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https://issues.apache.org/jira/browse/LUCENE-5536?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13939381#comment-13939381
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ASF subversion and git services commented on LUCENE-5536:
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Commit 1578954 from [~shaie] in branch 'dev/branches/branch_4x'
[ https://svn.apache.org/r1578954 ]
LUCENE-5536: don't call rollup() from TaxonomyFacets associations
> TaxonomyFacetSumInt/FloatAssociations should not rollup()
> ---------------------------------------------------------
>
> Key: LUCENE-5536
> URL: https://issues.apache.org/jira/browse/LUCENE-5536
> Project: Lucene - Core
> Issue Type: Bug
> Components: modules/facet
> Reporter: Shai Erera
> Fix For: 4.8, 5.0
>
> Attachments: LUCENE-5536.patch
>
>
> Stumbled upon this by accident when I reviewed the code. The previous
> associations impl never rolled-up. The assumption is that association values
> are given to exact categories and have no hierarchical meaning. For instance
> if a document is associated with two categories: {{Category/CS/Algo}} and
> {{Category/CS/DataStructure}} with weights {{0.95}} and {{0.43}}
> respectively, it is not associated with {{Category/CS}} with weight {{1.38}}!
> :)
> If the app wants to association values to apply to parents in the hierarchy
> as well, it needs to explicitly specify that (as in passing the hierarchy
> categories with their own association value).
> I will fix the bug and also make sure the app cannot trip it by accidentally
> specifying hierarchical on these categories, or that if it does (cause e.g.
> it indexes the categories for both counting and assoc values) then we don't
> apply the association to all the categories in the hierarchy.
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