Junrui Li created FLINK-32199:
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Summary: MetricStore does not remove metrics of nonexistent
parallelism in TaskMetricStore when scale down job parallelism
Key: FLINK-32199
URL: https://issues.apache.org/jira/browse/FLINK-32199
Project: Flink
Issue Type: Bug
Components: Runtime / Metrics
Affects Versions: 1.17.0
Reporter: Junrui Li
Fix For: 1.16.3, 1.17.2
After FLINK-29615, FLINK will update the subtask metrics store when scaling
down parallelism. However, task metrics are added in the form of "subtaskIndex
+ metric.name" or "subtaskIndex + operatorName + metric.name". Users will be
able to find many redundant metrics through JobVertexMetricsHandler, which will
be very troublesome for users.
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