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From "John Wang (JIRA)" <j...@apache.org>
Subject [jira] [Created] (LUCENE-3096) MultiSearcher does not work correctly with Not on NumericRange
Date Sat, 14 May 2011 05:10:47 GMT
MultiSearcher does not work correctly with Not on NumericRange
--------------------------------------------------------------

                 Key: LUCENE-3096
                 URL: https://issues.apache.org/jira/browse/LUCENE-3096
             Project: Lucene - Java
          Issue Type: Bug
          Components: Search
    Affects Versions: 3.0.2
            Reporter: John Wang


Hi, Keith

My colleague xiaoyang and I just confirmed that this is actually due to a lucene bug on Multisearcher.
In particular,

If we search with Not on NumericRange and we use MultiSearcher, we
will wrong search results (However, if we use IndexSearcher, the
result is correct).  Basically the NotOfNumericRange does not have
impact on multisearcher. We suspect it is because the createWeight()
function in MultiSearcher and hope you can help us to fix this bug of
lucene. I attached the code to reproduce this case. Please check it
out.

In the attached code, I have two separate functions :

(1) testNumericRangeSingleSearcher(Query query)
    where I create 6 documents, with a field called "id"= 1,2,3,4,5,6
respectively . Then I search by the query which is
    +MatchAllDocs -NumericRange(3,3). The expected result then should
be 5 hits since the document 3 is MUST_NOT.

(2) testNumericRangeMultiSearcher(Query query)
    where i create 2 RamDirectory(), each of which has 3 documents,
1,2,3; and 4,5,6. Then I search by the same query as above using
multiSearcher. The expected result should also be 5 hits.

However, from (1), we get 5 hits = expected results, while in (2) we
get 6 hits != expected results.

We also experimented this with our zoie/bobo open source tools and get
the same results because our multi-bobo-browser is built on
multi-searcher in lucene.


I already emailed the lucene community group. Hopefully we can get some feedback soon.
If you have any further concern, pls let me know! 

Thank you very much!


Code:  (based on lucene 3.0.x)



import java.io.IOException;
import java.io.PrintStream;
import java.text.DecimalFormat;

import org.apache.lucene.analysis.WhitespaceAnalyzer;

import org.apache.lucene.document.Document;
import org.apache.lucene.document.Field;
import org.apache.lucene.document.NumericField;
import org.apache.lucene.index.CorruptIndexException;
import org.apache.lucene.index.IndexWriter;
import org.apache.lucene.index.Term;

import org.apache.lucene.search.BooleanQuery;
import org.apache.lucene.search.FieldCache;
import org.apache.lucene.search.IndexSearcher;

import org.apache.lucene.search.MatchAllDocsQuery;
import org.apache.lucene.search.MultiSearcher;

import org.apache.lucene.search.NumericRangeQuery;
import org.apache.lucene.search.Query;
import org.apache.lucene.search.ScoreDoc;
import org.apache.lucene.search.Searchable;
import org.apache.lucene.search.Sort;
import org.apache.lucene.search.SortField;
import org.apache.lucene.search.TermQuery;
import org.apache.lucene.search.TopDocs;

import org.apache.lucene.search.BooleanClause.Occur;
import org.apache.lucene.store.Directory;
import org.apache.lucene.store.LockObtainFailedException;

import org.apache.lucene.store.RAMDirectory;

import com.convertlucene.ConvertFrom2To3;

public class TestNumericRange
{
 public final static void main(String[] args)
 {
   try

   {
     BooleanQuery query = new  BooleanQuery();
     query.add(NumericRangeQuery.newIntRange("numId", 3, 3, true,
true), Occur.MUST_NOT);
     query.add(new MatchAllDocsQuery(), Occur.MUST);

     testNumericRangeSingleSearcher(query);
     testNumericRangeMultiSearcher(query);

   }
   catch(Exception e)
   {
     e.printStackTrace();
   }
 }



 public static void testNumericRangeSingleSearcher(Query query)
throws CorruptIndexException, LockObtainFailedException, IOException
 {
    String[] ids = {"1", "2", "3", "4", "5", "6"};


   Directory directory = new RAMDirectory();

   IndexWriter writer = new IndexWriter(directory, new
WhitespaceAnalyzer(),  IndexWriter.MaxFieldLength.UNLIMITED);

   for (int i = 0; i < ids.length; i++)
   {
     Document doc = new Document();
     doc.add(new Field("id", ids[i],
                       Field.Store.YES,
                       Field.Index.NOT_ANALYZED));
     doc.add(new NumericField("numId").setIntValue(Integer.valueOf(ids[i])));
     writer.addDocument(doc);
   }
   writer.close();


   IndexSearcher searcher = new IndexSearcher(directory);

   TopDocs docs = searcher.search(query, 10);
   System.out.println("SingleSearcher: testNumericRange: hitNum: " +
docs.totalHits);
   for(ScoreDoc doc : docs.scoreDocs)
   {
     System.out.println(searcher.explain(query, doc.doc));
   }
   searcher.close();

   directory.close();
 }

 public static void testNumericRangeMultiSearcher(Query query) throws
CorruptIndexException, LockObtainFailedException, IOException
 {
    String[] ids1 = {"1", "2", "3"};
   Directory directory1 = new RAMDirectory();
   IndexWriter writer1 = new IndexWriter(directory1, new
WhitespaceAnalyzer(),  IndexWriter.MaxFieldLength.UNLIMITED);
   for (int i = 0; i < ids1.length; i++)
   {
     Document doc = new Document();
     doc.add(new Field("id", ids1[i],

                       Field.Store.YES,
                       Field.Index.NOT_ANALYZED));
     doc.add(new NumericField("numId").setIntValue(Integer.valueOf(ids1[i])));
     writer1.addDocument(doc);
   }
   writer1.close();

   String[] ids2 = {"4", "5", "6"};
   Directory directory2 = new RAMDirectory();
   IndexWriter writer2 = new IndexWriter(directory2, new
WhitespaceAnalyzer(),  IndexWriter.MaxFieldLength.UNLIMITED);
   for (int i = 0; i < ids2.length; i++)
   {
     Document doc = new Document();
     doc.add(new Field("id", ids2[i],

                       Field.Store.YES,
                       Field.Index.NOT_ANALYZED));
     doc.add(new NumericField("numId").setIntValue(Integer.valueOf(ids2[i])));
     writer2.addDocument(doc);
   }
   writer2.close();

   IndexSearcher[] searchers = new IndexSearcher[2];
   searchers[0] = new IndexSearcher(directory1);
   searchers[1] = new IndexSearcher(directory2);
   MultiSearcher multiSearcher = new MultiSearcher(searchers);
   TopDocs docs = multiSearcher.search(query, 10);
   System.out.println("MultiSearcher: testNumericRange: hitNum: " +
docs.totalHits);
   for(ScoreDoc doc : docs.scoreDocs)
   {
     System.out.println(multiSearcher.explain(query, doc.doc));
   }
   multiSearcher.close();

   directory1.close();
   directory2.close();
 }


}


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