Hardy Ferentschik commented on an issue
Hibernate Search / Bug HSEARCH-1290
Search with bool, must, onFields and matching returned duplicate records
With the following search test:

{code}
QueryBuilder qb = fullTextEntityManager.getSearchFactory().buildQueryBuilder().forEntity( ProductArticle.class ).get();
        System.out.println(" passing 2 ....");
        org.apache.lucene.search.Query query = qb
                                .bool()
                                .must(qb.keyword().on...