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  1. Kafka
  2. KAFKA-5341

Add UnderMinIsrPartitionCount and per-partition UnderMinIsr metrics

    Details

    • Type: New Feature
    • Status: Resolved
    • Priority: Major
    • Resolution: Fixed
    • Affects Version/s: None
    • Fix Version/s: 1.0.0
    • Component/s: None
    • Labels:
      None

      Description

      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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              • Assignee:
                lindong Dong Lin
                Reporter:
                lindong Dong Lin
                Reviewer:
                Ewen Cheslack-Postava
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                Dates

                • Created:
                  Updated:
                  Resolved: