dajac commented on code in PR #13240:
URL: https://github.com/apache/kafka/pull/13240#discussion_r1121487731


##########
core/src/main/scala/kafka/server/KafkaApis.scala:
##########
@@ -425,35 +425,63 @@ class KafkaApis(val requestChannel: RequestChannel,
       requestHelper.sendMaybeThrottle(request, 
offsetCommitRequest.getErrorResponse(Errors.UNSUPPORTED_VERSION.exception))
       CompletableFuture.completedFuture[Unit](())
     } else {
+      val topicNames =
+        if (offsetCommitRequest.version() >= 9)
+          metadataCache.topicIdsToNames()
+        else
+          Collections.emptyMap[Uuid, String]()
+
+      val resolvedTopics = new 
ArrayBuffer[OffsetCommitRequestData.OffsetCommitRequestTopic]()
+      offsetCommitRequest.data.topics.forEach { topic =>
+        var topicName = topic.name()
+        if (Utils.isBlank(topicName)) {

Review Comment:
   It would be better to rely on the version of the request instead of the 
topic name here.



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