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https://issues.apache.org/jira/browse/KAFKA-20315?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Andrew Schofield resolved KAFKA-20315.
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Fix Version/s: 4.4.0
Resolution: Fixed
> Add test for single in-flight poll event logic in async/share consumer
> ----------------------------------------------------------------------
>
> Key: KAFKA-20315
> URL: https://issues.apache.org/jira/browse/KAFKA-20315
> Project: Kafka
> Issue Type: Test
> Components: clients, consumer
> Reporter: Lianet Magrans
> Assignee: Nilesh Kumar
> Priority: Minor
> Labels: newbie
> Fix For: 4.4.0
>
>
> The async and share consumer send a single poll event to the background when
> there is a call to consumer.poll. Even though there may be continuous calls
> to poll (triggered internally from the do-while within consumer.poll, or
> externally if the app continously calls consumer.poll), the intention is to
> not generate a new poll event as long as the inflight hasn't completed or
> expired.
> New event created here only:
> [https://github.com/apache/kafka/blob/2f2d9b0172ec6bfee6d332ff8b7cd39f2660a964/clients/src/main/java/org/apache/kafka/clients/consumer/internals/AsyncKafkaConsumer.java#L903]
> Seems there is no unit test coverage for inflight management, which should be
> helpful to catch regressions (if by mistake we revert to sending too many
> poll events).
> Found this test gap while reviewing the changes for ShareConsumer
> [https://github.com/apache/kafka/pull/21757#pullrequestreview-3954153888]
> This is good beginner Jira to get into the new consumer and share consumer
> threading model
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