?

　　springCloud的eureka高可用配置方案思路是：幾個服務之間相互注冊，比如兩個服務，A注冊到B上，B注冊到A上，如果是三個服務則是：A注冊到BC上，B注冊到AC上，C注冊到AB上，這樣就會在幾個服務間進行同步，同時服務提供方向三個服務均注冊，這樣就會保證當一個服務宕機的時候，不影響整個系統的正常運行，從而保證了eureka的高可用。本博主在最后驗證了服務提供方僅注冊到其中一個的方法，其高可靠性也是有保障的。所以服務提供方只需向服務注冊中心之一提供注冊就可以了，他們之間可以自行同步，保證高可用性。

　　下面貼出主要的配置代碼，其他的都一樣，我們在這里主要貼出yml配置和控制臺效果

8880

1 #本項目端口 2 server: 3 port: 8880 4 #定義應用名稱為order 5 spring: 6 application: 7 name: server 8 #服務注冊中心實例主機名 9 eureka: 10 instance: 11 hostname: host 12 client: 13 #是否向注冊中心注冊自己 14 register-with-eureka: false 15 #是否獲取注冊表 16 fetch-registry: false 17 service-url: 18 defaultZone: http://127.0.0.1:8881/eureka/,http://127.0.0.1:8882/eureka/ 19

8881

1 #本項目端口 2 server: 3 port: 8881 4 #定義應用名稱為order 5 spring: 6 application: 7 name: server1 8 #服務注冊中心實例主機名 9 eureka: 10 instance: 11 hostname: host1 12 client: 13 #是否向注冊中心注冊自己 14 register-with-eureka: false 15 #是否獲取注冊表 16 fetch-registry: false 17 service-url: 18 defaultZone: http://127.0.0.1:8880/eureka/,http://127.0.0.1:8882/eureka/ 19

8882

1 server: 2 port: 8882 3 #定義應用名稱為order 4 spring: 5 application: 6 name: server2 7 #服務注冊中心實例主機名 8 eureka: 9 instance: 10 hostname: host2 11 client: 12 #是否向注冊中心注冊自己 13 register-with-eureka: true 14 #是否獲取注冊表 15 fetch-registry: false 16 #服務地址 17 service-url: 18 defaultZone: http://127.0.0.1:8880/eureka/,http://127.0.0.1:8881/eureka/

注意8880和8881未向自己注冊，8002向自己注冊，分別啟動服務，8880和8881均未出現任何報錯，而8882啟動成功后會有超時報錯信息

1 2018-09-20 10:16:13.038 INFO 7944 --- [ main] s.c.a.AnnotationConfigApplicationContext : Refreshing org.springframework.context.annotation.AnnotationConfigApplicationContext@4ec4f3a0: startup date [Thu Sep 20 10:16:13 CST 2018]; root of context hierarchy 2 2018-09-20 10:16:13.286 INFO 7944 --- [ main] f.a.AutowiredAnnotationBeanPostProcessor : JSR-330 'javax.inject.Inject' annotation found and supported for autowiring 3 2018-09-20 10:16:13.307 INFO 7944 --- [ main] trationDelegate$BeanPostProcessorChecker : Bean 'configurationPropertiesRebinderAutoConfiguration' of type [org.springframework.cloud.autoconfigure.ConfigurationPropertiesRebinderAutoConfiguration$$EnhancerBySpringCGLIB$$fbb30aa3] is not eligible for getting processed by all BeanPostProcessors (for example: not eligible for auto-proxying) 4 5 . ____ _ __ _ _ 6 /\\ / ___'_ __ _ _(_)_ __ __ _ \ \ \ \ 7 ( ( )\___ | '_ | '_| | '_ \/ _` | \ \ \ \ 8 \\/ ___)| |_)| | | | | || (_| | ) ) ) ) 9 ' |____| .__|_| |_|_| |_\__, | / / / / 10 =========|_|==============|___/=/_/_/_/ 11 :: Spring Boot :: (v2.0.5.RELEASE) 12 13 2018-09-20 10:16:13.560 INFO 7944 --- [ main] c.sharp.forward.EurekaServerApplication : No active profile set, falling back to default profiles: default 14 2018-09-20 10:16:13.574 INFO 7944 --- [ main] ConfigServletWebServerApplicationContext : Refreshing org.springframework.boot.web.servlet.context.AnnotationConfigServletWebServerApplicationContext@74589991: startup date [Thu Sep 20 10:16:13 CST 2018]; parent: org.springframework.context.annotation.AnnotationConfigApplicationContext@4ec4f3a0 15 2018-09-20 10:16:14.384 INFO 7944 --- [ main] o.s.cloud.context.scope.GenericScope : BeanFactory id=86aa96a4-8d41-33fd-af49-92950d537d77 16 2018-09-20 10:16:14.399 INFO 7944 --- [ main] f.a.AutowiredAnnotationBeanPostProcessor : JSR-330 'javax.inject.Inject' annotation found and supported for autowiring 17 2018-09-20 10:16:14.477 INFO 7944 --- [ main] trationDelegate$BeanPostProcessorChecker : Bean 'org.springframework.cloud.autoconfigure.ConfigurationPropertiesRebinderAutoConfiguration' of type [org.springframework.cloud.autoconfigure.ConfigurationPropertiesRebinderAutoConfiguration$$EnhancerBySpringCGLIB$$fbb30aa3] is not eligible for getting processed by all BeanPostProcessors (for example: not eligible for auto-proxying) 18 2018-09-20 10:16:14.932 INFO 7944 --- [ main] o.s.b.w.embedded.tomcat.TomcatWebServer : Tomcat initialized with port(s): 8880 (http) 19 2018-09-20 10:16:14.951 INFO 7944 --- [ main] o.apache.catalina.core.StandardService : Starting service [Tomcat] 20 2018-09-20 10:16:14.951 INFO 7944 --- [ main] org.apache.catalina.core.StandardEngine : Starting Servlet Engine: Apache Tomcat/8.5.34 21 2018-09-20 10:16:14.958 INFO 7944 --- [ost-startStop-1] o.a.catalina.core.AprLifecycleListener : The APR based Apache Tomcat Native library which allows optimal performance in production environments was not found on the java.library.path: [D:\topbandSoft\java\jre1.8\bin;C:\Windows\Sun\Java\bin;C:\Windows\system32;C:\Windows;D:/topbandSoft/java/jre1.8/bin/server;D:/topbandSoft/java/jre1.8/bin;D:/topbandSoft/java/jre1.8/lib/amd64;C:\Program Files (x86)\Common Files\Oracle\Java\javapath;C:\Windows\system32;C:\Windows;C:\Windows\System32\Wbem;C:\Windows\System32\WindowsPowerShell\v1.0\;C:\Program Files (x86)\Java\jre7;D:\topbandSoft\java\jdk1.8\bin;D:\topbandSoft\java\jdk1.8\jre\bin;D:\topbandSoft\git\Git\cmd;D:\topbandSoft\svn\bin;D:\topbandSoft\maven\apache-maven-3.3.9-bin\apache-maven-3.3.9\bin;C:\Program Files\bin;D:\topbandSoft\zookeeper/bin;D:\topbandSoft\zookeeper/conf;;D:\topbandSoft\eclipse4.8\eclipse;;.] 22 2018-09-20 10:16:15.067 INFO 7944 --- [ost-startStop-1] o.a.c.c.C.[Tomcat].[localhost].[/] : Initializing Spring embedded WebApplicationContext 23 2018-09-20 10:16:15.067 INFO 7944 --- [ost-startStop-1] o.s.web.context.ContextLoader : Root WebApplicationContext: initialization completed in 1493 ms 24 2018-09-20 10:16:15.230 WARN 7944 --- [ost-startStop-1] c.n.c.sources.URLConfigurationSource : No URLs will be polled as dynamic configuration sources. 25 2018-09-20 10:16:15.231 INFO 7944 --- [ost-startStop-1] 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. 26 2018-09-20 10:16:15.243 INFO 7944 --- [ost-startStop-1] c.netflix.config.DynamicPropertyFactory : DynamicPropertyFactory is initialized with configuration sources: com.netflix.config.ConcurrentCompositeConfiguration@7443d25a 27 2018-09-20 10:16:16.136 INFO 7944 --- [ost-startStop-1] o.s.b.w.servlet.FilterRegistrationBean : Mapping filter: 'characterEncodingFilter' to: [/*] 28 2018-09-20 10:16:16.136 INFO 7944 --- [ost-startStop-1] o.s.b.w.servlet.FilterRegistrationBean : Mapping filter: 'webMvcMetricsFilter' to: [/*] 29 2018-09-20 10:16:16.136 INFO 7944 --- [ost-startStop-1] o.s.b.w.servlet.FilterRegistrationBean : Mapping filter: 'hiddenHttpMethodFilter' to: [/*] 30 2018-09-20 10:16:16.136 INFO 7944 --- [ost-startStop-1] o.s.b.w.servlet.FilterRegistrationBean : Mapping filter: 'httpPutFormContentFilter' to: [/*] 31 2018-09-20 10:16:16.136 INFO 7944 --- [ost-startStop-1] o.s.b.w.servlet.FilterRegistrationBean : Mapping filter: 'requestContextFilter' to: [/*] 32 2018-09-20 10:16:16.137 INFO 7944 --- [ost-startStop-1] o.s.b.w.servlet.FilterRegistrationBean : Mapping filter: 'httpTraceFilter' to: [/*] 33 2018-09-20 10:16:16.137 INFO 7944 --- [ost-startStop-1] o.s.b.w.servlet.FilterRegistrationBean : Mapping filter: 'servletContainer' to urls: [/eureka/*] 34 2018-09-20 10:16:16.137 INFO 7944 --- [ost-startStop-1] o.s.b.w.servlet.ServletRegistrationBean : Servlet dispatcherServlet mapped to [/] 35 2018-09-20 10:16:16.201 INFO 7944 --- [ost-startStop-1] c.s.j.s.i.a.WebApplicationImpl : Initiating Jersey application, version 'Jersey: 1.19.1 03/11/2016 02:08 PM' 36 2018-09-20 10:16:16.251 INFO 7944 --- [ost-startStop-1] c.n.d.provider.DiscoveryJerseyProvider : Using JSON encoding codec LegacyJacksonJson 37 2018-09-20 10:16:16.252 INFO 7944 --- [ost-startStop-1] c.n.d.provider.DiscoveryJerseyProvider : Using JSON decoding codec LegacyJacksonJson 38 2018-09-20 10:16:16.348 INFO 7944 --- [ost-startStop-1] c.n.d.provider.DiscoveryJerseyProvider : Using XML encoding codec XStreamXml 39 2018-09-20 10:16:16.348 INFO 7944 --- [ost-startStop-1] c.n.d.provider.DiscoveryJerseyProvider : Using XML decoding codec XStreamXml 40 2018-09-20 10:16:16.561 WARN 7944 --- [ main] c.n.c.sources.URLConfigurationSource : No URLs will be polled as dynamic configuration sources. 41 2018-09-20 10:16:16.561 INFO 7944 --- [ main] 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. 42 2018-09-20 10:16:16.621 INFO 7944 --- [ main] o.s.w.s.handler.SimpleUrlHandlerMapping : Mapped URL path [/**/favicon.ico] onto handler of type [class org.springframework.web.servlet.resource.ResourceHttpRequestHandler] 43 2018-09-20 10:16:16.769 INFO 7944 --- [ main] s.w.s.m.m.a.RequestMappingHandlerAdapter : Looking for @ControllerAdvice: org.springframework.boot.web.servlet.context.AnnotationConfigServletWebServerApplicationContext@74589991: startup date [Thu Sep 20 10:16:13 CST 2018]; parent: org.springframework.context.annotation.AnnotationConfigApplicationContext@4ec4f3a0 44 2018-09-20 10:16:16.822 INFO 7944 --- [ main] s.w.s.m.m.a.RequestMappingHandlerMapping : Mapped "{[/error]}" onto public org.springframework.http.ResponseEntity<java.util.Map<java.lang.String, java.lang.Object>> org.springframework.boot.autoconfigure.web.servlet.error.BasicErrorController.error(javax.servlet.http.HttpServletRequest) 45 2018-09-20 10:16:16.823 INFO 7944 --- [ main] s.w.s.m.m.a.RequestMappingHandlerMapping : Mapped "{[/error],produces=[text/html]}" onto public org.springframework.web.servlet.ModelAndView org.springframework.boot.autoconfigure.web.servlet.error.BasicErrorController.errorHtml(javax.servlet.http.HttpServletRequest,javax.servlet.http.HttpServletResponse) 46 2018-09-20 10:16:16.832 INFO 7944 --- [ main] s.w.s.m.m.a.RequestMappingHandlerMapping : Mapped "{[/],methods=[GET]}" onto public java.lang.String org.springframework.cloud.netflix.eureka.server.EurekaController.status(javax.servlet.http.HttpServletRequest,java.util.Map<java.lang.String, java.lang.Object>) 47 2018-09-20 10:16:16.834 INFO 7944 --- [ main] s.w.s.m.m.a.RequestMappingHandlerMapping : Mapped "{[/lastn],methods=[GET]}" onto public java.lang.String org.springframework.cloud.netflix.eureka.server.EurekaController.lastn(javax.servlet.http.HttpServletRequest,java.util.Map<java.lang.String, java.lang.Object>) 48 2018-09-20 10:16:16.858 INFO 7944 --- [ main] o.s.w.s.handler.SimpleUrlHandlerMapping : Mapped URL path [/webjars/**] onto handler of type [class org.springframework.web.servlet.resource.ResourceHttpRequestHandler] 49 2018-09-20 10:16:16.858 INFO 7944 --- [ main] o.s.w.s.handler.SimpleUrlHandlerMapping : Mapped URL path [/**] onto handler of type [class org.springframework.web.servlet.resource.ResourceHttpRequestHandler] 50 2018-09-20 10:16:17.166 INFO 7944 --- [ main] o.s.ui.freemarker.SpringTemplateLoader : SpringTemplateLoader for FreeMarker: using resource loader [org.springframework.boot.web.servlet.context.AnnotationConfigServletWebServerApplicationContext@74589991: startup date [Thu Sep 20 10:16:13 CST 2018]; parent: org.springframework.context.annotation.AnnotationConfigApplicationContext@4ec4f3a0] and template loader path [classpath:/templates/] 51 2018-09-20 10:16:17.167 INFO 7944 --- [ main] o.s.w.s.v.f.FreeMarkerConfigurer : ClassTemplateLoader for Spring macros added to FreeMarker configuration 52 2018-09-20 10:16:17.321 INFO 7944 --- [ main] o.s.c.n.eureka.InstanceInfoFactory : Setting initial instance status as: STARTING 53 2018-09-20 10:16:17.353 INFO 7944 --- [ main] com.netflix.discovery.DiscoveryClient : Initializing Eureka in region us-east-1 54 2018-09-20 10:16:17.353 INFO 7944 --- [ main] com.netflix.discovery.DiscoveryClient : Client configured to neither register nor query for data. 55 2018-09-20 10:16:17.362 INFO 7944 --- [ main] com.netflix.discovery.DiscoveryClient : Discovery Client initialized at timestamp 1537409777361 with initial instances count: 0 56 2018-09-20 10:16:17.409 INFO 7944 --- [ main] c.n.eureka.DefaultEurekaServerContext : Initializing ... 57 2018-09-20 10:16:17.412 INFO 7944 --- [ main] c.n.eureka.cluster.PeerEurekaNodes : Adding new peer nodes [http://127.0.0.1:8881/eureka/, http://127.0.0.1:8882/eureka/] 58 2018-09-20 10:16:17.612 INFO 7944 --- [ main] c.n.d.provider.DiscoveryJerseyProvider : Using JSON encoding codec LegacyJacksonJson 59 2018-09-20 10:16:17.612 INFO 7944 --- [ main] c.n.d.provider.DiscoveryJerseyProvider : Using JSON decoding codec LegacyJacksonJson 60 2018-09-20 10:16:17.612 INFO 7944 --- [ main] c.n.d.provider.DiscoveryJerseyProvider : Using XML encoding codec XStreamXml 61 2018-09-20 10:16:17.612 INFO 7944 --- [ main] c.n.d.provider.DiscoveryJerseyProvider : Using XML decoding codec XStreamXml 62 2018-09-20 10:16:17.696 INFO 7944 --- [ main] c.n.d.provider.DiscoveryJerseyProvider : Using JSON encoding codec LegacyJacksonJson 63 2018-09-20 10:16:17.696 INFO 7944 --- [ main] c.n.d.provider.DiscoveryJerseyProvider : Using JSON decoding codec LegacyJacksonJson 64 2018-09-20 10:16:17.696 INFO 7944 --- [ main] c.n.d.provider.DiscoveryJerseyProvider : Using XML encoding codec XStreamXml 65 2018-09-20 10:16:17.696 INFO 7944 --- [ main] c.n.d.provider.DiscoveryJerseyProvider : Using XML decoding codec XStreamXml 66 2018-09-20 10:16:17.756 INFO 7944 --- [ main] c.n.eureka.cluster.PeerEurekaNodes : Replica node URL: http://127.0.0.1:8881/eureka/ 67 2018-09-20 10:16:17.756 INFO 7944 --- [ main] c.n.eureka.cluster.PeerEurekaNodes : Replica node URL: http://127.0.0.1:8882/eureka/ 68 2018-09-20 10:16:17.762 INFO 7944 --- [ main] c.n.e.registry.AbstractInstanceRegistry : Finished initializing remote region registries. All known remote regions: [] 69 2018-09-20 10:16:17.763 INFO 7944 --- [ main] c.n.eureka.DefaultEurekaServerContext : Initialized 70 2018-09-20 10:16:17.784 INFO 7944 --- [ main] o.s.b.a.e.web.EndpointLinksResolver : Exposing 2 endpoint(s) beneath base path '/actuator' 71 2018-09-20 10:16:17.793 INFO 7944 --- [ main] s.b.a.e.w.s.WebMvcEndpointHandlerMapping : Mapped "{[/actuator/health],methods=[GET],produces=[application/vnd.spring-boot.actuator.v2+json || application/json]}" onto public java.lang.Object org.springframework.boot.actuate.endpoint.web.servlet.AbstractWebMvcEndpointHandlerMapping$OperationHandler.handle(javax.servlet.http.HttpServletRequest,java.util.Map<java.lang.String, java.lang.String>) 72 2018-09-20 10:16:17.793 INFO 7944 --- [ main] s.b.a.e.w.s.WebMvcEndpointHandlerMapping : Mapped "{[/actuator/info],methods=[GET],produces=[application/vnd.spring-boot.actuator.v2+json || application/json]}" onto public java.lang.Object org.springframework.boot.actuate.endpoint.web.servlet.AbstractWebMvcEndpointHandlerMapping$OperationHandler.handle(javax.servlet.http.HttpServletRequest,java.util.Map<java.lang.String, java.lang.String>) 73 2018-09-20 10:16:17.794 INFO 7944 --- [ main] s.b.a.e.w.s.WebMvcEndpointHandlerMapping : Mapped "{[/actuator],methods=[GET],produces=[application/vnd.spring-boot.actuator.v2+json || application/json]}" onto protected java.util.Map<java.lang.String, java.util.Map<java.lang.String, org.springframework.boot.actuate.endpoint.web.Link>> org.springframework.boot.actuate.endpoint.web.servlet.WebMvcEndpointHandlerMapping.links(javax.servlet.http.HttpServletRequest,javax.servlet.http.HttpServletResponse) 74 2018-09-20 10:16:17.831 INFO 7944 --- [ main] o.s.j.e.a.AnnotationMBeanExporter : Registering beans for JMX exposure on startup 75 2018-09-20 10:16:17.837 INFO 7944 --- [ main] o.s.j.e.a.AnnotationMBeanExporter : Bean with name 'environmentManager' has been autodetected for JMX exposure 76 2018-09-20 10:16:17.838 INFO 7944 --- [ main] o.s.j.e.a.AnnotationMBeanExporter : Bean with name 'refreshScope' has been autodetected for JMX exposure 77 2018-09-20 10:16:17.839 INFO 7944 --- [ main] o.s.j.e.a.AnnotationMBeanExporter : Bean with name 'configurationPropertiesRebinder' has been autodetected for JMX exposure 78 2018-09-20 10:16:17.841 INFO 7944 --- [ main] o.s.j.e.a.AnnotationMBeanExporter : Located managed bean 'environmentManager': registering with JMX server as MBean [org.springframework.cloud.context.environment:name=environmentManager,type=EnvironmentManager] 79 2018-09-20 10:16:17.848 INFO 7944 --- [ main] o.s.j.e.a.AnnotationMBeanExporter : Located managed bean 'refreshScope': registering with JMX server as MBean [org.springframework.cloud.context.scope.refresh:name=refreshScope,type=RefreshScope] 80 2018-09-20 10:16:17.855 INFO 7944 --- [ main] o.s.j.e.a.AnnotationMBeanExporter : Located managed bean 'configurationPropertiesRebinder': registering with JMX server as MBean [org.springframework.cloud.context.properties:name=configurationPropertiesRebinder,context=74589991,type=ConfigurationPropertiesRebinder] 81 2018-09-20 10:16:17.863 INFO 7944 --- [ main] o.s.c.support.DefaultLifecycleProcessor : Starting beans in phase 0 82 2018-09-20 10:16:17.867 INFO 7944 --- [ main] o.s.c.n.e.s.EurekaServiceRegistry : Registering application server with eureka with status UP 83 2018-09-20 10:16:17.881 INFO 7944 --- [ Thread-13] o.s.c.n.e.server.EurekaServerBootstrap : Setting the eureka configuration.. 84 2018-09-20 10:16:17.881 INFO 7944 --- [ Thread-13] o.s.c.n.e.server.EurekaServerBootstrap : Eureka data center value eureka.datacenter is not set, defaulting to default 85 2018-09-20 10:16:17.881 INFO 7944 --- [ Thread-13] o.s.c.n.e.server.EurekaServerBootstrap : Eureka environment value eureka.environment is not set, defaulting to test 86 2018-09-20 10:16:17.892 INFO 7944 --- [ Thread-13] o.s.c.n.e.server.EurekaServerBootstrap : isAws returned false 87 2018-09-20 10:16:17.892 INFO 7944 --- [ Thread-13] o.s.c.n.e.server.EurekaServerBootstrap : Initialized server context 88 2018-09-20 10:16:17.892 INFO 7944 --- [ Thread-13] c.n.e.r.PeerAwareInstanceRegistryImpl : Got 1 instances from neighboring DS node 89 2018-09-20 10:16:17.892 INFO 7944 --- [ Thread-13] c.n.e.r.PeerAwareInstanceRegistryImpl : Renew threshold is: 1 90 2018-09-20 10:16:17.892 INFO 7944 --- [ Thread-13] c.n.e.r.PeerAwareInstanceRegistryImpl : Changing status to UP 91 2018-09-20 10:16:17.908 INFO 7944 --- [ main] o.s.b.w.embedded.tomcat.TomcatWebServer : Tomcat started on port(s): 8880 (http) with context path '' 92 2018-09-20 10:16:17.909 INFO 7944 --- [ Thread-13] e.s.EurekaServerInitializerConfiguration : Started Eureka Server 93 2018-09-20 10:16:17.910 INFO 7944 --- [ main] .s.c.n.e.s.EurekaAutoServiceRegistration : Updating port to 8880 94 2018-09-20 10:16:17.912 INFO 7944 --- [ main] c.sharp.forward.EurekaServerApplication : Started EurekaServerApplication in 5.373 seconds (JVM running for 5.771) 95 2018-09-20 10:16:21.748 INFO 7944 --- [nio-8880-exec-1] o.a.c.c.C.[Tomcat].[localhost].[/] : Initializing Spring FrameworkServlet 'dispatcherServlet' 96 2018-09-20 10:16:21.748 INFO 7944 --- [nio-8880-exec-1] o.s.web.servlet.DispatcherServlet : FrameworkServlet 'dispatcherServlet': initialization started 97 2018-09-20 10:16:21.766 INFO 7944 --- [nio-8880-exec-1] o.s.web.servlet.DispatcherServlet : FrameworkServlet 'dispatcherServlet': initialization completed in 16 ms 98 2018-09-20 10:17:07.667 INFO 7944 --- [io-8880-exec-10] c.n.e.registry.AbstractInstanceRegistry : Registered instance SERVER2/hh-PC:server2:8882 with status UP (replication=false) 99 2018-09-20 10:17:08.688 ERROR 7944 --- [et_127.0.0.1-18] c.n.e.cluster.ReplicationTaskProcessor : It seems to be a socket read timeout exception, it will retry later. if it continues to happen and some eureka node occupied all the cpu time, you should set property 'eureka.server.peer-node-read-timeout-ms' to a bigger value 100 101 com.sun.jersey.api.client.ClientHandlerException: java.net.SocketTimeoutException: Read timed out 102 at com.sun.jersey.client.apache4.ApacheHttpClient4Handler.handle(ApacheHttpClient4Handler.java:187) ~[jersey-apache-client4-1.19.1.jar:1.19.1] 103 at com.netflix.eureka.cluster.DynamicGZIPContentEncodingFilter.handle(DynamicGZIPContentEncodingFilter.java:48) ~[eureka-core-1.9.3.jar:1.9.3] 104 at com.netflix.discovery.EurekaIdentityHeaderFilter.handle(EurekaIdentityHeaderFilter.java:27) ~[eureka-client-1.9.3.jar:1.9.3] 105 at com.sun.jersey.api.client.Client.handle(Client.java:652) ~[jersey-client-1.19.1.jar:1.19.1] 106 at com.sun.jersey.api.client.WebResource.handle(WebResource.java:682) ~[jersey-client-1.19.1.jar:1.19.1] 107 at com.sun.jersey.api.client.WebResource.access$200(WebResource.java:74) ~[jersey-client-1.19.1.jar:1.19.1] 108 at com.sun.jersey.api.client.WebResource$Builder.post(WebResource.java:570) ~[jersey-client-1.19.1.jar:1.19.1] 109 at com.netflix.eureka.transport.JerseyReplicationClient.submitBatchUpdates(JerseyReplicationClient.java:116) ~[eureka-core-1.9.3.jar:1.9.3] 110 at com.netflix.eureka.cluster.ReplicationTaskProcessor.process(ReplicationTaskProcessor.java:80) ~[eureka-core-1.9.3.jar:1.9.3] 111 at com.netflix.eureka.util.batcher.TaskExecutors$BatchWorkerRunnable.run(TaskExecutors.java:187) [eureka-core-1.9.3.jar:1.9.3] 112 at java.lang.Thread.run(Unknown Source) [na:1.8.0_171] 113 Caused by: java.net.SocketTimeoutException: Read timed out 114 at java.net.SocketInputStream.socketRead0(Native Method) ~[na:1.8.0_171] 115 at java.net.SocketInputStream.socketRead(Unknown Source) ~[na:1.8.0_171] 116 at java.net.SocketInputStream.read(Unknown Source) ~[na:1.8.0_171] 117 at java.net.SocketInputStream.read(Unknown Source) ~[na:1.8.0_171] 118 at org.apache.http.impl.io.AbstractSessionInputBuffer.fillBuffer(AbstractSessionInputBuffer.java:161) ~[httpcore-4.4.10.jar:4.4.10] 119 at org.apache.http.impl.io.SocketInputBuffer.fillBuffer(SocketInputBuffer.java:82) ~[httpcore-4.4.10.jar:4.4.10] 120 at org.apache.http.impl.io.AbstractSessionInputBuffer.readLine(AbstractSessionInputBuffer.java:278) ~[httpcore-4.4.10.jar:4.4.10] 121 at org.apache.http.impl.conn.DefaultHttpResponseParser.parseHead(DefaultHttpResponseParser.java:138) ~[httpclient-4.5.6.jar:4.5.6] 122 at org.apache.http.impl.conn.DefaultHttpResponseParser.parseHead(DefaultHttpResponseParser.java:56) ~[httpclient-4.5.6.jar:4.5.6] 123 at org.apache.http.impl.io.AbstractMessageParser.parse(AbstractMessageParser.java:259) ~[httpcore-4.4.10.jar:4.4.10] 124 at org.apache.http.impl.AbstractHttpClientConnection.receiveResponseHeader(AbstractHttpClientConnection.java:286) ~[httpcore-4.4.10.jar:4.4.10] 125 at org.apache.http.impl.conn.DefaultClientConnection.receiveResponseHeader(DefaultClientConnection.java:257) ~[httpclient-4.5.6.jar:4.5.6] 126 at org.apache.http.impl.conn.AbstractClientConnAdapter.receiveResponseHeader(AbstractClientConnAdapter.java:230) ~[httpclient-4.5.6.jar:4.5.6] 127 at org.apache.http.protocol.HttpRequestExecutor.doReceiveResponse(HttpRequestExecutor.java:273) ~[httpcore-4.4.10.jar:4.4.10] 128 at org.apache.http.protocol.HttpRequestExecutor.execute(HttpRequestExecutor.java:125) ~[httpcore-4.4.10.jar:4.4.10] 129 at org.apache.http.impl.client.DefaultRequestDirector.tryExecute(DefaultRequestDirector.java:684) ~[httpclient-4.5.6.jar:4.5.6] 130 at org.apache.http.impl.client.DefaultRequestDirector.execute(DefaultRequestDirector.java:486) ~[httpclient-4.5.6.jar:4.5.6] 131 at org.apache.http.impl.client.AbstractHttpClient.doExecute(AbstractHttpClient.java:835) ~[httpclient-4.5.6.jar:4.5.6] 132 at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:118) ~[httpclient-4.5.6.jar:4.5.6] 133 at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:56) ~[httpclient-4.5.6.jar:4.5.6] 134 at com.sun.jersey.client.apache4.ApacheHttpClient4Handler.handle(ApacheHttpClient4Handler.java:173) ~[jersey-apache-client4-1.19.1.jar:1.19.1] 135 ... 10 common frames omitted 136 137 2018-09-20 10:17:08.693 ERROR 7944 --- [et_127.0.0.1-16] c.n.e.cluster.ReplicationTaskProcessor : It seems to be a socket read timeout exception, it will retry later. if it continues to happen and some eureka node occupied all the cpu time, you should set property 'eureka.server.peer-node-read-timeout-ms' to a bigger value 138 139 com.sun.jersey.api.client.ClientHandlerException: java.net.SocketTimeoutException: Read timed out 140 at com.sun.jersey.client.apache4.ApacheHttpClient4Handler.handle(ApacheHttpClient4Handler.java:187) ~[jersey-apache-client4-1.19.1.jar:1.19.1] 141 at com.netflix.eureka.cluster.DynamicGZIPContentEncodingFilter.handle(DynamicGZIPContentEncodingFilter.java:48) ~[eureka-core-1.9.3.jar:1.9.3] 142 at com.netflix.discovery.EurekaIdentityHeaderFilter.handle(EurekaIdentityHeaderFilter.java:27) ~[eureka-client-1.9.3.jar:1.9.3] 143 at com.sun.jersey.api.client.Client.handle(Client.java:652) ~[jersey-client-1.19.1.jar:1.19.1] 144 at com.sun.jersey.api.client.WebResource.handle(WebResource.java:682) ~[jersey-client-1.19.1.jar:1.19.1] 145 at com.sun.jersey.api.client.WebResource.access$200(WebResource.java:74) ~[jersey-client-1.19.1.jar:1.19.1] 146 at com.sun.jersey.api.client.WebResource$Builder.post(WebResource.java:570) ~[jersey-client-1.19.1.jar:1.19.1] 147 at com.netflix.eureka.transport.JerseyReplicationClient.submitBatchUpdates(JerseyReplicationClient.java:116) ~[eureka-core-1.9.3.jar:1.9.3] 148 at com.netflix.eureka.cluster.ReplicationTaskProcessor.process(ReplicationTaskProcessor.java:80) ~[eureka-core-1.9.3.jar:1.9.3] 149 at com.netflix.eureka.util.batcher.TaskExecutors$BatchWorkerRunnable.run(TaskExecutors.java:187) [eureka-core-1.9.3.jar:1.9.3] 150 at java.lang.Thread.run(Unknown Source) [na:1.8.0_171] 151 Caused by: java.net.SocketTimeoutException: Read timed out 152 at java.net.SocketInputStream.socketRead0(Native Method) ~[na:1.8.0_171] 153 at java.net.SocketInputStream.socketRead(Unknown Source) ~[na:1.8.0_171] 154 at java.net.SocketInputStream.read(Unknown Source) ~[na:1.8.0_171] 155 at java.net.SocketInputStream.read(Unknown Source) ~[na:1.8.0_171] 156 at org.apache.http.impl.io.AbstractSessionInputBuffer.fillBuffer(AbstractSessionInputBuffer.java:161) ~[httpcore-4.4.10.jar:4.4.10] 157 at org.apache.http.impl.io.SocketInputBuffer.fillBuffer(SocketInputBuffer.java:82) ~[httpcore-4.4.10.jar:4.4.10] 158 at org.apache.http.impl.io.AbstractSessionInputBuffer.readLine(AbstractSessionInputBuffer.java:278) ~[httpcore-4.4.10.jar:4.4.10] 159 at org.apache.http.impl.conn.DefaultHttpResponseParser.parseHead(DefaultHttpResponseParser.java:138) ~[httpclient-4.5.6.jar:4.5.6] 160 at org.apache.http.impl.conn.DefaultHttpResponseParser.parseHead(DefaultHttpResponseParser.java:56) ~[httpclient-4.5.6.jar:4.5.6] 161 at org.apache.http.impl.io.AbstractMessageParser.parse(AbstractMessageParser.java:259) ~[httpcore-4.4.10.jar:4.4.10] 162 at org.apache.http.impl.AbstractHttpClientConnection.receiveResponseHeader(AbstractHttpClientConnection.java:286) ~[httpcore-4.4.10.jar:4.4.10] 163 at org.apache.http.impl.conn.DefaultClientConnection.receiveResponseHeader(DefaultClientConnection.java:257) ~[httpclient-4.5.6.jar:4.5.6] 164 at org.apache.http.impl.conn.AbstractClientConnAdapter.receiveResponseHeader(AbstractClientConnAdapter.java:230) ~[httpclient-4.5.6.jar:4.5.6] 165 at org.apache.http.protocol.HttpRequestExecutor.doReceiveResponse(HttpRequestExecutor.java:273) ~[httpcore-4.4.10.jar:4.4.10] 166 at org.apache.http.protocol.HttpRequestExecutor.execute(HttpRequestExecutor.java:125) ~[httpcore-4.4.10.jar:4.4.10] 167 at org.apache.http.impl.client.DefaultRequestDirector.tryExecute(DefaultRequestDirector.java:684) ~[httpclient-4.5.6.jar:4.5.6] 168 at org.apache.http.impl.client.DefaultRequestDirector.execute(DefaultRequestDirector.java:486) ~[httpclient-4.5.6.jar:4.5.6] 169 at org.apache.http.impl.client.AbstractHttpClient.doExecute(AbstractHttpClient.java:835) ~[httpclient-4.5.6.jar:4.5.6] 170 at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:118) ~[httpclient-4.5.6.jar:4.5.6] 171 at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:56) ~[httpclient-4.5.6.jar:4.5.6] 172 at com.sun.jersey.client.apache4.ApacheHttpClient4Handler.handle(ApacheHttpClient4Handler.java:173) ~[jersey-apache-client4-1.19.1.jar:1.19.1] 173 ... 10 common frames omitted 174 175 2018-09-20 10:17:17.897 INFO 7944 --- [a-EvictionTimer] c.n.e.registry.AbstractInstanceRegistry : Running the evict task with compensationTime 0ms 176 2018-09-20 10:18:17.897 INFO 7944 --- [a-EvictionTimer] c.n.e.registry.AbstractInstanceRegistry : Running the evict task with compensationTime 0ms 177 2018-09-20 10:19:17.898 INFO 7944 --- [a-EvictionTimer] c.n.e.registry.AbstractInstanceRegistry : Running the evict task with compensationTime 0ms 178 2018-09-20 10:20:17.898 INFO 7944 --- [a-EvictionTimer] c.n.e.registry.AbstractInstanceRegistry : Running the evict task with compensationTime 0ms 179 2018-09-20 10:21:17.899 INFO 7944 --- [a-EvictionTimer] c.n.e.registry.AbstractInstanceRegistry : Running the evict task with compensationTime 0ms 180 2018-09-20 10:22:17.899 INFO 7944 --- [a-EvictionTimer] c.n.e.registry.AbstractInstanceRegistry : Running the evict task with compensationTime 0ms View Code

這是因為服務向自己注冊的原因，不用理會

此時查看控制臺發現三個服務均注冊上了server2

如果三個服務都注冊自己，則三個均注冊上來，貼出其中一個圖看看

?

?這時，eureka的高可用服務其實已經配置好了，我們進行一個注冊服務，還是之前的client服務，配置文件修改后如下：

1 spring: 2 application: 3 name: client 4 server: 5 port: 8889 6 eureka: 7 client: 8 eureka-server-port: 8889 9 register-with-eureka: true 10 service-url: 11 defaultZone: http://127.0.0.1:8880/eureka/,http://127.0.0.1:8881/eureka/,http://127.0.0.1:8882/eureka/

啟動服務，三臺服務均注冊上

然后我們請求服務方地址，成功

此時驗證高可用性，我們停掉其中的1~2臺服務，再次訪問，仍然OK,說明高可用配置的成功,接下來我們把client的yml文件注冊地址只保留一個8880，再次測試，發現只注冊一個三個都會同步，當宕掉8880和其他任意一個，仍然可以成功調用接口，可見其高可用性能得到了較好保證。

?

總結

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