junrao commented on code in PR #18321:
URL: https://github.com/apache/kafka/pull/18321#discussion_r1905822853


##########
core/src/main/scala/kafka/log/UnifiedLog.scala:
##########
@@ -757,7 +769,8 @@ class UnifiedLog(@volatile var logStartOffset: Long,
                      leaderEpoch: Int,
                      requestLocal: Option[RequestLocal],
                      verificationGuard: VerificationGuard,
-                     ignoreRecordSize: Boolean): LogAppendInfo = {
+                     ignoreRecordSize: Boolean,
+                     toMagic: Byte = RecordBatch.CURRENT_MAGIC_VALUE): 
LogAppendInfo = {

Review Comment:
   There is some validation logic for v0/v1 records in `LogValidator`, which is 
potentially useful for ingesting records of old format. So, we can keep this as 
it is for now.



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