FrankYang0529 commented on code in PR #19364:
URL: https://github.com/apache/kafka/pull/19364#discussion_r2030671804


##########
core/src/main/scala/kafka/server/KafkaApis.scala:
##########
@@ -1520,6 +1520,10 @@ class KafkaApis(val requestChannel: RequestChannel,
         requestHelper.sendErrorResponseMaybeThrottle(request, 
Errors.TRANSACTIONAL_ID_AUTHORIZATION_FAILED.exception)
         return
       }
+      if (initProducerIdRequest.enable2Pc() && 
!authHelper.authorize(request.context, TWO_PHASE_COMMIT, TRANSACTIONAL_ID, 
transactionalId)) {
+        requestHelper.sendErrorResponseMaybeThrottle(request, 
Errors.TRANSACTIONAL_ID_AUTHORIZATION_FAILED.exception)

Review Comment:
   The `TRANSACTIONAL_ID_AUTHORIZATION_FAILED` is returned when client lacks 
either `WRITE` or `TWO_PHASE_COMMIT` permissions. Should we include information 
about which specific permission needs to be granted to the user in order to 
complete the operation?



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