FrankYang0529 commented on PR #19111:
URL: https://github.com/apache/kafka/pull/19111#issuecomment-2769816571

   Hi @showuon, thanks for the suggestion. Following are all references about 
`fetchLogSegment` and `fetchIndex`.
   
   * InputStream fetchLogSegment(RemoteLogSegmentMetadata 
remoteLogSegmentMetadata, int startPosition)
     * RemoteLogManager#lookupTimestamp: 
https://github.com/apache/kafka/blob/1eea7f0528954ce8dcbcc4357ae2ef28c1d1e5f2/core/src/main/java/kafka/log/remote/RemoteLogManager.java#L653-L655
     * RemoteLogManager#read: 
https://github.com/apache/kafka/blob/1eea7f0528954ce8dcbcc4357ae2ef28c1d1e5f2/core/src/main/java/kafka/log/remote/RemoteLogManager.java#L1744-L1748
     * _LocalTieredStorageTest#verifyFetchedLogSegment: Fixed by this PR._
   * InputStream fetchLogSegment(RemoteLogSegmentMetadata 
remoteLogSegmentMetadata, int startPosition, int endPosition)
     * LocalTieredStorageTest: All usage throws exception before creating input 
stream.
   * InputStream fetchIndex(RemoteLogSegmentMetadata remoteLogSegmentMetadata, 
IndexType indexType)
     * _TierStateMachine#readLeaderEpochCheckpoint and 
TierStateMachine#buildProducerSnapshotFile: Fixed by this PR._
     * RemoteIndexCache#createCacheEntry: The input stream is supplied by a 
function and is closed in RemoteIndexCache#loadIndexFile. 
https://github.com/apache/kafka/blob/1eea7f0528954ce8dcbcc4357ae2ef28c1d1e5f2/storage/src/main/java/org/apache/kafka/storage/internals/log/RemoteIndexCache.java#L355-L357
     * _LocalTieredStorageTest#verifyFetchedOffsetIndex, 
LocalTieredStorageTest#verifyFetchedTimeIndex, 
LocalTieredStorageTest#verifyFetchedTransactionIndex, 
LocalTieredStorageTest#verifyLeaderEpochCheckpoint, and 
LocalTieredStorageTest#verifyProducerSnapshot: Fixed by this PR. The input 
stream is closed in LocalTieredStorageTest#verifyFileContents._


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