ijuma commented on code in PR #14568:
URL: https://github.com/apache/kafka/pull/14568#discussion_r1364207881


##########
core/src/main/scala/kafka/log/UnifiedLog.scala:
##########
@@ -1080,9 +1080,9 @@ class UnifiedLog(@volatile var logStartOffset: Long,
     (updatedProducers, completedTxns.toList, None)
   }
 
-  private def batchMissingRequiredVerification(batch: MutableRecordBatch, 
requestVerificationGuard: Object): Boolean = {
+  private def batchMissingRequiredVerification(batch: MutableRecordBatch, 
requestVerificationGuard: VerificationGuard): Boolean = {
     
producerStateManager.producerStateManagerConfig().transactionVerificationEnabled()
 && !batch.isControlBatch &&
-      (requestVerificationGuard != verificationGuard(batch.producerId) || 
requestVerificationGuard == null)
+      (requestVerificationGuard == null || 
!requestVerificationGuard.equals(verificationGuard(batch.producerId)))

Review Comment:
   I think you'd actually want to have a method in `VerificationGuard` to do 
the comparison, not `equals`. That method would then check for the sentinel and 
do the right thing. Does that make sense?



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