Github user vanzin commented on the pull request:
https://github.com/apache/spark/pull/5085#issuecomment-84142521
> Is there an end-user problem that hasn't been voiced yet?
No, but there is an end-user issue that has been voice already: it can
break launching jobs after you build spark with sbt (e.g. `sbt package
assembly`). That's why the old scripts also had the same naming restriction.
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