Github user rezasafi commented on a diff in the pull request:
https://github.com/apache/spark/pull/17035#discussion_r128637990
--- Diff:
sql/core/src/main/scala/org/apache/spark/sql/execution/datasources/FileScanRDD.scala
---
@@ -205,7 +208,13 @@ class FileScanRDD(
override protected def getPreferredLocations(split: RDDPartition):
Seq[String] = {
val files = split.asInstanceOf[FilePartition].files
-
+ if (files.size == 1) {
+ val cachedLocations =
files.head.cachedLocations.map(HDFSCacheTaskLocation(_).toString)
+ val nonCachedLocations = files.head.locations.filterNot { x =>
+ files.head.cachedLocations.contains(x)
+ }.map(HostTaskLocation(_).toString)
+ return cachedLocations ++ nonCachedLocations
--- End diff --
Is it possible to rewrite this to avoid using return? thanks.
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