Github user gpang commented on a diff in the pull request:
https://github.com/apache/spark/pull/18098#discussion_r118581400
--- Diff:
resource-managers/mesos/src/main/scala/org/apache/spark/scheduler/cluster/mesos/MesosCoarseGrainedSchedulerBackend.scala
---
@@ -393,7 +409,30 @@ private[spark] class
MesosCoarseGrainedSchedulerBackend(
val offerId = offer.getId.getValue
val resources = remainingResources(offerId)
- if (canLaunchTask(slaveId, resources)) {
+ var createTask = canLaunchTask(slaveId, resources)
+ if (hostToLocalTaskCount.nonEmpty) {
--- End diff --
I'm assuming that if `hostToLocalTaskCount` is not empty, there is locality
info. I did another check for the executors to launch.
I did move the logic out to `satisfiesLocality()` and removed redundant
executorLimit checks.
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