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https://issues.apache.org/jira/browse/LUCENE-7132?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Michael McCandless updated LUCENE-7132:
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Attachment: LUCENE-7132.patch
OK I found another test bug: you have to use a {{LogMergePolicy}} when building
the single segment searcher else the docIDs can be jumbled since otherwise
merge policies are allowed (and, do!) to merge segments out of order.
Maybe this also explains the original "force merge changed results" issue?
Except, on the one seed I was debugging before, the original index was a single
segment, so no matter the merge policy, the docID order would not change ...
Here's Hoss's last patch with those two test bugs fixed ... seems to survive
beasting of {{TestBoolean2}} for a while, and Lucene's core tests passed once.
> BooleanQuery scores can be diff for same docs+sim when using coord (disagree
> with Explanation which doesn't change)
> -------------------------------------------------------------------------------------------------------------------
>
> Key: LUCENE-7132
> URL: https://issues.apache.org/jira/browse/LUCENE-7132
> Project: Lucene - Core
> Issue Type: Bug
> Components: core/search
> Affects Versions: 5.5
> Reporter: Ahmet Arslan
> Assignee: Steve Rowe
> Attachments: LUCENE-7132.patch, LUCENE-7132.patch, LUCENE-7132.patch,
> LUCENE-7132.patch, LUCENE-7132.patch, LUCENE-7132.patch, LUCENE-7132.patch,
> SOLR-8884.patch, SOLR-8884.patch, debug.xml
>
>
> Some of the folks
> [reported|http://find.searchhub.org/document/80666f5c3b86ddda] that sometimes
> explain's score can be different than the score requested by fields
> parameter. Interestingly, Explain's scores would create a different ranking
> than the original result list. This is something users experience, but it
> cannot be re-produced deterministically.
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