Github user gpang commented on a diff in the pull request:
https://github.com/apache/spark/pull/18098#discussion_r118590493
--- Diff:
resource-managers/mesos/src/main/scala/org/apache/spark/scheduler/cluster/mesos/MesosCoarseGrainedSchedulerBackend.scala
---
@@ -502,6 +521,25 @@ private[spark] class
MesosCoarseGrainedSchedulerBackend(
)
}
+ private def satisfiesLocality(offerHostname: String): Boolean = {
+ if (hostToLocalTaskCount.nonEmpty) {
--- End diff --
I see what you mean. I wanted these semantics to only be in-effect if
location information is available. If there is no location information, I don't
think there is a reason to wait for a delay.
So, the original semantics I wanted was, "If location information is
available, launch an executor on a host only when we have a task that wants to
be on that host, or the configurable delay has elapsed."
What should the semantics be?
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