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From "Robert Muir (JIRA)" <j...@apache.org>
Subject [jira] Commented: (LUCENE-2936) score and explain don't match
Date Wed, 23 Feb 2011 23:59:38 GMT

    [ https://issues.apache.org/jira/browse/LUCENE-2936?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12998623#comment-12998623
] 

Robert Muir commented on LUCENE-2936:
-------------------------------------

{noformat}
I don't understand 95% of what yonik & robert have been saying in this issue – but fortunately
i don't think that matters – it sounds like they both agree htat what they are talking about
is unrelated to this bug.
{noformat}

Sorry for the confusion, my issues were actually a separate (corner-case) bug, which yonik
fixed already in LUCENE-2937. That bug would cause you to have a field boost of 0 in some
very very rare/likely-to-have-never-happened-with-our-default-sim cases when you shouldn't.

So for this issue we can address the explains, for when you explicitly set boost of zero.


> score and explain don't match
> -----------------------------
>
>                 Key: LUCENE-2936
>                 URL: https://issues.apache.org/jira/browse/LUCENE-2936
>             Project: Lucene - Java
>          Issue Type: Bug
>    Affects Versions: 2.9.4, 3.0.3, 3.1, 4.0
>            Reporter: Koji Sekiguchi
>            Assignee: Robert Muir
>            Priority: Minor
>         Attachments: LUCENE-2936.patch, LUCENE-2936.patch, LUCENE-2936.test.patch, TestScore.java
>
>
> I've faced this problem recently. I'll attach a program to reproduce the problem soon.
The program outputs the following:
> {noformat}
> ** score = 0.10003257
> ** explain
> 0.050016284 = (MATCH) product of:
>   0.15004885 = (MATCH) sum of:
>     0.15004885 = weight(f1:"note book" in 0), product of:
>       0.3911943 = queryWeight(f1:"note book"), product of:
>         0.61370564 = idf(f1: note=1 book=1)
>         0.6374299 = queryNorm
>       0.38356602 = fieldWeight(f1:"note book" in 0), product of:
>         1.0 = tf(phraseFreq=1.0)
>         0.61370564 = idf(f1: note=1 book=1)
>         0.625 = fieldNorm(field=f1, doc=0)
>   0.33333334 = coord(1/3)
> {noformat}

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