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https://issues.apache.org/jira/browse/KAFKA-7557?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Jun Rao resolved KAFKA-7557.
----------------------------
Resolution: Fixed
Fix Version/s: 2.2.0
merged to trunk
> optimize LogManager.truncateFullyAndStartAt()
> ---------------------------------------------
>
> Key: KAFKA-7557
> URL: https://issues.apache.org/jira/browse/KAFKA-7557
> Project: Kafka
> Issue Type: Bug
> Affects Versions: 2.0.0, 2.1.0
> Reporter: Jun Rao
> Assignee: huxihx
> Priority: Major
> Fix For: 2.2.0
>
>
> When a ReplicaFetcherThread calls LogManager.truncateFullyAndStartAt() for a
> partition, we call LogManager.checkpointLogRecoveryOffsetsInDir() and then
> Log.deleteSnapshotsAfterRecoveryPointCheckpoint() on all the logs in that
> directory. This requires listing all the files in each log dir to figure out
> the snapshot files. If some logs have many log segment files. This could take
> some time. The can potentially block a replica fetcher thread, which
> indirectly causes the request handler threads to be blocked.
>
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