2 Replies Latest reply on Dec 14, 2006 5:14 AM by Jan Francsi

    Portlet using lucene gives ArrayIndexOutOfBoundsException

    Jan Francsi Newbie


      I've buld a Portlet using the apache lucene API to search our website.

      Indexing will be performed as a job in java (works fine).

      My portlet is using the following method to do a simple search:

      private static List sucheSchlagwort(String queries)throws Exception{
       String index = "index";
       String field = "contents";
       int repeat = 0;
       boolean raw = false;
       String normsField = null;
       IndexReader reader = IndexReader.open(index);
       if (normsField != null)
       reader = new OneNormsReader(reader, normsField);
       Searcher searcher = new IndexSearcher(reader);
       Analyzer analyzer = new StandardAnalyzer();
       BufferedReader in = null;
       // in = new BufferedReader(new FileReader(queries));
       QueryParser parser = new QueryParser(field, analyzer);
       List alleErgebnisse = new ArrayList();
       String line = queries; // in.readLine();
       Query query = parser.parse(line);
       Hits hits = searcher.search(query);
       // ANFANG
       // FIXME: Ausgabe ins Ausgabeportlet, nicht println
       for (int i = 0; i < hits.length(); i++) {
       Ergebnis ergebnis = new Ergebnis();
       Document doc = hits.doc(i);
       String path = doc.get("path");
       if (path != null) {
       String title = doc.get("title");
       if (title != null) {
       } else {
       ergebnis.setLink("Kein Link zu diesem Dokument vorhanden");
       if (queries != null) // non-interactive
       // ENDE
       return alleErgebnisse;

      Implementet into a simple java class it works fine on shell. Started as part of my portlet, it sends me the following error:

      2006-12-08 12:34:42,393 ERROR [STDERR] java.lang.ArrayIndexOutOfBoundsException: -1
      2006-12-08 12:34:42,393 ERROR [STDERR] at java.util.ArrayList.get(ArrayList.java:323)
      2006-12-08 12:34:42,413 ERROR [STDERR] at org.apache.lucene.index.IndexReader.open(IndexReader.java:95)
      2006-12-08 12:34:42,413 ERROR [STDERR] at SuchportletPortlet.sucheSchlagwort(SuchportletPortlet.java:54)

      Looks like it comes from here:
      IndexReader reader = IndexReader.open(index);

      Changing the index to a non existing path sends an error that the path is not existing. So there must be a problem with reading the index. Don't you think?
      What about the read/write permissions under the JBOSS directory?
      And remember... in a standard java program it works...