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https://issues.apache.org/jira/browse/SPARK-31967?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Gengliang Wang resolved SPARK-31967.
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Resolution: Fixed
> Loading jobs UI page takes 40 seconds
> -------------------------------------
>
> Key: SPARK-31967
> URL: https://issues.apache.org/jira/browse/SPARK-31967
> Project: Spark
> Issue Type: Bug
> Components: Web UI
> Affects Versions: 3.0.1
> Reporter: Gengliang Wang
> Assignee: Gengliang Wang
> Priority: Blocker
> Attachments: load_time.jpeg, profile.png
>
>
> In the latest master branch, I find that the job list page becomes very slow.
> To reproduce in local setup:
> {code:java}
> spark.read.parquet("/tmp/p1").createOrReplaceTempView("t1")
> spark.read.parquet("/tmp/p2").createOrReplaceTempView("t2")
> (1 to 1000).map(_ => spark.sql("select * from t1, t2 where
> t1.value=t2.value").show())
> {code}
> And that, open live UI: http://localhost:4040/
> The loading time is about 40 seconds.
> If we comment out the function call for `drawApplicationTimeline`, then the
> loading time is around 1 second.
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