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https://issues.apache.org/jira/browse/SPARK-5388?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14308635#comment-14308635
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Patrick Wendell commented on SPARK-5388:
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I think it's reasonable to use DELETE per [~tigerquoll]'s suggestion. It's not 
a perfect match with DELETE semantics, but I think it's fine to use it if it's 
not too much work. I also think calling it maxProtocolVersion is a good idea if 
those are indeed the semantics. For security, yeah the killing is the same as 
it is in the current mode, which is that there is no security. One thing we 
could do if there is user demand is add a flag that globally disables killing, 
but let's see if users request this first.

> 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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