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https://issues.apache.org/jira/browse/SPARK-14245?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15971337#comment-15971337
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Imran Rashid commented on SPARK-14245:
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Hi [~ajbozarth] [~tgraves] -- I was just taking a look at this b/c of a new pr 
to get the user added to the rest api: 
https://github.com/apache/spark/pull/17656

but one thing puzzled me about this.  Why is it using a different way of 
getting the user than the history server uses?  The HistoryServer takes the 
user from the SparkListenerApplicationStart event, which originates with 
[{{SparkContext.sparkUser}}|https://github.com/apache/spark/blob/master/core/src/main/scala/org/apache/spark/SparkContext.scala#L295].
  It seems like that is doing something slightly more general than just taking 
"user.name".  I haven't looked closely yet, but is there a reason to do one or 
the other?

> webUI should display the user
> -----------------------------
>
>                 Key: SPARK-14245
>                 URL: https://issues.apache.org/jira/browse/SPARK-14245
>             Project: Spark
>          Issue Type: Improvement
>          Components: Web UI
>    Affects Versions: 1.6.1
>            Reporter: Thomas Graves
>            Assignee: Alex Bozarth
>             Fix For: 2.0.0
>
>
> It would be nice if the Spark UI (both active and history) showed the user 
> who ran the application somewhere when you are in the application view.   
> Perhaps under the Jobs view by total uptime and scheduler mode.



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