微服务网关配置了跨域后，允许跨越正常，但是会报这个错。

java.lang.reflect.InvocationTargetException: null at java.base/jdk.internal.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method) ~[na:na] at java.base/jdk.internal.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62) ~[na:na] at java.base/jdk.internal.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45) ~[na:na] at java.base/java.lang.reflect.Constructor.newInstance(Constructor.java:490) ~[na:na] at io.netty.resolver.dns.DnsServerAddressStreamProviders.<clinit>(DnsServerAddressStreamProviders.java:64) ~[netty-resolver-dns-4.1.73.Final.jar:4.1.73.Final] at io.netty.resolver.dns.DnsNameResolverBuilder.<init>(DnsNameResolverBuilder.java:60) ~[netty-resolver-dns-4.1.73.Final.jar:4.1.73.Final] at reactor.netty.transport.NameResolverProvider.newNameResolverGroup(NameResolverProvider.java:479) ~[reactor-netty-core-1.0.15.jar:1.0.15] at reactor.netty.tcp.TcpResources.getOrCreateDefaultResolver(TcpResources.java:315) ~[reactor-netty-core-1.0.15.jar:1.0.15] at reactor.netty.http.HttpResources.getOrCreateDefaultResolver(HttpResources.java:139) ~[reactor-netty-http-1.0.15.jar:1.0.15] at reactor.netty.http.client.HttpClientConfig.defaultAddressResolverGroup(HttpClientConfig.java:382) ~[reactor-netty-http-1.0.15.jar:1.0.15] at reactor.netty.transport.ClientTransportConfig.resolverInternal(ClientTransportConfig.java:224) ~[reactor-netty-core-1.0.15.jar:1.0.15] at reactor.netty.http.client.HttpClientConfig.resolverInternal(HttpClientConfig.java:436) ~[reactor-netty-http-1.0.15.jar:1.0.15] at reactor.netty.http.client.HttpClientConnect$MonoHttpConnect.lambda$subscribe$0(HttpClientConnect.java:264) ~[reactor-netty-http-1.0.15.jar:1.0.15] at reactor.core.publisher.MonoCreate.subscribe(MonoCreate.java:57) ~[reactor-core-3.4.14.jar:3.4.14] at reactor.core.publisher.FluxRetryWhen.subscribe(FluxRetryWhen.java:77) ~[reactor-core-3.4.14.jar:3.4.14] at reactor.core.publisher.MonoRetryWhen.subscribeOrReturn(MonoRetryWhen.java:46) ~[reactor-core-3.4.14.jar:3.4.14] at reactor.core.publisher.InternalMonoOperator.subscribe(InternalMonoOperator.java:57) ~[reactor-core-3.4.14.jar:3.4.14] at reactor.netty.http.client.HttpClientConnect$MonoHttpConnect.subscribe(HttpClientConnect.java:271) ~[reactor-netty-http-1.0.15.jar:1.0.15] at reactor.core.publisher.Flux.subscribe(Flux.java:8469) ~[reactor-core-3.4.14.jar:3.4.14] at reactor.core.publisher.MonoIgnoreThen$ThenIgnoreMain.subscribeNext(MonoIgnoreThen.java:255) ~[reactor-core-3.4.14.jar:3.4.14] at reactor.core.publisher.MonoIgnoreThen.subscribe(MonoIgnoreThen.java:51) ~[reactor-core-3.4.14.jar:3.4.14] at reactor.core.publisher.MonoDefer.subscribe(MonoDefer.java:52) ~[reactor-core-3.4.14.jar:3.4.14] at reactor.core.publisher.MonoDefer.subscribe(MonoDefer.java:52) ~[reactor-core-3.4.14.jar:3.4.14] at reactor.core.publisher.MonoDefer.subscribe(MonoDefer.java:52) ~[reactor-core-3.4.14.jar:3.4.14] at reactor.core.publisher.MonoIgnoreThen$ThenIgnoreMain.subscribeNext(MonoIgnoreThen.java:236) ~[reactor-core-3.4.14.jar:3.4.14] at reactor.core.publisher.MonoIgnoreThen$ThenIgnoreMain.onComplete(MonoIgnoreThen.java:203) ~[reactor-core-3.4.14.jar:3.4.14] at reactor.core.publisher.FluxPeek$PeekSubscriber.onComplete(FluxPeek.java:260) ~[reactor-core-3.4.14.jar:3.4.14] at reactor.core.publisher.FluxMap$MapSubscriber.onComplete(FluxMap.java:142) ~[reactor-core-3.4.14.jar:3.4.14] at reactor.core.publisher.MonoNext$NextSubscriber.onComplete(MonoNext.java:102) ~[reactor-core-3.4.14.jar:3.4.14] at reactor.core.publisher.MonoNext$NextSubscriber.onNext(MonoNext.java:83) ~[reactor-core-3.4.14.jar:3.4.14] at reactor.core.publisher.FluxDematerialize$DematerializeSubscriber.onNext(FluxDematerialize.java:98) ~[reactor-core-3.4.14.jar:3.4.14] at reactor.core.publisher.FluxDematerialize$DematerializeSubscriber.onNext(FluxDematerialize.java:44) ~[reactor-core-3.4.14.jar:3.4.14] at reactor.core.publisher.FluxFlattenIterable$FlattenIterableSubscriber.drainAsync(FluxFlattenIterable.java:421) ~[reactor-core-3.4.14.jar:3.4.14] at reactor.core.publisher.FluxFlattenIterable$FlattenIterableSubscriber.drain(FluxFlattenIterable.java:686) ~[reactor-core-3.4.14.jar:3.4.14] at reactor.core.publisher.FluxFlattenIterable$FlattenIterableSubscriber.onNext(FluxFlattenIterable.java:250) ~[reactor-core-3.4.14.jar:3.4.14] at reactor.core.publisher.FluxSwitchIfEmpty$SwitchIfEmptySubscriber.onNext(FluxSwitchIfEmpty.java:74) ~[reactor-core-3.4.14.jar:3.4.14] at reactor.core.publisher.Operators$MonoSubscriber.complete(Operators.java:1816) ~[reactor-core-3.4.14.jar:3.4.14] at reactor.core.publisher.MonoFlatMap$FlatMapInner.onNext(MonoFlatMap.java:249) ~[reactor-core-3.4.14.jar:3.4.14] at reactor.core.publisher.MonoIgnoreThen$ThenIgnoreMain.complete(MonoIgnoreThen.java:284) ~[reactor-core-3.4.14.jar:3.4.14] at reactor.core.publisher.MonoIgnoreThen$ThenIgnoreMain.onNext(MonoIgnoreThen.java:187) ~[reactor-core-3.4.14.jar:3.4.14] at reactor.core.publisher.MonoIgnoreThen$ThenIgnoreMain.subscribeNext(MonoIgnoreThen.java:232) ~[reactor-core-3.4.14.jar:3.4.14] at reactor.core.publisher.MonoIgnoreThen$ThenIgnoreMain.onComplete(MonoIgnoreThen.java:203) ~[reactor-core-3.4.14.jar:3.4.14] at reactor.core.publisher.MonoIgnoreElements$IgnoreElementsSubscriber.onComplete(MonoIgnoreElements.java:89) ~[reactor-core-3.4.14.jar:3.4.14] at reactor.core.publisher.FluxPeek$PeekSubscriber.onComplete(FluxPeek.java:260) ~[reactor-core-3.4.14.jar:3.4.14] at reactor.core.publisher.FluxDematerialize$DematerializeSubscriber.onComplete(FluxDematerialize.java:121) ~[reactor-core-3.4.14.jar:3.4.14] at reactor.core.publisher.FluxDematerialize$DematerializeSubscriber.onNext(FluxDematerialize.java:91) ~[reactor-core-3.4.14.jar:3.4.14] at reactor.core.publisher.FluxDematerialize$DematerializeSubscriber.onNext(FluxDematerialize.java:44) ~[reactor-core-3.4.14.jar:3.4.14] at reactor.core.publisher.FluxIterable$IterableSubscription.fastPath(FluxIterable.java:340) ~[reactor-core-3.4.14.jar:3.4.14] at reactor.core.publisher.FluxIterable$IterableSubscription.request(FluxIterable.java:227) ~[reactor-core-3.4.14.jar:3.4.14] at reactor.core.publisher.FluxDematerialize$DematerializeSubscriber.request(FluxDematerialize.java:127) ~[reactor-core-3.4.14.jar:3.4.14] at reactor.core.publisher.FluxPeek$PeekSubscriber.request(FluxPeek.java:138) ~[reactor-core-3.4.14.jar:3.4.14] at reactor.core.publisher.MonoIgnoreElements$IgnoreElementsSubscriber.onSubscribe(MonoIgnoreElements.java:72) ~[reactor-core-3.4.14.jar:3.4.14] at reactor.core.publisher.FluxPeek$PeekSubscriber.onSubscribe(FluxPeek.java:171) ~[reactor-core-3.4.14.jar:3.4.14] at reactor.core.publisher.FluxDematerialize$DematerializeSubscriber.onSubscribe(FluxDematerialize.java:77) ~[reactor-core-3.4.14.jar:3.4.14] at reactor.core.publisher.FluxIterable.subscribe(FluxIterable.java:165) ~[reactor-core-3.4.14.jar:3.4.14] at reactor.core.publisher.FluxIterable.subscribe(FluxIterable.java:87) ~[reactor-core-3.4.14.jar:3.4.14] at reactor.core.publisher.Mono.subscribe(Mono.java:4400) ~[reactor-core-3.4.14.jar:3.4.14] at reactor.core.publisher.MonoIgnoreThen$ThenIgnoreMain.subscribeNext(MonoIgnoreThen.java:255) ~[reactor-core-3.4.14.jar:3.4.14] at reactor.core.publisher.MonoIgnoreThen.subscribe(MonoIgnoreThen.java:51) ~[reactor-core-3.4.14.jar:3.4.14] at reactor.core.publisher.MonoFlatMap$FlatMapMain.onNext(MonoFlatMap.java:157) ~[reactor-core-3.4.14.jar:3.4.14] at reactor.core.publisher.Operators$MonoSubscriber.complete(Operators.java:1816) ~[reactor-core-3.4.14.jar:3.4.14] at reactor.core.publisher.MonoCollectList$MonoCollectListSubscriber.onComplete(MonoCollectList.java:128) ~[reactor-core-3.4.14.jar:3.4.14] at reactor.core.publisher.DrainUtils.postCompleteDrain(DrainUtils.java:132) ~[reactor-core-3.4.14.jar:3.4.14] at reactor.core.publisher.DrainUtils.postComplete(DrainUtils.java:187) ~[reactor-core-3.4.14.jar:3.4.14] at reactor.core.publisher.FluxMaterialize$MaterializeSubscriber.onComplete(FluxMaterialize.java:141) ~[reactor-core-3.4.14.jar:3.4.14] at reactor.core.publisher.FluxTake$TakeSubscriber.onComplete(FluxTake.java:153) ~[reactor-core-3.4.14.jar:3.4.14] at reactor.core.publisher.FluxTake$TakeSubscriber.onNext(FluxTake.java:133) ~[reactor-core-3.4.14.jar:3.4.14] at reactor.core.publisher.FluxOnErrorResume$ResumeSubscriber.onNext(FluxOnErrorResume.java:79) ~[reactor-core-3.4.14.jar:3.4.14] at reactor.core.publisher.SerializedSubscriber.onNext(SerializedSubscriber.java:99) ~[reactor-core-3.4.14.jar:3.4.14] at reactor.core.publisher.FluxTimeout$TimeoutMainSubscriber.onNext(FluxTimeout.java:180) ~[reactor-core-3.4.14.jar:3.4.14] at reactor.core.publisher.Operators$MonoSubscriber.complete(Operators.java:1816) ~[reactor-core-3.4.14.jar:3.4.14] at reactor.core.publisher.MonoCollectList$MonoCollectListSubscriber.onComplete(MonoCollectList.java:128) ~[reactor-core-3.4.14.jar:3.4.14] at org.springframework.cloud.commons.publisher.FluxFirstNonEmptyEmitting$FirstNonEmptyEmittingSubscriber.onComplete(FluxFirstNonEmptyEmitting.java:325) ~[spring-cloud-commons-3.1.0.jar:3.1.0] at reactor.core.publisher.FluxSubscribeOn$SubscribeOnSubscriber.onComplete(FluxSubscribeOn.java:166) ~[reactor-core-3.4.14.jar:3.4.14] at reactor.core.publisher.FluxIterable$IterableSubscription.fastPath(FluxIterable.java:362) ~[reactor-core-3.4.14.jar:3.4.14] at reactor.core.publisher.FluxIterable$IterableSubscription.request(FluxIterable.java:227) ~[reactor-core-3.4.14.jar:3.4.14] at reactor.core.publisher.FluxSubscribeOn$SubscribeOnSubscriber.requestUpstream(FluxSubscribeOn.java:131) ~[reactor-core-3.4.14.jar:3.4.14] at reactor.core.publisher.FluxSubscribeOn$SubscribeOnSubscriber.onSubscribe(FluxSubscribeOn.java:124) ~[reactor-core-3.4.14.jar:3.4.14] at reactor.core.publisher.FluxIterable.subscribe(FluxIterable.java:165) ~[reactor-core-3.4.14.jar:3.4.14] at reactor.core.publisher.FluxIterable.subscribe(FluxIterable.java:87) ~[reactor-core-3.4.14.jar:3.4.14] at reactor.core.publisher.Flux.subscribe(Flux.java:8469) ~[reactor-core-3.4.14.jar:3.4.14] at reactor.core.publisher.FluxFlatMap.trySubscribeScalarMap(FluxFlatMap.java:200) ~[reactor-core-3.4.14.jar:3.4.14] at reactor.core.publisher.MonoFlatMapMany.subscribeOrReturn(MonoFlatMapMany.java:49) ~[reactor-core-3.4.14.jar:3.4.14] at reactor.core.publisher.FluxFromMonoOperator.subscribe(FluxFromMonoOperator.java:76) ~[reactor-core-3.4.14.jar:3.4.14] at reactor.core.publisher.FluxSubscribeOn$SubscribeOnSubscriber.run(FluxSubscribeOn.java:194) ~[reactor-core-3.4.14.jar:3.4.14] at reactor.core.scheduler.WorkerTask.call(WorkerTask.java:84) ~[reactor-core-3.4.14.jar:3.4.14] at reactor.core.scheduler.WorkerTask.call(WorkerTask.java:37) ~[reactor-core-3.4.14.jar:3.4.14] at java.base/java.util.concurrent.FutureTask.run(FutureTask.java:264) ~[na:na] at java.base/java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:304) ~[na:na] at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1128) ~[na:na] at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:628) ~[na:na] at java.base/java.lang.Thread.run(Thread.java:829) ~[na:na] Caused by: java.lang.UnsatisfiedLinkError: 'io.netty.resolver.dns.macos.DnsResolver[] io.netty.resolver.dns.macos.MacOSDnsServerAddressStreamProvider.resolvers()' at io.netty.resolver.dns.macos.MacOSDnsServerAddressStreamProvider.resolvers(Native Method) ~[netty-resolver-dns-classes-macos-4.1.73.Final.jar:4.1.73.Final] at io.netty.resolver.dns.macos.MacOSDnsServerAddressStreamProvider.retrieveCurrentMappings(MacOSDnsServerAddressStreamProvider.java:127) ~[netty-resolver-dns-classes-macos-4.1.73.Final.jar:4.1.73.Final] at io.netty.resolver.dns.macos.MacOSDnsServerAddressStreamProvider.<init>(MacOSDnsServerAddressStreamProvider.java:123) ~[netty-resolver-dns-classes-macos-4.1.73.Final.jar:4.1.73.Final] ... 92 common frames omitted

解决方法：

讯享网

在网关pom引入依赖

讯享网 <dependency> <groupId>io.netty</groupId> <artifactId>netty-all</artifactId> </dependency>