Github user tgravescs commented on a diff in the pull request:
https://github.com/apache/spark/pull/3557#discussion_r21232550
--- Diff:
yarn/common/src/main/scala/org/apache/spark/scheduler/cluster/YarnClientSchedulerBackend.scala
---
@@ -79,11 +79,8 @@ private[spark] class YarnClientSchedulerBackend(
("--name", "SPARK_YARN_APP_NAME", "spark.app.name")
)
optionTuples.foreach { case (optionName, envVar, sparkProp) =>
- if (System.getenv(envVar) != null) {
--- End diff --
So this order was done on purpose. There were a few issues if they are the
other way.
See commit
https://github.com/apache/spark/commit/3f779d872d8459b262b3db9e4d12b011910b6ce9
and associated jira https://issues.apache.org/jira/browse/SPARK-1631.
cc @vanzin
I know this was brought up once before but I don't know if anyone fully
investigated to see if there is another solution
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