[jira] [Created] (FLINK-37872) Autoscaler computes negative true processing rate

[Sai Sharath Dandi (Jira)]

Sai Sharath Dandi created FLINK-37872:
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             Summary: Autoscaler computes negative true processing rate
                 Key: FLINK-37872
                 URL: https://issues.apache.org/jira/browse/FLINK-37872
             Project: Flink
          Issue Type: Bug
          Components: Autoscaler
            Reporter: Sai Sharath Dandi
         Attachments: Screenshot 2025-05-29 at 3.26.31 PM.png

After a scale up/down, autoscaler measures the true processing rate via busy 
time metrics to be negative as it uses num-records-in metric before the scale 
up/down - 
[https://github.com/apache/flink-kubernetes-operator/blob/main/flink-autoscaler/src/main/java/org/apache/flink/autoscaler/ScalingMetricEvaluator.java#L459]

 

We need to find the first metric after the last scaling action instead to 
compute the true processing rate

 

!Screenshot 2025-05-29 at 3.26.31 PM.png!



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