Github user advancedxy commented on the pull request:
https://github.com/apache/spark/pull/462#issuecomment-40930731
About the seed selection, maybe we should keep all the implementations in
sync.
That is to say: if we use system.nanotime in scala, we should use it in
java and python; if we use math.random, we should use it in java and python(or
port it to different languages).
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