Github user mridulm commented on a diff in the pull request:
https://github.com/apache/spark/pull/17300#discussion_r107352668
--- Diff: core/src/main/scala/org/apache/spark/storage/BlockManager.scala
---
@@ -555,12 +555,15 @@ private[spark] class BlockManager(
/**
* Return a list of locations for the given block, prioritizing the
local machine since
- * multiple block managers can share the same host.
+ * multiple block managers can share the same host, then try to get the
same rack data.
--- End diff --
How about "then try to get the same rack data" -> "followed by hosts on the
same rack" ?
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