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x/net/http2: connection-level flow control not returned if stream errors, causes server hang [1.14 backport] #41386

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gopherbot opened this issue Sep 14, 2020 · 7 comments
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x/net/http2: connection-level flow control not returned if stream errors, causes server hang [1.14 backport] #41386

gopherbot opened this issue Sep 14, 2020 · 7 comments
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CherryPickApproved Used during the release process for point releases FrozenDueToAge
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Go1.14.11

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@gopherbot
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@ianlancetaylor requested issue #40423 to be considered for backport to the next 1.14 minor release.

@gopherbot Please open backport issues.

This problem can reportedly cause an HTTP/2 connection to hang. There doesn't seem to be any reasonable workaround.
@gopherbot gopherbot added the CherryPickCandidate Used during the release process for point releases label Sep 14, 2020
@gopherbot gopherbot mentioned this issue Sep 14, 2020
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@gopherbot gopherbot added this to the Go1.14.10 milestone Sep 14, 2020
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Change https://golang.org/cl/258497 mentions this issue: [release-branch.go1.14] net/http2: send WINDOW_UPDATE on a body's write failure

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Change https://golang.org/cl/258537 mentions this issue: [release-branch.go1.14] net/http: backport HTTP2 send WINDOW_UPDATE on a body's write failure

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Change https://golang.org/cl/258538 mentions this issue: [release-branch.go1.14] net/http: backport HTTP2 send WINDOW_UPDATE on a body's write failure

@dmitshur dmitshur mentioned this issue Oct 8, 2020
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dmitshur commented Oct 8, 2020

We've considered this in a release meeting. Approving as it is a serious issue without a workaround. This backport applies to both 1.15 (#41387) and 1.14 (this issue).

@dmitshur dmitshur added CherryPickApproved Used during the release process for point releases and removed CherryPickCandidate Used during the release process for point releases labels Oct 8, 2020
gopherbot pushed a commit to golang/net that referenced this issue Oct 12, 2020
@fraenkel @dmitshur
[release-branch.go1.14] net/http2: send WINDOW_UPDATE on a body's wri…
9ef5ab9 
…te failure

When the body.Write fails during processData, the connection flow
control must be updated to account for the data received. The connection's
WINDOW_UPDATE should reflect the amount of data that was not successfully
written. The stream is about to be closed, so no update is required.

Updates golang/go#40423.
Fixes golang/go#41386.

Change-Id: I546597cedf3715e6617babcb3b62140bf1857a27
Reviewed-on: https://go-review.googlesource.com/c/net/+/245158
Reviewed-by: Emmanuel Odeke <emm.odeke@gmail.com>
Reviewed-by: Ian Lance Taylor <iant@golang.org>
Run-TryBot: Emmanuel Odeke <emm.odeke@gmail.com>
TryBot-Result: Go Bot <gobot@golang.org>
Trust: Emmanuel Odeke <emm.odeke@gmail.com>
(cherry picked from commit 5d4f700)
Reviewed-on: https://go-review.googlesource.com/c/net/+/258497
Trust: Dmitri Shuralyov <dmitshur@golang.org>
Run-TryBot: Dmitri Shuralyov <dmitshur@golang.org>
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@dmitshur dmitshur reopened this Oct 12, 2020
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Reopening for updating vendored and bundled copies in the standard library.

@dmitshur dmitshur reopened this Oct 12, 2020
@toothrot toothrot modified the milestones: Go1.14.10, Go1.14.11 Oct 14, 2020
gopherbot pushed a commit that referenced this issue Oct 22, 2020
@odeke-em @dmitshur
[release-branch.go1.14] src, net/http: update vendor, regenerate h2_b…
7bc8381 
…undle.go

Features CL:

    net/http2: send WINDOW_UPDATE on a body's write failure (fixes #41386)
    https://golang.org/cl/258497

Created by:

go get -d golang.org/x/net@release-branch.go1.14
go mod tidy
go mod vendor
go generate -run=bundle std

Updates #40423
Fixes #41386

Change-Id: I3e75527d381dd4c4262db5f2ff755029d448c48b
Reviewed-on: https://go-review.googlesource.com/c/go/+/258538
Run-TryBot: Emmanuel Odeke <emm.odeke@gmail.com>
Reviewed-by: Dmitri Shuralyov <dmitshur@golang.org>
Trust: Emmanuel Odeke <emm.odeke@gmail.com>
TryBot-Result: Go Bot <gobot@golang.org>
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Closed by merging 7bc8381 to release-branch.go1.14.

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