[jira] [Created] (SPARK-35637) 2 active tasks shown in Spark UI but executor core is 1 and task cpu is 1

["L. C. Hsieh (Jira)" <ji...@apache.org>]

L. C. Hsieh created SPARK-35637:
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             Summary: 2 active tasks shown in Spark UI but executor core is 1 and task cpu is 1
                 Key: SPARK-35637
                 URL: https://issues.apache.org/jira/browse/SPARK-35637
             Project: Spark
          Issue Type: Bug
          Components: Web UI
    Affects Versions: 3.0.2
            Reporter: L. C. Hsieh


We see an incorrect element on UI. We set executor core as 1, and task cpu as 1, but we sometimes see 2 active tasks for one executor in "Executors" tab on Spark UI.

It seems to be UI-only issue, because from the event timeline diagram, two tasks are not actually run at the same time. The second one begins to run after first one finishes.

Note that two tasks have very short duration 0.7s and 1s.

So it looks like there is a delay on UI to reflect correct active tasks.



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