Spring Webflux Netty - HttpProxyConnectException 503 服务不可用，但对于谁？
Spring Webflux Netty - HttpProxyConnectException 503 Service Unavailable, but for who?
目前使用最新的 Spring Boot 2.5.1 和 Webflux，我必须通过代理向第三方应用程序发出 HTTP 出站调用。
调用方式如下：我的应用程序 -> 代理 -> 第三方休息 API
接到电话后，我在日志中观察到：
io.netty.handler.proxy.HttpProxyHandler$HttpProxyConnectException:
http, none, myproxy.com/someIP:443 => third-party.com:443, status: 503
Service Unavailable
下面是完整的堆栈跟踪。
请问，谁，请问这两个哪一个不可用？ 503来自代理，还是来自第三方？
r.netty.http.client.HttpClientConnect : [id:85c9790c, L:/ip:54246 ! R:proxy.com/proxyIP:443] The connection observed an error
io.netty.handler.proxy.HttpProxyHandler$HttpProxyConnectException: http, none, proxy.com.com/proxyIP:443 => third-party.com:443, status: 503 Service Unavailable
at io.netty.handler.proxy.HttpProxyHandler.handleResponse(HttpProxyHandler.java:200) ~[netty-handler-proxy-4.1.65.Final.jar!/:4.1.65.Final]
at io.netty.handler.proxy.ProxyHandler.channelRead(ProxyHandler.java:258) ~[netty-handler-proxy-4.1.65.Final.jar!/:4.1.65.Final]
at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:379) ~[netty-transport-4.1.65.Final.jar!/:4.1.65.Final]
at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:365) ~[netty-transport-4.1.65.Final.jar!/:4.1.65.Final]
at io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:357) ~[netty-transport-4.1.65.Final.jar!/:4.1.65.Final]
at io.netty.handler.logging.LoggingHandler.channelRead(LoggingHandler.java:271) ~[netty-handler-4.1.65.Final.jar!/:4.1.65.Final]
at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:379) ~[netty-transport-4.1.65.Final.jar!/:4.1.65.Final]
at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:365) ~[netty-transport-4.1.65.Final.jar!/:4.1.65.Final]
at io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:357) ~[netty-transport-4.1.65.Final.jar!/:4.1.65.Final]
at io.netty.channel.CombinedChannelDuplexHandler$DelegatingChannelHandlerContext.fireChannelRead(CombinedChannelDuplexHandler.java:436) ~[netty-transport-4.1.65.Final.jar!/:4.1.65.Final]
at io.netty.handler.codec.ByteToMessageDecoder.fireChannelRead(ByteToMessageDecoder.java:324) ~[netty-codec-4.1.65.Final.jar!/:4.1.65.Final]
at io.netty.handler.codec.ByteToMessageDecoder.channelRead(ByteToMessageDecoder.java:296) ~[netty-codec-4.1.65.Final.jar!/:4.1.65.Final]
at io.netty.channel.CombinedChannelDuplexHandler.channelRead(CombinedChannelDuplexHandler.java:251) ~[netty-transport-4.1.65.Final.jar!/:4.1.65.Final]
at io.netty.handler.proxy.HttpProxyHandler$HttpClientCodecWrapper.channelRead(HttpProxyHandler.java:272) ~[netty-handler-proxy-4.1.65.Final.jar!/:4.1.65.Final]
at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:379) ~[netty-transport-4.1.65.Final.jar!/:4.1.65.Final]
at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:365) ~[netty-transport-4.1.65.Final.jar!/:4.1.65.Final]
at io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:357) ~[netty-transport-4.1.65.Final.jar!/:4.1.65.Final]
at io.netty.channel.DefaultChannelPipeline$HeadContext.channelRead(DefaultChannelPipeline.java:1410) ~[netty-transport-4.1.65.Final.jar!/:4.1.65.Final]
at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:379) ~[netty-transport-4.1.65.Final.jar!/:4.1.65.Final]
at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:365) ~[netty-transport-4.1.65.Final.jar!/:4.1.65.Final]
at io.netty.channel.DefaultChannelPipeline.fireChannelRead(DefaultChannelPipeline.java:919) ~[netty-transport-4.1.65.Final.jar!/:4.1.65.Final]
at io.netty.channel.epoll.AbstractEpollStreamChannel$EpollStreamUnsafe.epollInReady(AbstractEpollStreamChannel.java:795) ~[netty-transport-native-epoll-4.1.65.Final-linux-x86_64.jar!/:4.1.65.Final]
at io.netty.channel.epoll.AbstractEpollChannel$AbstractEpollUnsafe.epollRdHupReady(AbstractEpollChannel.java:480) ~[netty-transport-native-epoll-4.1.65.Final-linux-x86_64.jar!/:4.1.65.Final]
at io.netty.channel.epoll.EpollEventLoop.processReady(EpollEventLoop.java:487) ~[netty-transport-native-epoll-4.1.65.Final-linux-x86_64.jar!/:4.1.65.Final]
at io.netty.channel.epoll.EpollEventLoop.run(EpollEventLoop.java:378) ~[netty-transport-native-epoll-4.1.65.Final-linux-x86_64.jar!/:4.1.65.Final]
at io.netty.util.concurrent.SingleThreadEventExecutor.run(SingleThreadEventExecutor.java:989) ~[netty-common-4.1.65.Final.jar!/:4.1.65.Final]
at io.netty.util.internal.ThreadExecutorMap.run(ThreadExecutorMap.java:74) ~[netty-common-4.1.65.Final.jar!/:4.1.65.Final]
at io.netty.util.concurrent.FastThreadLocalRunnable.run(FastThreadLocalRunnable.java:30) ~[netty-common-4.1.65.Final.jar!/:4.1.65.Final]
at java.base/java.lang.Thread.run(Thread.java:829) ~[na:na]
检查1、本地应用、2、代理设备、3目标应用的日志后，这个错误意味着503服务不可用是目标应用。日志表明第三方应用程序有问题，而不是代理
目前使用最新的 Spring Boot 2.5.1 和 Webflux，我必须通过代理向第三方应用程序发出 HTTP 出站调用。
调用方式如下：我的应用程序 -> 代理 -> 第三方休息 API
接到电话后，我在日志中观察到：
io.netty.handler.proxy.HttpProxyHandler$HttpProxyConnectException: http, none, myproxy.com/someIP:443 => third-party.com:443, status: 503 Service Unavailable
下面是完整的堆栈跟踪。
请问，谁，请问这两个哪一个不可用？ 503来自代理，还是来自第三方？
r.netty.http.client.HttpClientConnect : [id:85c9790c, L:/ip:54246 ! R:proxy.com/proxyIP:443] The connection observed an error
io.netty.handler.proxy.HttpProxyHandler$HttpProxyConnectException: http, none, proxy.com.com/proxyIP:443 => third-party.com:443, status: 503 Service Unavailable
at io.netty.handler.proxy.HttpProxyHandler.handleResponse(HttpProxyHandler.java:200) ~[netty-handler-proxy-4.1.65.Final.jar!/:4.1.65.Final]
at io.netty.handler.proxy.ProxyHandler.channelRead(ProxyHandler.java:258) ~[netty-handler-proxy-4.1.65.Final.jar!/:4.1.65.Final]
at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:379) ~[netty-transport-4.1.65.Final.jar!/:4.1.65.Final]
at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:365) ~[netty-transport-4.1.65.Final.jar!/:4.1.65.Final]
at io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:357) ~[netty-transport-4.1.65.Final.jar!/:4.1.65.Final]
at io.netty.handler.logging.LoggingHandler.channelRead(LoggingHandler.java:271) ~[netty-handler-4.1.65.Final.jar!/:4.1.65.Final]
at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:379) ~[netty-transport-4.1.65.Final.jar!/:4.1.65.Final]
at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:365) ~[netty-transport-4.1.65.Final.jar!/:4.1.65.Final]
at io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:357) ~[netty-transport-4.1.65.Final.jar!/:4.1.65.Final]
at io.netty.channel.CombinedChannelDuplexHandler$DelegatingChannelHandlerContext.fireChannelRead(CombinedChannelDuplexHandler.java:436) ~[netty-transport-4.1.65.Final.jar!/:4.1.65.Final]
at io.netty.handler.codec.ByteToMessageDecoder.fireChannelRead(ByteToMessageDecoder.java:324) ~[netty-codec-4.1.65.Final.jar!/:4.1.65.Final]
at io.netty.handler.codec.ByteToMessageDecoder.channelRead(ByteToMessageDecoder.java:296) ~[netty-codec-4.1.65.Final.jar!/:4.1.65.Final]
at io.netty.channel.CombinedChannelDuplexHandler.channelRead(CombinedChannelDuplexHandler.java:251) ~[netty-transport-4.1.65.Final.jar!/:4.1.65.Final]
at io.netty.handler.proxy.HttpProxyHandler$HttpClientCodecWrapper.channelRead(HttpProxyHandler.java:272) ~[netty-handler-proxy-4.1.65.Final.jar!/:4.1.65.Final]
at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:379) ~[netty-transport-4.1.65.Final.jar!/:4.1.65.Final]
at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:365) ~[netty-transport-4.1.65.Final.jar!/:4.1.65.Final]
at io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:357) ~[netty-transport-4.1.65.Final.jar!/:4.1.65.Final]
at io.netty.channel.DefaultChannelPipeline$HeadContext.channelRead(DefaultChannelPipeline.java:1410) ~[netty-transport-4.1.65.Final.jar!/:4.1.65.Final]
at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:379) ~[netty-transport-4.1.65.Final.jar!/:4.1.65.Final]
at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:365) ~[netty-transport-4.1.65.Final.jar!/:4.1.65.Final]
at io.netty.channel.DefaultChannelPipeline.fireChannelRead(DefaultChannelPipeline.java:919) ~[netty-transport-4.1.65.Final.jar!/:4.1.65.Final]
at io.netty.channel.epoll.AbstractEpollStreamChannel$EpollStreamUnsafe.epollInReady(AbstractEpollStreamChannel.java:795) ~[netty-transport-native-epoll-4.1.65.Final-linux-x86_64.jar!/:4.1.65.Final]
at io.netty.channel.epoll.AbstractEpollChannel$AbstractEpollUnsafe.epollRdHupReady(AbstractEpollChannel.java:480) ~[netty-transport-native-epoll-4.1.65.Final-linux-x86_64.jar!/:4.1.65.Final]
at io.netty.channel.epoll.EpollEventLoop.processReady(EpollEventLoop.java:487) ~[netty-transport-native-epoll-4.1.65.Final-linux-x86_64.jar!/:4.1.65.Final]
at io.netty.channel.epoll.EpollEventLoop.run(EpollEventLoop.java:378) ~[netty-transport-native-epoll-4.1.65.Final-linux-x86_64.jar!/:4.1.65.Final]
at io.netty.util.concurrent.SingleThreadEventExecutor.run(SingleThreadEventExecutor.java:989) ~[netty-common-4.1.65.Final.jar!/:4.1.65.Final]
at io.netty.util.internal.ThreadExecutorMap.run(ThreadExecutorMap.java:74) ~[netty-common-4.1.65.Final.jar!/:4.1.65.Final]
at io.netty.util.concurrent.FastThreadLocalRunnable.run(FastThreadLocalRunnable.java:30) ~[netty-common-4.1.65.Final.jar!/:4.1.65.Final]
at java.base/java.lang.Thread.run(Thread.java:829) ~[na:na]
检查1、本地应用、2、代理设备、3目标应用的日志后，这个错误意味着503服务不可用是目标应用。日志表明第三方应用程序有问题，而不是代理