Github user viirya commented on a diff in the pull request:
https://github.com/apache/spark/pull/16499#discussion_r102376897
--- Diff: core/src/main/scala/org/apache/spark/storage/BlockManager.scala
---
@@ -813,7 +813,14 @@ private[spark] class BlockManager(
false
}
} else {
- memoryStore.putBytes(blockId, size, level.memoryMode, () =>
bytes)
+ val memoryMode = level.memoryMode
+ memoryStore.putBytes(blockId, size, memoryMode, () => {
+ if (memoryMode == MemoryMode.OFF_HEAP) {
--- End diff --
No. I meant do we actually need to defensive copy here? All usage of
`putBytes` across Spark have duplicated the byte buffer before passing it in.
Is there any missing case we should do this defensive copy?
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