使用'Dalston.BUILD-SNAPSHOT'来实现spring-cloud-dependencies，使用spring boot'1.5.2.RELEASE' .
在我目前的设置中，我有
eureka服务器配置服务器（在随机端口上运行）
localhost上的Eureka服务器使用以下配置运行 .
server:
port: 8761
spring:
application:
name: EUREKA
cloud:
config:
enabled: false
eureka:
instance:
hostname: peer1
client:
serviceUrl:
defaultZone: http://localhost:8761/eureka/
registerWithEureka: false
fetchRegistry: false
server:
waitTimeInMsWhenSyncEmpty: 0
Config-server作为eureka客户端，具有以下配置
eureka:
instance:
instanceId: ${spring.cloud.client.hostname}:${spring.application.name}:${spring.application.instance_id:${random.uuid}}
client:
serviceUrl:
defaultZone: http://localhost:8761/eureka/,http://localhost:8762/eureka/
根据我的理解，eureka客户端尝试注册第一个serviceUrl（http://localhost:8761/eureka/），如果不可用，将尝试使用其他serviceUrl . 并且正如预期的那样发生，直到一段时间之后 .
然而今天我观察到，eureka客户端首先尝试注册“http://localhost:8762/eureka/”并且因为8762上的eureka服务器未运行导致以下错误
2017-04-04 02:06:31.423 DEBUG 4558 --- [nfoReplicator-0] n.d.s.t.j.AbstractJerseyEurekaHttpClient : Jersey HTTP POST http://localhost:8762/eureka//apps/CONFIGSERVER with instance 192.168.1.2:CONFIGSERVER:d2b5e5fa-a0e2-48a5-98c9-53fd362dd3d7; statusCode=N/A
2017-04-04 02:06:31.425 ERROR 4558 --- [nfoReplicator-0] c.n.d.s.t.d.RedirectingEurekaHttpClient : Request execution error
com.sun.jersey.api.client.ClientHandlerException: java.net.ConnectException: Connection refused
at com.sun.jersey.client.apache4.ApacheHttpClient4Handler.handle(ApacheHttpClient4Handler.java:187) ~[jersey-apache-client4-1.19.1.jar:1.19.1]
at com.sun.jersey.api.client.filter.GZIPContentEncodingFilter.handle(GZIPContentEncodingFilter.java:123) ~[jersey-client-1.19.1.jar:1.19.1]
at com.netflix.discovery.EurekaIdentityHeaderFilter.handle(EurekaIdentityHeaderFilter.java:27) ~[eureka-client-1.6.2.jar:1.6.2]
at com.sun.jersey.api.client.Client.handle(Client.java:652) ~[jersey-client-1.19.1.jar:1.19.1]
at com.sun.jersey.api.client.WebResource.handle(WebResource.java:682) ~[jersey-client-1.19.1.jar:1.19.1]
at com.sun.jersey.api.client.WebResource.access$200(WebResource.java:74) ~[jersey-client-1.19.1.jar:1.19.1]
at com.sun.jersey.api.client.WebResource$Builder.post(WebResource.java:570) ~[jersey-client-1.19.1.jar:1.19.1]
at com.netflix.discovery.shared.transport.jersey.AbstractJerseyEurekaHttpClient.register(AbstractJerseyEurekaHttpClient.java:56) ~[eureka-client-1.6.2.jar:1.6.2]
at com.netflix.discovery.shared.transport.decorator.EurekaHttpClientDecorator$1.execute(EurekaHttpClientDecorator.java:59) [eureka-client-1.6.2.jar:1.6.2]
at com.netflix.discovery.shared.transport.decorator.MetricsCollectingEurekaHttpClient.execute(MetricsCollectingEurekaHttpClient.java:73) ~[eureka-client-1.6.2.jar:1.6.2]
at com.netflix.discovery.shared.transport.decorator.EurekaHttpClientDecorator.register(EurekaHttpClientDecorator.java:56) [eureka-client-1.6.2.jar:1.6.2]
at com.netflix.discovery.shared.transport.decorator.EurekaHttpClientDecorator$1.execute(EurekaHttpClientDecorator.java:59) [eureka-client-1.6.2.jar:1.6.2]
at com.netflix.discovery.shared.transport.decorator.RedirectingEurekaHttpClient.executeOnNewServer(RedirectingEurekaHttpClient.java:118) ~[eureka-client-1.6.2.jar:1.6.2]
at com.netflix.discovery.shared.transport.decorator.RedirectingEurekaHttpClient.execute(RedirectingEurekaHttpClient.java:79) ~[eureka-client-1.6.2.jar:1.6.2]
at com.netflix.discovery.shared.transport.decorator.EurekaHttpClientDecorator.register(EurekaHttpClientDecorator.java:56) [eureka-client-1.6.2.jar:1.6.2]
at com.netflix.discovery.shared.transport.decorator.EurekaHttpClientDecorator$1.execute(EurekaHttpClientDecorator.java:59) [eureka-client-1.6.2.jar:1.6.2]
at com.netflix.discovery.shared.transport.decorator.RetryableEurekaHttpClient.execute(RetryableEurekaHttpClient.java:119) [eureka-client-1.6.2.jar:1.6.2]
at com.netflix.discovery.shared.transport.decorator.EurekaHttpClientDecorator.register(EurekaHttpClientDecorator.java:56) [eureka-client-1.6.2.jar:1.6.2]
at com.netflix.discovery.shared.transport.decorator.EurekaHttpClientDecorator$1.execute(EurekaHttpClientDecorator.java:59) [eureka-client-1.6.2.jar:1.6.2]
at com.netflix.discovery.shared.transport.decorator.SessionedEurekaHttpClient.execute(SessionedEurekaHttpClient.java:77) [eureka-client-1.6.2.jar:1.6.2]
at com.netflix.discovery.shared.transport.decorator.EurekaHttpClientDecorator.register(EurekaHttpClientDecorator.java:56) [eureka-client-1.6.2.jar:1.6.2]
at com.netflix.discovery.DiscoveryClient.register(DiscoveryClient.java:798) [eureka-client-1.6.2.jar:1.6.2]
at com.netflix.discovery.InstanceInfoReplicator.run(InstanceInfoReplicator.java:104) [eureka-client-1.6.2.jar:1.6.2]
at com.netflix.discovery.InstanceInfoReplicator$1.run(InstanceInfoReplicator.java:88) [eureka-client-1.6.2.jar:1.6.2]
at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511) [na:1.8.0_66]
at java.util.concurrent.FutureTask.run(FutureTask.java:266) [na:1.8.0_66]
at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180) [na:1.8.0_66]
at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293) [na:1.8.0_66]
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142) [na:1.8.0_66]
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617) [na:1.8.0_66]
at java.lang.Thread.run(Thread.java:745) [na:1.8.0_66]
Caused by: java.net.ConnectException: Connection refused
at java.net.PlainSocketImpl.socketConnect(Native Method) ~[na:1.8.0_66]
at java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:350) ~[na:1.8.0_66]
at java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:206) ~[na:1.8.0_66]
at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:188) ~[na:1.8.0_66]
at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392) ~[na:1.8.0_66]
at java.net.Socket.connect(Socket.java:589) ~[na:1.8.0_66]
at org.apache.http.conn.scheme.PlainSocketFactory.connectSocket(PlainSocketFactory.java:121) ~[httpclient-4.5.3.jar:4.5.3]
at org.apache.http.impl.conn.DefaultClientConnectionOperator.openConnection(DefaultClientConnectionOperator.java:180) ~[httpclient-4.5.3.jar:4.5.3]
at org.apache.http.impl.conn.AbstractPoolEntry.open(AbstractPoolEntry.java:144) ~[httpclient-4.5.3.jar:4.5.3]
at org.apache.http.impl.conn.AbstractPooledConnAdapter.open(AbstractPooledConnAdapter.java:134) ~[httpclient-4.5.3.jar:4.5.3]
at org.apache.http.impl.client.DefaultRequestDirector.tryConnect(DefaultRequestDirector.java:610) ~[httpclient-4.5.3.jar:4.5.3]
at org.apache.http.impl.client.DefaultRequestDirector.execute(DefaultRequestDirector.java:445) ~[httpclient-4.5.3.jar:4.5.3]
at org.apache.http.impl.client.AbstractHttpClient.doExecute(AbstractHttpClient.java:835) ~[httpclient-4.5.3.jar:4.5.3]
at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:118) ~[httpclient-4.5.3.jar:4.5.3]
at org.apache.http.impl.client.CloseableHttpClient.execute(CloseableHttpClient.java:56) ~[httpclient-4.5.3.jar:4.5.3]
at com.sun.jersey.client.apache4.ApacheHttpClient4Handler.handle(ApacheHttpClient4Handler.java:173) ~[jersey-apache-client4-1.19.1.jar:1.19.1]
... 30 common frames omitted
但是，如果我将serviceUrl的顺序更改为
eureka:
client:
serviceUrl:
defaultZone: http://localhost:8762/eureka/,http://localhost:8761/eureka/
Eureka客户端已在8761上注册，没有任何错误 .
我可以从“com.netflix.discovery.shared.resolver.aws.ZoneAffinityClusterResolver”中看到下面的代码，它随机化了serviceUrl以注册客户端 .
public List<AwsEndpoint> getClusterEndpoints() {
List[] parts = ResolverUtils.splitByZone(this.delegate.getClusterEndpoints(), this.myZone);
List myZoneEndpoints = parts[0];
List remainingEndpoints = parts[1];
List randomizedList = randomizeAndMerge(myZoneEndpoints, remainingEndpoints);
if(!this.zoneAffinity) {
Collections.reverse(randomizedList);
}
if(logger.isDebugEnabled()) {
logger.debug("Local zone={}; resolved to: {}", this.myZone, randomizedList);
}
return randomizedList;
}
如果我不正确地理解它或者最近对eureka客户注册方式的任何更改，请建议 .