[jira] [Created] (SPARK-39225) History Server initial scan may block new eventlog update

["Hai Tao (Jira)" <ji...@apache.org>]

Hai Tao created SPARK-39225:
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             Summary: History Server initial scan may block new eventlog update
                 Key: SPARK-39225
                 URL: https://issues.apache.org/jira/browse/SPARK-39225
             Project: Spark
          Issue Type: Improvement
          Components: Spark Core
    Affects Versions: 3.2.1, 3.1.2, 3.0.3
            Reporter: Hai Tao
             Fix For: 3.2.1, 3.1.2, 3.0.3


Current Spark History Server suffers when there are a large number of eventlog files under eventLog.dir: when a SHS starts, the initial scan may take a long time, and new eventlog files would not be scanned/parsed until the initial scan completes.

For example, if the initial scan takes 1-2 days(this is not uncommon in large environments), the newly finished spark jobs would not show up in SHS since their eventlog files are not scanned/parsed until the initial scan process finishes. This would result in a 1-2 days SHS malfunctioning since the newly finished spark jobs are most likely to be queried by users.



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