dengziming commented on code in PR #13845:
URL: https://github.com/apache/kafka/pull/13845#discussion_r1228931662
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raft/src/main/java/org/apache/kafka/raft/KafkaRaftClient.java:
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@@ -1017,7 +1017,16 @@ private FetchResponseData tryCompleteFetchRequest(
long fetchOffset = request.fetchOffset();
int lastFetchedEpoch = request.lastFetchedEpoch();
LeaderState<T> state = quorum.leaderStateOrThrow();
- ValidOffsetAndEpoch validOffsetAndEpoch =
log.validateOffsetAndEpoch(fetchOffset, lastFetchedEpoch);
+
+ Optional<OffsetAndEpoch> latestSnapshotId = log.latestSnapshotId();
+ final ValidOffsetAndEpoch validOffsetAndEpoch;
+ if (fetchOffset == 0 && latestSnapshotId.isPresent()) {
Review Comment:
I have tried to figure out some other cases we prefer to read the snapshot,
a common case is `highWatermark` - `fetchOffset` > count(snapshot record). Do
you think it's possible to write count(snapshot record) in the snapshot header?
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