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https://issues.apache.org/jira/browse/LUCENE-6758?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Terry Smith updated LUCENE-6758:
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Attachment: LUCENE-6758.patch
Run this unit test a few times and you'll hit a failure when DefaultSimilarity
is picked.
The method testBQHitOrEmpty() will fail because the score is zero. It's friend
testBQHitOrMiss() has a non-zero score.
The difference between the two is that the field "empty" is unused, whereas the
field "test" has one token ("hit").
> Adding a SHOULD clause to a BQ over an empty field clears the score when
> using DefaultSimilarity
> ------------------------------------------------------------------------------------------------
>
> Key: LUCENE-6758
> URL: https://issues.apache.org/jira/browse/LUCENE-6758
> Project: Lucene - Core
> Issue Type: Bug
> Affects Versions: Trunk
> Reporter: Terry Smith
> Attachments: LUCENE-6758.patch
>
>
> Patch with unit test to show the bug will be attached.
> I've narrowed this change in behavior with git bisect to the following commit:
> {noformat}
> commit 698b4b56f0f2463b21c9e3bc67b8b47d635b7d1f
> Author: Robert Muir <rm...@apache.org>
> Date: Thu Aug 13 17:37:15 2015 +0000
> LUCENE-6711: Use CollectionStatistics.docCount() for IDF and average
> field length computations
>
> git-svn-id: https://svn.apache.org/repos/asf/lucene/dev/trunk@1695744
> 13f79535-47bb-0310-9956-ffa450edef68
> {noformat}
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