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