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https://issues.apache.org/jira/browse/SOLR-12337?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16480896#comment-16480896
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David Smiley commented on SOLR-12337:
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That TODO RE getProcessedFilter is a new issue I filed: SOLR-12375
> Remove QueryWrapperFilter
> -------------------------
>
> Key: SOLR-12337
> URL: https://issues.apache.org/jira/browse/SOLR-12337
> Project: Solr
> Issue Type: Sub-task
> Security Level: Public(Default Security Level. Issues are Public)
> Reporter: David Smiley
> Assignee: David Smiley
> Priority: Major
> Attachments: SOLR-12337.patch
>
>
> QueryWrapperFilter has not been needed ever since Filter was changed to
> extend Query -- LUCENE-1518. It was retained because there was at least one
> place in Lucene that had a Filter/Query distinction, but it was forgotten
> when Filter moved to Solr. It contains some code that creates a temporary
> IndexSearcher but forgets to null out the cache on it, and so
> QueryWrapperFilter can add non-trivial overhead. We should simply remove it
> altogether.
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