java - for - SpanFirstQuery no funciona en lucene

lucene for java

Question

SpanFirstQuery usar SpanFirstQuery para SpanFirstQuery comienzo de un campo en lucene. Pero simplemente no parece funcionar. aquí está el código que estoy usando.

Map<String, Analyzer> searchAnalyzers = new HashMap<String, Analyzer>();
searchAnalyzers.put(NAME, new KeywordAnalyzer());
searchAnalyzers.put(ORGANIZATION_NAME, new KeywordAnalyzer());
searchAnalyzers.put(ORGANIZATION_POSITION, new KeywordAnalyzer());
PerFieldAnalyzerWrapper perFieldAnalyzerWrapper = new PerFieldAnalyzerWrapper(new KeywordAnalyzer(), searchAnalyzers);
MultiFieldQueryParser multiFieldQueryParser = new MultiFieldQueryParser(Version.LUCENE_40, mSearchFields, perFieldAnalyzerWrapper); //mSearchFiels is array of fiels
multiFieldQueryParser.setDefaultOperator(QueryParser.Operator.AND);
Query query = (Utils.isEmpty(queryString)) ? new MatchAllDocsQuery() : multiFieldQueryParser.parse(QueryParser.escape(queryString)); //queryString is text to be searched

Term term = new Term(NAME, queryString);
SpanFirstQuery spanFirstQuery = new SpanFirstQuery(new SpanTermQuery(term), 5);
spanFirstQuery.setBoost(5.0f);
BooleanQuery booleanQuery = new BooleanQuery();
booleanQuery.add(spanFirstQuery, BooleanClause.Occur.SHOULD);
booleanQuery.add(query, BooleanClause.Occur.MUST);
indexSearcher.search(booleanQuery, 100);

devuelve resultados cuando solo se pasa un solo carácter en queryString . pero no funciona cuando paso cadena. siempre totalHits count es 0.