Github user mateiz commented on the pull request:
https://github.com/apache/spark/pull/1313#issuecomment-51108988
> e.g. when there are some process-local tasks, node-local tasks, and
nopref tasks, node-local ones may not be able to run due to the delay
scheduling, so it will go forward to check nopref tasks, then we break the rule
that nodeLocal is always prior to nopref
Okay, but actually when there are only node-local and no-pref, the
node-local ones should run right away, right? That's what I suggested earlier.
I said that we don't need to care as much about the process + node + no-pref
case. Is this what happens now, or is there still a delay for this case?
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