Github user vanzin commented on a diff in the pull request:

    https://github.com/apache/spark/pull/18235#discussion_r122503215
  
    --- Diff: core/src/main/scala/org/apache/spark/deploy/SparkSubmit.scala ---
    @@ -858,19 +844,33 @@ object SparkSubmit extends CommandLineUtils {
         require(path != null, "path cannot be null.")
         val uri = Utils.resolveURI(path)
         uri.getScheme match {
    -      case "file" | "local" =>
    -        path
    -
    +      case "file" | "local" => path
    +      case "https" | "http" | "ftp" => path
           case _ =>
             val fs = FileSystem.get(uri, hadoopConf)
    -        val tmpFile = new File(Files.createTempDirectory("tmp").toFile, 
uri.getPath)
    +        val tmpFile = new File(Files.createTempDirectory("tmp").toFile, 
new Path(uri).getName)
             // scalastyle:off println
             printStream.println(s"Downloading ${uri.toString} to 
${tmpFile.getAbsolutePath}.")
             // scalastyle:on println
             fs.copyToLocalFile(new Path(uri), new 
Path(tmpFile.getAbsolutePath))
             Utils.resolveURI(tmpFile.getAbsolutePath).toString
         }
       }
    +
    +  private def resolveGlobPaths(paths: String, hadoopConf: 
HadoopConfiguration): String = {
    +    require(paths != null, "paths cannot be null.")
    +    paths.split(",").filter(_.trim.nonEmpty).flatMap { path =>
    --- End diff --
    
    minor, but you should actually trim the strings, not just for filtering 
purposes.


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