Github user srowen commented on a diff in the pull request:
https://github.com/apache/spark/pull/22849#discussion_r228936286
--- Diff:
core/src/main/scala/org/apache/spark/scheduler/cluster/CoarseGrainedSchedulerBackend.scala
---
@@ -240,7 +240,7 @@ class CoarseGrainedSchedulerBackend(scheduler:
TaskSchedulerImpl, val rpcEnv: Rp
val taskDescs = CoarseGrainedSchedulerBackend.this.synchronized {
// Filter out executors under killing
val activeExecutors = executorDataMap.filterKeys(executorIsAlive)
- val workOffers = activeExecutors.map {
+ val workOffers = activeExecutors.filter(_._2.freeCores > 0).map {
--- End diff --
I'm saying there is a comment a few lines above that describes this as a
fake offer that explicitly intends to contact all executors. I think we need to
figure out if that's still relevant. I don't have git in front of me but check
git blame or GitHub to see when this was written?
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