net/http: apparent deadlock in TestHandlerFinishSkipBigContentLengthRead #62622
Description
#!watchflakes
post <- pkg == "net/http" && test == "TestHandlerFinishSkipBigContentLengthRead" && `panic: test timed out`
What version of Go are you using (go version)?
Built from source at https://go.dev/cl/527196.
Does this issue reproduce with the latest release?
Presumably.
What operating system and processor architecture are you using (go env)?
go env Output
$ go env GO111MODULE='' GOARCH='amd64' GOBIN='' GOCACHE='/usr/local/google/home/bcmills/.cache/go-build' GOENV='/usr/local/google/home/bcmills/.config/go/env' GOEXE='' GOEXPERIMENT='' GOFLAGS='' GOHOSTARCH='amd64' GOHOSTOS='linux' GOINSECURE='' GOMODCACHE='/usr/local/google/home/bcmills/pkg/mod' GONOPROXY='' GONOSUMDB='' GOOS='linux' GOPATH='/usr/local/google/home/bcmills' GOPRIVATE='' GOPROXY='https://proxy.golang.org,direct' GOROOT='/usr/local/google/home/bcmills/go' GOSUMDB='sum.golang.org' GOTMPDIR='' GOTOOLCHAIN='local' GOTOOLDIR='/usr/local/google/home/bcmills/go/pkg/tool/linux_amd64' GOVCS='' GOVERSION='devel go1.22-965e2d4a89 Wed Sep 13 15:12:58 2023 -0400' GCCGO='/usr/bin/gccgo' GOAMD64='v1' AR='ar' CC='gcc' CXX='c++' CGO_ENABLED='1' GOMOD='/usr/local/google/home/bcmills/go/src/go.mod' 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-build613896623=/tmp/go-build -gno-record-gcc-switches'
What did you do?
~/go/src$ while go test -race net/http -count=1 ; do true; done
What did you expect to see?
Consistently passing tests.
What did you see instead?
Lots of passing tests, followed by an apparent deadlock.
panic: test timed out after 10m0s
running tests:
TestHandlerFinishSkipBigContentLengthRead (9m41s)
goroutine 15012 [running]:
testing.(*M).startAlarm.func1()
/usr/local/google/home/bcmills/go/src/testing/testing.go:2257 +0x214
created by time.goFunc
/usr/local/google/home/bcmills/go/src/time/sleep.go:177 +0x45
goroutine 1 [chan receive, 9 minutes]:
testing.(*T).Run(0xc000104d00, {0xb8fdcc, 0x29}, 0xbbf158)
/usr/local/google/home/bcmills/go/src/testing/testing.go:1647 +0x856
testing.runTests.func1(0x0?)
/usr/local/google/home/bcmills/go/src/testing/testing.go:2052 +0x86
testing.tRunner(0xc000104d00, 0xc000137aa0)
/usr/local/google/home/bcmills/go/src/testing/testing.go:1593 +0x21b
testing.runTests(0xc000122d20?, {0xf97ac0, 0x210, 0x210}, {0xc00014c390?, 0x10?, 0xf9c3c0?})
/usr/local/google/home/bcmills/go/src/testing/testing.go:2050 +0x897
testing.(*M).Run(0xc000122d20)
/usr/local/google/home/bcmills/go/src/testing/testing.go:1923 +0xb58
net/http_test.TestMain(0x27f54a07e5eb5216?)
/usr/local/google/home/bcmills/go/src/net/http/main_test.go:24 +0x65
main.main()
_testmain.go:1169 +0x308
goroutine 48 [chan receive, 9 minutes]:
testing.(*T).Parallel(0xc0003044e0)
/usr/local/google/home/bcmills/go/src/testing/testing.go:1401 +0x570
net/http.TestCmdGoNoHTTPServer(0xc0003044e0)
/usr/local/google/home/bcmills/go/src/net/http/http_test.go:55 +0x3f
testing.tRunner(0xc0003044e0, 0xbbeaa0)
/usr/local/google/home/bcmills/go/src/testing/testing.go:1593 +0x21b
created by testing.(*T).Run in goroutine 1
/usr/local/google/home/bcmills/go/src/testing/testing.go:1646 +0x82b
goroutine 49 [chan receive, 9 minutes]:
testing.(*T).Parallel(0xc000304680)
/usr/local/google/home/bcmills/go/src/testing/testing.go:1401 +0x570
net/http.TestOmitHTTP2(0xc000304680)
/usr/local/google/home/bcmills/go/src/net/http/http_test.go:89 +0xfa
testing.tRunner(0xc000304680, 0xbbeb48)
/usr/local/google/home/bcmills/go/src/testing/testing.go:1593 +0x21b
created by testing.(*T).Run in goroutine 1
/usr/local/google/home/bcmills/go/src/testing/testing.go:1646 +0x82b
goroutine 50 [chan receive, 9 minutes]:
testing.(*T).Parallel(0xc000304820)
/usr/local/google/home/bcmills/go/src/testing/testing.go:1401 +0x570
net/http.TestOmitHTTP2Vet(0xc000304820)
/usr/local/google/home/bcmills/go/src/net/http/http_test.go:101 +0x3c
testing.tRunner(0xc000304820, 0xbbeb50)
/usr/local/google/home/bcmills/go/src/testing/testing.go:1593 +0x21b
created by testing.(*T).Run in goroutine 1
/usr/local/google/home/bcmills/go/src/testing/testing.go:1646 +0x82b
goroutine 91 [chan receive, 9 minutes]:
testing.(*T).Parallel(0xc00029a680)
/usr/local/google/home/bcmills/go/src/testing/testing.go:1401 +0x570
net/http.TestRequestWriteTransport(0xc00029a680)
/usr/local/google/home/bcmills/go/src/net/http/requestwrite_test.go:668 +0x3f
testing.tRunner(0xc00029a680, 0xbbebd8)
/usr/local/google/home/bcmills/go/src/testing/testing.go:1593 +0x21b
created by testing.(*T).Run in goroutine 1
/usr/local/google/home/bcmills/go/src/testing/testing.go:1646 +0x82b
goroutine 96 [chan receive, 9 minutes]:
testing.(*T).Parallel(0xc00029a4e0)
/usr/local/google/home/bcmills/go/src/testing/testing.go:1401 +0x570
net/http.TestReadResponseCloseInMiddle(0xc00029a4e0)
/usr/local/google/home/bcmills/go/src/net/http/response_test.go:647 +0x3f
testing.tRunner(0xc00029a4e0, 0xbbeba8)
/usr/local/google/home/bcmills/go/src/testing/testing.go:1593 +0x21b
created by testing.(*T).Run in goroutine 1
/usr/local/google/home/bcmills/go/src/testing/testing.go:1646 +0x82b
goroutine 6455 [chan receive, 9 minutes]:
testing.(*T).Parallel(0xc0001ce340)
/usr/local/google/home/bcmills/go/src/testing/testing.go:1401 +0x570
net/http_test.TestConsumingBodyOnNextConn(0xc0001ce340)
/usr/local/google/home/bcmills/go/src/net/http/serve_test.go:166 +0x3f
testing.tRunner(0xc0001ce340, 0xbbef40)
/usr/local/google/home/bcmills/go/src/testing/testing.go:1593 +0x21b
created by testing.(*T).Run in goroutine 1
/usr/local/google/home/bcmills/go/src/testing/testing.go:1646 +0x82b
goroutine 15029 [chan receive, 9 minutes]:
net/http_test.TestHandlerFinishSkipBigContentLengthRead(0xc0006d1860)
/usr/local/google/home/bcmills/go/src/net/http/serve_test.go:4602 +0x355
testing.tRunner(0xc0006d1860, 0xbbf158)
/usr/local/google/home/bcmills/go/src/testing/testing.go:1593 +0x21b
created by testing.(*T).Run in goroutine 1
/usr/local/google/home/bcmills/go/src/testing/testing.go:1646 +0x82b
FAIL net/http 600.041s
FAIL
(CC @neild)
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