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https://issues.apache.org/jira/browse/LUCENE-7991?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Christine Poerschke resolved LUCENE-7991.
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Resolution: Fixed
Fix Version/s: 7.2
master (8.0)
> KNearestNeighborDocumentClassifier.knnSearch applies previous boosted field's
> factor to subsequent unboosted fields
> -------------------------------------------------------------------------------------------------------------------
>
> Key: LUCENE-7991
> URL: https://issues.apache.org/jira/browse/LUCENE-7991
> Project: Lucene - Core
> Issue Type: Bug
> Components: modules/classification
> Reporter: Christine Poerschke
> Assignee: Christine Poerschke
> Priority: Minor
> Fix For: master (8.0), 7.2
>
> Attachments: LUCENE-7991.patch
>
>
> When reading code noticed that in
> [KNearestNeighborClassifier|https://github.com/apache/lucene-solr/blob/releases/lucene-solr/7.0.1/lucene/classification/src/java/org/apache/lucene/classification/KNearestNeighborClassifier.java#L179-L182]
> a neutral boost factor is restored but in
> [KNearestNeighborDocumentClassifier|https://github.com/apache/lucene-solr/blob/releases/lucene-solr/7.0.1/lucene/classification/src/java/org/apache/lucene/classification/document/KNearestNeighborDocumentClassifier.java#L126]
> this currently does not happen. This seems unintended.
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