Shuffle biased task scheduling #447
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rynorris
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lwwmanning
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robert3005
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core/src/test/scala/org/apache/spark/scheduler/TaskSchedulerImplSuite.scala
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Another optimization to the work begun in #427
When scheduling tasks, bias towards putting them on executors which hold active shuffle data, so we are more likely to be able to remove executors that don't.
This code is taken from the original PR and re-introduced here as a separate PR.
Still needs to be live-tested.