junrao commented on code in PR #19635:
URL: https://github.com/apache/kafka/pull/19635#discussion_r2073910505


##########
core/src/main/scala/kafka/server/KafkaApis.scala:
##########
@@ -413,8 +413,6 @@ class KafkaApis(val requestChannel: RequestChannel,
         val topicPartition = new TopicPartition(topicName, partition.index())
         if (topicName.isEmpty)

Review Comment:
   This is another subtle existing issue. If a produce request before v13 has 
an empty topic name, we used to return UNKNOWN_TOPIC_OR_PARTITION. Now, we 
return UNKNOWN_TOPIC_ID. It's probably better to change the condition to `if 
(topicName.isEmpty && topic.topicId().equals(Uuid.ZERO_UUID))`.



##########
core/src/test/scala/integration/kafka/api/AuthorizerIntegrationTest.scala:
##########
@@ -924,6 +924,33 @@ class AuthorizerIntegrationTest extends 
AbstractAuthorizerIntegrationTest {
     sendRequests(requestKeyToRequest, false, topicNames)
   }
 
+  @Test
+  def 
testAuthorizationWithTopicNotExistingForProduceReqeustVersionLessThan13(): Unit 
= {
+    for (version <- ApiKeys.PRODUCE.oldestVersion to 12) {
+      val request = requests.ProduceRequest.builder(new ProduceRequestData()
+          .setTopicData(new ProduceRequestData.TopicProduceDataCollection(
+            util.List.of(new ProduceRequestData.TopicProduceData()
+                .setName(tp.topic())

Review Comment:
   We could. I am just pointing out this doesn't match the test name, which 
says `WithTopicNotExisting`.



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