chia7712 commented on code in PR #20106:
URL: https://github.com/apache/kafka/pull/20106#discussion_r2190801972


##########
core/src/main/scala/kafka/server/ReplicaFetcherThread.scala:
##########
@@ -166,12 +166,12 @@ class ReplicaFetcherThread(name: String,
     val partition = replicaMgr.getPartitionOrException(tp)
     val log = partition.localLogOrException
 
-    partition.truncateTo(offsetTruncationState.offset, isFuture = false)
-
     if (offsetTruncationState.offset < log.highWatermark)

Review Comment:
   Perhaps this log could be moved into `UnifiedLog#truncateTo`.  
`UnifiedLog#truncateTo` already logs if the target offset is larger than or 
equal to end offset, so adding another log for this case seems to make sense. 
Additionally, `ReplicaAlterLogDirsThread` could issue the same warning if the 
log is moved to `UnifiedLog#truncateTo`



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