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intermittent failure in ext.rpm-ostree.destructive.container-image #4567

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cgwalters opened this issue Aug 30, 2023 · 2 comments
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intermittent failure in ext.rpm-ostree.destructive.container-image #4567

cgwalters opened this issue Aug 30, 2023 · 2 comments
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area/ci-flake Tracker for CI flakes or bugs triaged This issue was triaged

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@cgwalters
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[2023-08-30T15:00:16.554Z] Aug 30 14:59:54 qemu0 kola-runext-container-image[1134]: + rpm-ostree rebase ostree-unverified-image:containers-storage:localhost/fcos-derived
[2023-08-30T15:00:16.554Z] Aug 30 14:59:54 qemu0 kola-runext-container-image[1957]: Pulling manifest: ostree-unverified-image:containers-storage:localhost/fcos-derived
[2023-08-30T15:00:16.554Z] Aug 30 14:59:54 qemu0 kola-runext-container-image[1957]: Importing: ostree-unverified-image:containers-storage:localhost/fcos-derived (digest: sha256:db32a3de020c5f7c74191e50690ad520c2158ccae3b99734cd59f15e0d9b73da)
[2023-08-30T15:00:16.554Z] Aug 30 14:59:54 qemu0 kola-runext-container-image[1957]: ostree chunk layers needed: 1 (1.5?GB)
[2023-08-30T15:00:16.554Z] Aug 30 14:59:54 qemu0 kola-runext-container-image[1957]: custom layers needed: 1 (24.7?MB)
[2023-08-30T15:00:16.554Z] Aug 30 15:00:15 qemu0 kola-runext-container-image[1957]: error: Importing: Parsing layer blob sha256:00623c39da63781bdd3fb00fedb36f8b9ec95e42cdb4d389f692457f24c67144: Failed to invoke skopeo proxy method FinishPipe: remote error: write |1: broken pipe
[2023-08-30T15:00:16.554Z] Aug 30 15:00:15 qemu0 systemd[1]: kola-runext.service: Main process exited, code=exited, status=1/FAILURE
[2023-08-30T15:00:16.554Z] Aug 30 15:00:15 qemu0 systemd[1]: kola-runext.service: Failed with result 'exit-code'.
[2023-08-30T15:00:16.554Z] Aug 30 15:00:15 qemu0 systemd[1]: kola-runext.service: Consumed 36.730s CPU time.

This one is a bit concerning because it's been happening more frequently recently I think. Also, I think we may be running into something related to https://github.com/ostreedev/ostree-rs-ext/blob/bd77743c21280b0089c7146668e4c72f4d588143/lib/src/container/unencapsulate.rs#L143 which is masking the real error.
@cgwalters cgwalters added triaged This issue was triaged area/ci-flake Tracker for CI flakes or bugs labels Aug 30, 2023
This was referenced Aug 30, 2023
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cgwalters added a commit to cgwalters/ostree-rs-ext that referenced this issue Aug 31, 2023
@cgwalters
container: Add a trace log for when we discard "broken pipe" error
e39b727 
I don't think we're hitting this in coreos/rpm-ostree#4567
but it'd be useful to have a trace message in case.
cgwalters added a commit to cgwalters/ostree-rs-ext that referenced this issue Aug 31, 2023
@cgwalters
tar: Hold open input stream as long as possible
13455cc 
I'm hoping this will help us debug coreos/rpm-ostree#4567
```
[2023-08-30T15:00:16.554Z] Aug 30 15:00:15 qemu0 kola-runext-container-image[1957]: error: Importing: Parsing layer blob sha256:00623c39da63781bdd3fb00fedb36f8b9ec95e42cdb4d389f692457f24c67144: Failed to invoke skopeo proxy method FinishPipe: remote error: write |1: broken pipe
```

I haven't been able to reproduce it outside of CI yet, but we had
a prior ugly hack for this in
ostreedev@a27dac8

As the comments say - the goal is to hold open the input stream
as long as feasibly possible.
@cgwalters cgwalters mentioned this issue Aug 31, 2023
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cgwalters commented Sep 1, 2023 •
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Discoveries so far:

More generally it's definitely a race condition; I can sometimes reproduce this by doing
ostree refs --delete ostree/container and then re-running the rebase.

Also of note: kola defaults to a uniprocessor VM, which I think is more likely to expose this race.

I'm quite certain it has something to do with the scheduling of us closing the pipe vs calling FinishPipe.

@cgwalters cgwalters mentioned this issue Sep 13, 2023
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@henrywang henrywang mentioned this issue Mar 11, 2024
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@cgwalters cgwalters mentioned this issue Jun 1, 2024
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@jeckersb jeckersb mentioned this issue Jun 10, 2024
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@cgwalters cgwalters mentioned this issue Aug 30, 2024
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@cgwalters
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Moving this to ostreedev/ostree-rs-ext#657

@cgwalters cgwalters closed this as not planned Won't fix, can't repro, duplicate, stale Aug 30, 2024
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