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Posted to issues@lucene.apache.org by "Naoto Minami (Jira)" <ji...@apache.org> on 2021/02/08 02:20:00 UTC

[jira] [Updated] (SOLR-15114) WAND does not work correctly on multiple segments in Solr 8.6.3

     [ https://issues.apache.org/jira/browse/SOLR-15114?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Naoto Minami updated SOLR-15114:
--------------------------------
    Status: Patch Available  (was: Open)

> WAND does not work correctly on multiple segments in Solr 8.6.3
> ---------------------------------------------------------------
>
>                 Key: SOLR-15114
>                 URL: https://issues.apache.org/jira/browse/SOLR-15114
>             Project: Solr
>          Issue Type: Bug
>      Security Level: Public(Default Security Level. Issues are Public) 
>    Affects Versions: 8.6.3, master (9.0)
>            Reporter: Naoto Minami
>            Priority: Major
>         Attachments: wand.pdf
>
>          Time Spent: 10m
>  Remaining Estimate: 0h
>
> In Solr 8.6.3, minCompetitiveScore of WANDScorer resets to zero for each index segment and remain zero until maxScore is updated.
> There are two causes of this problem:
>  - MaxScoreCollector does not set minCompetitiveScore of MinCompetitiveScoreAwareScorable newly generated for another index segment.
>  - MaxScoreCollector updates minCompetitiveScore only if maxScore is updated. This behavior is correct considering the purpose of MaxScoreCollector.
> For details, see the attached pdf.
> *Note*
> This problem occurs in distributed search (SolrCloud) or the fl=score parameter specified.



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