Github user kayousterhout commented on a diff in the pull request:
https://github.com/apache/spark/pull/900#discussion_r14205252
--- Diff:
yarn/stable/src/main/scala/org/apache/spark/deploy/yarn/ApplicationMaster.scala
---
@@ -164,6 +164,7 @@ class ApplicationMaster(args:
ApplicationMasterArguments, conf: Configuration,
private def startUserClass(): Thread = {
logInfo("Starting the user JAR in a separate Thread")
+ System.setProperty("spark.executor.instances",
args.numExecutors.toString)
--- End diff --
Why do you need to set this here? Is this for the case when
args.numExecutors was set by SPARK_EXECUTOR_INSTANCES (since otherwise it seems
like spark.executor.instances will already be set, right)?
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