Github user mateiz commented on the pull request:
https://github.com/apache/spark/pull/1313#issuecomment-49206624
By the way, as far as I can tell, findSpeculativeTask also takes a locality
level as an argument, and doesn't return tasks that are farther away than that.
Do we need to change it? It seems that it shouldn't interfere with other tasks.
It's true that we might launch a node-local speculative task before a
rack-local non-speculative task, but I think it's unlikely that we'll be
wanting to speculate stuff at that point, so I'm not sure this is a problem.
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