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Posted to issues@flink.apache.org by "Junrui Li (Jira)" <ji...@apache.org> on 2024/08/29 06:18:00 UTC

[jira] [Created] (FLINK-36172) Web UI Freezes When There Are Many Finished Tasks in Batch Jobs

Junrui Li created FLINK-36172:
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             Summary: 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


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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