Spring 引导管理员：java.net.UnknownHostException：3 次查询后无法解析 'SAURABH-PC.mshome.net'
Spring Boot Admin : java.net.UnknownHostException: Failed to resolve 'SAURABH-PC.mshome.net' after 3 queries
我上次用两个微服务和eureka server执行了spring boot admin。
那次它执行了，但这次它给出了这个错误并显示实例已关闭。
org.springframework.web.reactive.function.client.WebClientRequestException: Failed to resolve 'SAURABH-PC.mshome.net' after 3 queries ; nested exception is java.net.UnknownHostException: Failed to resolve 'SAURABH-PC.mshome.net' after 3 queries
at org.springframework.web.reactive.function.client.ExchangeFunctions$DefaultExchangeFunction.lambda$wrapException(ExchangeFunctions.java:141) ~[spring-webflux-5.3.19.jar:5.3.19]
Suppressed: reactor.core.publisher.FluxOnAssembly$OnAssemblyException:
Error has been observed at the following site(s):
*__checkpoint ⇢ Request to GET health [DefaultWebClient]
Original Stack Trace:
at org.springframework.web.reactive.function.client.ExchangeFunctions$DefaultExchangeFunction.lambda$wrapException(ExchangeFunctions.java:141) ~[spring-webflux-5.3.19.jar:5.3.19]
at reactor.core.publisher.MonoErrorSupplied.subscribe(MonoErrorSupplied.java:55) ~[reactor-core-3.4.17.jar:3.4.17]
at reactor.core.publisher.Mono.subscribe(Mono.java:4400) ~[reactor-core-3.4.17.jar:3.4.17]
at reactor.core.publisher.FluxOnErrorResume$ResumeSubscriber.onError(FluxOnErrorResume.java:103) ~[reactor-core-3.4.17.jar:3.4.17]
at reactor.core.publisher.FluxPeek$PeekSubscriber.onError(FluxPeek.java:222) ~[reactor-core-3.4.17.jar:3.4.17]
at reactor.core.publisher.FluxPeek$PeekSubscriber.onError(FluxPeek.java:222) ~[reactor-core-3.4.17.jar:3.4.17]
at reactor.core.publisher.FluxPeek$PeekSubscriber.onError(FluxPeek.java:222) ~[reactor-core-3.4.17.jar:3.4.17]
at reactor.core.publisher.MonoNext$NextSubscriber.onError(MonoNext.java:93) ~[reactor-core-3.4.17.jar:3.4.17]
at reactor.core.publisher.MonoFlatMapMany$FlatMapManyMain.onError(MonoFlatMapMany.java:204) ~[reactor-core-3.4.17.jar:3.4.17]
at reactor.core.publisher.SerializedSubscriber.onError(SerializedSubscriber.java:124) ~[reactor-core-3.4.17.jar:3.4.17]
at reactor.core.publisher.FluxRetryWhen$RetryWhenMainSubscriber.whenError(FluxRetryWhen.java:225) ~[reactor-core-3.4.17.jar:3.4.17]
at reactor.core.publisher.FluxRetryWhen$RetryWhenOtherSubscriber.onError(FluxRetryWhen.java:274) ~[reactor-core-3.4.17.jar:3.4.17]
at reactor.core.publisher.FluxConcatMap$ConcatMapImmediate.drain(FluxConcatMap.java:415) ~[reactor-core-3.4.17.jar:3.4.17]
at reactor.core.publisher.FluxConcatMap$ConcatMapImmediate.onNext(FluxConcatMap.java:251) ~[reactor-core-3.4.17.jar:3.4.17]
at reactor.core.publisher.EmitterProcessor.drain(EmitterProcessor.java:491) ~[reactor-core-3.4.17.jar:3.4.17]
at reactor.core.publisher.EmitterProcessor.tryEmitNext(EmitterProcessor.java:299) ~[reactor-core-3.4.17.jar:3.4.17]
at reactor.core.publisher.SinkManySerialized.tryEmitNext(SinkManySerialized.java:100) ~[reactor-core-3.4.17.jar:3.4.17]
at reactor.core.publisher.InternalManySink.emitNext(InternalManySink.java:27) ~[reactor-core-3.4.17.jar:3.4.17]
at reactor.core.publisher.FluxRetryWhen$RetryWhenMainSubscriber.onError(FluxRetryWhen.java:190) ~[reactor-core-3.4.17.jar:3.4.17]
at reactor.core.publisher.MonoCreate$DefaultMonoSink.error(MonoCreate.java:201) ~[reactor-core-3.4.17.jar:3.4.17]
at reactor.netty.http.client.HttpClientConnect$MonoHttpConnect$ClientTransportSubscriber.onError(HttpClientConnect.java:307) ~[reactor-netty-http-1.0.18.jar:1.0.18]
at reactor.core.publisher.MonoCreate$DefaultMonoSink.error(MonoCreate.java:201) ~[reactor-core-3.4.17.jar:3.4.17]
at reactor.netty.resources.DefaultPooledConnectionProvider$DisposableAcquire.onError(DefaultPooledConnectionProvider.java:158) ~[reactor-netty-core-1.0.18.jar:1.0.18]
at reactor.core.publisher.FluxContextWrite$ContextWriteSubscriber.onError(FluxContextWrite.java:121) ~[reactor-core-3.4.17.jar:3.4.17]
at reactor.netty.internal.shaded.reactor.pool.AbstractPool$Borrower.fail(AbstractPool.java:477) ~[reactor-netty-core-1.0.18.jar:1.0.18]
at reactor.netty.internal.shaded.reactor.pool.SimpleDequePool.lambda$drainLoop(SimpleDequePool.java:431) ~[reactor-netty-core-1.0.18.jar:1.0.18]
at reactor.core.publisher.FluxDoOnEach$DoOnEachSubscriber.onError(FluxDoOnEach.java:186) ~[reactor-core-3.4.17.jar:3.4.17]
at reactor.core.publisher.MonoCreate$DefaultMonoSink.error(MonoCreate.java:201) ~[reactor-core-3.4.17.jar:3.4.17]
at reactor.netty.resources.DefaultPooledConnectionProvider$PooledConnectionAllocator$PooledConnectionInitializer.onError(DefaultPooledConnectionProvider.java:542) ~[reactor-netty-core-1.0.18.jar:1.0.18]
at reactor.core.publisher.MonoFlatMap$FlatMapMain.secondError(MonoFlatMap.java:192) ~[reactor-core-3.4.17.jar:3.4.17]
at reactor.core.publisher.MonoFlatMap$FlatMapInner.onError(MonoFlatMap.java:259) ~[reactor-core-3.4.17.jar:3.4.17]
at reactor.core.publisher.FluxOnErrorResume$ResumeSubscriber.onError(FluxOnErrorResume.java:106) ~[reactor-core-3.4.17.jar:3.4.17]
at reactor.core.publisher.Operators.error(Operators.java:198) ~[reactor-core-3.4.17.jar:3.4.17]
at reactor.core.publisher.MonoError.subscribe(MonoError.java:53) ~[reactor-core-3.4.17.jar:3.4.17]
at reactor.core.publisher.Mono.subscribe(Mono.java:4400) ~[reactor-core-3.4.17.jar:3.4.17]
at reactor.core.publisher.FluxOnErrorResume$ResumeSubscriber.onError(FluxOnErrorResume.java:103) ~[reactor-core-3.4.17.jar:3.4.17]
at reactor.netty.transport.TransportConnector$MonoChannelPromise.tryFailure(TransportConnector.java:534) ~[reactor-netty-core-1.0.18.jar:1.0.18]
at reactor.netty.transport.TransportConnector.lambda$doResolveAndConnect(TransportConnector.java:341) ~[reactor-netty-core-1.0.18.jar:1.0.18]
at io.netty.util.concurrent.DefaultPromise.notifyListener0(DefaultPromise.java:578) ~[netty-common-4.1.76.Final.jar:4.1.76.Final]
at io.netty.util.concurrent.DefaultPromise.notifyListenersNow(DefaultPromise.java:552) ~[netty-common-4.1.76.Final.jar:4.1.76.Final]
at io.netty.util.concurrent.DefaultPromise.notifyListeners(DefaultPromise.java:491) ~[netty-common-4.1.76.Final.jar:4.1.76.Final]
at io.netty.util.concurrent.DefaultPromise.setValue0(DefaultPromise.java:616) ~[netty-common-4.1.76.Final.jar:4.1.76.Final]
at io.netty.util.concurrent.DefaultPromise.setFailure0(DefaultPromise.java:609) ~[netty-common-4.1.76.Final.jar:4.1.76.Final]
at io.netty.util.concurrent.DefaultPromise.setFailure(DefaultPromise.java:109) ~[netty-common-4.1.76.Final.jar:4.1.76.Final]
at io.netty.resolver.InetSocketAddressResolver.operationComplete(InetSocketAddressResolver.java:86) ~[netty-resolver-4.1.76.Final.jar:4.1.76.Final]
at io.netty.util.concurrent.DefaultPromise.notifyListener0(DefaultPromise.java:578) ~[netty-common-4.1.76.Final.jar:4.1.76.Final]
at io.netty.util.concurrent.DefaultPromise.notifyListeners0(DefaultPromise.java:571) ~[netty-common-4.1.76.Final.jar:4.1.76.Final]
at io.netty.util.concurrent.DefaultPromise.notifyListenersNow(DefaultPromise.java:550) ~[netty-common-4.1.76.Final.jar:4.1.76.Final]
at io.netty.util.concurrent.DefaultPromise.notifyListeners(DefaultPromise.java:491) ~[netty-common-4.1.76.Final.jar:4.1.76.Final]
at io.netty.util.concurrent.DefaultPromise.setValue0(DefaultPromise.java:616) ~[netty-common-4.1.76.Final.jar:4.1.76.Final]
at io.netty.util.concurrent.DefaultPromise.setFailure0(DefaultPromise.java:609) ~[netty-common-4.1.76.Final.jar:4.1.76.Final]
at io.netty.util.concurrent.DefaultPromise.tryFailure(DefaultPromise.java:117) ~[netty-common-4.1.76.Final.jar:4.1.76.Final]
at io.netty.resolver.dns.DnsResolveContext.finishResolve(DnsResolveContext.java:1055) ~[netty-resolver-dns-4.1.76.Final.jar:4.1.76.Final]
at io.netty.resolver.dns.DnsResolveContext.tryToFinishResolve(DnsResolveContext.java:1000) ~[netty-resolver-dns-4.1.76.Final.jar:4.1.76.Final]
at io.netty.resolver.dns.DnsResolveContext.query(DnsResolveContext.java:418) ~[netty-resolver-dns-4.1.76.Final.jar:4.1.76.Final]
at io.netty.resolver.dns.DnsResolveContext.onResponse(DnsResolveContext.java:629) ~[netty-resolver-dns-4.1.76.Final.jar:4.1.76.Final]
at io.netty.resolver.dns.DnsResolveContext.access0(DnsResolveContext.java:66) ~[netty-resolver-dns-4.1.76.Final.jar:4.1.76.Final]
at io.netty.resolver.dns.DnsResolveContext.operationComplete(DnsResolveContext.java:462) ~[netty-resolver-dns-4.1.76.Final.jar:4.1.76.Final]
at io.netty.util.concurrent.DefaultPromise.notifyListener0(DefaultPromise.java:578) ~[netty-common-4.1.76.Final.jar:4.1.76.Final]
at io.netty.util.concurrent.DefaultPromise.notifyListeners0(DefaultPromise.java:571) ~[netty-common-4.1.76.Final.jar:4.1.76.Final]
at io.netty.util.concurrent.DefaultPromise.notifyListenersNow(DefaultPromise.java:550) ~[netty-common-4.1.76.Final.jar:4.1.76.Final]
at io.netty.util.concurrent.DefaultPromise.notifyListeners(DefaultPromise.java:491) ~[netty-common-4.1.76.Final.jar:4.1.76.Final]
at io.netty.util.concurrent.DefaultPromise.setValue0(DefaultPromise.java:616) ~[netty-common-4.1.76.Final.jar:4.1.76.Final]
at io.netty.util.concurrent.DefaultPromise.setSuccess0(DefaultPromise.java:605) ~[netty-common-4.1.76.Final.jar:4.1.76.Final]
at io.netty.util.concurrent.DefaultPromise.trySuccess(DefaultPromise.java:104) ~[netty-common-4.1.76.Final.jar:4.1.76.Final]
at io.netty.resolver.dns.DnsQueryContext.trySuccess(DnsQueryContext.java:216) ~[netty-resolver-dns-4.1.76.Final.jar:4.1.76.Final]
at io.netty.resolver.dns.DnsQueryContext.finish(DnsQueryContext.java:208) ~[netty-resolver-dns-4.1.76.Final.jar:4.1.76.Final]
at io.netty.resolver.dns.DnsNameResolver$DnsResponseHandler.channelRead(DnsNameResolver.java:1314) ~[netty-resolver-dns-4.1.76.Final.jar:4.1.76.Final]
at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:379) ~[netty-transport-4.1.76.Final.jar:4.1.76.Final]
at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:365) ~[netty-transport-4.1.76.Final.jar:4.1.76.Final]
at io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:357) ~[netty-transport-4.1.76.Final.jar:4.1.76.Final]
at io.netty.handler.codec.MessageToMessageDecoder.channelRead(MessageToMessageDecoder.java:103) ~[netty-codec-4.1.76.Final.jar:4.1.76.Final]
at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:379) ~[netty-transport-4.1.76.Final.jar:4.1.76.Final]
at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:365) ~[netty-transport-4.1.76.Final.jar:4.1.76.Final]
at io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:357) ~[netty-transport-4.1.76.Final.jar:4.1.76.Final]
at io.netty.channel.DefaultChannelPipeline$HeadContext.channelRead(DefaultChannelPipeline.java:1410) ~[netty-transport-4.1.76.Final.jar:4.1.76.Final]
at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:379) ~[netty-transport-4.1.76.Final.jar:4.1.76.Final]
at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:365) ~[netty-transport-4.1.76.Final.jar:4.1.76.Final]
at io.netty.channel.DefaultChannelPipeline.fireChannelRead(DefaultChannelPipeline.java:919) ~[netty-transport-4.1.76.Final.jar:4.1.76.Final]
at io.netty.channel.nio.AbstractNioMessageChannel$NioMessageUnsafe.read(AbstractNioMessageChannel.java:97) ~[netty-transport-4.1.76.Final.jar:4.1.76.Final]
at io.netty.channel.nio.NioEventLoop.processSelectedKey(NioEventLoop.java:722) ~[netty-transport-4.1.76.Final.jar:4.1.76.Final]
at io.netty.channel.nio.NioEventLoop.processSelectedKeysOptimized(NioEventLoop.java:658) ~[netty-transport-4.1.76.Final.jar:4.1.76.Final]
at io.netty.channel.nio.NioEventLoop.processSelectedKeys(NioEventLoop.java:584) ~[netty-transport-4.1.76.Final.jar:4.1.76.Final]
at io.netty.channel.nio.NioEventLoop.run(NioEventLoop.java:496) ~[netty-transport-4.1.76.Final.jar:4.1.76.Final]
at io.netty.util.concurrent.SingleThreadEventExecutor.run(SingleThreadEventExecutor.java:986) ~[netty-common-4.1.76.Final.jar:4.1.76.Final]
at io.netty.util.internal.ThreadExecutorMap.run(ThreadExecutorMap.java:74) ~[netty-common-4.1.76.Final.jar:4.1.76.Final]
at io.netty.util.concurrent.FastThreadLocalRunnable.run(FastThreadLocalRunnable.java:30) ~[netty-common-4.1.76.Final.jar:4.1.76.Final]
at java.lang.Thread.run(Thread.java:748) ~[na:1.8.0_201]
Caused by: java.net.UnknownHostException: Failed to resolve 'SAURABH-PC.mshome.net' after 3 queries
at io.netty.resolver.dns.DnsResolveContext.finishResolve(DnsResolveContext.java:1047) ~[netty-resolver-dns-4.1.76.Final.jar:4.1.76.Final]
at io.netty.resolver.dns.DnsResolveContext.tryToFinishResolve(DnsResolveContext.java:1000) ~[netty-resolver-dns-4.1.76.Final.jar:4.1.76.Final]
at io.netty.resolver.dns.DnsResolveContext.query(DnsResolveContext.java:418) ~[netty-resolver-dns-4.1.76.Final.jar:4.1.76.Final]
at io.netty.resolver.dns.DnsResolveContext.onResponse(DnsResolveContext.java:629) ~[netty-resolver-dns-4.1.76.Final.jar:4.1.76.Final]
at io.netty.resolver.dns.DnsResolveContext.access0(DnsResolveContext.java:66) ~[netty-resolver-dns-4.1.76.Final.jar:4.1.76.Final]
at io.netty.resolver.dns.DnsResolveContext.operationComplete(DnsResolveContext.java:462) ~[netty-resolver-dns-4.1.76.Final.jar:4.1.76.Final]
at io.netty.util.concurrent.DefaultPromise.notifyListener0(DefaultPromise.java:578) ~[netty-common-4.1.76.Final.jar:4.1.76.Final]
at io.netty.util.concurrent.DefaultPromise.notifyListeners0(DefaultPromise.java:571) ~[netty-common-4.1.76.Final.jar:4.1.76.Final]
at io.netty.util.concurrent.DefaultPromise.notifyListenersNow(DefaultPromise.java:550) ~[netty-common-4.1.76.Final.jar:4.1.76.Final]
at io.netty.util.concurrent.DefaultPromise.notifyListeners(DefaultPromise.java:491) ~[netty-common-4.1.76.Final.jar:4.1.76.Final]
at io.netty.util.concurrent.DefaultPromise.setValue0(DefaultPromise.java:616) ~[netty-common-4.1.76.Final.jar:4.1.76.Final]
at io.netty.util.concurrent.DefaultPromise.setSuccess0(DefaultPromise.java:605) ~[netty-common-4.1.76.Final.jar:4.1.76.Final]
at io.netty.util.concurrent.DefaultPromise.trySuccess(DefaultPromise.java:104) ~[netty-common-4.1.76.Final.jar:4.1.76.Final]
at io.netty.resolver.dns.DnsQueryContext.trySuccess(DnsQueryContext.java:216) ~[netty-resolver-dns-4.1.76.Final.jar:4.1.76.Final]
at io.netty.resolver.dns.DnsQueryContext.finish(DnsQueryContext.java:208) ~[netty-resolver-dns-4.1.76.Final.jar:4.1.76.Final]
at io.netty.resolver.dns.DnsNameResolver$DnsResponseHandler.channelRead(DnsNameResolver.java:1314) ~[netty-resolver-dns-4.1.76.Final.jar:4.1.76.Final]
at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:379) ~[netty-transport-4.1.76.Final.jar:4.1.76.Final]
at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:365) ~[netty-transport-4.1.76.Final.jar:4.1.76.Final]
at io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:357) ~[netty-transport-4.1.76.Final.jar:4.1.76.Final]
at io.netty.handler.codec.MessageToMessageDecoder.channelRead(MessageToMessageDecoder.java:103) ~[netty-codec-4.1.76.Final.jar:4.1.76.Final]
at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:379) ~[netty-transport-4.1.76.Final.jar:4.1.76.Final]
at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:365) ~[netty-transport-4.1.76.Final.jar:4.1.76.Final]
at io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:357) ~[netty-transport-4.1.76.Final.jar:4.1.76.Final]
at io.netty.channel.DefaultChannelPipeline$HeadContext.channelRead(DefaultChannelPipeline.java:1410) ~[netty-transport-4.1.76.Final.jar:4.1.76.Final]
at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:379) ~[netty-transport-4.1.76.Final.jar:4.1.76.Final]
at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:365) ~[netty-transport-4.1.76.Final.jar:4.1.76.Final]
at io.netty.channel.DefaultChannelPipeline.fireChannelRead(DefaultChannelPipeline.java:919) ~[netty-transport-4.1.76.Final.jar:4.1.76.Final]
at io.netty.channel.nio.AbstractNioMessageChannel$NioMessageUnsafe.read(AbstractNioMessageChannel.java:97) ~[netty-transport-4.1.76.Final.jar:4.1.76.Final]
at io.netty.channel.nio.NioEventLoop.processSelectedKey(NioEventLoop.java:722) ~[netty-transport-4.1.76.Final.jar:4.1.76.Final]
at io.netty.channel.nio.NioEventLoop.processSelectedKeysOptimized(NioEventLoop.java:658) ~[netty-transport-4.1.76.Final.jar:4.1.76.Final]
at io.netty.channel.nio.NioEventLoop.processSelectedKeys(NioEventLoop.java:584) ~[netty-transport-4.1.76.Final.jar:4.1.76.Final]
at io.netty.channel.nio.NioEventLoop.run(NioEventLoop.java:496) ~[netty-transport-4.1.76.Final.jar:4.1.76.Final]
at io.netty.util.concurrent.SingleThreadEventExecutor.run(SingleThreadEventExecutor.java:986) ~[netty-common-4.1.76.Final.jar:4.1.76.Final]
at io.netty.util.internal.ThreadExecutorMap.run(ThreadExecutorMap.java:74) ~[netty-common-4.1.76.Final.jar:4.1.76.Final]
at io.netty.util.concurrent.FastThreadLocalRunnable.run(FastThreadLocalRunnable.java:30) ~[netty-common-4.1.76.Final.jar:4.1.76.Final]
at java.lang.Thread.run(Thread.java:748) ~[na:1.8.0_201]
在创建 WebClient Bean 时使用 DefaultAddressResolverGroup.INSTANCE 作为解析器。这是 Netty 的默认解析器的替代方案。
来自 Netty documentation 的解释：
HttpClient默认使用Netty的域名查找机制，异步解析域名。这是 JVM 的 built-in 阻塞解析器的替代方案。
有时，您可能想切换到 JVM built-in 解析器。
经过多次尝试，我终于找到了这个解决方案
spring.boot.admin.client.instance.management-base-url= http://localhost:8081
需要在每个 spring 引导管理客户端属性文件中添加以上 属性
注意：添加该客户端的端口号
我上次用两个微服务和eureka server执行了spring boot admin。 那次它执行了，但这次它给出了这个错误并显示实例已关闭。
org.springframework.web.reactive.function.client.WebClientRequestException: Failed to resolve 'SAURABH-PC.mshome.net' after 3 queries ; nested exception is java.net.UnknownHostException: Failed to resolve 'SAURABH-PC.mshome.net' after 3 queries
at org.springframework.web.reactive.function.client.ExchangeFunctions$DefaultExchangeFunction.lambda$wrapException(ExchangeFunctions.java:141) ~[spring-webflux-5.3.19.jar:5.3.19]
Suppressed: reactor.core.publisher.FluxOnAssembly$OnAssemblyException:
Error has been observed at the following site(s):
*__checkpoint ⇢ Request to GET health [DefaultWebClient]
Original Stack Trace:
at org.springframework.web.reactive.function.client.ExchangeFunctions$DefaultExchangeFunction.lambda$wrapException(ExchangeFunctions.java:141) ~[spring-webflux-5.3.19.jar:5.3.19]
at reactor.core.publisher.MonoErrorSupplied.subscribe(MonoErrorSupplied.java:55) ~[reactor-core-3.4.17.jar:3.4.17]
at reactor.core.publisher.Mono.subscribe(Mono.java:4400) ~[reactor-core-3.4.17.jar:3.4.17]
at reactor.core.publisher.FluxOnErrorResume$ResumeSubscriber.onError(FluxOnErrorResume.java:103) ~[reactor-core-3.4.17.jar:3.4.17]
at reactor.core.publisher.FluxPeek$PeekSubscriber.onError(FluxPeek.java:222) ~[reactor-core-3.4.17.jar:3.4.17]
at reactor.core.publisher.FluxPeek$PeekSubscriber.onError(FluxPeek.java:222) ~[reactor-core-3.4.17.jar:3.4.17]
at reactor.core.publisher.FluxPeek$PeekSubscriber.onError(FluxPeek.java:222) ~[reactor-core-3.4.17.jar:3.4.17]
at reactor.core.publisher.MonoNext$NextSubscriber.onError(MonoNext.java:93) ~[reactor-core-3.4.17.jar:3.4.17]
at reactor.core.publisher.MonoFlatMapMany$FlatMapManyMain.onError(MonoFlatMapMany.java:204) ~[reactor-core-3.4.17.jar:3.4.17]
at reactor.core.publisher.SerializedSubscriber.onError(SerializedSubscriber.java:124) ~[reactor-core-3.4.17.jar:3.4.17]
at reactor.core.publisher.FluxRetryWhen$RetryWhenMainSubscriber.whenError(FluxRetryWhen.java:225) ~[reactor-core-3.4.17.jar:3.4.17]
at reactor.core.publisher.FluxRetryWhen$RetryWhenOtherSubscriber.onError(FluxRetryWhen.java:274) ~[reactor-core-3.4.17.jar:3.4.17]
at reactor.core.publisher.FluxConcatMap$ConcatMapImmediate.drain(FluxConcatMap.java:415) ~[reactor-core-3.4.17.jar:3.4.17]
at reactor.core.publisher.FluxConcatMap$ConcatMapImmediate.onNext(FluxConcatMap.java:251) ~[reactor-core-3.4.17.jar:3.4.17]
at reactor.core.publisher.EmitterProcessor.drain(EmitterProcessor.java:491) ~[reactor-core-3.4.17.jar:3.4.17]
at reactor.core.publisher.EmitterProcessor.tryEmitNext(EmitterProcessor.java:299) ~[reactor-core-3.4.17.jar:3.4.17]
at reactor.core.publisher.SinkManySerialized.tryEmitNext(SinkManySerialized.java:100) ~[reactor-core-3.4.17.jar:3.4.17]
at reactor.core.publisher.InternalManySink.emitNext(InternalManySink.java:27) ~[reactor-core-3.4.17.jar:3.4.17]
at reactor.core.publisher.FluxRetryWhen$RetryWhenMainSubscriber.onError(FluxRetryWhen.java:190) ~[reactor-core-3.4.17.jar:3.4.17]
at reactor.core.publisher.MonoCreate$DefaultMonoSink.error(MonoCreate.java:201) ~[reactor-core-3.4.17.jar:3.4.17]
at reactor.netty.http.client.HttpClientConnect$MonoHttpConnect$ClientTransportSubscriber.onError(HttpClientConnect.java:307) ~[reactor-netty-http-1.0.18.jar:1.0.18]
at reactor.core.publisher.MonoCreate$DefaultMonoSink.error(MonoCreate.java:201) ~[reactor-core-3.4.17.jar:3.4.17]
at reactor.netty.resources.DefaultPooledConnectionProvider$DisposableAcquire.onError(DefaultPooledConnectionProvider.java:158) ~[reactor-netty-core-1.0.18.jar:1.0.18]
at reactor.core.publisher.FluxContextWrite$ContextWriteSubscriber.onError(FluxContextWrite.java:121) ~[reactor-core-3.4.17.jar:3.4.17]
at reactor.netty.internal.shaded.reactor.pool.AbstractPool$Borrower.fail(AbstractPool.java:477) ~[reactor-netty-core-1.0.18.jar:1.0.18]
at reactor.netty.internal.shaded.reactor.pool.SimpleDequePool.lambda$drainLoop(SimpleDequePool.java:431) ~[reactor-netty-core-1.0.18.jar:1.0.18]
at reactor.core.publisher.FluxDoOnEach$DoOnEachSubscriber.onError(FluxDoOnEach.java:186) ~[reactor-core-3.4.17.jar:3.4.17]
at reactor.core.publisher.MonoCreate$DefaultMonoSink.error(MonoCreate.java:201) ~[reactor-core-3.4.17.jar:3.4.17]
at reactor.netty.resources.DefaultPooledConnectionProvider$PooledConnectionAllocator$PooledConnectionInitializer.onError(DefaultPooledConnectionProvider.java:542) ~[reactor-netty-core-1.0.18.jar:1.0.18]
at reactor.core.publisher.MonoFlatMap$FlatMapMain.secondError(MonoFlatMap.java:192) ~[reactor-core-3.4.17.jar:3.4.17]
at reactor.core.publisher.MonoFlatMap$FlatMapInner.onError(MonoFlatMap.java:259) ~[reactor-core-3.4.17.jar:3.4.17]
at reactor.core.publisher.FluxOnErrorResume$ResumeSubscriber.onError(FluxOnErrorResume.java:106) ~[reactor-core-3.4.17.jar:3.4.17]
at reactor.core.publisher.Operators.error(Operators.java:198) ~[reactor-core-3.4.17.jar:3.4.17]
at reactor.core.publisher.MonoError.subscribe(MonoError.java:53) ~[reactor-core-3.4.17.jar:3.4.17]
at reactor.core.publisher.Mono.subscribe(Mono.java:4400) ~[reactor-core-3.4.17.jar:3.4.17]
at reactor.core.publisher.FluxOnErrorResume$ResumeSubscriber.onError(FluxOnErrorResume.java:103) ~[reactor-core-3.4.17.jar:3.4.17]
at reactor.netty.transport.TransportConnector$MonoChannelPromise.tryFailure(TransportConnector.java:534) ~[reactor-netty-core-1.0.18.jar:1.0.18]
at reactor.netty.transport.TransportConnector.lambda$doResolveAndConnect(TransportConnector.java:341) ~[reactor-netty-core-1.0.18.jar:1.0.18]
at io.netty.util.concurrent.DefaultPromise.notifyListener0(DefaultPromise.java:578) ~[netty-common-4.1.76.Final.jar:4.1.76.Final]
at io.netty.util.concurrent.DefaultPromise.notifyListenersNow(DefaultPromise.java:552) ~[netty-common-4.1.76.Final.jar:4.1.76.Final]
at io.netty.util.concurrent.DefaultPromise.notifyListeners(DefaultPromise.java:491) ~[netty-common-4.1.76.Final.jar:4.1.76.Final]
at io.netty.util.concurrent.DefaultPromise.setValue0(DefaultPromise.java:616) ~[netty-common-4.1.76.Final.jar:4.1.76.Final]
at io.netty.util.concurrent.DefaultPromise.setFailure0(DefaultPromise.java:609) ~[netty-common-4.1.76.Final.jar:4.1.76.Final]
at io.netty.util.concurrent.DefaultPromise.setFailure(DefaultPromise.java:109) ~[netty-common-4.1.76.Final.jar:4.1.76.Final]
at io.netty.resolver.InetSocketAddressResolver.operationComplete(InetSocketAddressResolver.java:86) ~[netty-resolver-4.1.76.Final.jar:4.1.76.Final]
at io.netty.util.concurrent.DefaultPromise.notifyListener0(DefaultPromise.java:578) ~[netty-common-4.1.76.Final.jar:4.1.76.Final]
at io.netty.util.concurrent.DefaultPromise.notifyListeners0(DefaultPromise.java:571) ~[netty-common-4.1.76.Final.jar:4.1.76.Final]
at io.netty.util.concurrent.DefaultPromise.notifyListenersNow(DefaultPromise.java:550) ~[netty-common-4.1.76.Final.jar:4.1.76.Final]
at io.netty.util.concurrent.DefaultPromise.notifyListeners(DefaultPromise.java:491) ~[netty-common-4.1.76.Final.jar:4.1.76.Final]
at io.netty.util.concurrent.DefaultPromise.setValue0(DefaultPromise.java:616) ~[netty-common-4.1.76.Final.jar:4.1.76.Final]
at io.netty.util.concurrent.DefaultPromise.setFailure0(DefaultPromise.java:609) ~[netty-common-4.1.76.Final.jar:4.1.76.Final]
at io.netty.util.concurrent.DefaultPromise.tryFailure(DefaultPromise.java:117) ~[netty-common-4.1.76.Final.jar:4.1.76.Final]
at io.netty.resolver.dns.DnsResolveContext.finishResolve(DnsResolveContext.java:1055) ~[netty-resolver-dns-4.1.76.Final.jar:4.1.76.Final]
at io.netty.resolver.dns.DnsResolveContext.tryToFinishResolve(DnsResolveContext.java:1000) ~[netty-resolver-dns-4.1.76.Final.jar:4.1.76.Final]
at io.netty.resolver.dns.DnsResolveContext.query(DnsResolveContext.java:418) ~[netty-resolver-dns-4.1.76.Final.jar:4.1.76.Final]
at io.netty.resolver.dns.DnsResolveContext.onResponse(DnsResolveContext.java:629) ~[netty-resolver-dns-4.1.76.Final.jar:4.1.76.Final]
at io.netty.resolver.dns.DnsResolveContext.access0(DnsResolveContext.java:66) ~[netty-resolver-dns-4.1.76.Final.jar:4.1.76.Final]
at io.netty.resolver.dns.DnsResolveContext.operationComplete(DnsResolveContext.java:462) ~[netty-resolver-dns-4.1.76.Final.jar:4.1.76.Final]
at io.netty.util.concurrent.DefaultPromise.notifyListener0(DefaultPromise.java:578) ~[netty-common-4.1.76.Final.jar:4.1.76.Final]
at io.netty.util.concurrent.DefaultPromise.notifyListeners0(DefaultPromise.java:571) ~[netty-common-4.1.76.Final.jar:4.1.76.Final]
at io.netty.util.concurrent.DefaultPromise.notifyListenersNow(DefaultPromise.java:550) ~[netty-common-4.1.76.Final.jar:4.1.76.Final]
at io.netty.util.concurrent.DefaultPromise.notifyListeners(DefaultPromise.java:491) ~[netty-common-4.1.76.Final.jar:4.1.76.Final]
at io.netty.util.concurrent.DefaultPromise.setValue0(DefaultPromise.java:616) ~[netty-common-4.1.76.Final.jar:4.1.76.Final]
at io.netty.util.concurrent.DefaultPromise.setSuccess0(DefaultPromise.java:605) ~[netty-common-4.1.76.Final.jar:4.1.76.Final]
at io.netty.util.concurrent.DefaultPromise.trySuccess(DefaultPromise.java:104) ~[netty-common-4.1.76.Final.jar:4.1.76.Final]
at io.netty.resolver.dns.DnsQueryContext.trySuccess(DnsQueryContext.java:216) ~[netty-resolver-dns-4.1.76.Final.jar:4.1.76.Final]
at io.netty.resolver.dns.DnsQueryContext.finish(DnsQueryContext.java:208) ~[netty-resolver-dns-4.1.76.Final.jar:4.1.76.Final]
at io.netty.resolver.dns.DnsNameResolver$DnsResponseHandler.channelRead(DnsNameResolver.java:1314) ~[netty-resolver-dns-4.1.76.Final.jar:4.1.76.Final]
at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:379) ~[netty-transport-4.1.76.Final.jar:4.1.76.Final]
at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:365) ~[netty-transport-4.1.76.Final.jar:4.1.76.Final]
at io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:357) ~[netty-transport-4.1.76.Final.jar:4.1.76.Final]
at io.netty.handler.codec.MessageToMessageDecoder.channelRead(MessageToMessageDecoder.java:103) ~[netty-codec-4.1.76.Final.jar:4.1.76.Final]
at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:379) ~[netty-transport-4.1.76.Final.jar:4.1.76.Final]
at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:365) ~[netty-transport-4.1.76.Final.jar:4.1.76.Final]
at io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:357) ~[netty-transport-4.1.76.Final.jar:4.1.76.Final]
at io.netty.channel.DefaultChannelPipeline$HeadContext.channelRead(DefaultChannelPipeline.java:1410) ~[netty-transport-4.1.76.Final.jar:4.1.76.Final]
at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:379) ~[netty-transport-4.1.76.Final.jar:4.1.76.Final]
at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:365) ~[netty-transport-4.1.76.Final.jar:4.1.76.Final]
at io.netty.channel.DefaultChannelPipeline.fireChannelRead(DefaultChannelPipeline.java:919) ~[netty-transport-4.1.76.Final.jar:4.1.76.Final]
at io.netty.channel.nio.AbstractNioMessageChannel$NioMessageUnsafe.read(AbstractNioMessageChannel.java:97) ~[netty-transport-4.1.76.Final.jar:4.1.76.Final]
at io.netty.channel.nio.NioEventLoop.processSelectedKey(NioEventLoop.java:722) ~[netty-transport-4.1.76.Final.jar:4.1.76.Final]
at io.netty.channel.nio.NioEventLoop.processSelectedKeysOptimized(NioEventLoop.java:658) ~[netty-transport-4.1.76.Final.jar:4.1.76.Final]
at io.netty.channel.nio.NioEventLoop.processSelectedKeys(NioEventLoop.java:584) ~[netty-transport-4.1.76.Final.jar:4.1.76.Final]
at io.netty.channel.nio.NioEventLoop.run(NioEventLoop.java:496) ~[netty-transport-4.1.76.Final.jar:4.1.76.Final]
at io.netty.util.concurrent.SingleThreadEventExecutor.run(SingleThreadEventExecutor.java:986) ~[netty-common-4.1.76.Final.jar:4.1.76.Final]
at io.netty.util.internal.ThreadExecutorMap.run(ThreadExecutorMap.java:74) ~[netty-common-4.1.76.Final.jar:4.1.76.Final]
at io.netty.util.concurrent.FastThreadLocalRunnable.run(FastThreadLocalRunnable.java:30) ~[netty-common-4.1.76.Final.jar:4.1.76.Final]
at java.lang.Thread.run(Thread.java:748) ~[na:1.8.0_201]
Caused by: java.net.UnknownHostException: Failed to resolve 'SAURABH-PC.mshome.net' after 3 queries
at io.netty.resolver.dns.DnsResolveContext.finishResolve(DnsResolveContext.java:1047) ~[netty-resolver-dns-4.1.76.Final.jar:4.1.76.Final]
at io.netty.resolver.dns.DnsResolveContext.tryToFinishResolve(DnsResolveContext.java:1000) ~[netty-resolver-dns-4.1.76.Final.jar:4.1.76.Final]
at io.netty.resolver.dns.DnsResolveContext.query(DnsResolveContext.java:418) ~[netty-resolver-dns-4.1.76.Final.jar:4.1.76.Final]
at io.netty.resolver.dns.DnsResolveContext.onResponse(DnsResolveContext.java:629) ~[netty-resolver-dns-4.1.76.Final.jar:4.1.76.Final]
at io.netty.resolver.dns.DnsResolveContext.access0(DnsResolveContext.java:66) ~[netty-resolver-dns-4.1.76.Final.jar:4.1.76.Final]
at io.netty.resolver.dns.DnsResolveContext.operationComplete(DnsResolveContext.java:462) ~[netty-resolver-dns-4.1.76.Final.jar:4.1.76.Final]
at io.netty.util.concurrent.DefaultPromise.notifyListener0(DefaultPromise.java:578) ~[netty-common-4.1.76.Final.jar:4.1.76.Final]
at io.netty.util.concurrent.DefaultPromise.notifyListeners0(DefaultPromise.java:571) ~[netty-common-4.1.76.Final.jar:4.1.76.Final]
at io.netty.util.concurrent.DefaultPromise.notifyListenersNow(DefaultPromise.java:550) ~[netty-common-4.1.76.Final.jar:4.1.76.Final]
at io.netty.util.concurrent.DefaultPromise.notifyListeners(DefaultPromise.java:491) ~[netty-common-4.1.76.Final.jar:4.1.76.Final]
at io.netty.util.concurrent.DefaultPromise.setValue0(DefaultPromise.java:616) ~[netty-common-4.1.76.Final.jar:4.1.76.Final]
at io.netty.util.concurrent.DefaultPromise.setSuccess0(DefaultPromise.java:605) ~[netty-common-4.1.76.Final.jar:4.1.76.Final]
at io.netty.util.concurrent.DefaultPromise.trySuccess(DefaultPromise.java:104) ~[netty-common-4.1.76.Final.jar:4.1.76.Final]
at io.netty.resolver.dns.DnsQueryContext.trySuccess(DnsQueryContext.java:216) ~[netty-resolver-dns-4.1.76.Final.jar:4.1.76.Final]
at io.netty.resolver.dns.DnsQueryContext.finish(DnsQueryContext.java:208) ~[netty-resolver-dns-4.1.76.Final.jar:4.1.76.Final]
at io.netty.resolver.dns.DnsNameResolver$DnsResponseHandler.channelRead(DnsNameResolver.java:1314) ~[netty-resolver-dns-4.1.76.Final.jar:4.1.76.Final]
at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:379) ~[netty-transport-4.1.76.Final.jar:4.1.76.Final]
at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:365) ~[netty-transport-4.1.76.Final.jar:4.1.76.Final]
at io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:357) ~[netty-transport-4.1.76.Final.jar:4.1.76.Final]
at io.netty.handler.codec.MessageToMessageDecoder.channelRead(MessageToMessageDecoder.java:103) ~[netty-codec-4.1.76.Final.jar:4.1.76.Final]
at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:379) ~[netty-transport-4.1.76.Final.jar:4.1.76.Final]
at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:365) ~[netty-transport-4.1.76.Final.jar:4.1.76.Final]
at io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:357) ~[netty-transport-4.1.76.Final.jar:4.1.76.Final]
at io.netty.channel.DefaultChannelPipeline$HeadContext.channelRead(DefaultChannelPipeline.java:1410) ~[netty-transport-4.1.76.Final.jar:4.1.76.Final]
at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:379) ~[netty-transport-4.1.76.Final.jar:4.1.76.Final]
at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:365) ~[netty-transport-4.1.76.Final.jar:4.1.76.Final]
at io.netty.channel.DefaultChannelPipeline.fireChannelRead(DefaultChannelPipeline.java:919) ~[netty-transport-4.1.76.Final.jar:4.1.76.Final]
at io.netty.channel.nio.AbstractNioMessageChannel$NioMessageUnsafe.read(AbstractNioMessageChannel.java:97) ~[netty-transport-4.1.76.Final.jar:4.1.76.Final]
at io.netty.channel.nio.NioEventLoop.processSelectedKey(NioEventLoop.java:722) ~[netty-transport-4.1.76.Final.jar:4.1.76.Final]
at io.netty.channel.nio.NioEventLoop.processSelectedKeysOptimized(NioEventLoop.java:658) ~[netty-transport-4.1.76.Final.jar:4.1.76.Final]
at io.netty.channel.nio.NioEventLoop.processSelectedKeys(NioEventLoop.java:584) ~[netty-transport-4.1.76.Final.jar:4.1.76.Final]
at io.netty.channel.nio.NioEventLoop.run(NioEventLoop.java:496) ~[netty-transport-4.1.76.Final.jar:4.1.76.Final]
at io.netty.util.concurrent.SingleThreadEventExecutor.run(SingleThreadEventExecutor.java:986) ~[netty-common-4.1.76.Final.jar:4.1.76.Final]
at io.netty.util.internal.ThreadExecutorMap.run(ThreadExecutorMap.java:74) ~[netty-common-4.1.76.Final.jar:4.1.76.Final]
at io.netty.util.concurrent.FastThreadLocalRunnable.run(FastThreadLocalRunnable.java:30) ~[netty-common-4.1.76.Final.jar:4.1.76.Final]
at java.lang.Thread.run(Thread.java:748) ~[na:1.8.0_201]
在创建 WebClient Bean 时使用 DefaultAddressResolverGroup.INSTANCE 作为解析器。这是 Netty 的默认解析器的替代方案。
来自 Netty documentation 的解释：
HttpClient默认使用Netty的域名查找机制，异步解析域名。这是 JVM 的 built-in 阻塞解析器的替代方案。 有时，您可能想切换到 JVM built-in 解析器。
经过多次尝试，我终于找到了这个解决方案
spring.boot.admin.client.instance.management-base-url= http://localhost:8081
需要在每个 spring 引导管理客户端属性文件中添加以上 属性
注意：添加该客户端的端口号