Github user nongli commented on a diff in the pull request:
https://github.com/apache/spark/pull/11012#discussion_r51628572
--- Diff: core/src/main/scala/org/apache/spark/storage/MemoryStore.scala ---
@@ -304,10 +309,9 @@ private[spark] class MemoryStore(blockManager:
BlockManager, memoryManager: Memo
// release the unroll memory yet. Instead, we transfer it to
pending unroll memory
// so `tryToPut` can further transfer it to normal storage
memory later.
// TODO: we can probably express this without pending unroll
memory (SPARK-10907)
- val amountToTransferToPending = currentUnrollMemoryForThisTask -
previousMemoryReserved
--- End diff --
This is the race you are addressing right? The issue is that
previousMemoryReserved is out of date.
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