Github user JoshRosen commented on a diff in the pull request:
https://github.com/apache/spark/pull/10705#discussion_r53869169
--- Diff: core/src/main/scala/org/apache/spark/storage/BlockManager.scala
---
@@ -597,6 +586,9 @@ private[spark] class BlockManager(
/**
* Get a block from the block manager (either local or remote).
+ *
+ * This acquires a read lock on the block if the block was stored
locally and does not acquire
+ * any locks if the block was fetched from a remote block manager.
--- End diff --
This is no longer relevant after other changes.
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