Github user susanxhuynh commented on a diff in the pull request:
https://github.com/apache/spark/pull/19793#discussion_r153352098
--- Diff:
core/src/main/scala/org/apache/spark/deploy/rest/SubmitRestProtocolRequest.scala
---
@@ -46,6 +46,8 @@ private[rest] class CreateSubmissionRequest extends
SubmitRestProtocolRequest {
super.doValidate()
assert(sparkProperties != null, "No Spark properties set!")
assertFieldIsSet(appResource, "appResource")
+ assertFieldIsSet(appArgs, "appArgs")
+ assertFieldIsSet(environmentVariables, "environmentVariables")
--- End diff --
What if there are no args or environment variables for a particular job? Is
the caller expected to pass in an empty array?
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