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Posted to dev@kafka.apache.org by "Matthias J. Sax (Jira)" <ji...@apache.org> on 2026/07/31 22:13:00 UTC

[jira] [Created] (KAFKA-20877) Streams task-level restore-rate and update-rate incorrect

Matthias J. Sax created KAFKA-20877:
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             Summary: Streams task-level restore-rate and update-rate incorrect
                 Key: KAFKA-20877
                 URL: https://issues.apache.org/jira/browse/KAFKA-20877
             Project: Kafka
          Issue Type: Bug
          Components: streams
    Affects Versions: 3.5.0
            Reporter: Matthias J. Sax


The task-level metrics restore-rate/restore-total (active tasks) and update-rate/update-total (standby tasks) are meant to report how many changelog records were restored or updated. update-rate is documented as "The average number of records updated per second".

However, the rate-metric is incorrectly captured. It counts how many times the sensor was recorded and discards the value (number of records restored), so it incorrectly reports restore/update batches per second.

Introduced via KAFKA-10199 which added these metrics.



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