aliehsaeedii commented on code in PR #20325:
URL: https://github.com/apache/kafka/pull/20325#discussion_r2273302083


##########
core/src/main/scala/kafka/server/AutoTopicCreationManager.scala:
##########
@@ -135,10 +190,17 @@ class DefaultAutoTopicCreationManager(
         clearInflightRequests(creatableTopics)
         if (response.authenticationException() != null) {
           warn(s"Auto topic creation failed for ${creatableTopics.keys} with 
authentication exception")
+          cacheTopicCreationErrors(creatableTopics.keys.toSet, "Authentication 
failed")
         } else if (response.versionMismatch() != null) {
           warn(s"Auto topic creation failed for ${creatableTopics.keys} with 
invalid version exception")
+          cacheTopicCreationErrors(creatableTopics.keys.toSet, "Version 
mismatch")
         } else {
-          debug(s"Auto topic creation completed for ${creatableTopics.keys} 
with response ${response.responseBody}.")
+          response.responseBody() match {
+            case createTopicsResponse: CreateTopicsResponse =>
+              cacheTopicCreationErrorsFromResponse(createTopicsResponse)

Review Comment:
   Oh, I see you check the error before putting it in cache. Mmm, hard to say. 
As the above if/else blocks may not cover the entire error cases, let's keep 
it. 



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