Github user rxin commented on the pull request:
https://github.com/apache/spark/pull/1689#issuecomment-55797086
Yea I don't think we need to fully solve 3 here.
My main concern with these set of changes is 2, since a single badly
behaved RDD can potentially block the (unfortunately single threaded) scheduler
forever. Let me think about this a little bit and get back to you.
If you have an idea about how to fix that, feel free to suggest them.
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