chirag-wadhwa5 commented on code in PR #16456:
URL: https://github.com/apache/kafka/pull/16456#discussion_r1669817534


##########
core/src/main/scala/kafka/server/KafkaApis.scala:
##########
@@ -4004,6 +4471,99 @@ class KafkaApis(val requestChannel: RequestChannel,
     CompletableFuture.completedFuture[Unit](())
   }
 
+
+  def getAcknowledgeBatchesFromShareFetchRequest(
+                                                  shareFetchRequest : 
ShareFetchRequest,
+                                                  topicNames : util.Map[Uuid, 
String],
+                                                  erroneous : 
mutable.Map[TopicIdPartition, ShareAcknowledgeResponseData.PartitionData],
+                                                ) : 
mutable.Map[TopicIdPartition, util.List[ShareAcknowledgementBatch]] = {
+
+    val acknowledgeBatchesMap = mutable.Map[TopicIdPartition, 
util.List[ShareAcknowledgementBatch]]()
+    shareFetchRequest.data().topics().forEach ( topic => {
+
+      if(!topicNames.asScala.contains(topic.topicId)) {
+        topic.partitions.forEach((partition: 
ShareFetchRequestData.FetchPartition) => {
+          val topicIdPartition = new TopicIdPartition(
+            topic.topicId,
+            new TopicPartition(null, partition.partitionIndex))
+          erroneous +=
+            topicIdPartition -> 
ShareAcknowledgeResponse.partitionResponse(topicIdPartition, 
Errors.UNKNOWN_TOPIC_ID)
+        })
+      }
+      else {
+        topic.partitions().forEach ( partition => {
+          val topicIdPartition = new TopicIdPartition(
+            topic.topicId(),
+            new TopicPartition(topicNames.get(topic.topicId()), 
partition.partitionIndex())
+          )

Review Comment:
   Not currently. I think that can be done using the MetadataCache which is 
accessible in the KafkaApis. I will create a separate JIRA for this. Thanks !



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