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https://issues.apache.org/jira/browse/LUCENE-8017?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Alan Woodward resolved LUCENE-8017.
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Resolution: Fixed
Fix Version/s: 7.2
Thanks all
> FunctionRangeQuery and FunctionMatchQuery can pollute the QueryCache
> --------------------------------------------------------------------
>
> Key: LUCENE-8017
> URL: https://issues.apache.org/jira/browse/LUCENE-8017
> Project: Lucene - Core
> Issue Type: Bug
> Reporter: Alan Woodward
> Assignee: Alan Woodward
> Priority: Major
> Fix For: 7.2
>
> Attachments: LUCENE-8017.patch, LUCENE-8017.patch, LUCENE-8017.patch
>
>
> The QueryCache assumes that queries will return the same set of documents
> when run over the same segment, independent of all other segments held by the
> parent IndexSearcher. However, both FunctionRangeQuery and
> FunctionMatchQuery can select hits based on score, which depend on term
> statistics over the whole index, and could therefore theoretically return
> different result sets on a given segment.
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