LuceneでMoreLikeThisがうまくいかない(いった)

C:\Lucene\files\にTwitterのユーザー名.txtがあり、TwitetrのPOSTが1行に1つ
C:\Lucene\indexにindexを作成済み

1つのユーザー名.txtから類似したユーザー名.txtを探す

import java.io.File;
import java.io.IOException;
import java.io.Reader;
import java.io.StringReader;
import org.apache.jackrabbit.core.query.lucene.MoreLikeThis;
import org.apache.lucene.analysis.Analyzer;
import org.apache.lucene.analysis.ja.JapaneseAnalyzer;
import org.apache.lucene.document.Document;
import org.apache.lucene.index.CorruptIndexException;
import org.apache.lucene.index.IndexReader;
import org.apache.lucene.queryParser.ParseException;
import org.apache.lucene.search.IndexSearcher;
import org.apache.lucene.search.Query;
import org.apache.lucene.search.ScoreDoc;
import org.apache.lucene.search.TopDocs;
import org.apache.lucene.store.Directory;
import org.apache.lucene.store.RAMDirectory;
class SearchJFilesFromDoc {
	public static void main(String[] args) throws CorruptIndexException, IOException, ParseException {
		System.setProperty("sen.home", "D:\\Software\\java\\sen");
		String index = "C:\\Lucene\\index";
		Directory dir = new RAMDirectory(new File(index));
		IndexReader reader = IndexReader.open(dir);
		IndexSearcher searcher = new IndexSearcher(dir);
		MoreLikeThis mlt = new MoreLikeThis(reader);
		Analyzer analyzer = new JapaneseAnalyzer();
		mlt.setAnalyzer(analyzer);
		String user = "snkken";
		String userTweet = "C:\\Lucene\\files\\" + user + ".txt";
		Reader target = new StringReader(userTweet);
		Query query = mlt.like(target);
		System.out.println("Searching for: " + query.toString("contents"));
		TopDocs docs = searcher.search(query, 10);
		for (ScoreDoc scoreDoc : docs.scoreDocs) {
			int docId = scoreDoc.doc;
			Document doc = searcher.doc(docId);
			System.out.println("path" + doc.get("path"));
		}
		searcher.close();
	}
}

実行結果

log4j:WARN No appenders could be found for logger (net.java.sen.Dictionary).
log4j:WARN Please initialize the log4j system properly.
Searching for: 

研究室の仲間の協力を得て無事動作！

		Query query = mlt.like(new BufferedReader(new InputStreamReader(new FileInputStream(userTweet), "SJIS")));
//		Reader target = new StringReader(userTweet);
//		FileInputStream fis = new FileInputStream(target);
//		Query query = mlt.like(target);

log4j:WARN No appenders could be found for logger (net.java.sen.Dictionary).
log4j:WARN Please initialize the log4j system properly.
Searching for: あめ kt スクレ の ロイド 帽子 じょ クーラ 赤い w だ 人 カ ええ は 数 ー に た トランスフォーマ て 明日 さん も ない
pathC:\Lucene\files\snkken.txt
その他結果