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https://issues.apache.org/jira/browse/SOLR-7759?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16255340#comment-16255340
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Alessandro Benedetti commented on SOLR-7759:
--------------------------------------------

Up, is anyone interested in fixing this problem ?
I attached a tentative patch months ago, let me know if anyone is interested 
and we can work on it to fix it !

> DebugComponent's explain should be implemented as a distributed query
> ---------------------------------------------------------------------
>
>                 Key: SOLR-7759
>                 URL: https://issues.apache.org/jira/browse/SOLR-7759
>             Project: Solr
>          Issue Type: Bug
>            Reporter: Varun Thacker
>         Attachments: SOLR_7759.patch
>
>
> Currently when we use debugQuery to see the explanation of the matched 
> documents, the query fired to get the statistics for the matched documents is 
> not a distributed query.
> This is a problem when using distributed idf. The actual documents are being 
> scored using the global stats and not per shard stats , but the explain will 
> show us the score by taking into account the stats from the shard where the 
> document belongs to.
> We should try to implement the explain query as a distributed request so that 
> the scores match the actual document scores.



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