lrsb created FLINK-39890:
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Summary: Autoscaler crashes with NumberFormatException computing
observed scaling coefficient for idle vertices
Key: FLINK-39890
URL: https://issues.apache.org/jira/browse/FLINK-39890
Project: Flink
Issue Type: Bug
Components: Kubernetes Operator
Affects Versions: 1.15.0, 1.14.0, 1.13.0, 1.12.0
Reporter: lrsb
With job.autoscaler.observed-scalability.enabled: true, the autoscaler throws
NumberFormatException while computing the observed scaling coefficient for any
vertex with a zero true-processing-rate (idle / very low traffic). The exception
aborts the entire scaling pass, so *no* parallelism overrides / resource
requirements are applied and the job stays stuck at its deployed parallelism.
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