[GitHub] [kafka] rajinisivaram commented on a change in pull request #9382: KAFKA-10554; Perform follower truncation based on diverging epochs in Fetch response

[GitBox]

rajinisivaram commented on a change in pull request #9382:
URL: https://github.com/apache/kafka/pull/9382#discussion_r511047757



##########
File path: core/src/main/scala/kafka/server/AbstractFetcherThread.scala
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@@ -341,11 +352,18 @@ abstract class AbstractFetcherThread(name: String,
                       // ReplicaDirAlterThread may have removed topicPartition 
from the partitionStates after processing the partition data
                       if (validBytes > 0 && 
partitionStates.contains(topicPartition)) {
                         // Update partitionStates only if there is no 
exception during processPartitionData
-                        val newFetchState = PartitionFetchState(nextOffset, 
Some(lag), currentFetchState.currentLeaderEpoch, state = Fetching)
+                        val newFetchState = PartitionFetchState(nextOffset, 
Some(lag),
+                          currentFetchState.currentLeaderEpoch, state = 
Fetching,
+                          Some(currentFetchState.currentLeaderEpoch))

Review comment:
       Oops, fixed.




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