Github user jerryshao commented on a diff in the pull request:
https://github.com/apache/spark/pull/6394#discussion_r34757572
--- Diff:
core/src/main/scala/org/apache/spark/ExecutorAllocationClient.scala ---
@@ -24,11 +24,15 @@ package org.apache.spark
private[spark] trait ExecutorAllocationClient {
/**
- * Express a preference to the cluster manager for a given total number
of executors.
+ * Express a preference to the cluster manager for a given total number
of executors,
+ * number of locality aware pending tasks and related locality
preferences.
* This can result in canceling pending requests or filing additional
requests.
* @return whether the request is acknowledged by the cluster manager.
*/
- private[spark] def requestTotalExecutors(numExecutors: Int): Boolean
+ private[spark] def requestTotalExecutors(
+ numExecutors: Int,
+ localityAwarePendingTasks: Int,
+ preferredLocalityToCount: Map[String, Int]): Boolean
--- End diff --
Actually I think the key string is hostname, not executor :).
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