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From: Paul Elschot <paul.elschot@xs4all.nl>
To: java-dev@lucene.apache.org
Subject: Re: DO NOT REPLY [Bug 34154]  - Further improvements to
 BooleanScorer2
Date: Tue, 26 Jul 2005 09:04:16 +0200
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On Tuesday 26 July 2005 03:01, Erik Hatcher wrote:
> 
> On Jul 24, 2005, at 11:23 AM, Paul Elschot wrote:
> 
> > On Friday 22 July 2005 21:18, Erik Hatcher wrote:
> >
> >> Paul,
> >>
> >> I don't have a test case handy (yet), but we're still seeing the
> >> exception even after applying the patch from #35823.  Do I need to
> >>
> >
> > I'm sorry to hear that. However, the patch from bug 35823 allows
> > using of score() more than once on the same document number,
> > so I think it is worthwhile to have anyway.
> > A test case showing the exception would off course be wellcome.
> 
> Paul - I just updated to your BooleanScorer2 and got the output shown  
> below.  I don't have a test case that I can provide, as the data is  
> private for the case that causes this error.  The search is something  
> like (I changed the words because that information is also private,  
> sorry):

The words should have no influence on this.
 
> +(spanNear([FULLTEXT:cat, FULLTEXT:dog, FULLTEXT:bird], 1, true)  
> spanNear([FULLTEXT:horse, FULLTEXT:cow, FULLTEXT:pig], 1, true)  
> spanNear([FULLTEXT:snake, FULLTEXT:camel], 0, true)) +(FULLTEXT:zebra  
> FULLTEXT:insect spanNear([FULLTEXT:feline, FULLTEXT:goat], 0, true))

Reformatted to show the structure:
+(spanNear([FULLTEXT:cat, FULLTEXT:dog, FULLTEXT:bird], 1, true)  
  spanNear([FULLTEXT:horse, FULLTEXT:cow, FULLTEXT:pig], 1, true)  
  spanNear([FULLTEXT:snake, FULLTEXT:camel], 0, true)
)
+(FULLTEXT:zebra
  FULLTEXT:insect
  spanNear([FULLTEXT:feline, FULLTEXT:goat], 0, true)
)

The top level ConjunctionScorer nicely shows up in the traceback.

> 
> Quite a sophisticated query mixing BooleanQuery and SpanNearQuery  
> clauses.
> 
> Let me know if there is other information I can provide, or other  
> variants of BooleanScorer2 I can try.
> 
> Thanks,
>      Erik
> 
> java.lang.ArrayIndexOutOfBoundsException: More matchers (4) than non  
> prohibited scorers (3).

The DisjunctionSumScorer for one of the two 3 way queries is adding
too many matchers.

> Added 4 for doc nr 4930.
> 0 required scorers.
> 3 optional scorers.
> 0 prohibited scorers.

This is consistent with the query.
Could you keep this index around for later tests?

>      at org.apache.lucene.search.BooleanScorer2 
> $Coordinator.addDocMatchers(BooleanScorer2.java:57)
>      at org.apache.lucene.search.BooleanScorer2$1.score 
> (BooleanScorer2.java:157)
>      at org.apache.lucene.search.BooleanScorer2.score 
> (BooleanScorer2.java:329)
>      at org.apache.lucene.search.ConjunctionScorer.score 
> (ConjunctionScorer.java:82)
>      at org.apache.lucene.search.BooleanScorer2$2.score 
> (BooleanScorer2.java:182)
>      at org.apache.lucene.search.BooleanScorer2.score 
> (BooleanScorer2.java:329)
>      at org.apache.lucene.search.BooleanScorer2.score 
> (BooleanScorer2.java:289)
>      at org.apache.lucene.search.IndexSearcher.search 
> (IndexSearcher.java:102)
>      at org.apache.lucene.search.Hits.getMoreDocs(Hits.java:65)
>      at org.apache.lucene.search.Hits.<init>(Hits.java:44)
>      at org.apache.lucene.search.Searcher.search(Searcher.java:40)
>      at org.apache.lucene.search.Searcher.search(Searcher.java:32)
> 

Thanks a lot. I'll check the use of DisjunctionSumScorer in BooleanScorer2 later.

Regards,
Paul Elschot


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