项目场景：

Eureka客户端配置由IP改成域名变量

问题描述：

关键异常栈：

Cannot execute request on any known server

java.lang.IllegalArgumentException: Host name may not be null

DiscoveryClient_PCENTER-XXX-SERVER/XXX-PC:pcenter-xxx-server:9090 - registration failed Cannot execute request on any known server

Cannot execute request on any known server

There was a problem with the instance info replicator


2021-04-08 11:24:07.530 [INFO ] [DiscoveryClient-CacheRefreshExecutor-0]  com.netflix.discovery.DiscoveryClient(DiscoveryClient.java:1026) - Getting all instance registry info from the eureka server
2021-04-08 11:24:07.531 [ERROR] [DiscoveryClient-CacheRefreshExecutor-0]  c.n.d.s.t.decorator.RedirectingEurekaHttpClient(RedirectingEurekaHttpClient.java:83) - Request execution error
com.sun.jersey.api.client.ClientHandlerException: java.lang.IllegalArgumentException: Host name may not be nullat 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:194)at com.netflix.discovery.shared.transport.jersey.AbstractJerseyEurekaHttpClient.getApplications(AbstractJerseyEurekaHttpClient.java:165)at com.netflix.discovery.shared.transport.decorator.EurekaHttpClientDecorator$6.execute(EurekaHttpClientDecorator.java:137)at com.netflix.discovery.shared.transport.decorator.MetricsCollectingEurekaHttpClient.execute(MetricsCollectingEurekaHttpClient.java:73)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.RedirectingEurekaHttpClient.executeOnNewServer(RedirectingEurekaHttpClient.java:118)at com.netflix.discovery.shared.transport.decorator.RedirectingEurekaHttpClient.execute(RedirectingEurekaHttpClient.java:79)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.RetryableEurekaHttpClient.execute(RetryableEurekaHttpClient.java:119)at com.netflix.discovery.shared.transport.decorator.EurekaHttpClientDecorator.getApplications(EurekaHttpClientDecorator.java:134)at com.netflix.discovery.shared.transport.decorator.EurekaHttpClientDecorator$6.execute(EurekaHttpClientDecorator.java:137)at com.netflix.discovery.shared.transport.decorator.SessionedEurekaHttpClient.execute(SessionedEurekaHttpClient.java:77)at com.netflix.discovery.shared.transport.decorator.EurekaHttpClientDecorator.getApplications(EurekaHttpClientDecorator.java:134)at com.netflix.discovery.DiscoveryClient.getAndStoreFullRegistry(DiscoveryClient.java:1030)at com.netflix.discovery.DiscoveryClient.fetchRegistry(DiscoveryClient.java:944)at com.netflix.discovery.DiscoveryClient.refreshRegistry(DiscoveryClient.java:1468)at com.netflix.discovery.DiscoveryClient$CacheRefreshThread.run(DiscoveryClient.java:1435)at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)at java.util.concurrent.FutureTask.run(FutureTask.java:266)at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)at java.lang.Thread.run(Thread.java:748)
Caused by: java.lang.IllegalArgumentException: Host name may not be nullat org.apache.http.util.Args.containsNoBlanks(Args.java:81)at org.apache.http.HttpHost.<init>(HttpHost.java:80)at com.sun.jersey.client.apache4.ApacheHttpClient4Handler.getHost(ApacheHttpClient4Handler.java:198)at com.sun.jersey.client.apache4.ApacheHttpClient4Handler.handle(ApacheHttpClient4Handler.java:173)... 30 common frames omitted
2021-04-08 11:24:07.531 [WARN ] [DiscoveryClient-CacheRefreshExecutor-0]  c.n.d.s.t.decorator.RetryableEurekaHttpClient(RetryableEurekaHttpClient.java:129) - Request execution failure
2021-04-08 11:24:07.531 [ERROR] [DiscoveryClient-CacheRefreshExecutor-0]  com.netflix.discovery.DiscoveryClient(DiscoveryClient.java:951) - DiscoveryClient_PCENTER-ESB-SERVER/ZEQIWK-PC:pcenter-esb-server:9090 - was unable to refresh its cache! status = Cannot execute request on any known server
com.netflix.discovery.shared.transport.TransportException: Cannot execute request on any known serverat com.netflix.discovery.shared.transport.decorator.RetryableEurekaHttpClient.execute(RetryableEurekaHttpClient.java:111)at com.netflix.discovery.shared.transport.decorator.EurekaHttpClientDecorator.getApplications(EurekaHttpClientDecorator.java:134)at com.netflix.discovery.shared.transport.decorator.EurekaHttpClientDecorator$6.execute(EurekaHttpClientDecorator.java:137)at com.netflix.discovery.shared.transport.decorator.SessionedEurekaHttpClient.execute(SessionedEurekaHttpClient.java:77)at com.netflix.discovery.shared.transport.decorator.EurekaHttpClientDecorator.getApplications(EurekaHttpClientDecorator.java:134)at com.netflix.discovery.DiscoveryClient.getAndStoreFullRegistry(DiscoveryClient.java:1030)at com.netflix.discovery.DiscoveryClient.fetchRegistry(DiscoveryClient.java:944)at com.netflix.discovery.DiscoveryClient.refreshRegistry(DiscoveryClient.java:1468)at com.netflix.discovery.DiscoveryClient$CacheRefreshThread.run(DiscoveryClient.java:1435)at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)at java.util.concurrent.FutureTask.run(FutureTask.java:266)at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)at java.lang.Thread.run(Thread.java:748)
2021-04-08 11:24:07.532 [ERROR] [DiscoveryClient-HeartbeatExecutor-0]  c.n.d.s.t.decorator.RedirectingEurekaHttpClient(RedirectingEurekaHttpClient.java:83) - Request execution error
com.sun.jersey.api.client.ClientHandlerException: java.lang.IllegalArgumentException: Host name may not be nullat 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.put(WebResource.java:529)at com.netflix.discovery.shared.transport.jersey.AbstractJerseyEurekaHttpClient.sendHeartBeat(AbstractJerseyEurekaHttpClient.java:102)at com.netflix.discovery.shared.transport.decorator.EurekaHttpClientDecorator$3.execute(EurekaHttpClientDecorator.java:92)at com.netflix.discovery.shared.transport.decorator.MetricsCollectingEurekaHttpClient.execute(MetricsCollectingEurekaHttpClient.java:73)at com.netflix.discovery.shared.transport.decorator.EurekaHttpClientDecorator.sendHeartBeat(EurekaHttpClientDecorator.java:89)at com.netflix.discovery.shared.transport.decorator.EurekaHttpClientDecorator$3.execute(EurekaHttpClientDecorator.java:92)at com.netflix.discovery.shared.transport.decorator.RedirectingEurekaHttpClient.executeOnNewServer(RedirectingEurekaHttpClient.java:118)at com.netflix.discovery.shared.transport.decorator.RedirectingEurekaHttpClient.execute(RedirectingEurekaHttpClient.java:79)at com.netflix.discovery.shared.transport.decorator.EurekaHttpClientDecorator.sendHeartBeat(EurekaHttpClientDecorator.java:89)at com.netflix.discovery.shared.transport.decorator.EurekaHttpClientDecorator$3.execute(EurekaHttpClientDecorator.java:92)at com.netflix.discovery.shared.transport.decorator.RetryableEurekaHttpClient.execute(RetryableEurekaHttpClient.java:119)at com.netflix.discovery.shared.transport.decorator.EurekaHttpClientDecorator.sendHeartBeat(EurekaHttpClientDecorator.java:89)at com.netflix.discovery.shared.transport.decorator.EurekaHttpClientDecorator$3.execute(EurekaHttpClientDecorator.java:92)at com.netflix.discovery.shared.transport.decorator.SessionedEurekaHttpClient.execute(SessionedEurekaHttpClient.java:77)at com.netflix.discovery.shared.transport.decorator.EurekaHttpClientDecorator.sendHeartBeat(EurekaHttpClientDecorator.java:89)at com.netflix.discovery.DiscoveryClient.renew(DiscoveryClient.java:832)at com.netflix.discovery.DiscoveryClient$HeartbeatThread.run(DiscoveryClient.java:1396)at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)at java.util.concurrent.FutureTask.run(FutureTask.java:266)at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)at java.lang.Thread.run(Thread.java:748)
Caused by: java.lang.IllegalArgumentException: Host name may not be nullat org.apache.http.util.Args.containsNoBlanks(Args.java:81)at org.apache.http.HttpHost.<init>(HttpHost.java:80)at com.sun.jersey.client.apache4.ApacheHttpClient4Handler.getHost(ApacheHttpClient4Handler.java:198)at com.sun.jersey.client.apache4.ApacheHttpClient4Handler.handle(ApacheHttpClient4Handler.java:173)... 27 common frames omitted
2021-04-08 11:24:07.532 [WARN ] [DiscoveryClient-HeartbeatExecutor-0]  c.n.d.s.t.decorator.RetryableEurekaHttpClient(RetryableEurekaHttpClient.java:129) - Request execution failure
2021-04-08 11:24:07.532 [ERROR] [DiscoveryClient-HeartbeatExecutor-0]  com.netflix.discovery.DiscoveryClient(DiscoveryClient.java:841) - DiscoveryClient_PCENTER-ESB-SERVER/ZEQIWK-PC:pcenter-esb-server:9090 - was unable to send heartbeat!
com.netflix.discovery.shared.transport.TransportException: Cannot execute request on any known serverat com.netflix.discovery.shared.transport.decorator.RetryableEurekaHttpClient.execute(RetryableEurekaHttpClient.java:111)at com.netflix.discovery.shared.transport.decorator.EurekaHttpClientDecorator.sendHeartBeat(EurekaHttpClientDecorator.java:89)at com.netflix.discovery.shared.transport.decorator.EurekaHttpClientDecorator$3.execute(EurekaHttpClientDecorator.java:92)at com.netflix.discovery.shared.transport.decorator.SessionedEurekaHttpClient.execute(SessionedEurekaHttpClient.java:77)at com.netflix.discovery.shared.transport.decorator.EurekaHttpClientDecorator.sendHeartBeat(EurekaHttpClientDecorator.java:89)at com.netflix.discovery.DiscoveryClient.renew(DiscoveryClient.java:832)at com.netflix.discovery.DiscoveryClient$HeartbeatThread.run(DiscoveryClient.java:1396)at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)at java.util.concurrent.FutureTask.run(FutureTask.java:266)at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)at java.lang.Thread.run(Thread.java:748)
2021-04-08 11:24:07.621 [INFO ] [DiscoveryClient-InstanceInfoReplicator-0]  com.netflix.discovery.DiscoveryClient(DiscoveryClient.java:812) - DiscoveryClient_PCENTER-ESB-SERVER/ZEQIWK-PC:pcenter-esb-server:9090: registering service...
2021-04-08 11:24:07.621 [ERROR] [DiscoveryClient-InstanceInfoReplicator-0]  c.n.d.s.t.decorator.RedirectingEurekaHttpClient(RedirectingEurekaHttpClient.java:83) - Request execution error
com.sun.jersey.api.client.ClientHandlerException: java.lang.IllegalArgumentException: Host name may not be nullat 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.post(WebResource.java:570)at com.netflix.discovery.shared.transport.jersey.AbstractJerseyEurekaHttpClient.register(AbstractJerseyEurekaHttpClient.java:56)at com.netflix.discovery.shared.transport.decorator.EurekaHttpClientDecorator$1.execute(EurekaHttpClientDecorator.java:59)at com.netflix.discovery.shared.transport.decorator.MetricsCollectingEurekaHttpClient.execute(MetricsCollectingEurekaHttpClient.java:73)at com.netflix.discovery.shared.transport.decorator.EurekaHttpClientDecorator.register(EurekaHttpClientDecorator.java:56)at com.netflix.discovery.shared.transport.decorator.EurekaHttpClientDecorator$1.execute(EurekaHttpClientDecorator.java:59)at com.netflix.discovery.shared.transport.decorator.RedirectingEurekaHttpClient.executeOnNewServer(RedirectingEurekaHttpClient.java:118)at com.netflix.discovery.shared.transport.decorator.RedirectingEurekaHttpClient.execute(RedirectingEurekaHttpClient.java:79)at com.netflix.discovery.shared.transport.decorator.EurekaHttpClientDecorator.register(EurekaHttpClientDecorator.java:56)at com.netflix.discovery.shared.transport.decorator.EurekaHttpClientDecorator$1.execute(EurekaHttpClientDecorator.java:59)at com.netflix.discovery.shared.transport.decorator.RetryableEurekaHttpClient.execute(RetryableEurekaHttpClient.java:119)at com.netflix.discovery.shared.transport.decorator.EurekaHttpClientDecorator.register(EurekaHttpClientDecorator.java:56)at com.netflix.discovery.shared.transport.decorator.EurekaHttpClientDecorator$1.execute(EurekaHttpClientDecorator.java:59)at com.netflix.discovery.shared.transport.decorator.SessionedEurekaHttpClient.execute(SessionedEurekaHttpClient.java:77)at com.netflix.discovery.shared.transport.decorator.EurekaHttpClientDecorator.register(EurekaHttpClientDecorator.java:56)at com.netflix.discovery.DiscoveryClient.register(DiscoveryClient.java:815)at com.netflix.discovery.InstanceInfoReplicator.run(InstanceInfoReplicator.java:104)at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)at java.util.concurrent.FutureTask.run(FutureTask.java:266)at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)at java.lang.Thread.run(Thread.java:748)
Caused by: java.lang.IllegalArgumentException: Host name may not be nullat org.apache.http.util.Args.containsNoBlanks(Args.java:81)at org.apache.http.HttpHost.<init>(HttpHost.java:80)at com.sun.jersey.client.apache4.ApacheHttpClient4Handler.getHost(ApacheHttpClient4Handler.java:198)at com.sun.jersey.client.apache4.ApacheHttpClient4Handler.handle(ApacheHttpClient4Handler.java:173)... 29 common frames omitted
2021-04-08 11:24:07.621 [WARN ] [DiscoveryClient-InstanceInfoReplicator-0]  c.n.d.s.t.decorator.RetryableEurekaHttpClient(RetryableEurekaHttpClient.java:129) - Request execution failure
2021-04-08 11:24:07.621 [WARN ] [DiscoveryClient-InstanceInfoReplicator-0]  com.netflix.discovery.DiscoveryClient(DiscoveryClient.java:817) - DiscoveryClient_PCENTER-ESB-SERVER/ZEQIWK-PC:pcenter-esb-server:9090 - registration failed Cannot execute request on any known server
com.netflix.discovery.shared.transport.TransportException: Cannot execute request on any known serverat com.netflix.discovery.shared.transport.decorator.RetryableEurekaHttpClient.execute(RetryableEurekaHttpClient.java:111)at com.netflix.discovery.shared.transport.decorator.EurekaHttpClientDecorator.register(EurekaHttpClientDecorator.java:56)at com.netflix.discovery.shared.transport.decorator.EurekaHttpClientDecorator$1.execute(EurekaHttpClientDecorator.java:59)at com.netflix.discovery.shared.transport.decorator.SessionedEurekaHttpClient.execute(SessionedEurekaHttpClient.java:77)at com.netflix.discovery.shared.transport.decorator.EurekaHttpClientDecorator.register(EurekaHttpClientDecorator.java:56)at com.netflix.discovery.DiscoveryClient.register(DiscoveryClient.java:815)at com.netflix.discovery.InstanceInfoReplicator.run(InstanceInfoReplicator.java:104)at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)at java.util.concurrent.FutureTask.run(FutureTask.java:266)at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)at java.lang.Thread.run(Thread.java:748)
2021-04-08 11:24:07.621 [WARN ] [DiscoveryClient-InstanceInfoReplicator-0]  com.netflix.discovery.InstanceInfoReplicator(InstanceInfoReplicator.java:108) - There was a problem with the instance info replicator
com.netflix.discovery.shared.transport.TransportException: Cannot execute request on any known serverat com.netflix.discovery.shared.transport.decorator.RetryableEurekaHttpClient.execute(RetryableEurekaHttpClient.java:111)at com.netflix.discovery.shared.transport.decorator.EurekaHttpClientDecorator.register(EurekaHttpClientDecorator.java:56)at com.netflix.discovery.shared.transport.decorator.EurekaHttpClientDecorator$1.execute(EurekaHttpClientDecorator.java:59)at com.netflix.discovery.shared.transport.decorator.SessionedEurekaHttpClient.execute(SessionedEurekaHttpClient.java:77)at com.netflix.discovery.shared.transport.decorator.EurekaHttpClientDecorator.register(EurekaHttpClientDecorator.java:56)at com.netflix.discovery.DiscoveryClient.register(DiscoveryClient.java:815)at com.netflix.discovery.InstanceInfoReplicator.run(InstanceInfoReplicator.java:104)at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)at java.util.concurrent.FutureTask.run(FutureTask.java:266)at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)at java.lang.Thread.run(Thread.java:748)

原因分析：

显然是服务器 host name 的问题，也就是IP改成域名造成

解决方案：

因为在eureka中java.net.URI不能区分下划线，所以切记，当使用host作为defaultZone配置时，不要以下划线来命名

eureka.client.serviceUrl.defaultZone=http://isms_paas-eureka_service:8082/eureka/

eureka.client.serviceUrl.defaultZone=http://ismspaas-eurekaservice:8082/eureka/

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Host name may not be null registration failed Cannot execute request on any known server

项目场景：

问题描述：

原因分析：

解决方案：

Host name may not be null registration failed Cannot execute request on any known server相关推荐

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