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https://issues.apache.org/jira/browse/SOLR-2981?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13434868#comment-13434868
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Roman Kliewer commented on SOLR-2981:
-------------------------------------

Hello, this is my first comment here.

The bug is caused by the call {{res.add(FACETS, nl)}} in 
[StatsValuesFactory|http://svn.apache.org/viewvc/lucene/dev/trunk/solr/core/src/java/org/apache/solr/handler/component/StatsValuesFactory.java?view=markup]
 in the method {{getStatsValues()}}

The call is now within the facet iteration loop and adds the +same object+ 
{{nl}} multiple times to the {{res}}. Just put the call outside of the loop to 
fix. 

[^SOLR-2981.patch]
                
> multiple stats.facet params duplicate stats faceting output
> -----------------------------------------------------------
>
>                 Key: SOLR-2981
>                 URL: https://issues.apache.org/jira/browse/SOLR-2981
>             Project: Solr
>          Issue Type: Bug
>    Affects Versions: 3.5
>            Reporter: Hoss Man
>         Attachments: SOLR-2981.patch
>
>
> * Load the example data
> * Load a URL that uses "stats.facet" on multiple fields, ie: 
> http://localhost:8983/solr/select?q=*:*&stats=true&stats.field=price&stats.field=popularity&stats.twopass=true&rows=00&indent=true&stats.facet=inStock&stats.facet=manu_id_s
> Response will include two identical "facets" lists for each stats field (ie 
> both "facets" blocks will contain the faceted stats for both of the 
> stats.facet fields)

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