From time to time, the production environment will report errors:

2021-01-15 07:11:29.849 ERROR [adicon-sale,,,] 1 --- [tbeatExecutor-4] com.netflix.discovery.DiscoveryClient    : DiscoveryClient_ADICON-SALE/adicon-sale:10.244.2.143:7000 - was unable to send heartbeat!

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) ~[eureka-client-1.9.3.jar!/:1.9.3]
	at com.netflix.discovery.shared.transport.decorator.EurekaHttpClientDecorator.sendHeartBeat(EurekaHttpClientDecorator.java:89) ~[eureka-client-1.9.3.jar!/:1.9.3]
	at com.netflix.discovery.shared.transport.decorator.EurekaHttpClientDecorator$3.execute(EurekaHttpClientDecorator.java:92) ~[eureka-client-1.9.3.jar!/:1.9.3]
	at com.netflix.discovery.shared.transport.decorator.SessionedEurekaHttpClient.execute(SessionedEurekaHttpClient.java:77) ~[eureka-client-1.9.3.jar!/:1.9.3]
	at com.netflix.discovery.shared.transport.decorator.EurekaHttpClientDecorator.sendHeartBeat(EurekaHttpClientDecorator.java:89) ~[eureka-client-1.9.3.jar!/:1.9.3]
	at com.netflix.discovery.DiscoveryClient.renew(DiscoveryClient.java:846) ~[eureka-client-1.9.3.jar!/:1.9.3]
	at com.netflix.discovery.DiscoveryClient$HeartbeatThread.run(DiscoveryClient.java:1399) [eureka-client-1.9.3.jar!/:1.9.3]
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511) [na:1.8.0_202]
	at java.util.concurrent.FutureTask.run(FutureTask.java:266) [na:1.8.0_202]
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149) [na:1.8.0_202]
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624) [na:1.8.0_202]
	at java.lang.Thread.run(Thread.java:748) [na:1.8.0_202]

2021-01-15 07:11:34.853 ERROR [adicon-sale,,,] 1 --- [tbeatExecutor-4] c.n.d.s.t.d.RedirectingEurekaHttpClient  : Request execution error

javax.ws.rs.WebApplicationException: null
	at com.netflix.discovery.provider.DiscoveryJerseyProvider.readFrom(DiscoveryJerseyProvider.java:110) ~[eureka-client-1.9.3.jar!/:1.9.3]
	at com.sun.jersey.api.client.ClientResponse.getEntity(ClientResponse.java:634) ~[jersey-client-1.19.1.jar!/:1.19.1]
	at com.sun.jersey.api.client.ClientResponse.getEntity(ClientResponse.java:586) ~[jersey-client-1.19.1.jar!/:1.19.1]
	at com.netflix.discovery.shared.transport.jersey.AbstractJerseyEurekaHttpClient.sendHeartBeat(AbstractJerseyEurekaHttpClient.java:105) ~[eureka-client-1.9.3.jar!/:1.9.3]
	at com.netflix.discovery.shared.transport.decorator.EurekaHttpClientDecorator$3.execute(EurekaHttpClientDecorator.java:92) [eureka-client-1.9.3.jar!/:1.9.3]
	at com.netflix.discovery.shared.transport.decorator.MetricsCollectingEurekaHttpClient.execute(MetricsCollectingEurekaHttpClient.java:73) ~[eureka-client-1.9.3.jar!/:1.9.3]
	at com.netflix.discovery.shared.transport.decorator.EurekaHttpClientDecorator.sendHeartBeat(EurekaHttpClientDecorator.java:89) [eureka-client-1.9.3.jar!/:1.9.3]
	at com.netflix.discovery.shared.transport.decorator.EurekaHttpClientDecorator$3.execute(EurekaHttpClientDecorator.java:92) [eureka-client-1.9.3.jar!/:1.9.3]
	at com.netflix.discovery.shared.transport.decorator.RedirectingEurekaHttpClient.executeOnNewServer(RedirectingEurekaHttpClient.java:118) ~[eureka-client-1.9.3.jar!/:1.9.3]
	at com.netflix.discovery.shared.transport.decorator.RedirectingEurekaHttpClient.execute(RedirectingEurekaHttpClient.java:79) ~[eureka-client-1.9.3.jar!/:1.9.3]
	at com.netflix.discovery.shared.transport.decorator.EurekaHttpClientDecorator.sendHeartBeat(EurekaHttpClientDecorator.java:89) [eureka-client-1.9.3.jar!/:1.9.3]
	at com.netflix.discovery.shared.transport.decorator.EurekaHttpClientDecorator$3.execute(EurekaHttpClientDecorator.java:92) [eureka-client-1.9.3.jar!/:1.9.3]
	at com.netflix.discovery.shared.transport.decorator.RetryableEurekaHttpClient.execute(RetryableEurekaHttpClient.java:120) [eureka-client-1.9.3.jar!/:1.9.3]
	at com.netflix.discovery.shared.transport.decorator.EurekaHttpClientDecorator.sendHeartBeat(EurekaHttpClientDecorator.java:89) [eureka-client-1.9.3.jar!/:1.9.3]
	at com.netflix.discovery.shared.transport.decorator.EurekaHttpClientDecorator$3.execute(EurekaHttpClientDecorator.java:92) [eureka-client-1.9.3.jar!/:1.9.3]
	at com.netflix.discovery.shared.transport.decorator.SessionedEurekaHttpClient.execute(SessionedEurekaHttpClient.java:77) [eureka-client-1.9.3.jar!/:1.9.3]
	at com.netflix.discovery.shared.transport.decorator.EurekaHttpClientDecorator.sendHeartBeat(EurekaHttpClientDecorator.java:89) [eureka-client-1.9.3.jar!/:1.9.3]
	at com.netflix.discovery.DiscoveryClient.renew(DiscoveryClient.java:846) [eureka-client-1.9.3.jar!/:1.9.3]
	at com.netflix.discovery.DiscoveryClient$HeartbeatThread.run(DiscoveryClient.java:1399) [eureka-client-1.9.3.jar!/:1.9.3]
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511) [na:1.8.0_202]
	at java.util.concurrent.FutureTask.run(FutureTask.java:266) [na:1.8.0_202]
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149) [na:1.8.0_202]
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624) [na:1.8.0_202]
	at java.lang.Thread.run(Thread.java:748) [na:1.8.0_202]
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The record

server: port: 2001 spring: application: name: eureka-server eureka: client: register-with-eureka: Instance: prefer-ip-address: true instance-id: ${spring.application.name}:${server.port}Copy the code

Blog.csdn.net/qq_16855077…allfirst_rank_v2~rank_v29-1-103260026.pc_search_result_hbase_insert&utm_term=DiscoveryClient%20%20was%20unable%20to%20send% 20heartbeat!