Github user ehnalis commented on a diff in the pull request:
https://github.com/apache/spark/pull/6083#discussion_r30178058
--- Diff: core/src/main/scala/org/apache/spark/SparkConf.scala ---
@@ -448,6 +448,15 @@ class SparkConf(loadDefaults: Boolean) extends
Cloneable with Logging {
}
}
}
+
+ // System property spark.yarn.app.id must be set if user code ran by
AM on a YARN cluster
+ // yarn-standalone is deprecated, but still supported
+ if ((get("spark.master") == "yarn-cluster" || get("spark.master") ==
"yarn-standalone") &&
--- End diff --
What we do here is actually an act of validating the configuration. It
seems to be a good place inside `validateSettings`. There are no information
required from outside to do this check.
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