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https://issues.apache.org/jira/browse/KAFKA-16639?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17851197#comment-17851197
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Chia-Ping Tsai commented on KAFKA-16639:
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I have shipped the PR into trunk and 3.8
[~frankvicky] thanks for all your contribution. nice fix!
> AsyncKafkaConsumer#close does not send heartbeat to leave group
> ---------------------------------------------------------------
>
> Key: KAFKA-16639
> URL: https://issues.apache.org/jira/browse/KAFKA-16639
> Project: Kafka
> Issue Type: Bug
> Components: clients, consumer
> Reporter: Chia-Ping Tsai
> Assignee: TengYao Chi
> Priority: Critical
> Labels: kip-848-client-support
> Fix For: 3.8.0
>
>
> This bug can be reproduced by immediately closing a consumer which is just
> created.
> The root cause is that we skip the new heartbeat used to leave group when
> there is a in-flight heartbeat request
> ([https://github.com/apache/kafka/blob/5de5d967adffd864bad3ec729760a430253abf38/clients/src/main/java/org/apache/kafka/clients/consumer/internals/HeartbeatRequestManager.java#L212).]
> It seems to me the simple solution is that we create a heartbeat request when
> meeting above situation and then send it by pollOnClose
> ([https://github.com/apache/kafka/blob/5de5d967adffd864bad3ec729760a430253abf38/clients/src/main/java/org/apache/kafka/clients/consumer/internals/RequestManager.java#L62).]
>
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