Github user mridulm commented on a diff in the pull request:
https://github.com/apache/spark/pull/636#discussion_r12380632
--- Diff: core/src/main/scala/org/apache/spark/deploy/master/Master.scala
---
@@ -523,6 +504,90 @@ private[spark] class Master(
}
}
+ private def startMultiExecutorsPerWorker() {
+ // allow user to run multiple executors in the same worker
+ // (within the same worker JVM process)
+ if (spreadOutApps) {
+ for (app <- waitingApps if app.coresLeft > 0) {
+ val coreNumPerExecutor = app.desc.corePerExecutor
+ var usableWorkers = workers.toArray.filter(_.state ==
WorkerState.ALIVE)
+ .filter(_.coresFree > 0).sortBy(_.coresFree).reverse
--- End diff --
pull this outside the loop ?
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