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https://issues.apache.org/jira/browse/FLINK-32199?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17726482#comment-17726482
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Junrui Li commented on FLINK-32199:
-----------------------------------
I've prepared a quick fix for it. Can you assign this ticket for
me?[~wanglijie] :)
> 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
> Priority: Major
> 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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