已解决 Request execution error. endpoint=DefaultEndpoint{ serviceUrl=‘http://localhost:8761/eureka/}

  requestexecutionerror.endpoint=defaultendpoint{serviceurl='http://localhost:8761/eureka/}注册中心报错

问题原因：可能就是yml文件有一步写错了然后照成报错

报错：

request execution error. endpoint=defaultendpoint{ serviceurl='http://127.0.0.1:8080/eureka/} exception=java.net.connectexception: connection refused: connect stacktrace=com.sun.jersey.api.client.clienthandlerexception: java.net.connectexception: connection refused: connect
	at com.sun.jersey.client.apache4.apachehttpclient4handler.handle(apachehttpclient4handler.java:187)
	at com.sun.jersey.api.client.filter.gzipcontentencodingfilter.handle(gzipcontentencodingfilter.java:123)
	at com.netflix.discovery.eurekaidentityheaderfilter.handle(eurekaidentityheaderfilter.java:27)
	at com.sun.jersey.api.client.client.handle(client.java:652)
	at com.sun.jersey.api.client.webresource.handle(webresource.java:682)
	at com.sun.jersey.api.client.webresource.access$200(webresource.java:74)
	at com.sun.jersey.api.client.webresource$builder.get(webresource.java:509)
	at com.netflix.discovery.shared.transport.jersey.abstractjerseyeurekahttpclient.getapplicationsinternal(abstractjerseyeurekahttpclient.java:196)
	at com.netflix.discovery.shared.transport.jersey.abstractjerseyeurekahttpclient.getdelta(abstractjerseyeurekahttpclient.java:172)
	at com.netflix.discovery.shared.transport.decorator.eurekahttpclientdecorator$7.execute(eurekahttpclientdecorator.java:152)
	at com.netflix.discovery.shared.transport.decorator.metricscollectingeurekahttpclient.execute(metricscollectingeurekahttpclient.java:73)
	at com.netflix.discovery.shared.transport.decorator.eurekahttpclientdecorator.getdelta(eurekahttpclientdecorator.java:149)
	at com.netflix.discovery.shared.transport.decorator.eurekahttpclientdecorator$7.execute(eurekahttpclientdecorator.java:152)
	at com.netflix.discovery.shared.transport.decorator.redirectingeurekahttpclient.execute(redirectingeurekahttpclient.java:91)
	at com.netflix.discovery.shared.transport.decorator.eurekahttpclientdecorator.getdelta(eurekahttpclientdecorator.java:149)
	at com.netflix.discovery.shared.transport.decorator.eurekahttpclientdecorator$7.execute(eurekahttpclientdecorator.java:152)
	at com.netflix.discovery.shared.transport.decorator.retryableeurekahttpclient.execute(retryableeurekahttpclient.java:120)
	at com.netflix.discovery.shared.transport.decorator.eurekahttpclientdecorator.getdelta(eurekahttpclientdecorator.java:149)
	at com.netflix.discovery.shared.transport.decorator.eurekahttpclientdecorator$7.execute(eurekahttpclientdecorator.java:152)
	at com.netflix.discovery.shared.transport.decorator.sessionedeurekahttpclient.execute(sessionedeurekahttpclient.java:77)
	at com.netflix.discovery.shared.transport.decorator.eurekahttpclientdecorator.getdelta(eurekahttpclientdecorator.java:149)
	at com.netflix.discovery.discoveryclient.getandupdatedelta(discoveryclient.java:1135)
	at com.netflix.discovery.discoveryclient.fetchregistry(discoveryclient.java:1016)
	at com.netflix.discovery.discoveryclient.refreshregistry(discoveryclient.java:1531)
	at com.netflix.discovery.discoveryclient$cacherefreshthread.run(discoveryclient.java:1498)
	at java.base/java.util.concurrent.executors$runnableadapter.call(executors.java:515)
	at java.base/java.util.concurrent.futuretask.run(futuretask.java:264)
	at java.base/java.util.concurrent.threadpoolexecutor.runworker(threadpoolexecutor.java:1128)
	at java.base/java.util.concurrent.threadpoolexecutor$worker.run(threadpoolexecutor.java:628)
	at java.base/java.lang.thread.run(thread.java:834)
caused by: java.net.connectexception: connection refused: connect
	at java.base/java.net.plainsocketimpl.waitforconnect(native method)
	at java.base/java.net.plainsocketimpl.socketconnect(plainsocketimpl.java:107)
	at java.base/java.net.abstractplainsocketimpl.doconnect(abstractplainsocketimpl.java:399)
	at java.base/java.net.abstractplainsocketimpl.connecttoaddress(abstractplainsocketimpl.java:242)
	at java.base/java.net.abstractplainsocketimpl.connect(abstractplainsocketimpl.java:224)
	at java.base/java.net.sockssocketimpl.connect(sockssocketimpl.java:392)
	at java.base/java.net.socket.connect(socket.java:608)
	at org.apache.http.conn.scheme.plainsocketfactory.connectsocket(plainsocketfactory.java:121)
	at org.apache.http.impl.conn.defaultclientconnectionoperator.openconnection(defaultclientconnectionoperator.java:180)
	at org.apache.http.impl.conn.abstractpoolentry.open(abstractpoolentry.java:144)
	at org.apache.http.impl.conn.abstractpooledconnadapter.open(abstractpooledconnadapter.java:134)
	at org.apache.http.impl.client.defaultrequestdirector.tryconnect(defaultrequestdirector.java:605)
	at org.apache.http.impl.client.defaultrequestdirector.execute(defaultrequestdirector.java:440)
	at org.apache.http.impl.client.abstracthttpclient.doexecute(abstracthttpclient.java:835)
	at org.apache.http.impl.client.closeablehttpclient.execute(closeablehttpclient.java:118)
	at org.apache.http.impl.client.closeablehttpclient.execute(closeablehttpclient.java:56)
	at com.sun.jersey.client.apache4.apachehttpclient4handler.handle(apachehttpclient4handler.java:173)
	... 29 more

查看yml文件配置是否有问题

server:
  port: 8081
eureka:
  instance:
    hostname: server2
    prefer-ip-address: true
    instance-id: http://127.0.0.1:${server.port}
  client:
    serviceurl:
      defaultzone: http://127.0.0.1:8080/eureka/
    fetch-registry: false
    register-with-eureka: true
spring:
  application:
    name: server2