[hibernate-issues] [Hibernate-JIRA] Commented: (HSEARCH-741) NPE using two fulltext filters, one of them matching nothing (some filters only)

NPE using two fulltext filters, one of them matching nothing (some filters only) -------------------------------------------------------------------------------- Key: HSEARCH-741 URL: http://opensource.atlassian.com/projects/hibernate/browse/HSEARCH-741 Project: Hibernate Search Issue Type: Bug Affects Versions: 3.1.0.GA, 3.1.1.GA, 3.2.0.Final, 3.2.1, 3.3.0.Final, 3.4.0.Final Reporter: Sanne Grinovero Assignee: Sanne Grinovero Fix For: 4.0.0.Alpha1 It seems that some filter implementations are allowed to return null instead of an empty iterator if they don't match any document. In this case if multiple filters are enabled, and they are eligible for bitset merging, and no matches where found, we get: {code}java.lang.NullPointerException org.hibernate.search.filter.AndDocIdSet.findFirstTargetPosition(AndDocIdSet.java:144) org.hibernate.search.filter.AndDocIdSet.makeDocIdSetOnAgreedBits(AndDocIdSet.java:89) org.hibernate.search.filter.AndDocIdSet.buildBitSet(AndDocIdSet.java:81) org.hibernate.search.filter.AndDocIdSet.iterator(AndDocIdSet.java:60) org.apache.lucene.search.IndexSearcher.searchWithFilter(IndexSearcher.java:550) org.apache.lucene.search.IndexSearcher.search(IndexSearcher.java:525) org.hibernate.search.query.engine.impl.QueryHits.updateTopDocs(QueryHits.java:219) org.hibernate.search.query.engine.impl.QueryHits.<init>(QueryHits.java:127) org.hibernate.search.query.engine.impl.HSQueryImpl.getQueryHits(HSQueryImpl.java:419) org.hibernate.search.query.engine.impl.HSQueryImpl.queryEntityInfos(HSQueryImpl.java:222) org.hibernate.search.query.hibernate.impl.FullTextQueryImpl.list(FullTextQueryImpl.java:206) com.example.dao.impl.DaoImpl.search(Unknown Source) ....{code}