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https://issues.apache.org/jira/browse/KAFKA-5341?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Ewen Cheslack-Postava updated KAFKA-5341:
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Fix Version/s: 1.0.0
> Add UnderMinIsrPartitionCount and per-partition UnderMinIsr metrics
> -------------------------------------------------------------------
>
> Key: KAFKA-5341
> URL: https://issues.apache.org/jira/browse/KAFKA-5341
> Project: Kafka
> Issue Type: New Feature
> Reporter: Dong Lin
> Assignee: Dong Lin
> Fix For: 1.0.0
>
>
> We currently have under replicated partitions, but we do not have a metric to
> track the number of partitions whose in-sync replicas count < minIsr.
> Partitions whose in-syn replicas count < minIsr will be unavailable to those
> producers who uses ack = all. It is important for Kafka operators to be
> notified of the existence of such partition because their existence reduces
> the availability of the Kafka service.
> More specifically, we can define a per-broker metric
> UnderMinIsrPartitionCount as "The number of partitions that this broker leads
> for which in-sync replicas count < minIsr." So if the RF was 3, and min ISR
> is 2, then when there are 2 replicas in ISR this partition would be in the
> under replicated partitions count. When there is 1 replica in ISR, this
> partition would also be in the UnderMinIsrPartitionCount.
> See
> https://cwiki.apache.org/confluence/display/KAFKA/KIP-164-+Add+UnderMinIsrPartitionCount+and+per-partition+UnderMinIsr+metrics
> for more detail.
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