[jira] [Updated] (LUCENE-6758) Adding a SHOULD clause to a BQ over an empty field clears the score when using DefaultSimilarity

["Robert Muir (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/LUCENE-6758?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Robert Muir updated LUCENE-6758:
--------------------------------
    Attachment: LUCENE-6758.patch

The problem is just with crappy queryNorm in DefaultSimilarity, as expected.

Previously maxDoc was used, which was always assumed to be a positive integer... but docCount can be zero.

> 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, 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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