Ensure cross_fields always uses valid term statistics (#90278) #90314
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In elastic#89016 we adjusted the `cross_fields` scoring formula to prevent negative scores. This fix accidentally dropped another important fix that was added in elastic#41938. Specifically, we need to make sure to take the minimum between the document frequency (`actualDf`) and the minimum total term frequency (`minTTF`). Otherwise, we can produce invalid term statistics where the total term frequency is less than the document frequency. Fixes elastic#90275
jtibshirani
added
>regression
:Search Relevance/Ranking
Collaborator
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Hi @jtibshirani, I've created a changelog YAML for you. |
Collaborator
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Pinging @elastic/es-search (Team:Search) |
Contributor
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@jtibshirani Thx for the fix! btw, there appears to be some formatting issues with the release notes change. When clicking on 8.4.2 release notes, it shows a blank page. It looks like all the content (including bugs and enhancements) is now listed under the subheading "Known issues".
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Contributor
Author
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Oops, thanks for catching this @ppf2. I just pushed a fix. |
jpountz
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jpountz
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In #89016 we adjusted the
cross_fieldsscoring formula to prevent negativescores. This fix accidentally dropped another important fix that was added in
#41938. Specifically, we need to make sure to take the minimum between the
document frequency (
actualDf) and the minimum total term frequency(
minTTF). Otherwise, we can produce invalid term statistics where the totalterm frequency is less than the document frequency.
Backport of #90278