jsancio commented on code in PR #13845:
URL: https://github.com/apache/kafka/pull/13845#discussion_r1235409277


##########
raft/src/main/java/org/apache/kafka/raft/KafkaRaftClient.java:
##########
@@ -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:
   Thanks @dengziming 
   
   We had a similar conversation in another PR: 
https://github.com/apache/kafka/pull/13834#discussion_r1224779841
   
   In short, it is not clear to me that these improvements (implementation 
complexities) are a big win for the cluster metadata partition.



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