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x/build/devapp: https://dev.golang.org/reviews page was unavailable on Aug 13, 2021 due to unexpected Gerrit behavior #47695

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rhysh opened this issue Aug 13, 2021 · 5 comments
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x/build/devapp: https://dev.golang.org/reviews page was unavailable on Aug 13, 2021 due to unexpected Gerrit behavior #47695

rhysh opened this issue Aug 13, 2021 · 5 comments
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Builders x/build issues (builders, bots, dashboards) FrozenDueToAge NeedsInvestigation Someone must examine and confirm this is a valid issue and not a duplicate of an existing one.
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Unreleased

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@rhysh
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rhysh commented Aug 13, 2021

What version of Go are you using (go version)?

N/A

Does this issue reproduce with the latest release?

This is a problem with a live website.

What operating system and processor architecture are you using (go env)?

N/A

What did you do?

I opened https://dev.golang.org/ in my browser and clicked the "Open reviews" link.

What did you expect to see?

A list of Gerrit links

What did you see instead?

https://dev.golang.org/reviews in Chrome shows an error page referencing "ERR_HTTP2_PROTOCOL_ERROR". Curl also reports a problem:

$ curl https://dev.golang.org/reviews
curl: (92) HTTP/2 stream 1 was not closed cleanly: INTERNAL_ERROR (err 2)
@gopherbot gopherbot added the Builders x/build issues (builders, bots, dashboards) label Aug 13, 2021
@gopherbot gopherbot added this to the Unreleased milestone Aug 13, 2021
@rhysh
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rhysh commented Aug 13, 2021

With HTTP/1.1, it's an empty response (no headers). Maybe a panic before the first write to the body (or WriteHeader). Not specific to http/2.

$ curl --http1.1 https://dev.golang.org/reviews
curl: (52) Empty reply from server

@rhysh rhysh changed the title x/build/devapp: http/2 protocol error on https://dev.golang.org/reviews x/build/devapp: no response for https://dev.golang.org/reviews (protocol error) Aug 13, 2021
@dmitshur
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Thanks for reporting.

I'm not able to reproduce the issue right now (which is 1-2 hours after the report). What about you @rhysh, does it still reproduce for you?

I do see in logs there have been panics. There was an issue with Gerrit (go-review.googlesource.com) that coincides with the time of this report, and it looks like it uncovered some possible panics in golang.org/x/build/maintner.

@dmitshur dmitshur added the NeedsInvestigation Someone must examine and confirm this is a valid issue and not a duplicate of an existing one. label Aug 13, 2021
@rhysh
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rhysh commented Aug 13, 2021

Yes, the page loads for me now too. Thanks for investigating!

@dmitshur dmitshur changed the title x/build/devapp: no response for https://dev.golang.org/reviews (protocol error) x/build/devapp: https://dev.golang.org/reviews page was unavailable on Aug 13, 2021 due to unexpected Gerrit behavior Aug 14, 2021
@dmitshur dmitshur mentioned this issue Jan 6, 2022
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@dmitshur
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dmitshur commented Jan 6, 2022

I've looked into the panic in golang.org/x/build/maintner, and it seems the panic cannot happen under normal situations, only if Gerrit is misbehaving somehow. Since it only happened that one time so far, I can't tell if it was a one-off problem that was resolved, or something we need to update the code to anticipate happening again.

I filed #50474 for tracking the problem in maintner, and will close this issue since it's resolved.

@dmitshur dmitshur closed this as completed Jan 6, 2022
@gopherbot
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Change https://go.dev/cl/408194 mentions this issue: devapp: propagate updateReviewsData error from ForeachProjectUnsorted

gopherbot pushed a commit to golang/build that referenced this issue May 24, 2022
@dmitshur @gopherbot
devapp: propagate updateReviewsData error from ForeachProjectUnsorted
fb495b9 
CL 407394 added a detailed error in case of a rare, unexpected problem.
Propagate it in one more place so we benefit from the new information
if this happens again.

Updates golang/go#47695.
Updates golang/go#50474.

Change-Id: Iddb9a8d8de320d535fd15842c60bf0274391f8f2
Reviewed-on: https://go-review.googlesource.com/c/build/+/408194
TryBot-Result: Gopher Robot <gobot@golang.org>
Reviewed-by: Dmitri Shuralyov <dmitshur@google.com>
Run-TryBot: Dmitri Shuralyov <dmitshur@golang.org>
Run-TryBot: Dmitri Shuralyov <dmitshur@google.com>
Auto-Submit: Dmitri Shuralyov <dmitshur@google.com>
Reviewed-by: Bryan Mills <bcmills@google.com>
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