Github user markhamstra commented on the issue:

    https://github.com/apache/spark/pull/17297
  
    Agreed. Let's establish what we want to do before trying to discuss the
    details of how we are going to do it.
    
    On Tue, Mar 28, 2017 at 8:17 AM, Imran Rashid <notificati...@github.com>
    wrote:
    
    > @sitalkedia <https://github.com/sitalkedia> This change is pretty
    > contentious, there are lot of questions about whether or not this is a 
good
    > change. I don't think discussing this here in github comments on a PR is
    > the best form. I think of PR comments as being more about code details --
    > clarity, tests, whether the implementation is correct, etc. But here we're
    > discussing whether the behavior is even desirable, as well as trying to
    > discuss this in relation to other changes. I think a better format would 
be
    > for you to open a jira and submit a design document (maybe a shared google
    > doc at first), where we can focus more on the desired behavior and 
consider
    > all the changes, even if the PRs are smaller to make them easier to 
review.
    >
    > I'm explicitly *not* making a judgement on whether or not this is a good
    > change. Also I do appreciate you having the code changes ready, as a POC,
    > as that can help folks consider the complexity of the change. But it seems
    > clear to me that first we need to come to a decision about the end goal.
    >
    > Also, assuming we do decide this is desirable behavior, there is also a
    > question about how we can get changes like this in without risking 
breaking
    > things -- I have started a thread on dev@ related to that topic in
    > general, but we should figure that for these changes in particular as 
well.
    >
    > @kayousterhout <https://github.com/kayousterhout> @tgravescs
    > <https://github.com/tgravescs> @markhamstra
    > <https://github.com/markhamstra> makes sense?
    >
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