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https://issues.apache.org/jira/browse/KAFKA-15278?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17773429#comment-17773429
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Philip Nee commented on KAFKA-15278:
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The basic heartbeat is implemented. We are missing the assignment
reconciliation and heartbeat on close logic.
> Implement client support for KIP-848 ConsumerGroupHeartbeat protocol RPC
> ------------------------------------------------------------------------
>
> Key: KAFKA-15278
> URL: https://issues.apache.org/jira/browse/KAFKA-15278
> Project: Kafka
> Issue Type: Sub-task
> Components: clients, consumer
> Reporter: Kirk True
> Assignee: Philip Nee
> Priority: Major
> Labels: consumer-threading-refactor, kip-848,
> kip-848-client-support, kip-848-e2e, kip-848-preview
>
> The necessary Java code that represents the {{ConsumerGroupHeartbeatRequest}}
> and {{ConsumerGroupHeartbeatResponse}} are already present in the codebase.
> It is assumed that the scaffolding for the other two will come along in time.
> * Implement {{ConsumerGroupRequestManager}}
> * Ensure that {{DefaultBackgroundThread}} correctly calculates I/O timeouts
> so that the heartbeat occurs within the {{group.consumer.session.timeout.ms}}
> interval regardless of other {{RequestManager}} instance activity
> * Ensure error is handled correctly
> * Ensure MembershipStateManager is updated on both successful and failures
> cases, and the state machine is transioned to the correct state.
> This task is part of the work to implement support for the new KIP-848
> consumer group protocol.
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