public static Path getHFileFromBackReference(final Configuration conf, final Path linkRefPath)
    throws IOException {
    return getHFileFromBackReference(CommonFSUtils.getRootDir(conf), linkRefPath);
  }
Get the full path of the HFile referenced by the back reference
@param conf        {@link Configuration} to read for the archive directory name
@param linkRefPath Link Back Reference path
@return full path of the referenced hfile
@throws IOException on unexpected error.
hbase-server/src/main/java/org/apache/hadoop/hbase/io/HFileLink.java