Github user aarondav commented on a diff in the pull request:
https://github.com/apache/spark/pull/3293#discussion_r20419311
--- Diff: core/src/main/scala/org/apache/spark/util/Utils.scala ---
@@ -759,18 +759,9 @@ private[spark] object Utils extends Logging {
if (file != null) {
try {
if (file.isDirectory && !isSymlink(file)) {
- var savedIOException: IOException = null
- for (child <- listFilesSafely(file)) {
- try {
- deleteRecursively(child)
- } catch {
- // In case of multiple exceptions, only last one will be
thrown
- case ioe: IOException => savedIOException = ioe
- }
- }
- if (savedIOException != null) {
- throw savedIOException
- }
+ listFilesSafely(file).map(child =>
Try(deleteRecursively(child))).
--- End diff --
Your point about the for comprehension is incorrect in that, without a
`yield`, it actually turns into a foreach, which expands lazy iterators:
`for (i <- Iterator(1, 2,3) { println(i) }`
works as expected.
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