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cmd/cover: test timeout after 18m on plan9-arm #48416

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millerresearch opened this issue Sep 16, 2021 · 4 comments
Open

cmd/cover: test timeout after 18m on plan9-arm #48416

millerresearch opened this issue Sep 16, 2021 · 4 comments
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@millerresearch
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@millerresearch millerresearch commented Sep 16, 2021

The cmd/cover test has been timing out quite frequently on plan9-arm. Most recent example here

I don't know how far back in time this goes. Is there a simple way to search failed test results to find the earliest occurrence?

@cagedmantis cagedmantis added the NeedsInvestigation label Sep 16, 2021
@cagedmantis cagedmantis added this to the Backlog milestone Sep 16, 2021
@cagedmantis
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@cagedmantis cagedmantis commented Sep 16, 2021

You may be able to accomplish what you are seeking through the use of fetchlogs.

@millerresearch
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@millerresearch millerresearch commented Sep 20, 2021

You may be able to accomplish what you are seeking through the use of fetchlogs.

Thanks. Looks like the first failure was Jan 27 2021, then frequent occurrences from 3 March onwards.

I've managed to replicate the timeout once. Proximate cause is that go list -e json htmlunformatted appears to be deadlocked.

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@millerresearch millerresearch commented Sep 21, 2021

The "deadlock" was lockedfile.openFile looping on a file in /tmp which was not actually locked: a bug in Plan 9 ramfs which was fixed some time ago, but somehow the patch wasn't applied on the plan9_arm builders. So, my fault. Should be OK now.

@millerresearch
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@millerresearch millerresearch commented Nov 3, 2021

Still getting timeouts, so I'd better reopen the issue and investigate further.

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