The http2 response body is not coming.

[Rohsichan]

Go version

go version go1.22.6 linux/amd64

Output of go env in your module/workspace:

GO111MODULE=''
GOARCH='amd64'
GOBIN=''
GOCACHE='/root/.cache/go-build'
GOENV='/root/.config/go/env'
GOEXE=''
GOEXPERIMENT=''
GOFLAGS=''
GOHOSTARCH='amd64'
GOHOSTOS='linux'
GOINSECURE=''
GOMODCACHE='/root/go/pkg/mod'
GOOS='linux'
GOPATH='/root/go'
GOPROXY='https://proxy.golang.org,direct'
GOROOT='/usr/local/go1.22.6.linux-amd64'
GOSUMDB='sum.golang.org'
GOTMPDIR=''
GOTOOLCHAIN='auto'
GOTOOLDIR='/usr/local/go1.22.6.linux-amd64/pkg/tool/linux_amd64'
GOVCS=''
GOVERSION='go1.22.6'
GCCGO='gccgo'
GOAMD64='v1'
AR='ar'
CC='gcc'
CXX='g++'
CGO_ENABLED='1'
GOWORK=''
CGO_CFLAGS='-O2 -g'
CGO_CPPFLAGS=''
CGO_CXXFLAGS='-O2 -g'
CGO_FFLAGS='-O2 -g'
CGO_LDFLAGS='-O2 -g'
PKG_CONFIG='pkg-config'
GOGCCFLAGS='-fPIC -m64 -pthread -Wl,--no-gc-sections -fmessage-length=0 -ffile-prefix-map=/tmp/go-build85905069=/tmp/go-build -gno-record-gcc-switches'

What did you do?

client (chrome) <-- http2 --> reverse proxy <-- http1.1 --> server

I created 15 tabs in Chrome and accessed them.

What did you see happen?

After checking tcpdump, http2 is not responding. It seems that http2debug=2 is not sending data either.

What did you expect to see?

I expected all the responses to come normally.

Please let me know if you need to collect data, I will collect it as much as I can.

[gabyhelp]

Related Issues and Documentation

• x/net/http2: #33009 (closed)
• net/http, golang.org/x/net/http2 #61391 (closed)
• x/net/http2: support http2 proxy connections #26479
• net/http: bundled x/net/http2.responseWriter hangs forever #42534
• H2C Server causes Truncated Body On HTTP2 Requests with a Reverse Proxy, but only when writing a new response body. (Server Reset Stream) #42225 (closed)
• net/http/httputil: ReverseProxy fails to proxy h2c #33452 (closed)
• x/net/http2/h2c: h2c handler doesn't drain initial request body #43654 (closed)
• x/net/http2: make net/http/httputil/ DumpRequestOut working on http2 ?? #18464 (closed)
• x/net/http2: response Write on HEAD fails with "http2: request body closed due to handler exiting" #66812
• x/net/http2: Transport ignores net/http.Transport.Proxy once connected #25793

_{(Emoji vote if this was helpful or unhelpful; more detailed feedback welcome in this discussion.)}

[Rohsichan]

client <-- http2 --> reverse proxy <-- http1.1 --> server

I checked that tcp zero window occurred between proxy <-> server because data could not be sent to client.

Once it occurs, this symptom will only be resolved by restarting the browser.

[Rohsichan]

I am checking debug additionally, but if I use bundle, it will be reproduced and x/net/http2 will not be reproduced.

#42534

The issue seems to be the same.

[seankhliao]

Duplicate of #42534