Github user JeetKunDoug commented on a diff in the pull request: https://github.com/apache/spark/pull/21322#discussion_r188295537 --- Diff: core/src/main/scala/org/apache/spark/storage/memory/MemoryStore.scala --- @@ -384,15 +385,36 @@ private[spark] class MemoryStore( } } + private def maybeReleaseResources(entry: MemoryEntry[_]): Unit = { + entry match { + case SerializedMemoryEntry(buffer, _, _) => buffer.dispose() + case DeserializedMemoryEntry(objs: Array[Any], _, _) => maybeCloseValues(objs) --- End diff -- I wouldn't expect a never-deserialized Memory Entry to be closed, as it was never really instantiated to begin with - so if it _only_ lands on disk, I think that's reasonable (as the variable in question would never have had a chance to allocate anything either).
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