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https://issues.apache.org/jira/browse/SOLR-15114?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Tomas Eduardo Fernandez Lobbe reassigned SOLR-15114:
----------------------------------------------------

    Assignee: Tomas Eduardo Fernandez Lobbe

> 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
>            Assignee: Tomas Eduardo Fernandez Lobbe
>            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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