Github user shivaram commented on a diff in the pull request:
https://github.com/apache/spark/pull/2922#discussion_r19373771
--- Diff: core/src/main/scala/org/apache/spark/broadcast/Broadcast.scala ---
@@ -60,6 +62,8 @@ abstract class Broadcast[T: ClassTag](val id: Long)
extends Serializable {
*/
@volatile private var _isValid = true
+ private var _destroySite = ""
--- End diff --
@pwendell requested this in the JIRA -- The main reason is that we'd like
to make it easy to debug if users call `destroy` by mistake.
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