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net/http: data race during TestTrailersClientToServer_h2 #22721

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ALTree opened this issue Nov 14, 2017 · 3 comments

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commented Nov 14, 2017

TestTrailersClientToServer_h2 triggers a data race. It was caught by a race builder here: https://build.golang.org/log/ede024321618b97ce309d1b255b936493545bc50

I can easily reproduce it on tip doing this:

$ cd /src/net/http
$ gotip test -race -run=TestTrailersClientToServer_h2 -count 500

==================
WARNING: DATA RACE
Write at 0x00c42015e0f0 by goroutine 37:
  net/http.(*http2clientConnReadLoop).processSettings.func1()
      /home/alberto/go/src/net/http/h2_bundle.go:8497 +0x3cb
  net/http.(*http2SettingsFrame).ForeachSetting()
      /home/alberto/go/src/net/http/h2_bundle.go:2038 +0x171
  net/http.(*http2clientConnReadLoop).processSettings()
      /home/alberto/go/src/net/http/h2_bundle.go:8494 +0x196
  net/http.(*http2clientConnReadLoop).run()
      /home/alberto/go/src/net/http/h2_bundle.go:8040 +0x6c5
  net/http.(*http2ClientConn).readLoop()
      /home/alberto/go/src/net/http/h2_bundle.go:7922 +0xde

Previous read at 0x00c42015e0f0 by goroutine 45:
  net/http.(*http2ClientConn).writeHeaders()
      /home/alberto/go/src/net/http/h2_bundle.go:7503 +0x57
  net/http.(*http2clientStream).writeRequestBody()
      /home/alberto/go/src/net/http/h2_bundle.go:7630 +0x81e
  net/http.(*http2Transport).getBodyWriterState.func1()
      /home/alberto/go/src/net/http/h2_bundle.go:8758 +0x129

Goroutine 37 (running) created at:
  net/http.(*http2Transport).newClientConn()
      /home/alberto/go/src/net/http/h2_bundle.go:7106 +0xd49
  net/http.(*http2Transport).NewClientConn()
      /home/alberto/go/src/net/http/h2_bundle.go:7043 +0x55
  net/http.(*http2addConnCall).run()
      /home/alberto/go/src/net/http/h2_bundle.go:836 +0x55

Goroutine 45 (running) created at:
  net/http.http2bodyWriterState.scheduleBodyWrite()
      /home/alberto/go/src/net/http/h2_bundle.go:8805 +0xb2
  net/http.(*http2ClientConn).RoundTrip()
      /home/alberto/go/src/net/http/h2_bundle.go:7361 +0x71d
  net/http.(*http2Transport).RoundTripOpt()
      /home/alberto/go/src/net/http/h2_bundle.go:6877 +0x3b7
  net/http.(*http2Transport).RoundTrip()
      /home/alberto/go/src/net/http/h2_bundle.go:6839 +0x4b
  net/http.(*Transport).RoundTrip()
      /home/alberto/go/src/net/http/transport.go:411 +0x986
  net/http.send()
      /home/alberto/go/src/net/http/client.go:252 +0x352
  net/http.(*Client).send()
      /home/alberto/go/src/net/http/client.go:176 +0x1b0
  net/http.(*Client).Do()
      /home/alberto/go/src/net/http/client.go:615 +0x4dd
  net/http_test.testTrailersClientToServer()
      /home/alberto/go/src/net/http/clientserver_test.go:611 +0x630
  net/http_test.TestTrailersClientToServer_h2()
      /home/alberto/go/src/net/http/clientserver_test.go:567 +0x3d
  testing.tRunner()
      /home/alberto/go/src/testing/testing.go:769 +0x169
==================
--- FAIL: TestTrailersClientToServer_h2 (0.01s)
	testing.go:722: race detected during execution of test
FAIL
exit status 1
FAIL	net/http	7.988s

We also have #22678 but the reported race seems different; may be a different bug.

@ALTree ALTree added this to the Go1.10 milestone Nov 14, 2017

@odeke-em

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commented Nov 14, 2017

I too can reproduce this on tip, thanks for the repro @ALTree.

@tombergan tombergan self-assigned this Nov 21, 2017

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commented Nov 22, 2017

Change https://golang.org/cl/79238 mentions this issue: http2: fix race on ClientConn.maxFrameSize

gopherbot pushed a commit to golang/net that referenced this issue Nov 27, 2017

http2: fix race on ClientConn.maxFrameSize
This fixes TestTrailersClientToServer_h2. Before this CL, the following
command reliably fails. With this CL merged into net/http, the following
command reliably succeeds.

go test -race -run=TestTrailersClientToServer_h2 -count 1000 net/http

Updates golang/go#22721

Change-Id: I05d1504c60854fcf3ae9531f36a126e94b00f0b7
Reviewed-on: https://go-review.googlesource.com/79238
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
Run-TryBot: Brad Fitzpatrick <bradfitz@golang.org>
Run-TryBot: Emmanuel Odeke <emm.odeke@gmail.com>
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commented Nov 28, 2017

Change https://golang.org/cl/80078 mentions this issue: net/http: update bundled http2

@gopherbot gopherbot closed this in 5b649ff Nov 28, 2017

c3mb0 pushed a commit to c3mb0/net that referenced this issue Apr 2, 2018

http2: fix race on ClientConn.maxFrameSize
This fixes TestTrailersClientToServer_h2. Before this CL, the following
command reliably fails. With this CL merged into net/http, the following
command reliably succeeds.

go test -race -run=TestTrailersClientToServer_h2 -count 1000 net/http

Updates golang/go#22721

Change-Id: I05d1504c60854fcf3ae9531f36a126e94b00f0b7
Reviewed-on: https://go-review.googlesource.com/79238
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
Run-TryBot: Brad Fitzpatrick <bradfitz@golang.org>
Run-TryBot: Emmanuel Odeke <emm.odeke@gmail.com>

jasonwbarnett pushed a commit to jasonwbarnett/fileserver that referenced this issue Jul 11, 2018

net/http: update bundled http2
Update http2 to x/net git rev db473f6b23.

(And un-skip TestWriteHeader0_h2 added in CL 80077, now fixed.)

Includes:

   http2: remove afterReqBodyWriteError wrapper
   https://golang.org/cl/75252

   http2: fix transport data race on reused *http.Request objects
   https://golang.org/cl/75530

   http2: require either ECDSA or RSA ciphersuite
   https://golang.org/cl/30721

   http2: don't log about timeouts reading client preface on new connections
   https://golang.org/cl/79498

   http2: don't crash in Transport on server's DATA following bogus HEADERS
   https://golang.org/cl/80056

   http2: panic on invalid WriteHeader status code
   https://golang.org/cl/80076

   http2: fix race on ClientConn.maxFrameSize
   https://golang.org/cl/79238

   http2: don't autodetect Content-Type when the response has an empty body
   https://golang.org/cl/80135

Fixes golang/go#18776
Updates golang/go#20784
Fixes golang/go#21316
Fixes golang/go#22721
Fixes golang/go#22880

Change-Id: Ie86e24e0ee2582a5a82afe5de3c7c801528be069
Reviewed-on: https://go-review.googlesource.com/80078
Run-TryBot: Brad Fitzpatrick <bradfitz@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Tom Bergan <tombergan@google.com>

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