Github user cloud-fan commented on a diff in the pull request:
https://github.com/apache/spark/pull/20183#discussion_r161157178
--- Diff:
core/src/main/scala/org/apache/spark/broadcast/BroadcastManager.scala ---
@@ -52,6 +54,10 @@ private[spark] class BroadcastManager(
private val nextBroadcastId = new AtomicLong(0)
+ private[broadcast] val cachedValues = {
+ new ReferenceMap(AbstractReferenceMap.HARD, AbstractReferenceMap.WEAK)
--- End diff --
`can remove mappings...` That why I say entries can be removed
automatically.
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