当流达到64KB后，诸如nghttp，curl之类的http2客户端将停止基于netty将更多数据发送到http2服务器

Question

对基于netty（版本：4.1.31.Final）的服务器的http2请求的结果：

nghttp -v -n -H "http-rpc-type: JsonContent" -H "content-type: application/improved-json" -d 128k.json http://127.0.0.1:12220/com.arthur.HelloService/1.0.0/sayHello
[  0.002] Connected
[  0.002] send SETTINGS frame <length=12, flags=0x00, stream_id=0>
          (niv=2)
          [SETTINGS_MAX_CONCURRENT_STREAMS(0x03):100]
          [SETTINGS_INITIAL_WINDOW_SIZE(0x04):65535]
[  0.002] send PRIORITY frame <length=5, flags=0x00, stream_id=3>
          (dep_stream_id=0, weight=201, exclusive=0)
[  0.002] send PRIORITY frame <length=5, flags=0x00, stream_id=5>
          (dep_stream_id=0, weight=101, exclusive=0)
[  0.002] send PRIORITY frame <length=5, flags=0x00, stream_id=7>
          (dep_stream_id=0, weight=1, exclusive=0)
[  0.002] send PRIORITY frame <length=5, flags=0x00, stream_id=9>
          (dep_stream_id=7, weight=1, exclusive=0)
[  0.002] send PRIORITY frame <length=5, flags=0x00, stream_id=11>
          (dep_stream_id=3, weight=1, exclusive=0)
[  0.002] send HEADERS frame <length=126, flags=0x24, stream_id=13>
          ; END_HEADERS | PRIORITY
          (padlen=0, dep_stream_id=11, weight=16, exclusive=0)
          ; Open new stream
          :method: POST
          :path: /com.alibaba.arthur.hsf.HelloService/1.0.0/sayHello
          :scheme: http
          :authority: 127.0.0.1:12220
          accept: */*
          accept-encoding: gzip, deflate
          user-agent: nghttp2/1.32.0
          content-length: 393564
          http-rpc-type: JsonContent
          content-type: application/improved-json
[  0.002] send DATA frame <length=16384, flags=0x00, stream_id=13>
[  0.002] send DATA frame <length=16384, flags=0x00, stream_id=13>
[  0.002] send DATA frame <length=16384, flags=0x00, stream_id=13>
[  0.003] send DATA frame <length=16383, flags=0x00, stream_id=13>
[ 10.006] send GOAWAY frame <length=8, flags=0x00, stream_id=0>
          (last_stream_id=0, error_code=SETTINGS_TIMEOUT(0x04), opaque_data(0)=[])
Some requests were not processed. total=1, processed=0

对nghttp服务器的请求结果如下，我们可以看到，数据完全以带有END_STREAM标志的数据帧结尾发送。正常过程具有WINDOW_UPDATE框架，因此我猜netty http2服务器存在一些问题。

[  0.007] send DATA frame <length=16384, flags=0x00, stream_id=13>
[  0.007] recv WINDOW_UPDATE frame <length=4, flags=0x00, stream_id=0>
          (window_size_increment=32767)
[  0.007] recv WINDOW_UPDATE frame <length=4, flags=0x00, stream_id=13>
          (window_size_increment=32767)
[  0.007] send DATA frame <length=16384, flags=0x00, stream_id=13>
[  0.007] send DATA frame <length=16383, flags=0x00, stream_id=13>
[  0.007] recv WINDOW_UPDATE frame <length=4, flags=0x00, stream_id=0>
          (window_size_increment=32768)
[  0.007] recv WINDOW_UPDATE frame <length=4, flags=0x00, stream_id=13>
          (window_size_increment=32768)
[  0.007] send DATA frame <length=16384, flags=0x00, stream_id=13>
[  0.007] send DATA frame <length=16384, flags=0x00, stream_id=13>
[  0.007] recv WINDOW_UPDATE frame <length=4, flags=0x00, stream_id=0>
          (window_size_increment=32767)
[  0.007] recv WINDOW_UPDATE frame <length=4, flags=0x00, stream_id=13>
          (window_size_increment=32767)
[  0.007] send DATA frame <length=16384, flags=0x00, stream_id=13>
[  0.007] send DATA frame <length=16383, flags=0x00, stream_id=13>
[  0.007] recv WINDOW_UPDATE frame <length=4, flags=0x00, stream_id=0>
          (window_size_increment=32768)
[  0.007] recv WINDOW_UPDATE frame <length=4, flags=0x00, stream_id=13>
          (window_size_increment=32768)
[  0.007] send DATA frame <length=354, flags=0x01, stream_id=13>
          ; END_STREAM