Github user sryza commented on a diff in the pull request:
https://github.com/apache/spark/pull/6394#discussion_r31657904
--- Diff:
yarn/src/main/scala/org/apache/spark/deploy/yarn/YarnAllocator.scala ---
@@ -253,10 +269,26 @@ private[yarn] class YarnAllocator(
* added in recent versions.
*/
private def createContainerRequest(resource: Resource): ContainerRequest
= {
+ // filter nodes which don't have containers but node preference is
required.
+ val nodes = {
+ val unusedNodes = preferredNodeLocationToUses.filterKeys(_ ==
false).keys
+ if (unusedNodes.isEmpty) {
+ null
+ } else {
+ unusedNodes.toArray
+ }
+ }
+
+ val racks = if (preferredRackLocations.isEmpty) {
+ null
+ } else {
+ preferredRackLocations.toArray
+ }
+
nodeLabelConstructor.map { constructor =>
- constructor.newInstance(resource, null, null, RM_REQUEST_PRIORITY,
true: java.lang.Boolean,
+ constructor.newInstance(resource, nodes, racks, RM_REQUEST_PRIORITY,
true: java.lang.Boolean,
--- End diff --
Ah, that only applies when relax=false, which we never do.
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