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net: TestVariousDeadlines failing on plan9/386 builder #26945

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0intro opened this Issue Aug 12, 2018 · 5 comments

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@dmitshur dmitshur

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0intro commented Aug 12, 2018

TestVariousDeadlines is regularly failing on the plan9/386 builder.

--- FAIL: TestVariousDeadlines (6.21s)
    timeout_test.go:880: 1ns run 1/1
    timeout_test.go:905: for 1ns run 1/1, good client timeout after 81.296µs, reading 0 bytes
    timeout_test.go:915: for 1ns run 1/1, server in 3.50244ms wrote 458752: readfrom tcp 127.0.0.1:43229->127.0.0.1:62762: write tcp 127.0.0.1:43229->127.0.0.1:62762: write /net/tcp/166/data: Hangup
    timeout_test.go:880: 2ns run 1/1
    timeout_test.go:905: for 2ns run 1/1, good client timeout after 56.991µs, reading 0 bytes
    timeout_test.go:915: for 2ns run 1/1, server in 7.46919ms wrote 1048576: readfrom tcp 127.0.0.1:43229->127.0.0.1:38454: write tcp 127.0.0.1:43229->127.0.0.1:38454: write /net/tcp/167/data: Hangup
    timeout_test.go:880: 5ns run 1/1
    timeout_test.go:905: for 5ns run 1/1, good client timeout after 58.667µs, reading 0 bytes
    timeout_test.go:915: for 5ns run 1/1, server in 7.167473ms wrote 1048576: readfrom tcp 127.0.0.1:43229->127.0.0.1:59766: write tcp 127.0.0.1:43229->127.0.0.1:59766: write /net/tcp/168/data: Hangup
    timeout_test.go:880: 50ns run 1/1
    timeout_test.go:905: for 50ns run 1/1, good client timeout after 56.153µs, reading 0 bytes
    timeout_test.go:915: for 50ns run 1/1, server in 4.392508ms wrote 524288: readfrom tcp 127.0.0.1:43229->127.0.0.1:62830: write tcp 127.0.0.1:43229->127.0.0.1:62830: write /net/tcp/169/data: Hangup
    timeout_test.go:880: 100ns run 1/1
    timeout_test.go:905: for 100ns run 1/1, good client timeout after 56.153µs, reading 0 bytes
    timeout_test.go:915: for 100ns run 1/1, server in 4.517385ms wrote 622592: readfrom tcp 127.0.0.1:43229->127.0.0.1:50076: write tcp 127.0.0.1:43229->127.0.0.1:50076: write /net/tcp/170/data: Hangup
    timeout_test.go:880: 200ns run 1/1
    timeout_test.go:905: for 200ns run 1/1, good client timeout after 57.829µs, reading 0 bytes
    timeout_test.go:915: for 200ns run 1/1, server in 3.538478ms wrote 458752: readfrom tcp 127.0.0.1:43229->127.0.0.1:44015: write tcp 127.0.0.1:43229->127.0.0.1:44015: write /net/tcp/171/data: Hangup
    timeout_test.go:880: 500ns run 1/1
    timeout_test.go:905: for 500ns run 1/1, good client timeout after 64.534µs, reading 0 bytes
    timeout_test.go:915: for 500ns run 1/1, server in 3.929036ms wrote 524288: readfrom tcp 127.0.0.1:43229->127.0.0.1:50845: write tcp 127.0.0.1:43229->127.0.0.1:50845: write /net/tcp/172/data: Hangup
    timeout_test.go:880: 750ns run 1/1
    timeout_test.go:905: for 750ns run 1/1, good client timeout after 56.991µs, reading 0 bytes
    timeout_test.go:915: for 750ns run 1/1, server in 7.222787ms wrote 1048576: readfrom tcp 127.0.0.1:43229->127.0.0.1:54489: write tcp 127.0.0.1:43229->127.0.0.1:54489: write /net/tcp/173/data: Hangup
    timeout_test.go:880: 1µs run 1/1
    timeout_test.go:905: for 1µs run 1/1, good client timeout after 56.991µs, reading 0 bytes
    timeout_test.go:915: for 1µs run 1/1, server in 4.337192ms wrote 557056: readfrom tcp 127.0.0.1:43229->127.0.0.1:55578: write tcp 127.0.0.1:43229->127.0.0.1:55578: write /net/tcp/174/data: Hangup
    timeout_test.go:880: 5µs run 1/1
    timeout_test.go:905: for 5µs run 1/1, good client timeout after 59.506µs, reading 0 bytes
    timeout_test.go:915: for 5µs run 1/1, server in 3.603013ms wrote 458752: readfrom tcp 127.0.0.1:43229->127.0.0.1:35569: write tcp 127.0.0.1:43229->127.0.0.1:35569: write /net/tcp/175/data: Hangup
    timeout_test.go:880: 25µs run 1/1
    timeout_test.go:905: for 25µs run 1/1, good client timeout after 57.829µs, reading 0 bytes
    timeout_test.go:915: for 25µs run 1/1, server in 2.280483ms wrote 294912: readfrom tcp 127.0.0.1:43229->127.0.0.1:58149: write tcp 127.0.0.1:43229->127.0.0.1:58149: write /net/tcp/176/data: Hangup
    timeout_test.go:880: 250µs run 1/1
    timeout_test.go:910: for 250µs run 1/1, timeout (5s) waiting for client to timeout (250µs) reading
FAIL
FAIL	net	30.849s

See https://build.golang.org/log/4b9709667343395dcd2d93c1447461e4fb807a33

This is related to issue #19519.

@millerresearch

@0intro 0intro added OS-Plan9 Builders labels Aug 12, 2018

@0intro 0intro added this to the Unplanned milestone Aug 12, 2018

@0intro 0intro self-assigned this Aug 12, 2018

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gopherbot commented Aug 12, 2018

Change https://golang.org/cl/129098 mentions this issue: env: disable aux/timesync in Plan 9 image

@bradfitz bradfitz assigned dmitshur Aug 13, 2018

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gopherbot commented Aug 21, 2018

Change https://golang.org/cl/130137 mentions this issue: dashboard: bump plan9-386-v5 image to v6

@gopherbot gopherbot closed this in golang/build@e2a0be4 Aug 21, 2018

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dmitshur commented Aug 21, 2018 •
edited

Re-opening so we can confirm that the flakiness gets fixed after the change is deployed.

Edit: The change from CL 129098 is deployed now.

@dmitshur dmitshur reopened this Aug 21, 2018

gopherbot pushed a commit to golang/build that referenced this issue Aug 21, 2018

@dmitshur
dashboard: bump plan9-386-v5 image to v6 
plan9-386-v6 is a new plan9-386 image built with the change
done in CL 129098.

I tested it with cmd/debugnewvm on latest Go master commit,
and all stdlib tests passed, including TestVariousDeadlines.
(cmd/... tests didn't finish in time before cmd/debugnewvm
timed out.) Running it 3 more times, there was still one
TestVariousDeadlines failure and 2 successes, so we'll have
to keep watching it.

Updates golang/go#26945.

Change-Id: Ibd1e990e60c3a69a5fddede18d7a121fa319e79d
Reviewed-on: https://go-review.googlesource.com/130137
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
08651b1
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gopherbot commented Dec 5, 2018

Change https://golang.org/cl/152721 mentions this issue: net: skip TestVariousDeadlines on Plan 9

gopherbot pushed a commit that referenced this issue Dec 5, 2018

@0intro @bradfitz
net: skip TestVariousDeadlines on Plan 9 
This test is regularly failing on the plan9/386
builder running on GCE, but we haven't figured
out the issue yet.

Updates #26945.

Change-Id: I8cbe0df43c0757e7bc68e370311f4a28cd7b049b
Reviewed-on: https://go-review.googlesource.com/c/152721
Run-TryBot: David du Colombier <0intro@gmail.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
09f5411
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