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Posted to issues@spark.apache.org by "Stephen Boesch (JIRA)" <ji...@apache.org> on 2016/05/15 20:51:12 UTC

[jira] [Commented] (SPARK-4924) Factor out code to launch Spark applications into a separate library

    [ https://issues.apache.org/jira/browse/SPARK-4924?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15283962#comment-15283962 ] 

Stephen Boesch commented on SPARK-4924:
---------------------------------------

Chiming in here as well: three of us are now asking for commentary / pointers to the following:

*  What capabilities have been added to the spark api
* How do we use them
* Any examples / other relevant documentation and/or code

Just saying "read the documentation" is not acceptable guidance for how to use these added features.

> Factor out code to launch Spark applications into a separate library
> --------------------------------------------------------------------
>
>                 Key: SPARK-4924
>                 URL: https://issues.apache.org/jira/browse/SPARK-4924
>             Project: Spark
>          Issue Type: Improvement
>          Components: Spark Core
>    Affects Versions: 1.0.0
>            Reporter: Marcelo Vanzin
>            Assignee: Marcelo Vanzin
>             Fix For: 1.4.0
>
>         Attachments: spark-launcher.txt
>
>
> One of the questions we run into rather commonly is "how to start a Spark application from my Java/Scala program?". There currently isn't a good answer to that:
> - Instantiating SparkContext has limitations (e.g., you can only have one active context at the moment, plus you lose the ability to submit apps in cluster mode)
> - Calling SparkSubmit directly is doable but you lose a lot of the logic handled by the shell scripts
> - Calling the shell script directly is doable,  but sort of ugly from an API point of view.
> I think it would be nice to have a small library that handles that for users. On top of that, this library could be used by Spark itself to replace a lot of the code in the current shell scripts, which have a lot of duplication.



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