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https://issues.apache.org/jira/browse/SPARK-4224?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15148796#comment-15148796
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Sean Owen commented on SPARK-4224:
----------------------------------

I'd encourage anyone to read 
http://www.joelonsoftware.com/items/2012/07/09.html starting especially around 
"feature backlogs". I think Spark suffers badly from this problem, since a lot 
of well-meaning contributors (this is not directed at you or anyone in 
particular) have never experienced this and tend to think filing JIRAs is 
actually a contribution in itself.

If something's on a to-do list that long, it's not that important, and by 
definition isn't really something worthy of a list of to-dos that you share and 
plan around. That is, if you (or anyone else) haven't bothered in 16 months, 
why now? I find keeping things open is merely seductive: maybe someone will 
work on it for us? we can't seriously not do this right? -- but is actually 
damaging. The flip side is: someone might take from this that group ACLs will 
be implemented, when evidence is that it will not be. It indicates someone 
should open a PR for it, when I don't know if anyone would review it.

I'd prefer to leave it, go investigate why it hasn't been prioritized, and then 
decide to prioritize it -- and then reopen it. But, this exchange is more than 
enough for the moment.

> Support group acls
> ------------------
>
>                 Key: SPARK-4224
>                 URL: https://issues.apache.org/jira/browse/SPARK-4224
>             Project: Spark
>          Issue Type: Improvement
>          Components: Spark Core
>    Affects Versions: 1.2.0
>            Reporter: Thomas Graves
>
> Currently we support view and modify acls but you have to specify a list of 
> users. It would be nice to also support groups, so that anyone in the group 
> has permissions.



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