class EurekaApplication {
  10.  
  11. 	public static void main(String[] args) throws Exception {
  12. 		SpringApplication.run(EurekaApplication.class, args);
  13. 	}
  14.  
  15. }

客户端

application.yml

  1. server:
  2.   port: '21002'
  3. eureka:
  4.   client:
  5.     serviceUrl:
  6.       defaultZone: http://服务端ip:21001/eureka/
  7.   instance:
  8.     instance-id: test-client
  9.     hostname: cloud-provider
  10.     preferIpAddress: true
  11.     ip-address: 客户端ip
  12. spring: 
  13.   application: 
  14.     name: test-client
  15.   http:
  16.     encoding:
  17.       force: true
  18.       charset: UTF-8
  19.       enabled: true

主入口类Application.java

  1. package org.gradle;
  2.  
  3. import org.springframework.boot.SpringApplication;
  4. import org.springframework.boot.autoconfigure.SpringBootApplication;
  5. import org.springframework.cloud.client.discovery.EnableDiscoveryClient;
  6.  
  7. @EnableDiscoveryClient
  8. @SpringBootApplication
  9. public class ApplicationClient {
  10. 	public static void main(String[] args) throws Exception {
  11. 		SpringApplication.run(ApplicationClient.class, args);
  12. 	}
  13. }

Controller类Person.java

  1. package org.gradle;
  2.  
  3. import org.springframework.web.bind.annotation.RequestMapping;
  4. import org.springframework.web.bind.annotation.RestController;
  5.  
  6. @RestController
  7. public class Person {
  8. 	@RequestMapping("/getName")
  9.     public String getName() {
  10.         return "hello eureka";
  11.     }
  12. }

eureka的服务注册中心可以正常启动起来，在启动客户端的服务的时候无法连接上注册中心。

部分报错信息如下：

  1. 2018-10-18 17:23:42.727  INFO 7852 --- [           main] com.netflix.discovery.DiscoveryClient    : Application is null : false
  2. 2018-10-18 17:23:42.727  INFO 7852 --- [           main] com.netflix.discovery.DiscoveryClient    : Registered Applications size is zero : true
  3. 2018-10-18 17:23:42.727  INFO 7852 --- [           main] com.netflix.discovery.DiscoveryClient    : Application version is -1: true
  4. 2018-10-18 17:23:42.727  INFO 7852 --- [           main] com.netflix.discovery.DiscoveryClient    : Getting all instance registry info from the eureka server
  5. 2018-10-18 17:23:44.792 ERROR 7852 --- [           main] c.n.d.s.t.d.RedirectingEurekaHttpClient  : Request execution error
  6.  
  7. com.sun.jersey.api.client.ClientHandlerException: java.net.ConnectException: Connection refused: connect
  8. 	at com.sun.jersey.client.apache4.ApacheHttpClient4Handler.handle(ApacheHttpClient4Handler.java:187) ~[jersey-apache-client4-1.19.1.jar:1.19.1]
  9. 	at com.sun.jersey.api.client.filter.GZIPContentEncodingFilter.handle(GZIPContentEncodingFilter.java:123) ~[jersey-client-1.19.1.jar:1.19.1]
  10. 	at com.netflix.discovery.EurekaIdentityHeaderFilter.handle(EurekaIdentityHeaderFilter.java:27) ~[eureka-client-1.7.0.jar:1.7.0]
  11. 	at com.sun.jersey.api.client.Client.handle(Client.java:652) ~[jersey-client-1.19.1.jar:1.19.1]
  12. 	at com.sun.jersey.api.client.WebResource.handle(WebResource.java:682) ~[jersey-client-1.19.1.jar:1.19.1]
  13. 	at com.sun.jersey.api.client.WebResource.access$200(WebResource.java:74) ~[jersey-client-1.19.1.jar:1.19.1]
  14. 	at com.sun.jersey.api.client.WebResource$Builder.get(WebResource.java:509) ~[jersey-client-1.19.1.jar:1.19.1]
  15. 	at com.netflix.discovery.shared.transport.jersey.AbstractJerseyEurekaHttpClient.getApplicationsInternal(AbstractJerseyEurekaHttpClient.java:194) ~[eureka-client-1.7.0.jar:1.7.0]
  16. 	at com.netflix.discovery.shared.transport.jersey.AbstractJerseyEurekaHttpClient.getApplications(AbstractJerseyEurekaHttpClient.java:165) ~[eureka-client-1.7.0.jar:1.7.0]
  17. 	at com.netflix.discovery.shared.transport.decorator.EurekaHttpClientDecorator$6.execute(EurekaHttpClientDecorator.java:137) [eureka-client-1.7.0.jar:1.7.0]
  18. 	at com.netflix.discovery.shared.transport.decorator.MetricsCollectingEurekaHttpClient.execute(MetricsCollectingEurekaHttpClient.java:73) ~[eureka-client-1.7.0.jar:1.7.0]
  19. 	at com.netflix.discovery.shared.transport.decorator.EurekaHttpClientDecorator.getApplications(EurekaHttpClientDecorator.java:134) [eureka-client-1.7.0.jar:1.7.0]
  20. 	at com.netflix.discovery.shared.transport.decorator.EurekaHttpClientDecorator$6.execute(EurekaHttpClientDecorator.java:137) [eureka-client-1.7.0.jar:1.7.0]
  21. 	at com.netflix.discovery.shared.transport.decorator.RedirectingEurekaHttpClient.executeOnNewServer(RedirectingEurekaHttpClient.java:118) ~[eureka-client-1.7.0.jar:1.7.0]
  22. 	at com.netflix.discovery.shared.transport.decorator.RedirectingEurekaHttpClient.execute(RedirectingEurekaHttpClient.java:79) ~[eureka-client-1.7.0.jar:1.7.0]
  23. 	at com.netflix.discovery.shared.transport.decorator.EurekaHttpClientDecorator.getApplications(EurekaHttpClientDecorator.java:134) [eureka-client-1.7.0.jar:1.7.0]
  24. 	at com.netflix.discovery.shared.transport.decorator.EurekaHttpClientDecorator$6.execute(EurekaHttpClientDecorator.java:137) [eureka-client-1.7.0.jar:1.7.0]
  25. 	at com.netflix.discovery.shared.transport.decorator.RetryableEurekaHttpClient.execute(RetryableEurekaHttpClient.java:119) [eureka-client-1.7.0.jar:1.7.0]
  26. 	at com.netflix.discovery.shared.transport.decorator.EurekaHttpClientDecorator.getApplications(EurekaHttpClientDecorator.java:134) [eureka-client-1.7.0.jar:1.7.0]
  27. 	at com.netflix.discovery.shared.transport.decorator.EurekaHttpClientDecorator$6.execute(EurekaHttpClientDecorator.java:137) [eureka-client-1.7.0.jar:1.7.0]
  28. 	at com.netflix.discovery.shared.transport.decorator.SessionedEurekaHttpClient.execute(SessionedEurekaHttpClient.java:77) [eureka-client-1.7.0.jar:1.7.0]
  29. 	at com.netflix.discovery.shared.transport.decorator.EurekaHttpClientDecorator.getApplications(EurekaHttpClientDecorator.java:134) [eureka-client-1.7.0.jar:1.7.0]
  30. 	at com.netflix.discovery.DiscoveryClient.getAndStoreFullRegistry(DiscoveryClient.java:1022) [eureka-client-1.7.0.jar:1.7.0]
  31. 	at com.netflix.discovery.DiscoveryClient.fetchRegistry(DiscoveryClient.java:936) [eureka-client-1.7.0.jar:1.7.0]
  32. 	at com.netflix.discovery.DiscoveryClient.<init>(DiscoveryClient.java:412) [eureka-client-1.7.0.jar:1.7.0]
  33. 	at com.netflix.discovery.DiscoveryClient.<init>(DiscoveryClient.java:267) [eureka-client-1.7.0.jar:1.7.0]
  34. 	at org.springframework.cloud.netflix.eureka.CloudEurekaClient.<init>(CloudEurekaClient.java:61) [spring-cloud-netflix-eureka-client-1.4.0.RELEASE.jar:1.4.0.RELEASE]
  35. 	at org.springframework.cloud.netflix.eureka.EurekaClientAutoConfiguration$RefreshableEurekaClientConfiguration.eurekaClient(EurekaClientAutoConfiguration.java:261) [spring-cloud-netflix-eureka-client-1.4.0.RELEASE.jar:1.4.0.RELEASE]
  36. 	at org.springframework.cloud.netflix.eureka.EurekaClientAutoConfiguration$RefreshableEurekaClientConfiguration$$EnhancerBySpringCGLIB$$5d9ea2ca.CGLIB$eurekaClient$0(<generated>) [spring-cloud-netflix-eureka-client-1.4.0.RELEASE.jar:1.4.0.RELEASE]
  37. 	at org.springframework.cloud.netflix.eureka.EurekaClientAutoConfiguration$RefreshableEurekaClientConfiguration$$EnhancerBySpringCGLIB$$5d9ea2ca$$FastClassBySpringCGLIB$$1d2b2b2c.invoke(<generated>) [spring-cloud-netflix-eureka-client-1.4.0.RELEASE.jar:1.4.0.RELEASE]
  38. 	at org.springframework.cglib.proxy.MethodProxy.invokeSuper(MethodProxy.java:228) [spring-core-4.3.13.RELEASE.jar:4.3.13.RELEASE]
  39. 	at org.springframework.context.annotation.ConfigurationClassEnhancer$BeanMethodInterceptor.intercept(ConfigurationClassEnhancer.java:358) [spring-context-4.3.13.RELEASE.jar:4.3.13.RELEASE]
  40. 	at org.springframework.cloud.netflix.eureka.EurekaClientAutoConfiguration$RefreshableEurekaClientConfiguration$$EnhancerBySpringCGLIB$$5d9ea2ca.eurekaClient(<generated>) [spring-cloud-netflix-eureka-client-1.4.0.RELEASE.jar:1.4.0.RELEASE]
  41. 	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[na:1.8.0_151]
  42. 	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) ~[na:1.8.0_151]
  43. 	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[na:1.8.0_151]
  44. 	at java.lang.reflect.Method.invoke(Method.java:498) ~[na:1.8.0_151]
  45. 	at org.springframework.beans.factory.support.SimpleInstantiationStrategy.instantiate(SimpleInstantiationStrategy.java:162) [spring-beans-4.3.13.RELEASE.jar:4.3.13.RELEASE]
  46. 	at org.springframework.beans.factory.support.ConstructorResolver.instantiateUsingFactoryMethod(ConstructorResolver.java:588) [spring-beans-4.3.13.RELEASE.jar:4.3.13.RELEASE]
  47. 	at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.instantiateUsingFactoryMethod(AbstractAutowireCapableBeanFactory.java:1173) [spring-beans-4.3.13.RELEASE.jar:4.3.13.RELEASE]
  48. 	at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBeanInstance(AbstractAutowireCapableBeanFactory.java:1067) [spring-beans-4.3.13.RELEASE.jar:4.3.13.RELEASE]
  49. 	at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:513) [spring-beans-4.3.13.RELEASE.jar:4.3.13.RELEASE]
  50. 	at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:483) [spring-beans-4.3.13.RELEASE.jar:4.3.13.RELEASE]
  51. 	at org.springframework.beans.factory.support.AbstractBeanFactory$2.getObject(AbstractBeanFactory.java:345) [spring-beans-4.3.13.RELEASE.jar:4.3.13.RELEASE]
  52. 	at org.springframework.cloud.context.scope.GenericScope$BeanLifecycleWrapper.getBean(GenericScope.java:379) [spring-cloud-context-1.3.0.RELEASE.jar:1.3.0.RELEASE]
  53. 	at org.springframework.cloud.context.scope.GenericScope.get(GenericScope.java:181) [spring-cloud-context-1.3.0.RELEASE.jar:1.3.0.RELEASE]
  54. 	at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:340) [spring-beans-4.3.13.RELEASE.jar:4.3.13.RELEASE]
  55. 	at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:197) [spring-beans-4.3.13.RELEASE.jar:4.3.13.RELEASE]
  56. 	at org.springframework.aop.target.SimpleBeanTargetSource.getTarget(SimpleBeanTargetSource.java:35) [spring-aop-4.3.13.RELEASE.jar:4.3.13.RELEASE]
  57. 	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]
  58. 	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]
  59. 	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]
  60. 	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]
  61. 	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]
  62. 	at org.springframework.context.support.DefaultLifecycleProcessor.doStart(DefaultLifecycleProcessor.java:175) [spring-context-4.3.13.RELEASE.jar:4.3.13.RELEASE]
  63. 	at org.springframework.context.support.DefaultLifecycleProcessor.access$200(DefaultLifecycleProcessor.java:50) [spring-context-4.3.13.RELEASE.jar:4.3.13.RELEASE]
  64. 	at org.springframework.context.support.DefaultLifecycleProcessor$LifecycleGroup.start(DefaultLifecycleProcessor.java:348) [spring-context-4.3.13.RELEASE.jar:4.3.13.RELEASE]
  65. 	at org.springframework.context.support.DefaultLifecycleProcessor.startBeans(DefaultLifecycleProcessor.java:151) [spring-context-4.3.13.RELEASE.jar:4.3.13.RELEASE]
  66. 	at org.springframework.context.support.DefaultLifecycleProcessor.onRefresh(DefaultLifecycleProcessor.java:114) [spring-context-4.3.13.RELEASE.jar:4.3.13.RELEASE]
  67. 	at org.springframework.context.support.AbstractApplicationContext.finishRefresh(AbstractApplicationContext.java:880) [spring-context-4.3.13.RELEASE.jar:4.3.13.RELEASE]
  68. 	at org.springframework.boot.context.embedded.EmbeddedWebApplicationContext.finishRefresh(EmbeddedWebApplicationContext.java:144) [spring-boot-1.5.9.RELEASE.jar:1.5.9.RELEASE]
  69. 	at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:546) [spring-context-4.3.13.RELEASE.jar:4.3.13.RELEASE]
  70. 	at org.springframework.boot.context.embedded.EmbeddedWebApplicationContext.refresh(EmbeddedWebApplicationContext.java:122) [spring-boot-1.5.9.RELEASE.jar:1.5.9.RELEASE]
  71. 	at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:693) [spring-boot-1.5.9.RELEASE.jar:1.5.9.RELEASE]
  72. 	at org.springframework.boot.SpringApplication.refreshContext(SpringApplication.java:360) [spring-boot-1.5.9.RELEASE.jar:1.5.9.RELEASE]
  73. 	at org.springframework.boot.SpringApplication.run(SpringApplication.java:303) [spring-boot-1.5.9.RELEASE.jar:1.5.9.RELEASE]
  74. 	at org.springframework.boot.SpringApplication.run(SpringApplication.java:1118) [spring-boot-1.5.9.RELEASE.jar:1.5.9.RELEASE]
  75. 	at org.springframework.boot.SpringApplication.run(SpringApplication.java:1107) [spring-boot-1.5.9.RELEASE.jar:1.5.9.RELEASE]
  76. 	at org.gradle.ApplicationClient.main(ApplicationClient.java:11) [bin/:na]
  77. Caused by: java.net.ConnectException: Connection refused: connect
  78. 	at java.net.DualStackPlainSocketImpl.waitForConnect(Native Method) ~[na:1.8.0_151]
  79. 	at java.net.DualStackPlainSocketImpl.socketConnect(DualStackPlainSocketImpl.java:85) ~[na:1.8.0_151]
  80. 	at java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:350) ~[na:1.8.0_151]
  81. 	at java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:206) ~[na:1.8.0_151]
  82. 	at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:188) ~[na:1.8.0_151]
  83. 	at java.net.PlainSocketImpl.connect(PlainSocketImpl.java:172) ~[na:1.8.0_151]
  84. 	at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392) ~[na:1.8.0_151]
  85. 	at java.net.Socket.connect(Socket.java:589) ~[na:1.8.0_151]
  86. 	at org.apache.http.conn.scheme.PlainSocketFactory.connectSocket(PlainSocketFactory.java:121) ~[httpclient-4.5.3.jar:4.5.3]
  87. 	at org.apache.http.impl.conn.DefaultClientConnectionOperator.openConnection(DefaultClientConnectionOperator.java:180) ~[httpclient-4.5.3.jar:4.5.3]
  88. 	at org.apache.http.impl.conn.AbstractPoolEntry.open(AbstractPoolEntry.java:144) ~[httpclient-4.5.3.jar:4.5.3]
  89. 	at org.apache.http.impl.conn.AbstractPooledConnAdapter.open(AbstractPooledConnAdapter.java:134) ~[httpclient-4.5.3.jar:4.5.3]
  90. 	at org.apache.http.impl.client.DefaultRequestDirector.tryConnect(DefaultRequestDirector.java:610) ~[httpclient-4.5.3.jar:4.5.3]
  91. 	at org.apache.http.impl.client.DefaultRequestDirector.execute(DefaultRequestDirector.java:445) ~[httpclient-4.5.3.jar:4.5.3]
  92. 	at org.apache.http.impl.client.AbstractHttpClient.doExecute(AbstractHttpClient.java:835) ~[httpclient-4.5.3.jar:4.5.3]
  93. 	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:118) ~[httpclient-4.5.3.jar:4.5.3]
  94. 	at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:56) ~[httpclient-4.5.3.jar:4.5.3]
  95. 	at com.sun.jersey.client.apache4.ApacheHttpClient4Handler.handle(ApacheHttpClient4Handler.java:173) ~[jersey-apache-client4-1.19.1.jar:1.19.1]
  96. 	... 68 common frames omitted

通过网上搜索，大部分的回答如下几种

    一、客户端配置文件中关键字需准守驼峰命名方式

  1. eureka:
  2.   client:
  3.     serviceUrl:
  4.       defaultZone: http://localhost:21001/eureka/

上述代码中的serviceUrl不应使用service-url，defaultZone不应使用default-zone

    二、eureka服务端应关闭鉴权

        需要在服务器端的配置文件中加入关闭鉴权的代码

  1. security: 
  2.   basic: 
  3.     enabled: false

    三、如果启动eureka服务端报这种错误，则需要禁止服务端作为客户端注册。默认情况下eureka的服务注册中心会将自己作为客户端来尝试注册。

        需要在服务端的配置文件中加入禁止注册的代码

  1. eureka: 
  2.   client:
  3.     fetch-registry: 'false'
  4.     register-with-eureka: 'false'

但是，上述三种方式依然没有解决我遇到的问题，最后发现是因为我客户端的配置文件位置放错了

application.yml文件应直接放在resources目录下：

重新启动服务，OK，成功。

原文地址;https://blog.csdn.net/qq_40460909/article/details/86248390

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原文地址：https://www.cnblogs.com/jpfss/p/11314271.html