code: public static List<String> getQueries(Configuration conf) throws IOException {
      return Preconditions.checkNotNull(HadoopUtils.readStringListFromConfAsBase64(QUERIES_KEY, conf),
        "You must call LuceneIndexInputFormat.setQueries()");
    }
docs: Get the queries to run over the indexes
  These are the queries in the same form as they were passed to {@link #setQueries} above
  
  @param conf job conf
  @return queries as passed to {@link #setQueries}
  @throws IOException