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我正在尝试将我的grpc请求路由到代理而不是实际服务器以进行某些测试。我已将 JVM 属性设置为：（-Dhttps.proxyHost=localhost -Dhttps.proxyPort=8888这是我的代理服务器运行的地方 - 这实际上是一个 Hoverfly 代理服务器）。当我尝试发送请求时，这是我看到的错误：

2021-06-22 16:23:52.935 - - WARN i.g.n.s.i.n.c.DefaultChannelPipeline grpc-default-worker-ELG-1-16 - An exceptionCaught() event was fired, and it reached at the tail of the pipeline. It usually means the last handler in the pipeline did not handle the exception.
io.grpc.netty.shaded.io.netty.handler.proxy.ProxyConnectException: http, none, host.docker.internal/127.0.0.1:8888 => usvc.dev.hostname.com:443, disconnected
    at io.grpc.netty.shaded.io.netty.handler.proxy.ProxyHandler.channelInactive(ProxyHandler.java:236)
    at io.grpc.netty.shaded.io.netty.channel.AbstractChannelHandlerContext.invokeChannelInactive(AbstractChannelHandlerContext.java:245)
    at io.grpc.netty.shaded.io.netty.channel.AbstractChannelHandlerContext.invokeChannelInactive(AbstractChannelHandlerContext.java:231)
    at io.grpc.netty.shaded.io.netty.channel.AbstractChannelHandlerContext.fireChannelInactive(AbstractChannelHandlerContext.java:224)
    at io.grpc.netty.shaded.io.netty.channel.CombinedChannelDuplexHandler$DelegatingChannelHandlerContext.fireChannelInactive(CombinedChannelDuplexHandler.java:420)
    at io.grpc.netty.shaded.io.netty.handler.codec.ByteToMessageDecoder.channelInputClosed(ByteToMessageDecoder.java:390)
    at io.grpc.netty.shaded.io.netty.handler.codec.ByteToMessageDecoder.channelInactive(ByteToMessageDecoder.java:355)
    at io.grpc.netty.shaded.io.netty.handler.codec.http.HttpClientCodec$Decoder.channelInactive(HttpClientCodec.java:282)
    at io.grpc.netty.shaded.io.netty.channel.CombinedChannelDuplexHandler.channelInactive(CombinedChannelDuplexHandler.java:223)
    at io.grpc.netty.shaded.io.netty.channel.AbstractChannelHandlerContext.invokeChannelInactive(AbstractChannelHandlerContext.java:245)
    at io.grpc.netty.shaded.io.netty.channel.AbstractChannelHandlerContext.invokeChannelInactive(AbstractChannelHandlerContext.java:231)
    at io.grpc.netty.shaded.io.netty.channel.AbstractChannelHandlerContext.fireChannelInactive(AbstractChannelHandlerContext.java:224)
    at io.grpc.netty.shaded.io.netty.handler.codec.ByteToMessageDecoder.channelInputClosed(ByteToMessageDecoder.java:390)
    at io.grpc.netty.shaded.io.netty.handler.codec.ByteToMessageDecoder.channelInactive(ByteToMessageDecoder.java:355)
    at io.grpc.netty.shaded.io.netty.handler.codec.http2.Http2ConnectionHandler.channelInactive(Http2ConnectionHandler.java:427)
    at io.grpc.netty.shaded.io.grpc.netty.NettyClientHandler.channelInactive(NettyClientHandler.java:432)
    at io.grpc.netty.shaded.io.netty.channel.AbstractChannelHandlerContext.invokeChannelInactive(AbstractChannelHandlerContext.java:245)
    at io.grpc.netty.shaded.io.netty.channel.AbstractChannelHandlerContext.invokeChannelInactive(AbstractChannelHandlerContext.java:231)
    at io.grpc.netty.shaded.io.netty.channel.AbstractChannelHandlerContext.fireChannelInactive(AbstractChannelHandlerContext.java:224)
    at io.grpc.netty.shaded.io.netty.channel.DefaultChannelPipeline$HeadContext.channelInactive(DefaultChannelPipeline.java:1429)
    at io.grpc.netty.shaded.io.netty.channel.AbstractChannelHandlerContext.invokeChannelInactive(AbstractChannelHandlerContext.java:245)
    at io.grpc.netty.shaded.io.netty.channel.AbstractChannelHandlerContext.invokeChannelInactive(AbstractChannelHandlerContext.java:231)
    at io.grpc.netty.shaded.io.netty.channel.DefaultChannelPipeline.fireChannelInactive(DefaultChannelPipeline.java:947)
    at io.grpc.netty.shaded.io.netty.channel.AbstractChannel$AbstractUnsafe$8.run(AbstractChannel.java:826)
    at io.grpc.netty.shaded.io.netty.util.concurrent.AbstractEventExecutor.safeExecute(AbstractEventExecutor.java:163)
    at io.grpc.netty.shaded.io.netty.util.concurrent.SingleThreadEventExecutor.runAllTasks(SingleThreadEventExecutor.java:404)
    at io.grpc.netty.shaded.io.netty.channel.nio.NioEventLoop.run(NioEventLoop.java:474)
    at io.grpc.netty.shaded.io.netty.util.concurrent.SingleThreadEventExecutor$5.run(SingleThreadEventExecutor.java:909)
    at io.grpc.netty.shaded.io.netty.util.concurrent.FastThreadLocalRunnable.run(FastThreadLocalRunnable.java:30)
    at java.base/java.lang.Thread.run(Thread.java:834)

我不完全理解此错误消息 - 这是否意味着它无法将请求转发到代理？

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