Re: a few issues with 2.4.1 RC3

[Andi Vajda]

On Fri, 13 Mar 2009, Michael McCandless wrote:

* I'm attempting to re-use a field, by changing its value, and then
  adding the document to an index:

      lucene.initVM(lucene.CLASSPATH)

      writer = lucene.IndexWriter(lucene.RAMDirectory(),
                                  lucene.StandardAnalyzer())
      doc = lucene.Document()

field = lucene.Field('field', '', lucene.Field.Store.NO, lucene.Field.Index.NOT_ANALYZED)

      field.setValue('abc')
      doc.add(field)
      writer.addDocument(doc)
      writer.close()

   However, unexpectedly I hit a Java NullPointerException in the
   writer.addDocument.  I hit a different exception if I use
   lucene.Field.Index.ANALYZED instead.  The corresponding code in
   Lucene should work fine I think.

Two bugs at work here:

  1. Because of the order in which the wrappers for setValue() were
     generated and because JCC let's you pass a python string for a Java
     byte array (I should probably remove that since JArray('byte')([...])
     is the way to do this now), your setValue('abc') call gets passed to
     the Java Field.setValue(byte[]) overload.

  2. Because of a probable Java Lucene bug, that fails to take and a
     NullPointerException is thrown during indexing.

The following Java code illustrates the error:


import java.io.IOException;

import org.apache.lucene.index.IndexWriter;
import org.apache.lucene.store.RAMDirectory;
import org.apache.lucene.analysis.standard.StandardAnalyzer;
import org.apache.lucene.document.Document;
import org.apache.lucene.document.Field;


public class t02 {
    public static void main(String[] args)
        throws IOException
    {
        IndexWriter writer = new IndexWriter(new RAMDirectory(),
                                             new StandardAnalyzer());
        Document doc = new Document();
        Field field = new Field("field", "",
                                Field.Store.NO,
                                Field.Index.NOT_ANALYZED);
        field.setValue(new byte[] { 'a', 'b', 'c' });
        doc.add(field);
        writer.addDocument(doc);
        writer.close();

        System.err.println("done");
    }
}


Mike, what do you think ?

Andi..