satishd commented on code in PR #16873:
URL: https://github.com/apache/kafka/pull/16873#discussion_r1732980032


##########
core/src/main/scala/kafka/server/KafkaApis.scala:
##########
@@ -1103,35 +1103,41 @@ class KafkaApis(val requestChannel: RequestChannel,
 
     val responseTopics = authorizedRequestInfo.map { topic =>
       val responsePartitions = topic.partitions.asScala.map { partition =>
-        val topicPartition = new TopicPartition(topic.name, 
partition.partitionIndex)
-
-        try {
-          val offsets = replicaManager.legacyFetchOffsetsForTimestamp(
-            topicPartition = topicPartition,
-            timestamp = partition.timestamp,
-            maxNumOffsets = partition.maxNumOffsets,
-            isFromConsumer = offsetRequest.replicaId == 
ListOffsetsRequest.CONSUMER_REPLICA_ID,
-            fetchOnlyFromLeader = offsetRequest.replicaId != 
ListOffsetsRequest.DEBUGGING_REPLICA_ID)
+        if (partition.timestamp() < ListOffsetsRequest.EARLIEST_TIMESTAMP) {
           new ListOffsetsPartitionResponse()
             .setPartitionIndex(partition.partitionIndex)
-            .setErrorCode(Errors.NONE.code)
-            .setOldStyleOffsets(offsets.map(JLong.valueOf).asJava)
-        } catch {
-          // NOTE: UnknownTopicOrPartitionException and 
NotLeaderOrFollowerException are special cases since these error messages
-          // are typically transient and there is no value in logging the 
entire stack trace for the same
-          case e @ (_ : UnknownTopicOrPartitionException |
-                    _ : NotLeaderOrFollowerException |
-                    _ : KafkaStorageException) =>
-            debug("Offset request with correlation id %d from client %s on 
partition %s failed due to %s".format(
-              correlationId, clientId, topicPartition, e.getMessage))
-            new ListOffsetsPartitionResponse()
-              .setPartitionIndex(partition.partitionIndex)
-              .setErrorCode(Errors.forException(e).code)
-          case e: Throwable =>
-            error("Error while responding to offset request", e)
+            .setErrorCode(Errors.UNSUPPORTED_VERSION.code)
+        } else {
+          val topicPartition = new TopicPartition(topic.name, 
partition.partitionIndex)
+
+          try {
+            val offsets = replicaManager.legacyFetchOffsetsForTimestamp(

Review Comment:
   >I am not sure if tier storage supports downgrading MV. @satishd Do you know?
   
   Are you asking about downgrading it to 3.5-IV2? If so, it seems to be safe 
to downgrade it to 3.5 IV2 as the required APIs are available with that version.



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