jolshan commented on code in PR #13607:
URL: https://github.com/apache/kafka/pull/13607#discussion_r1180864382


##########
core/src/main/scala/kafka/server/ReplicaManager.scala:
##########
@@ -642,7 +642,14 @@ class ReplicaManager(val config: KafkaConfig,
           (entriesPerPartition, Map.empty)
         else
           entriesPerPartition.partition { case (topicPartition, records) =>
-            
getPartitionOrException(topicPartition).hasOngoingTransaction(records.firstBatch().producerId())
+            // Produce requests (only requests that require verification) 
should only have one batch in "batches" but check all just to be safe.
+            val transactionalBatches = records.batches.asScala.filter(batch => 
batch.hasProducerId && batch.isTransactional)

Review Comment:
   it would be the other way around, we can have a producer id but not be 
transactional with idempotent producers.



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