LantaoJin commented on a change in pull request #23951:
[SPARK-13704][CORE][YARN] Re-implement RackResolver to reduce resolving time
URL: https://github.com/apache/spark/pull/23951#discussion_r266713384
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File path: core/src/main/scala/org/apache/spark/scheduler/TaskSetManager.scala
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@@ -250,8 +251,10 @@ private[spark] class TaskSetManager(
}
pendingTasksForHost.getOrElseUpdate(loc.host, new ArrayBuffer) += index
- initializingTaskArray match {
- case Some(array) => array += ((loc.host, index))
+ initializingHostToIndices match {
+ case Some(hostToIndices) =>
+ // when TaskSetManager initializing, preferredLocation -> task
indices
+ hostToIndices.getOrElseUpdate(loc.host, new ArrayBuffer) += index
Review comment:
Functionally it could be reused. But I won't suggest to do that. Considering
a corner case if a host name is same with its rack name.
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