ijuma commented on code in PR #12006:
URL: https://github.com/apache/kafka/pull/12006#discussion_r850086685


##########
clients/src/main/java/org/apache/kafka/clients/producer/internals/TransactionManager.java:
##########
@@ -187,7 +187,7 @@ private static class TopicPartitionEntry {
         private static final Comparator<ProducerBatch> 
PRODUCER_BATCH_COMPARATOR = (b1, b2) -> {
             if (b1.baseSequence() < b2.baseSequence()) return -1;
             else if (b1.baseSequence() > b2.baseSequence()) return 1;
-            else return b1.equals(b2) ? 0 : 1;
+            else return Integer.compare(b1.hashCode(), b2.hashCode());

Review Comment:
   The assumption about object addresses and hashCode is what I was referring 
to.



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