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https://issues.apache.org/jira/browse/KAFKA-14220?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17603056#comment-17603056
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Pritam Kumar commented on KAFKA-14220:
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The following is the patch made and verified:
*https://github.com/apache/kafka/pull/12622*
> "partition-count" not getting updated after revocation of partitions in case
> of Incremental Co-operative rebalancing.
> ---------------------------------------------------------------------------------------------------------------------
>
> Key: KAFKA-14220
> URL: https://issues.apache.org/jira/browse/KAFKA-14220
> Project: Kafka
> Issue Type: Bug
> Components: KafkaConnect
> Affects Versions: 3.0.1
> Reporter: Pritam Kumar
> Priority: Major
>
> In case of the revocation of partitions, the updation of "partition count"
> metrics is being done before updating the new set of assignments.
> "{*}invokePartitionsRevoked{*}" method of "{*}onJoinComplete{*}" function of
> "{*}ConsumerCoordinator{*}" class is being called before the "
> {*}subscriptions.assignFromSubscribed(assignedPartitions){*}" of the same
> class. As a result of which the *old assigned partition count* is getting
> updated again and again even after future rebalances.
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