Github user vanzin commented on a diff in the pull request:
https://github.com/apache/spark/pull/19631#discussion_r154403001
--- Diff: project/MimaExcludes.scala ---
@@ -36,6 +36,12 @@ object MimaExcludes {
// Exclude rules for 2.3.x
lazy val v23excludes = v22excludes ++ Seq(
+ // SPARK-22372: Make cluster submission use SparkApplication.
+
ProblemFilters.exclude[DirectMissingMethodProblem]("org.apache.spark.deploy.SparkHadoopUtil.getSecretKeyFromUserCredentials"),
--- End diff --
The change is 2.3 only.
I've always questioned why `SparkHadoopUtil` is public in the first place.
I'm not that worried about removing the functionality in this method because
Spark apps don't really need to depend on it; it's easy to call the Hadoop API
directly, and the API did nothing before except in YARN mode.
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