• 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
  • 相关阅读:
    最有价值的专家--微软官方网站
    CC++初学者编程教程(16) 搭建Xcode cocos2dx开发环境--尹成老师博客
    微软最具价值的专家之毛星云博客
    Winsock IO模型之IOCP模型
    IOCP模型与网络编程
    关于proc索引的创建
    查找表存在于那些proc中
    Sql 时间做条件
    Sql 无指定条件，防并发update
    sql 根据客户需用 增减查询字段
  • 原文地址：https://www.cnblogs.com/jpfss/p/11314271.html
Copyright © 2020-2023  润新知