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https://issues.apache.org/jira/browse/KAFKA-17518?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Lianet Magrans resolved KAFKA-17518.
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Resolution: Fixed
> AsyncKafkaConsumer cannot reliably leave group when closed with small timeout
> -----------------------------------------------------------------------------
>
> Key: KAFKA-17518
> URL: https://issues.apache.org/jira/browse/KAFKA-17518
> Project: Kafka
> Issue Type: Bug
> Components: clients, consumer
> Affects Versions: 3.9.0
> Reporter: Kirk True
> Assignee: Kirk True
> Priority: Major
> Labels: consumer-threading-refactor, kip-848-client-support
> Fix For: 4.0.0
>
>
> If {{close()}} is called with a short timeout (e.g. 0 ms), the process cannot
> complete, leading to the consumer remaining in the consumer group.
> On {{{}close(){}}}, the consumer attempts to unsubscribe and leave the
> consumer group. This process requires hops back and forth between the
> application and background threads to call the
> {{{}ConsumerRebalanceListener{}}}. Those hops add a nonzero amount of time to
> the close step.
> The events used to communicate between the application and background threads
> are based on the timeout provided by the user. If the timeout is not
> sufficient, the events will expire, and the process will be left incomplete.
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