Github user vanzin commented on the pull request:
https://github.com/apache/spark/pull/8109#issuecomment-130104906
The original reason (from what I remember) to hide this under the Utils
class was to avoid exposing the `ShutdownHookManager`, which clashes with a
Hadoop class with the same name (different package though). I guess since Spark
code should not use the Hadoop one, it's ok to use the same name.
The change looks ok, but let's see what tests say.
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