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chore: [k200] fix(blooms): Handle not found metas gracefully #12856

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merged 1 commit into from
May 2, 2024

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Backport 37c8822 from #12853


What this PR does / why we need it:

There is a time window between between listing metas and fetching them from object storage which could lead to a race condition that the meta is not found in object storage, because it was deleted and superseded by a newer meta.

This can happen when querying recent bloom data, that is still subject to updates, and results in an error like this:

rpc error: code = Unknown desc = failed to get meta file bloom/tsdb_index_19843/XXXX/metas/18fbdc8500000000-1921d15dffffffff-270affee.json: storage: object doesn't exist
(Trace ID: 4fe28d32cfa3e3df9495c3a5d4a683fb)

Checklist

  • Reviewed the CONTRIBUTING.md guide (required)
  • Documentation added
  • Tests updated
  • Title matches the required conventional commits format, see here
    • Note that Promtail is considered to be feature complete, and future development for logs collection will be in Grafana Alloy. As such, feat PRs are unlikely to be accepted unless a case can be made for the feature actually being a bug fix to existing behavior.
  • Changes that require user attention or interaction to upgrade are documented in docs/sources/setup/upgrade/_index.md
  • For Helm chart changes bump the Helm chart version in production/helm/loki/Chart.yaml and update production/helm/loki/CHANGELOG.md and production/helm/loki/README.md. Example PR
  • If the change is deprecating or removing a configuration option, update the deprecated-config.yaml and deleted-config.yaml files respectively in the tools/deprecated-config-checker directory. Example PR

There is a time window between between listing metas and fetching them from object storage which could lead to a race condition that the meta is not found in object storage, because it was deleted and superseded by a newer meta.

This can happen when querying recent bloom data, that is still subject to updates, and results in an error like this:

```
rpc error: code = Unknown desc = failed to get meta file bloom/tsdb_index_19843/XXXX/metas/18fbdc8500000000-1921d15dffffffff-270affee.json: storage: object doesn't exist
(Trace ID: 4fe28d32cfa3e3df9495c3a5d4a683fb)
```

Signed-off-by: Christian Haudum <[email protected]>
(cherry picked from commit 37c8822)
@grafanabot grafanabot requested a review from a team as a code owner May 2, 2024 11:48
@grafanabot grafanabot added backport size/M type/bug Somehing is not working as expected labels May 2, 2024
@grafanabot grafanabot requested a review from chaudum May 2, 2024 11:48
@chaudum chaudum merged commit f00a0da into k200 May 2, 2024
62 checks passed
@chaudum chaudum deleted the backport-12853-to-k200 branch May 2, 2024 11:54
chaudum added a commit that referenced this pull request May 3, 2024
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