Github user JoshRosen commented on a diff in the pull request:
https://github.com/apache/spark/pull/4135#discussion_r28022977
--- Diff: core/src/main/scala/org/apache/spark/TaskContext.scala ---
@@ -106,6 +105,20 @@ abstract class TaskContext extends Serializable {
def addOnCompleteCallback(f: () => Unit)
/**
+ * Add a (Java friendly) listener to be executed on task interruption.
We add this
+ * listener for some more clean works. An example use is to stop
`receiver supervisor`
+ * properly.
+ */
+ def addTaskInterruptionListener(listener: TaskInterruptionListener):
TaskContext
+
+ /**
+ * Add a listener in the form of a Scala closure to be executed on task
interruption.
+ * We add this listener for some more clean works. An example use is to
stop `receiver
--- End diff --
I'd reword this slightly to be a bit more explicit:
> Add a listener in the form of a Scala closure to be executed on task
interruption. An example use is to cleanly shut down long-running receiver
tasks in Spark Streaming.
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