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https://issues.apache.org/jira/browse/SPARK-5388?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14309825#comment-14309825
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Patrick Wendell commented on SPARK-5388:
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One the boolean and numeric values. I don't mind one way or the other how they 
are handled programmatically (since we are not exposing this). However, it does 
seem weird that in the wire protocol defines these as string types. I looked at 
a few other API's, Github, Twitter, etc and they all use proper boolean types. 
So I'd definitely recommend setting them as proper types in the JSON, and if 
that's easier to do by making them nullable Boolean and Long values, seems like 
a good approach.

> Provide a stable application submission gateway in standalone cluster mode
> --------------------------------------------------------------------------
>
>                 Key: SPARK-5388
>                 URL: https://issues.apache.org/jira/browse/SPARK-5388
>             Project: Spark
>          Issue Type: Bug
>          Components: Spark Core
>    Affects Versions: 1.2.0
>            Reporter: Andrew Or
>            Assignee: Andrew Or
>            Priority: Blocker
>         Attachments: stable-spark-submit-in-standalone-mode-2-4-15.pdf
>
>
> The existing submission gateway in standalone mode is not compatible across 
> Spark versions. If you have a newer version of Spark submitting to an older 
> version of the standalone Master, it is currently not guaranteed to work. The 
> goal is to provide a stable REST interface to replace this channel.
> For more detail, please see the most recent design doc attached.



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