1-记Eureka新版本客户端无法注册到服务问题_eureka注册不进去

1、Eureka客户端无法注册到服务端问题

版本说明：

• Spring Boot：3.0.9
• Spring Cloud：2022.0.4
• jdk：20

1、配置相关

(1) Eureka服务端

server:
  port: 8091
  # 此处如果配置了context-path,客户端那边的defaultZone就得修改为 http://localhost:8091/eureka/eureka
  # 服务端defaultZone修改为：http://localhost:8091/eureka
  servlet:
	context-path: /eureka
  
eureka:
  client:
    # 不需要获取服务端，将其改为false
    fetch-registry: false
    # 暂时不需要将自己注册到客户端
    register-with-eureka: false
    # 将eureka服务端指向自己
    service-url:
      defaultZone: http://localhost:8091/eureka
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（2）Eureka客户端

server:
  port: 8082
  servlet:
    context-path: /user
spring:
  application:
    name: userService
eureka:
  client:
    serviceUrl:
      defaultZone: http://localhost:8091
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2、报错问题：

DiscoveryClient_USERSERVICE/localhost:userService:8082 - was unable to refresh its cache! This periodic background refresh will be retried in 30 seconds. status = Cannot execute request on any known server stacktrace = com.netflix.discovery.shared.transport.TransportException: Cannot execute request on any known server
	at com.netflix.discovery.shared.transport.decorator.RetryableEurekaHttpClient.execute(RetryableEurekaHttpClient.java:112)
	at com.netflix.discovery.shared.transport.decorator.EurekaHttpClientDecorator.getApplications(EurekaHttpClientDecorator.java:134)
	at com.netflix.discovery.shared.transport.decorator.EurekaHttpClientDecorator$6.execute(EurekaHttpClientDecorator.java:137)
	at com.netflix.discovery.shared.transport.decorator.SessionedEurekaHttpClient.execute(SessionedEurekaHttpClient.java:77)
	at com.netflix.discovery.shared.transport.decorator.EurekaHttpClientDecorator.getApplications(EurekaHttpClientDecorator.java:134)
	at com.netflix.discovery.DiscoveryClient.getAndStoreFullRegistry(DiscoveryClient.java:1045)
	at com.netflix.discovery.DiscoveryClient.fetchRegistry(DiscoveryClient.java:958)
	at com.netflix.discovery.DiscoveryClient.refreshRegistry(DiscoveryClient.java:1475)
	at com.netflix.discovery.DiscoveryClient$CacheRefreshThread.run(DiscoveryClient.java:1442)
	at java.base/java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:577)
	at java.base/java.util.concurrent.FutureTask.run(FutureTask.java:317)
	at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1144)
	at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:642)
	at java.base/java.lang.Thread.run(Thread.java:1623)
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3、解决办法：在客户端修改

server:
  port: 8082
  servlet:
    context-path: /user
spring:
  application:
    name: userService
eureka:
  client:
    serviceUrl:
      # 给这个地址后面加上/eureka,  不论服务端这块地址是什么，都需要在其后面加上/eureka
      defaultZone: http://localhost:8091/eureka/eureka
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eureka访问地址：http://localhost:8091/eureka

此时也就能检测到实例了。

测试了最新版本：

• Spring Boot：3.2.0
• Spring Cloud：2023.0.4
• jdk：20