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Date: Wed, 29 Jul 2009 05:56:14 -0700 (PDT)
From: "Koji Sekiguchi (JIRA)" <jira@apache.org>
To: java-dev@lucene.apache.org
Subject: [jira] Updated: (LUCENE-1752) incorrect snippet returned with
 SpanScorer
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     [ https://issues.apache.org/jira/browse/LUCENE-1752?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Koji Sekiguchi updated LUCENE-1752:
-----------------------------------

    Fix Version/s: 2.9

I'd like set 2.9. With the patch, highlighter works on our production environment perfectly.

> incorrect snippet returned with SpanScorer
> ------------------------------------------
>
>                 Key: LUCENE-1752
>                 URL: https://issues.apache.org/jira/browse/LUCENE-1752
>             Project: Lucene - Java
>          Issue Type: Bug
>          Components: contrib/highlighter
>    Affects Versions: 2.9
>            Reporter: Koji Sekiguchi
>            Assignee: Mark Miller
>            Priority: Minor
>             Fix For: 2.9
>
>         Attachments: LUCENE-1752.patch
>
>
> This problem was reported by my customer. They are using Solr 1.3 and uni-gram, but it can be reproduced with Lucene 2.9 and WhitespaceAnalyzer.
> {panel:title=Query}
> (f1:"a b c d" OR f2:"a b c d") AND (f1:"b c g" OR f2:"b c g")
> {panel}
> The snippet we expected is:
> {panel}
> x y z <B>a</B> <B>b</B> <B>c</B> <B>d</B> e f g <B>b</B> <B>c</B> <B>g</B>
> {panel}
> but we got:
> {panel}
> x y z <B>a</B> b c <B>d</B> e f g <B>b</B> <B>c</B> <B>g</B>
> {panel}
> Program to reproduce the problem:
> {code}
> public class TestHighlighter {
>   static final String CONTENT = "x y z a b c d e f g b c g";
>   static final String PH1 = "\"a b c d\"";
>   static final String PH2 = "\"b c g\"";
>   static final String F1 = "f1";
>   static final String F2 = "f2";
>   static final String F1C = F1 + ":";
>   static final String F2C = F2 + ":";
>   static final String QUERY_STRING =
>     "(" + F1C + PH1 + " OR " + F2C + PH1 + ") AND ("
>     + F1C + PH2 + " OR " + F2C + PH2 + ")";
>   static Analyzer analyzer = new WhitespaceAnalyzer();
>   
>   public static void main(String[] args) throws Exception {
>     QueryParser qp = new QueryParser( F1, analyzer );
>     Query query = qp.parse( QUERY_STRING );
>     CachingTokenFilter stream = new CachingTokenFilter( analyzer.tokenStream( F1, new StringReader( CONTENT ) ) );
>     Scorer scorer = new SpanScorer( query, F1, stream, false );
>     Highlighter h = new Highlighter( scorer );
>     System.out.println( "query : " + QUERY_STRING );
>     System.out.println( h.getBestFragment( analyzer, F1,  CONTENT ) );
>   }
> }
> {code}

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