KAFKA-18056: Fixed bug in handling commitAsync responses #17909
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AndrewJSchofield
suggested changes
Nov 22, 2024
| @@ -421,6 +421,10 @@ public void onComplete(Map<TopicIdPartition, Set<Long>> offsetsMap, Exception ex | |||
| Set<Long> mergedOffsets = new HashSet<>(); | |||
| mergedOffsets.addAll(oldOffsets); | |||
| mergedOffsets.addAll(newOffsets); | |||
| if (mergedOffsets.size() < (oldOffsets.size() + newOffsets.size())) { | |||
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I think this is quite a dangerous thing to leave in here. In principle, a test could rely upon repeated delivery of a record (timeout for example) which could actually call the callback twice. I'd remove this because I predict it will be the source of a flaky test later on.
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Ah right makes sense, sometimes genuinely we can have the callback called twice. I have removed it now, thanks.
...ts/src/main/java/org/apache/kafka/clients/consumer/internals/ShareConsumeRequestManager.java
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What
There was a bug in handling the
ShareAcknowledgeResponseforcommitAsync(). Currently after we receive a response, we send out a background event to the application thread to update the acknowledgement commit callbacks for EVERYTopicIdPartition.The map that was sent was not cleared after sending the event. This meant we ended up sending responses for partitions that were already sent in the previous event. So there will be duplicate calls to the callback.
The PR fixes the bug and adds a unit test for the same.