Address frequent errors logged by compactor regarding meta not found #327
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joe-elliott
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Nov 9, 2020
…tor, to reduce compaction noise/errors
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joe-elliott
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What this PR does:
The compactor can log frequent errors like the following:
msg="unable to find meta during compaction. trying again on this block list". The root cause seems to be that when a block is compacted, it is updated in the storage backend, but not in the in-memory blocklist until the next polling cycle. This causes the stale entry to be considered for compaction on subsequent runs, causing the errors for several minutes (based on default timings).This PR updates the compactor to immediately update the in-memory blocklist to be aware of changes it makes: add the new blocks created during compaction, move the old ones to the compacted section. The changes are temporary and get overwritten during the next poll cycle, but are still helpful to cut down on the noise, and additionally will prevent failing/extra calls to the storage backend to load the meta.
Which issue(s) this PR fixes:
Checklist
CHANGELOG.mdupdated - the order of entries should be[CHANGE],[FEATURE],[ENHANCEMENT],[BUGFIX]