Jun Rao created KAFKA-7557:
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             Summary: 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


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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