Lucene组合IKAnalyzer内存溢出

   public LuceneDomain searchIndex(String searchStr) throws Exception{
    	
        File indexDir = new File(PropertiesUtil.getPropertyValue(searchDirKEY)); 
        
        String[] fields=new String[]{"id","source","title","context","url"};
        //索引目录  
        Directory dir=FSDirectory.open(indexDir);  
        //根据索引目录创建读索引对象  
        IndexReader reader = IndexReader.open(dir);  
        //搜索对象创建  
        IndexSearcher searcher = new IndexSearcher(reader);  
        //IKAnalyzer中文分词  
        Analyzer analyzer = new IKAnalyzer();  
        //创建查询解析对象  
        //QueryParser parser = new QueryParser(Version.LUCENE_36,"context", analyzer);
        QueryParser parser = new MultiFieldQueryParser(Version.LUCENE_36,fields, analyzer);
        parser.setDefaultOperator(QueryParser.AND_OPERATOR);  
        //根据域和目标搜索文本创建查询器 
        //Query query = parser.parse(searchStr);
        Query query =IKQueryParser.parseMultiField(fields, searchStr);
        System.out.println("Searching for: " + query.toString("context"));  
        //对结果进行相似度打分排序  
        TopScoreDocCollector collector = TopScoreDocCollector.create(maxBufferedDocs,false);  
        searcher.search(query, collector);
        //获取结果  
        ScoreDoc[] hits = collector.topDocs().scoreDocs;  
  
        int numTotalHits = collector.getTotalHits();  
        LuceneDomain lucene=new LuceneDomain();
        lucene.setTotalNum(numTotalHits);
        lucene.setSearchText(searchStr);
        List<SearchDomain> searchList=new ArrayList<SearchDomain>();
        //显示搜索结果 
        SearchDomain search=null;
        for (int i = 0; i < hits.length; i++) {  
            search=new SearchDomain();
        	Document doc = searcher.doc(hits[i].doc);
//            String url = doc.get("url");