satishd commented on code in PR #14004:
URL: https://github.com/apache/kafka/pull/14004#discussion_r1264876554
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storage/src/main/java/org/apache/kafka/server/log/remote/metadata/storage/RemoteLogLeaderEpochState.java:
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@@ -100,17 +100,22 @@ void
handleSegmentWithCopySegmentStartedState(RemoteLogSegmentId remoteLogSegmen
void handleSegmentWithCopySegmentFinishedState(Long startOffset,
RemoteLogSegmentId remoteLogSegmentId,
Long leaderEpochEndOffset) {
+ // If there are duplicate segments uploaded due to leader-election,
then mark them as unreferenced.
+ // Duplicate segments can be uploaded when the previous leader had
tier-lags and the next leader uploads the
+ // segment for the same leader-epoch which is a super-set of
previously uploaded segments.
+ Map.Entry<Long, RemoteLogSegmentId> lastEntry = offsetToId.lastEntry();
Review Comment:
Please add an example of overlapping segments int he doc here for reader's
clarity.
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