Github user vanzin commented on a diff in the pull request:
https://github.com/apache/spark/pull/6394#discussion_r31572195
--- Diff:
yarn/src/main/scala/org/apache/spark/deploy/yarn/YarnAllocator.scala ---
@@ -427,11 +474,25 @@ private[yarn] class YarnAllocator(
containerSet.remove(containerId)
if (containerSet.isEmpty) {
allocatedHostToContainersMap.remove(host)
+ // If all the containers of this node are removed, remove this
preferred location,
+ // since it means currently we don't need to this node locality.
+ preferredNodeLocationToUses.remove(host)
} else {
allocatedHostToContainersMap.update(host, containerSet)
}
allocatedContainerToHostMap.remove(containerId)
+
+ // If current there's no container allocated on this rack, remove
it,
+ // since we don't need this rack currently.
+ val remainingRacks = allocatedHostToContainersMap.keys.map { h =>
+ RackResolver.resolve(conf, h).getNetworkLocation
+ }.toSet
+ remainingRacks.foreach { rack =>
+ if (!preferredRackLocations.contains(rack)) {
+ preferredRackLocations.remove(rack)
--- End diff --
Hmm, this looks wrong? It's not doing anything currently, given the
condition.
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