private static URI addArchiveToClassPathHelper(Path archive, Configuration conf)
      throws IOException {

    String classpath = conf.get("mapred.job.classpath.archives");

    // the scheme/authority use ':' as separator. put the unqualified path in classpath
    String archivePath = archive.toUri().getPath();

    conf.set(
        "mapred.job.classpath.archives",
        classpath == null
            ? archivePath
            : classpath + System.getProperty("path.separator") + archivePath);
    return archive.makeQualified(archive.getFileSystem(conf)).toUri();
  }
 /**
  * Delete a local path with asyncDiskService if available, or otherwise synchronously with local
  * file system.
  */
 private static void deleteLocalPath(
     MRAsyncDiskService asyncDiskService, LocalFileSystem fs, Path path) throws IOException {
   boolean deleted = false;
   if (asyncDiskService != null) {
     // Try to delete using asyncDiskService
     String localPathToDelete = path.toUri().getPath();
     deleted = asyncDiskService.moveAndDeleteAbsolutePath(localPathToDelete);
     if (!deleted) {
       LOG.warn(
           "Cannot find DistributedCache path "
               + localPathToDelete
               + " on any of the asyncDiskService volumes!");
     }
   }
   if (!deleted) {
     // If no asyncDiskService, we will delete the files synchronously
     fs.delete(path, true);
   }
   LOG.info("Deleted path " + path);
 }