hachikuji commented on a change in pull request #10223:
URL: https://github.com/apache/kafka/pull/10223#discussion_r584145063



##########
File path: core/src/main/scala/kafka/server/KafkaApis.scala
##########
@@ -1884,20 +1884,24 @@ class KafkaApis(val requestChannel: RequestChannel,
       val authorizedDeleteTopics = 
authHelper.filterByAuthorized(request.context, DELETE, TOPIC,
         results.asScala.filter(result => result.name() != null))(_.name)
       results.forEach { topic =>
-        val unresolvedTopicId = !(topic.topicId() == Uuid.ZERO_UUID) && 
topic.name() == null
-         if (!config.usesTopicId && 
topicIdsFromRequest.contains(topic.topicId)) {
-           topic.setErrorCode(Errors.UNSUPPORTED_VERSION.code)
-           topic.setErrorMessage("Topic IDs are not supported on the server.")
-         } else if (unresolvedTopicId)
-             topic.setErrorCode(Errors.UNKNOWN_TOPIC_ID.code)
-         else if (topicIdsFromRequest.contains(topic.topicId) && 
!authorizedDescribeTopics(topic.name))
-           topic.setErrorCode(Errors.UNKNOWN_TOPIC_ID.code)
-         else if (!authorizedDeleteTopics.contains(topic.name))
-           topic.setErrorCode(Errors.TOPIC_AUTHORIZATION_FAILED.code)
-         else if (!metadataCache.contains(topic.name))
-           topic.setErrorCode(Errors.UNKNOWN_TOPIC_OR_PARTITION.code)
-         else
-           toDelete += topic.name
+        val unresolvedTopicId = topic.topicId() != Uuid.ZERO_UUID && 
topic.name() == null
+        if (!config.usesTopicId && 
topicIdsFromRequest.contains(topic.topicId)) {
+          topic.setErrorCode(Errors.UNSUPPORTED_VERSION.code)
+          topic.setErrorMessage("Topic IDs are not supported on the server.")
+        } else if (unresolvedTopicId) {
+          topic.setErrorCode(Errors.UNKNOWN_TOPIC_ID.code)
+        } else if (topicIdsFromRequest.contains(topic.topicId) && 
!authorizedDescribeTopics(topic.name)) {
+          // Because the client does not have Describe permission, the name 
should
+          // not be returned in the response.
+          topic.setName(null)

Review comment:
       That's a good question. I agree using `mapKey` makes less sense now. Let 
me try it out. If the diff is not too bad, we can do it here. Otherwise, we can 
do it separately.




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