Spring云网关不支持DiscoveryClientRouteDefinitionLocator
提问于 2020-12-21 23:53:59
当我像这样使用路由统计时，我正在使用Spring cloud gateway (它工作得很好)：
@Bean
RouteLocator routeLocator(RouteLocatorBuilder builder) {
return builder.routes()
.route((r) -> r.path("/customers/**").uri("http://localhost:8081/"))
.route((r) -> r.path("/products/**").uri("http://localhost:8082/"))
.build();
}但是，当我想在DiscoveryClientRouteDefinitionLocator中使用动态路由时，下面是我的函数：
@Bean
DiscoveryClientRouteDefinitionLocator definitionLocator(
ReactiveDiscoveryClient rdc,
DiscoveryLocatorProperties properties) {
return new DiscoveryClientRouteDefinitionLocator(rdc, properties);
}这是我的application.properties：
server.port=8888
spring.application.name=gateway-service
spring.cloud.discovery.enabled=true当我调用这个uri http://localhost:8888/PRODUCT-SERVICE/products时，我得到：
Whitelabel Error Page
This application has no configured error view, so you are seeing this as a fallback.
Tue Dec 22 00:42:19 WEST 2020
[97127699-3] There was an unexpected error (type=Internal Server Error, status=500).控制台产生的异常：
java.net.UnknownHostException: failed to resolve 'DESKTOP-B8APKA3.mshome.net' after 4 queries
at io.netty.resolver.dns.DnsResolveContext.finishResolve(DnsResolveContext.java:1013) ~[netty-resolver-dns-4.1.55.Final.jar:4.1.55.Final]
Suppressed: reactor.core.publisher.FluxOnAssembly$OnAssemblyException:
Error has been observed at the following site(s):
|_ checkpoint ⇢ org.springframework.cloud.gateway.filter.WeightCalculatorWebFilter [DefaultWebFilterChain]
|_ checkpoint ⇢ org.springframework.boot.actuate.metrics.web.reactive.server.MetricsWebFilter [DefaultWebFilterChain]
|_ checkpoint ⇢ HTTP GET "/CUSTOMER-SERVICE/customers" [ExceptionHandlingWebHandler]
|_ checkpoint ⇢ org.springframework.cloud.gateway.filter.WeightCalculatorWebFilter [DefaultWebFilterChain]
|_ checkpoint ⇢ org.springframework.boot.actuate.metrics.web.reactive.server.MetricsWebFilter [DefaultWebFilterChain]
|_ checkpoint ⇢ HTTP GET "/PRODUCT-SERVICE/products" [ExceptionHandlingWebHandler]
Stack trace:
at io.netty.resolver.dns.DnsResolveContext.finishResolve(DnsResolveContext.java:1013) ~[netty-resolver-dns-4.1.55.Final.jar:4.1.55.Final]
at io.netty.resolver.dns.DnsResolveContext.tryToFinishResolve(DnsResolveContext.java:966) ~[netty-resolver-dns-4.1.55.Final.jar:4.1.55.Final]
at io.netty.resolver.dns.DnsResolveContext.query(DnsResolveContext.java:414) ~[netty-resolver-dns-4.1.55.Final.jar:4.1.55.Final]
at io.netty.resolver.dns.DnsResolveContext.onResponse(DnsResolveContext.java:625) ~[netty-resolver-dns-4.1.55.Final.jar:4.1.55.Final]
at io.netty.resolver.dns.DnsResolveContext.access$400(DnsResolveContext.java:63) ~[netty-resolver-dns-4.1.55.Final.jar:4.1.55.Final]
at io.netty.resolver.dns.DnsResolveContext$2.operationComplete(DnsResolveContext.java:458) ~[netty-resolver-dns-4.1.55.Final.jar:4.1.55.Final]
at io.netty.util.concurrent.DefaultPromise.notifyListener0(DefaultPromise.java:578) [netty-common-4.1.55.Final.jar:4.1.55.Final]
at io.netty.util.concurrent.DefaultPromise.notifyListeners0(DefaultPromise.java:571) [netty-common-4.1.55.Final.jar:4.1.55.Final]
at io.netty.util.concurrent.DefaultPromise.notifyListenersNow(DefaultPromise.java:550) [netty-common-4.1.55.Final.jar:4.1.55.Final]
at io.netty.util.concurrent.DefaultPromise.notifyListeners(DefaultPromise.java:491) [netty-common-4.1.55.Final.jar:4.1.55.Final]
at io.netty.util.concurrent.DefaultPromise.setValue0(DefaultPromise.java:616) [netty-common-4.1.55.Final.jar:4.1.55.Final]
at io.netty.util.concurrent.DefaultPromise.setSuccess0(DefaultPromise.java:605) [netty-common-4.1.55.Final.jar:4.1.55.Final]
at io.netty.util.concurrent.DefaultPromise.trySuccess(DefaultPromise.java:104) [netty-common-4.1.55.Final.jar:4.1.55.Final]
at io.netty.resolver.dns.DnsQueryContext.trySuccess(DnsQueryContext.java:201) ~[netty-resolver-dns-4.1.55.Final.jar:4.1.55.Final]
at io.netty.resolver.dns.DnsQueryContext.finish(DnsQueryContext.java:193) ~[netty-resolver-dns-4.1.55.Final.jar:4.1.55.Final]
at io.netty.resolver.dns.DnsNameResolver$DnsResponseHandler.channelRead(DnsNameResolver.java:1230) ~[netty-resolver-dns-4.1.55.Final.jar:4.1.55.Final]
at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:379) ~[netty-transport-4.1.55.Final.jar:4.1.55.Final]
at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:365) ~[netty-transport-4.1.55.Final.jar:4.1.55.Final]
at io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:357) ~[netty-transport-4.1.55.Final.jar:4.1.55.Final]
at io.netty.handler.codec.MessageToMessageDecoder.channelRead(MessageToMessageDecoder.java:103) ~[netty-codec-4.1.55.Final.jar:4.1.55.Final]
at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:379) ~[netty-transport-4.1.55.Final.jar:4.1.55.Final]
at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:365) ~[netty-transport-4.1.55.Final.jar:4.1.55.Final]
at io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:357) ~[netty-transport-4.1.55.Final.jar:4.1.55.Final]
at io.netty.channel.DefaultChannelPipeline$HeadContext.channelRead(DefaultChannelPipeline.java:1410) ~[netty-transport-4.1.55.Final.jar:4.1.55.Final]
at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:379) ~[netty-transport-4.1.55.Final.jar:4.1.55.Final]
at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:365) ~[netty-transport-4.1.55.Final.jar:4.1.55.Final]
at io.netty.channel.DefaultChannelPipeline.fireChannelRead(DefaultChannelPipeline.java:919) ~[netty-transport-4.1.55.Final.jar:4.1.55.Final]
at io.netty.channel.nio.AbstractNioMessageChannel$NioMessageUnsafe.read(AbstractNioMessageChannel.java:93) ~[netty-transport-4.1.55.Final.jar:4.1.55.Final]
at io.netty.channel.nio.NioEventLoop.processSelectedKey(NioEventLoop.java:719) ~[netty-transport-4.1.55.Final.jar:4.1.55.Final]
at io.netty.channel.nio.NioEventLoop.processSelectedKeysOptimized(NioEventLoop.java:655) ~[netty-transport-4.1.55.Final.jar:4.1.55.Final]
at io.netty.channel.nio.NioEventLoop.processSelectedKeys(NioEventLoop.java:581) ~[netty-transport-4.1.55.Final.jar:4.1.55.Final]
at io.netty.channel.nio.NioEventLoop.run(NioEventLoop.java:493) ~[netty-transport-4.1.55.Final.jar:4.1.55.Final]
at io.netty.util.concurrent.SingleThreadEventExecutor$4.run(SingleThreadEventExecutor.java:989) ~[netty-common-4.1.55.Final.jar:4.1.55.Final]
at io.netty.util.internal.ThreadExecutorMap$2.run(ThreadExecutorMap.java:74) ~[netty-common-4.1.55.Final.jar:4.1.55.Final]
at io.netty.util.concurrent.FastThreadLocalRunnable.run(FastThreadLocalRunnable.java:30) ~[netty-common-4.1.55.Final.jar:4.1.55.Final]
at java.lang.Thread.run(Unknown Source) ~[na:1.8.0_251]
回答 4
Stack Overflow用户
回答已采纳
发布于 2020-12-29 12:20:05
这是一个DNS问题，所以我重置了网络参数，它工作了。如果重置网络仍然不起作用，则需要添加此属性：
eureka.instance.prefer-ip-address=true
在您服务的所有application.properties中，将主机的IP地址而不是容器的主机名注册到Eureka服务器。
Stack Overflow用户
发布于 2021-04-20 06:39:14
我也有同样的问题。我创建了这个bean，它解决了我的问题。
@Bean
public HttpClient httpClient() {
return HttpClient.create().resolver(DefaultAddressResolverGroup.INSTANCE);
}Stack Overflow用户
发布于 2020-12-25 14:34:32
向application.properties添加spring.cloud.discovery.enabled=true。
页面原文内容由Stack Overflow提供。腾讯云小微IT领域专用引擎提供翻译支持
原文链接：
https://stackoverflow.com/questions/65401512
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