Metrics Generator: Max limit on number of failed flushes - #4254
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joe-elliott merged 4 commits intoOct 31, 2024
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Signed-off-by: Joe Elliott <number101010@gmail.com>
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October 31, 2024 12:10
Signed-off-by: Joe Elliott <number101010@gmail.com>
javiermolinar
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Oct 31, 2024
| go func() { | ||
| time.Sleep(delay) | ||
| if _, err := p.flushqueue.Enqueue(op); err != nil { | ||
| _ = level.Error(p.logger).Log("msg", "failed to requeue block for flushing", "err", err) |
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What happens if we fail to requeue? Should we delete the block as well?
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i think no. the only time enqueue can fail is if the queue is stopped:
https://github.com/grafana/tempo/blob/main/pkg/flushqueues/priority_queue.go#L91-L93
in this case the process is shutting down and so we want to keep the block for when it starts back up. we could definitely be more explicit about this tho.
mattdurham
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Jun 18, 2026
* dont retry failed flushes Signed-off-by: Joe Elliott <number101010@gmail.com> * changelog Signed-off-by: Joe Elliott <number101010@gmail.com> * add sleep for backoff Signed-off-by: Joe Elliott <number101010@gmail.com> * add err Signed-off-by: Joe Elliott <number101010@gmail.com> --------- Signed-off-by: Joe Elliott <number101010@gmail.com>
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What this PR does:
Institutes a very generous limit of 100 on failed flush attempts as well as a metric to help track this. This prevents constant retries on blocks that cannot be flushed due to corruption.
Checklist
CHANGELOG.mdupdated - the order of entries should be[CHANGE],[FEATURE],[ENHANCEMENT],[BUGFIX]