jsancio commented on code in PR #19800:
URL: https://github.com/apache/kafka/pull/19800#discussion_r2116128631
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raft/src/main/java/org/apache/kafka/raft/KafkaRaftClient.java:
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@@ -386,6 +385,11 @@ private void onUpdateLeaderHighWatermark(
// records still held in memory directly to the listener
appendPurgatory.maybeComplete(highWatermark.offset(),
currentTimeMs);
+ // After updating the high-watermark, complete all of the deferred
+ // fetch requests. This is always correct because all fetch request
+ // deffered have a HWM less or equal to the previous leader's HWM.
Review Comment:
Fixed.
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