Github user markpavey commented on a diff in the pull request:
https://github.com/apache/spark/pull/23102#discussion_r236343483
--- Diff: core/src/main/scala/org/apache/spark/deploy/DependencyUtils.scala
---
@@ -61,11 +61,13 @@ private[deploy] object DependencyUtils extends Logging {
hadoopConf: Configuration,
secMgr: SecurityManager): String = {
val targetDir = Utils.createTempDir()
+ val fileSeparator = Pattern.quote(File.separator)
--- End diff --
The Java String.split method treats its parameter as a regular expression.
The File.separator is a single backslash '\' it throws a
PatternSyntaxException. Wrapping it in Pattern.quote ensures it is interpreted
as a literal value.
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