Github user JoshRosen commented on a diff in the pull request:
https://github.com/apache/spark/pull/14871#discussion_r76714430
--- Diff:
core/src/main/scala/org/apache/spark/scheduler/TaskSchedulerImpl.scala ---
@@ -326,12 +323,19 @@ private[spark] class TaskSchedulerImpl(
// Take each TaskSet in our scheduling order, and then offer it each
node in increasing order
// of locality levels so that it gets a chance to launch local tasks
on all of them.
// NOTE: the preferredLocality order: PROCESS_LOCAL, NODE_LOCAL,
NO_PREF, RACK_LOCAL, ANY
- var launchedTask = false
- for (taskSet <- sortedTaskSets; maxLocality <-
taskSet.myLocalityLevels) {
- do {
- launchedTask = resourceOfferSingleTaskSet(
+ for (taskSet <- sortedTaskSets) {
+ var launchedAnyTask = false
+ var launchedTaskAtMaxLocality = false
--- End diff --
Good idea; updated.
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