Github user vanzin commented on a diff in the pull request:
https://github.com/apache/spark/pull/9991#discussion_r46086313
--- Diff: core/src/main/scala/org/apache/spark/SparkContext.scala ---
@@ -1764,6 +1773,7 @@ class SparkContext(config: SparkConf) extends Logging
with ExecutorAllocationCli
// Unset YARN mode system env variable, to allow switching between
cluster types.
System.clearProperty("SPARK_YARN_MODE")
SparkContext.clearActiveContext()
+ _stopHooks.foreach(_())
--- End diff --
I'm not a big fan of adding more hooks, but since SQLContext doesn't have a
`stop` method... anyway, probably good to wrap calls to the hooks with
`Utils.tryLogNonFatalError`.
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