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https://issues.apache.org/jira/browse/SOLR-7781?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Yonik Seeley updated SOLR-7781:
-------------------------------
    Attachment: SOLR-7781.patch

Here's the patch.

> FieldFaceting BytesRef reuse bug
> --------------------------------
>
>                 Key: SOLR-7781
>                 URL: https://issues.apache.org/jira/browse/SOLR-7781
>             Project: Solr
>          Issue Type: Bug
>          Components: Facet Module
>    Affects Versions: 5.1
>            Reporter: Yonik Seeley
>            Assignee: Yonik Seeley
>             Fix For: 5.3
>
>         Attachments: SOLR-7781.patch
>
>
> FieldFaceting on a string field has
> {code}
> new TermQuery( new Term(field, bytesRef.clone() ) )
> {code}
> The bytesRef needs to be deep copied (and clone() only implements a shallow 
> copy).
> This causes to the query inserted into the filter cache to be changed after 
> the fact, and causes both cache misses and even cache growth way past 
> configured limits due to failures to remove old cache items (SOLR-7777).



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