x/net/ipv6: TestPacketConnReadWriteMulticast{UDP,ICMP} failing with "i/o timeout" on OpenBSD 6.8 #42064

bcmills · 2020-10-19T13:33:52Z

TestPacketConnReadWriteMulticastUDP is failing fairly consistently on the openbsd-arm-jsing builders. It should either be fixed or skipped.

--- FAIL: TestPacketConnReadWriteMulticastUDP (0.21s)
    multicast_test.go:114: read udp [::]:6423: raw-read udp6 [::]:6423: i/o timeout
FAIL
FAIL	golang.org/x/net/ipv6	0.294s

Note that this failure mode is different from the one on Darwin (#37319) and the one previously reported for OpenBSD (#33843).

CC @4a6f656c @golang/osp-team

The text was updated successfully, but these errors were encountered:

tklauser · 2020-12-02T13:15:10Z

This test consistently fails on the openbsd-arm64-jsing and the 386/amd64 builders running OpenBSD 6.8 as well:

openbsd-arm64-jsing: https://build.golang.org/log/be54c3c8bfe2313b55b63b76bc5af92d6c39a524
openbsd-386-68: https://build.golang.org/log/eea81ada598c39d224d3a9a40b4739bbbe739b09
openbsd-amd64-68: https://build.golang.org/log/9039640721536372ca5170299ee6e923aa3775dd

The test also failed on https://golang.org/cl/274772 on the openbsd-mips64-jsing builder.

It doesn't seem to fail on builder running OpenBSD 6.2 or 6.4.

dmitshur · 2020-12-14T23:42:03Z

It doesn't seem to fail on builder running OpenBSD 6.2 or 6.4.

It'd be helpful to find out if the test runs or gets skipped on OpenBSD 6.4. (It's possible it's passing in 6.4 because IPv6 isn't supported there and it gets skipped.)

bcmills · 2020-12-21T16:37:02Z

Marking as release-blocker via #11811, especially since this doesn't seem builder- or arch-specific.

But note that OpenBSD is not a first-class port, so it may be viable to unblock the release by skipping the test on the affected builders — especially given that this appears to be either a regression in the kernel or an incompatible ABI change.

gopherbot · 2020-12-21T19:29:05Z

Change https://golang.org/cl/279512 mentions this issue: dashboard: promote OpenBSD 6.8 builders to be default

The known issue with OpenBSD 6.8 builders appears to be resolved via CL 278732 and CL 279134. Promote them to the primary OpenBSD post-submit builders and TryBots. Having test coverage from OpenBSD 6.8 and 6.4 builders gives us us more confidence that Go works on supported OpenBSD versions (which are 6.8 and 6.7 at this time, per past policy decision in https://golang.org/issue/15227#issuecomment-293319876). Reduce numTryTestHelpers from 5 to 4 based on some data from golang.org/issue/37439 showing that going from 3 to 5 helpers doesn't make a significant difference. We can adjust further if we learn that OpenBSD TryBots become the bottleneck. Fixes golang/go#35712. For golang/go#42542. For golang/go#42064. Updates golang/go#42426. Change-Id: Id2fa4be7c3161f89752c1428146846fe06ca63db Reviewed-on: https://go-review.googlesource.com/c/build/+/279512 Run-TryBot: Dmitri Shuralyov <dmitshur@golang.org> TryBot-Result: Go Bot <gobot@golang.org> Reviewed-by: Carlos Amedee <carlos@golang.org> Reviewed-by: Alexander Rakoczy <alex@golang.org> Trust: Dmitri Shuralyov <dmitshur@golang.org>

gopherbot · 2020-12-23T19:27:41Z

Change https://golang.org/cl/280052 mentions this issue: ipv6: skip known-failing tests on OpenBSD 6.8 builders

These tests are known to be failing on OpenBSD 6.8 and need investigation. The OpenBSD 6.8 builders are default TryBots now, so skip them to prevent people working on other packages from constantly getting a failure. Issue 42064 remains open to do the work of determining if the ipv6 package needs to be fixed, or if OpenBSD 6.8 has a problem and the test can be permanently skipped as unsupported. For golang/go#11811. Updates golang/go#42064. Updates golang/go#35712. Change-Id: I59883384e4dbce679cb1a4e8e2c3f0fa7983010b Reviewed-on: https://go-review.googlesource.com/c/net/+/280052 Run-TryBot: Dmitri Shuralyov <dmitshur@golang.org> TryBot-Result: Go Bot <gobot@golang.org> Reviewed-by: Alexander Rakoczy <alex@golang.org> Trust: Dmitri Shuralyov <dmitshur@golang.org>

dmitshur · 2020-12-24T01:51:06Z

@4a6f656c Do openbsd-{arm,arm64,mips64}-jsing builders all run OpenBSD 6.8? If not, the issue title may need to be adjusted further.

toothrot · 2021-01-07T19:16:15Z

@4a6f656c Just a friendly ping on this release-blocker in the new year. Do you have any updates?

cagedmantis · 2021-01-13T23:10:13Z

@4a6f656c Have there been any updates with this issue. We are approaching the release and this is a release-blocker.

tklauser · 2021-01-14T08:54:59Z

I quickly checked the arm64 and mips64 builders using gomote (the arm builder seems to be offline). They seem to be running OpenBSD 6.8 (uname -a output):

openbsd-arm64-jsing:
OpenBSD gopher-arm64.sing.id.au 6.8 GENERIC.MP#2 arm64

openbsd-mips64-jsing:
OS: OpenBSD er4.sing.id.au 6.8 GENERIC.MP#0 octeon

Assuming that the offline openbsd-arm-jsing builder also runs at least 6.7 (see #25498 (comment)) and that OpenBSD version might be affected the same, I've sent https://golang.org/cl/283752 to include openbsd-{arm,arm64,mips64}-jsing in the list of builders to skip the test on.

gopherbot · 2021-01-14T08:55:21Z

Change https://golang.org/cl/283752 mentions this issue: ipv6: skip known-failing tests on openbsd-{arm,arm64,mips64}-jsing builders

bcmills added OS-OpenBSD NeedsInvestigation labels Oct 19, 2020

gopherbot added this to the Unreleased milestone Oct 19, 2020

dmitshur added the arch-arm label Oct 19, 2020

bcmills changed the title ~~x/net/ipv6: TestPacketConnReadWriteMulticastUDP failing with "i/o timeout" on openbsd-arm-jsing builders~~ x/net/ipv6: TestPacketConnReadWriteMulticastUDP failing with "i/o timeout" on OpenBSD builders Dec 21, 2020

bcmills removed the arch-arm label Dec 21, 2020

bcmills added the release-blocker label Dec 21, 2020

bcmills modified the milestones: Unreleased, Go1.16 Dec 21, 2020

dmitshur changed the title ~~x/net/ipv6: TestPacketConnReadWriteMulticastUDP failing with "i/o timeout" on OpenBSD builders~~ x/net/ipv6: TestPacketConnReadWriteMulticast{UDP,ICMP} failing with "i/o timeout" on OpenBSD 6.8 Dec 24, 2020

golang / go

x/net/ipv6: TestPacketConnReadWriteMulticast{UDP,ICMP} failing with "i/o timeout" on OpenBSD 6.8 #42064

x/net/ipv6: TestPacketConnReadWriteMulticast{UDP,ICMP} failing with "i/o timeout" on OpenBSD 6.8 #42064

bcmills commented Oct 19, 2020

tklauser commented Dec 2, 2020

dmitshur commented Dec 14, 2020 •

edited

bcmills commented Dec 21, 2020

gopherbot commented Dec 21, 2020

gopherbot commented Dec 23, 2020

dmitshur commented Dec 24, 2020 •

edited

toothrot commented Jan 7, 2021

cagedmantis commented Jan 13, 2021

tklauser commented Jan 14, 2021

gopherbot commented Jan 14, 2021

golang / go

x/net/ipv6: TestPacketConnReadWriteMulticast{UDP,ICMP} failing with "i/o timeout" on OpenBSD 6.8 #42064

x/net/ipv6: TestPacketConnReadWriteMulticast{UDP,ICMP} failing with "i/o timeout" on OpenBSD 6.8 #42064

Comments

bcmills commented Oct 19, 2020

tklauser commented Dec 2, 2020

dmitshur commented Dec 14, 2020 • edited

bcmills commented Dec 21, 2020

gopherbot commented Dec 21, 2020

gopherbot commented Dec 23, 2020

dmitshur commented Dec 24, 2020 • edited

toothrot commented Jan 7, 2021

cagedmantis commented Jan 13, 2021

tklauser commented Jan 14, 2021

gopherbot commented Jan 14, 2021

dmitshur commented Dec 14, 2020 •

edited

dmitshur commented Dec 24, 2020 •

edited