ijuma commented on code in PR #12006:
URL: https://github.com/apache/kafka/pull/12006#discussion_r850109104
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clients/src/main/java/org/apache/kafka/clients/producer/internals/TransactionManager.java:
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@@ -187,7 +187,7 @@ private void startSequencesAtBeginning(TopicPartition
topicPartition, ProducerId
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 b1.equals(b2) ? 0 : Integer.compare(b1.hashCode(),
b2.hashCode());
Review Comment:
That's true, we can't rely on hashcode if equals is false either. I'll take
a look at the code a bit later, but it should be possible to avoid the latent
bug here.
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