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https://issues.apache.org/jira/browse/SPARK-3732?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14152308#comment-14152308
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Thomas Graves commented on SPARK-3732:
--------------------------------------

I think you should just change the name of this jira to add support for 
programmatically calling the spark yarn Client.  As you have found this isn't 
currently supported and I wouldn't want to just remove the exit and say its 
supported without thinking about other implications.   


> Yarn Client: Add option to NOT System.exit() at end of main()
> -------------------------------------------------------------
>
>                 Key: SPARK-3732
>                 URL: https://issues.apache.org/jira/browse/SPARK-3732
>             Project: Spark
>          Issue Type: Improvement
>    Affects Versions: 1.1.0
>            Reporter: Sotos Matzanas
>   Original Estimate: 1h
>  Remaining Estimate: 1h
>
> We would like to add the ability to create and submit Spark jobs 
> programmatically via Scala/Java. We have found a way to hack this and submit 
> jobs via Yarn, but since 
> org.apache.spark.deploy.yarn.Client.main()
> exits with either 0 or 1 in the end, this will mean exit of our own program. 
> We would like to add an optional spark conf param to NOT exit at the end of 
> the main



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