@Override
  public FileSystem getNonCachedFileSystem(URI uri, Configuration conf) throws IOException {
    return FileSystem.newInstance(uri, conf);
  }
Proxy file system also needs to override the access() method behavior.
Cannot add Override annotation since FileSystem.access() may not exist in
the version of hadoop used to build Hive.
shims/0.23/src/main/java/org/apache/hadoop/hive/shims/Hadoop23Shims.java