kamalcph commented on code in PR #14352:
URL: https://github.com/apache/kafka/pull/14352#discussion_r1318418335
##########
storage/api/src/main/java/org/apache/kafka/server/log/remote/storage/RemoteStorageManager.java:
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@@ -121,14 +121,17 @@ InputStream fetchLogSegment(RemoteLogSegmentMetadata
remoteLogSegmentMetadata,
/**
* Returns the index for the respective log segment of {@link
RemoteLogSegmentMetadata}.
+ * <p>
+ * Note: The transaction index may not exist because segments created
prior to version 2.8.0 or non-transactional topics...etc.
+ * In this case, it should still return an InputStream with empty content,
instead of returning {@code null}.
*
* @param remoteLogSegmentMetadata metadata about the remote log segment.
* @param indexType type of the index to be fetched for the
segment.
* @return input stream of the requested index.
* @throws RemoteStorageException if there are any errors while
fetching the index.
* @throws RemoteResourceNotFoundException the requested index is not
found in the remote storage
- * (e.g. Transaction index may not exist because segments created prior to
version 2.8.0 will not have transaction index associated with them.).
- * The caller of this function are encouraged to re-create the indexes
from the segment
Review Comment:
Good to remove this line.
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