Github user squito commented on the pull request:
https://github.com/apache/spark/pull/3798#issuecomment-71577982
@koeninger
I doubt that we want to go this route in this case, but just in case you're
interested, I think a much better way to handle multiple errors gracefully is
with [scalactic's `Or`](http://www.scalactic.org/user_guide/OrAndEvery). Its
much better than `Either` for this case of building up a set of errors to
report back to the user. And scalactic is a nicely designed, small library
(eg. you're not pulling scalaz). Probably not worth it for this one case, but
thought you might find it interesting :)
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