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https://issues.apache.org/jira/browse/KAFKA-14457?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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José Armando García Sancio resolved KAFKA-14457.
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Resolution: Fixed
> Inconsistent in quorum controller fenced broker metric
> ------------------------------------------------------
>
> Key: KAFKA-14457
> URL: https://issues.apache.org/jira/browse/KAFKA-14457
> Project: Kafka
> Issue Type: Bug
> Affects Versions: 3.1.0, 3.2.0, 3.1.1, 3.3.0, 3.1.2, 3.2.1, 3.2.2, 3.2.3,
> 3.3.1
> Reporter: José Armando García Sancio
> Assignee: José Armando García Sancio
> Priority: Major
> Fix For: 3.4.0
>
>
> It is possible for controllers to replay a record twice. This happens when
> the active controller replays an uncommitted record, resigns and replays the
> same record when it becomes committed.
> The controller handles these transition changes by using timeline data
> structures and reverting to previous in-memory snapshots.
> This functionality is not used when computing the fenced and unfenced
> metrics. Specifically, the metric can over count when executing this code:
> {code:java}
> } else if (prevRegistration == null) {
> if (registration.fenced()) {
>
> controllerMetrics.setFencedBrokerCount(controllerMetrics.fencedBrokerCount()
> + 1);
> log.info("Added new fenced broker: {}", registration.id());
> } else {
>
> controllerMetrics.setActiveBrokerCount(controllerMetrics.activeBrokerCount()
> + 1);
> log.info("Added new unfenced broker: {}",
> registration.id());
> }{code}
> From {{ClusterControlManager::updateMetrics.}}
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