Github user JoshRosen commented on a diff in the pull request:
https://github.com/apache/spark/pull/9991#discussion_r46206482
--- Diff: core/src/main/scala/org/apache/spark/SparkContext.scala ---
@@ -1619,6 +1620,14 @@ class SparkContext(config: SparkConf) extends
Logging with ExecutorAllocationCli
}
/**
+ * Adds a stop hook which can be used to clean up additional resource.
This is called when the
+ * sparkContext is being stopped.
+ */
+ private[spark] def addStopHook(hook: () => Unit): Unit = {
--- End diff --
Does this method (or the collection that it manipulates) need to be
synchronized in order to guard against race conditions?
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