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https://issues.apache.org/jira/browse/KAFKA-16474?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Kirk True updated KAFKA-16474:
------------------------------
Labels: kip-848-client-support (was: )
> AsyncKafkaConsumer might send out heartbeat request without waiting for its
> response
> ------------------------------------------------------------------------------------
>
> Key: KAFKA-16474
> URL: https://issues.apache.org/jira/browse/KAFKA-16474
> Project: Kafka
> Issue Type: Bug
> Components: clients, consumer
> Reporter: Philip Nee
> Assignee: Philip Nee
> Priority: Critical
> Labels: kip-848-client-support
>
> KAFKA-16389
> We've discovered that in some uncommon cases, the consumer could send out
> successive heartbeats without waiting for the response to come back. this
> might result in causing the consumer to revoke its just assigned assignments
> in some cases. For example:
>
> The consumer first sends out a heartbeat with epoch=0 and memberId=''
> The consumer then rapidly sends out another heartbeat with epoch=0 and
> memberId='' because it has not gotten any response and thus not updating its
> local state
>
> The consumer receives assignments from the first heartbeat and reconciles its
> assignment.
>
> Since the second heartbeat has epoch=0 and memberId='', the server will think
> this is a new member joining and therefore send out an empty assignment.
>
> The consumer receives the response from the second heartbeat. Revoke all of
> its partitions.
>
> There are 2 issues associate with this bug:
> # inflight logic
> # rapid poll: In the KAFKA-16389 we've observe consumer polling interval to
> be a few ms.
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