zrlw commented on issue #15233:
URL: https://github.com/apache/dubbo/issues/15233#issuecomment-2864877424
The reason is the triple client sended header with large size meta data
(131072) to server before calling ```HpackEncoder#setMaxHeaderListSize``` for
the inboud settings (MAX_HEADER_LIST_SIZE=32768) received from the server, the
header size exceeded max allowed size (40960), so the sever responded GO_AWAY
frame.
set breakpoint at the client OUTBOUND:
```
09:33:19.333 |-DEBUG [NettyClientWorker-4-1]
H2_CLIENT:214 -| [id: 0x760dcf34, L:/192.168.122.75:64974 -
R:/192.168.122.75:50052] OUTBOUND HEADERS: streamId=3
headers=DefaultHttp2Headers[:scheme: http, :authority: 127.0.0.1:50052,
:method: POST, :path: /org.apache.dubbo.sample.tri.Greeter/greet, content-type:
application/grpc+proto, te: trailers, grpc-timeout: 300000m,
tri-consumer-appname: org.apache.dubbo.sample.tri.direct.TriDirectClientTest,
grpc-accept-encoding: gzip,snappy, timeout: 300000, large-size-meta:
aaaaaaaaaa...] padding=0 endStream=false
<== the length of 'aaaa...' is 131072
09:34:26.676 |-DEBUG [NettyClientWorker-4-1]
H2_CLIENT:214 -| [id: 0x760dcf34, L:/192.168.122.75:64974 -
R:/192.168.122.75:50052] INBOUND SETTINGS: ack=false
settings={HEADER_TABLE_SIZE=4096, MAX_CONCURRENT_STREAMS=2147483647,
INITIAL_WINDOW_SIZE=8388608, MAX_FRAME_SIZE=8388608, MAX_HEADER_LIST_SIZE=32768}
<== received setting frame which contains MAX_HEADER_LIST_SIZE=32768
```
server log:
```
09:34:26.622 |-WARN [NettyServerWorker-5-1]
.transport.TripleServerConnectionHandler: -| [DUBBO] Channel:[id:
0x6b546e25, L:/192.168.122.75:50052 - R:/192.168.122.75:64889] Error, dubbo
version: 3.3.4-SNAPSHOT, current host: 192.168.122.75, error code: 4-14. This
may be caused by , go to https://dubbo.apache.org/faq/4/14 to find
instructions.
io.netty.handler.codec.http2.Http2Exception: Header size exceeded max
allowed size (40960)
at
io.netty.handler.codec.http2.Http2Exception.connectionError(Http2Exception.java:98)
~[netty-codec-http2-4.2.0.Final.jar:4.2.0.Final]
at
io.netty.handler.codec.http2.Http2CodecUtil.headerListSizeExceeded(Http2CodecUtil.java:243)
~[netty-codec-http2-4.2.0.Final.jar:4.2.0.Final]
<== received large header
... ... ...
09:34:26.670 |-DEBUG [NettyServerWorker-5-2]
H2_SERVER:214 -| [id: 0x9e812d00, L:/192.168.122.75:50052 -
R:/192.168.122.75:64974] OUTBOUND SETTINGS: ack=false
settings={HEADER_TABLE_SIZE=4096, MAX_CONCURRENT_STREAMS=2147483647,
INITIAL_WINDOW_SIZE=8388608, MAX_FRAME_SIZE=8388608, MAX_HEADER_LIST_SIZE=32768}
<== sent setting frame to client
09:34:26.671 |-DEBUG [NettyServerWorker-5-2]
H2_SERVER:214 -| [id: 0x9e812d00, L:/192.168.122.75:50052 -
R:/192.168.122.75:64974] OUTBOUND WINDOW_UPDATE: streamId=0
windowSizeIncrement=16646146
09:34:26.672 |-DEBUG [NettyServerWorker-5-1]
H2_SERVER:214 -| [id: 0x6b546e25, L:/192.168.122.75:50052 -
R:/192.168.122.75:64889] OUTBOUND GO_AWAY: lastStreamId=0 errorCode=0 length=0
bytes=
<== sent go away frame to client
```
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