Github user andrewor14 commented on a diff in the pull request:
https://github.com/apache/spark/pull/10346#discussion_r48087373
--- Diff: core/src/main/scala/org/apache/spark/storage/BlockManager.scala
---
@@ -578,9 +578,18 @@ private[spark] class BlockManager(
doGetRemote(blockId, asBlockResult =
false).asInstanceOf[Option[ByteBuffer]]
}
+ private def getLocations(blockId: BlockId): Seq[BlockManagerId] = {
+ // Since block managers can share an identical host, we put these
preferred
+ // locations first.
--- End diff --
I would move this to the java doc and rephrase it
```
/**
* Return a list of locations for the given block, prioritizing the local
machine since multiple
* block managers can share the same host.
*/
```
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