Spring Cloud Gateway AbstractErrorWebExceptionHandler

问题描述

我为所有传入的请求创建了全局路由，并使用AbstractErrorWebExceptionHandler进行了处理。

我的application.yml

spring:
  cloud:
    gateway:
      routes:
        - id: global_route
          uri: http://localhost:8082
          predicates:
            - Path=/**
          filters:
            - RewritePath=/service(?<segment>/?.*),$\{segment}
        - id: authorization_route
          uri: http://localhost:8082
          predicates:
            - Path=/key/login
          filters:
            - JWTFilter=RSA512,HS512

运行应用程序时记录：

2020-10-28 09:31:58.606 ERROR 9184 --- [ctor-http-nio-1] a.w.r.e.AbstractErrorWebExceptionHandler : [6d5d3da0]  500 Server Error for HTTP GET "/keyfd"

io.netty.channel.AbstractChannel$AnnotatedConnectException: Connection refused: no further information: localhost/127.0.0.1:8082
    Suppressed: reactor.core.publisher.FluxOnAssembly$OnAssemblyException: 
Error has been observed at the following site(s):
    |_ checkpoint ⇢ org.springframework.cloud.gateway.filter.WeightCalculatorWebFilter [DefaultWebFilterChain]
    |_ checkpoint ⇢ HTTP GET "/keyfd" [ExceptionHandlingWebHandler]
Stack trace:
Caused by: java.net.ConnectException: Connection refused: no further information
    at sun.nio.ch.socketChannelImpl.checkConnect(Native Method) ~[na:1.8.0_221]
    at sun.nio.ch.socketChannelImpl.finishConnect(SocketChannelImpl.java:717) ~[na:1.8.0_221]
    at io.netty.channel.socket.nio.NioSocketChannel.doFinishConnect(NioSocketChannel.java:330) ~[netty-transport-4.1.52.Final.jar:4.1.52.Final]
    at io.netty.channel.nio.AbstractNioChannel$AbstractNIoUnsafe.finishConnect(AbstractNioChannel.java:334) ~[netty-transport-4.1.52.Final.jar:4.1.52.Final]
    at io.netty.channel.nio.NioEventLoop.processSelectedKey(NioEventLoop.java:702) ~[netty-transport-4.1.52.Final.jar:4.1.52.Final]
    at io.netty.channel.nio.NioEventLoop.processSelectedKeysOptimized(NioEventLoop.java:650) ~[netty-transport-4.1.52.Final.jar:4.1.52.Final]
    at io.netty.channel.nio.NioEventLoop.processSelectedKeys(NioEventLoop.java:576) ~[netty-transport-4.1.52.Final.jar:4.1.52.Final]
    at io.netty.channel.nio.NioEventLoop.run(NioEventLoop.java:493) ~[netty-transport-4.1.52.Final.jar:4.1.52.Final]
    at io.netty.util.concurrent.SingleThreadEventExecutor$4.run(SingleThreadEventExecutor.java:989) ~[netty-common-4.1.52.Final.jar:4.1.52.Final]
    at io.netty.util.internal.ThreadExecutorMap$2.run(ThreadExecutorMap.java:74) ~[netty-common-4.1.52.Final.jar:4.1.52.Final]
    at io.netty.util.concurrent.FastThreadLocalRunnable.run(FastThreadLocalRunnable.java:30) ~[netty-common-4.1.52.Final.jar:4.1.52.Final]
    at java.lang.Thread.run(Thread.java:748) ~[na:1.8.0_221]

谢谢您的帮助。

解决方法

错误原因是我为Spring Cloud Gateway指定的uri与运行此应用程序的uri相同。因此，应用程序在localhost：8082上启动，而路由的uri是localhost：8082。