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https://issues.apache.org/jira/browse/FLINK-36172?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17928370#comment-17928370
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Junrui Lee commented on FLINK-36172:
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Gentle ping [~Zhanghao Chen] on this issue.
> Web UI Freezes When There Are Many Finished Tasks in Batch Jobs
> ---------------------------------------------------------------
>
> Key: FLINK-36172
> URL: https://issues.apache.org/jira/browse/FLINK-36172
> Project: Flink
> Issue Type: Bug
> Components: Runtime / Metrics, Runtime / REST
> Reporter: Junrui Li
> Priority: Major
>
> When there are a large number of finished tasks in batch jobs, the web UI
> becomes unresponsive and often freezes, significantly impairing user
> experience. A flame graph analysis reveals that most CPU time is consumed in
> [{{MetricStore}}|https://github.com/apache/flink/blob/576ec2b9361a3f8d58fb22b998b0ca7c3c8cf10e/flink-runtime/src/main/java/org/apache/flink/runtime/rest/handler/legacy/metrics/MetricStore.java#L479],
> indicating a performance bottleneck.
> This issue appears to be an unexpected regression and should be addressed
> promptly.
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