Github user JoshRosen commented on a diff in the pull request:
https://github.com/apache/spark/pull/11502#discussion_r54972981
--- Diff: core/src/main/scala/org/apache/spark/storage/BlockManager.scala
---
@@ -734,9 +740,9 @@ private[spark] class BlockManager(
* @param keepReadLock if true, this method will hold the read lock when
it returns (even if the
* block already exists). If false, this method will
hold no locks when it
* returns.
- * @return `Some(PutResult)` if the block did not exist and could not be
successfully cached,
- * or None if the block already existed or was successfully
stored (fully consuming
- * the input data / input iterator).
+ * @return `Some(Option[Iterator[Any])` if the block did not exist and
could not be successfully
--- End diff --
This will be much easier to clean up if we split the monolithic `doPut()`
into a `doPutBytes()` and `doPutIterator()`.
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