When the term of more than 16, highlight the query does not return

static final int BOOLEAN_REWRITE_TERM_COUNT_THRESHOLD = 16;

public Query rewrite(IndexReader reader) throws IOException {
    final int threshold = Math.min(BOOLEAN_REWRITE_TERM_COUNT_THRESHOLD, BooleanQuery.getMaxClauseCount());
    if (termData.size() <= threshold) {
      BooleanQuery.Builder bq = new BooleanQuery.Builder();
      TermIterator iterator = termData.iterator();
      for (BytesRef term = iterator.next(); term != null; term = iterator.next()) {
        bq.add(new TermQuery(new Term(iterator.field(), BytesRef.deepCopyOf(term))), Occur.SHOULD);
      }
      return new ConstantScoreQuery(bq.build());
    }
    return super.rewrite(reader);
  }

public Weight createWeight(IndexSearcher searcher, boolean needsScores, float boost) throws IOException {
    return new ConstantScoreWeight(this, boost) {

      @Override
      public void extractTerms(Set<Term> terms) {
        // no-op
        // This query is for abuse cases when the number of terms is too high to
        // run efficiently as a BooleanQuery. So likewise we hide its terms in
        // order to protect highlighters
      }

      ......
  }