服务端使用http2协议，在压测场景下，消费端调用服务端接口出现异常，由于http2的流控导致请求失败

日志如下：
```io.netty.handler.codec.http2.Http2Exception: Flow control window exceeded for stream: 0
at io.netty.handler.codec.http2.Http2Exception.connectionError(Http2Exception.java:109)
at io.netty.handler.codec.http2.Http2Exception.streamError(Http2Exception.java:152)
at io.netty.handler.codec.http2.DefaultHttp2LocalFlowController$DefaultState.receiveFlowControlledFrame(DefaultHttp2LocalFlowController.java:429)
at io.netty.handler.codec.http2.DefaultHttp2LocalFlowController.receiveFlowControlledFrame(DefaultHttp2LocalFlowController.java:273)
at io.netty.handler.codec.http2.DefaultHttp2ConnectionDecoder$FrameReadListener.onDataRead(DefaultHttp2ConnectionDecoder.java:294)
at io.netty.handler.codec.http2.DefaultHttp2FrameReader.readDataFrame(DefaultHttp2FrameReader.java:415)
at io.netty.handler.codec.http2.DefaultHttp2FrameReader.processPayloadState(DefaultHttp2FrameReader.java:250)
at io.netty.handler.codec.http2.DefaultHttp2FrameReader.readFrame(DefaultHttp2FrameReader.java:159)
at io.netty.handler.codec.http2.DefaultHttp2ConnectionDecoder.decodeFrame(DefaultHttp2ConnectionDecoder.java:173)
at io.netty.handler.codec.http2.DecoratingHttp2ConnectionDecoder.decodeFrame(DecoratingHttp2ConnectionDecoder.java:63)
at io.netty.handler.codec.http2.Http2ConnectionHandler$FrameDecoder.decode(Http2ConnectionHandler.java:393)
at io.netty.handler.codec.http2.Http2ConnectionHandler.decode(Http2ConnectionHandler.java:453)
at io.netty.handler.codec.ByteToMessageDecoder.decodeRemovalReentryProtection(ByteToMessageDecoder.java:529)
at io.netty.handler.codec.ByteToMessageDecoder.callDecode(ByteToMessageDecoder.java:468)
at io.netty.handler.codec.ByteToMessageDecoder.channelRead(ByteToMessageDecoder.java:290)
at io.vertx.core.http.impl.VertxHttp2ConnectionHandler.channelRead(VertxHttp2ConnectionHandler.java:408)
at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:444)
at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:420)
at io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:412)
at io.netty.channel.DefaultChannelPipeline$HeadContext.channelRead(DefaultChannelPipeline.java:1410)
at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:440)
at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:420)
at io.netty.channel.DefaultChannelPipeline.fireChannelRead(DefaultChannelPipeline.java:919)
at io.netty.channel.nio.AbstractNioByteChannel$NioByteUnsafe.read(AbstractNioByteChannel.java:166)
at io.netty.channel.nio.NioEventLoop.processSelectedKey(NioEventLoop.java:788)
at io.netty.channel.nio.NioEventLoop.processSelectedKeysOptimized(NioEventLoop.java:724)
at io.netty.channel.nio.NioEventLoop.processSelectedKeys(NioEventLoop.java:650)
at io.netty.channel.nio.NioEventLoop.run(NioEventLoop.java:562)
at io.netty.util.concurrent.SingleThreadEventExecutor$4.run(SingleThreadEventExecutor.java:997)
at io.netty.util.internal.ThreadExecutorMap$2.run(ThreadExecutorMap.java:74)
at io.netty.util.concurrent.FastThreadLocalRunnable.run(FastThreadLocalRunnable.java:30)
at java.lang.Thread.run(Thread.java:748)
```
```
Invoke server failed. Operation CONSUMER rest CseDemo:cse-provider.testHttpTwo.get; server rest://10.136.96.254:22005?protocol=http2; 0-0 msg cause:InvocationException,message:InvocationException: code=490;msg=CommonExceptionData [message=Unexpected consumer error, please check logs for details];cause:StreamException,message:Attempting to return too many bytes for stream 17
```

Beginne damit, den Fehler unter HTTP/2-Last mit dem Endpoint CseDemo:cse-provider.testHttpTwo.get zu reproduzieren, und verfolge dann den Netty-Flow-Control-Stack durch VertxHttp2ConnectionHandler. Vergleiche das Verhalten von Consumer und Server rund um Stream 17 und Connection Stream 0; abgeschlossen ist die Aufgabe, wenn das Lastszenario nicht mehr fehlschlägt und die Regression durch einen wiederholbaren Test abgedeckt ist.

Vom Indexierungsmodell aus dem Issue-Text verfasst.