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https://issues.apache.org/jira/browse/SOLR-13143?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16745387#comment-16745387
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Erick Erickson commented on SOLR-13143:
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Is this the same as SOLR-13126?
> Output from ExplainAugmenterFactory and DebugQuery for rerank queries is not
> same
> ---------------------------------------------------------------------------------
>
> Key: SOLR-13143
> URL: https://issues.apache.org/jira/browse/SOLR-13143
> Project: Solr
> Issue Type: Bug
> Security Level: Public(Default Security Level. Issues are Public)
> Components: search
> Affects Versions: 7.5
> Reporter: Sambhav Kothari
> Priority: Minor
> Attachments: bug.patch
>
>
> Currently, if we use the ExplainAugmenterFactory with LtR, instead of using
> the
> model/re-rankers explain method, it uses the default query explain (tf-idf
> explanation). This happens because the BasicResultContext doesn't wrap the
>
> query([https://github.com/apache/lucene-solr/blob/1d85cd783863f75cea133fb9c452302]
>
> 214165a4d/solr/core/src/java/org/apache/solr/response/BasicResultContext.java#L6
> 7) with the RankQuery when its set to context's query, which is then used by
> the ExplainAugmenterFactory.
>
> ([https://github.com/apache/lucene-solr/blob/1d85cd783863f75cea133fb9c45230221416]
>
> 5a4d/solr/core/src/java/org/apache/solr/response/transform/ExplainAugmenterFacto
> ry.java#L111).
> As a result there are discrepancies between queries like -
> [http://localhost:8983/solr/collection1/select?q=*:*&collection=collectionName&wt]
> =json&fl=[explain style=nl],score&rq=\{!ltr model=linear-model}
> [http://localhost:8983/solr/collection1/select?q=*:*&collection=collectionName&wt]
> =json&fl=score&rq=\{!ltr model=linear-model}&debugQuery=true
> the former outputs the explain from the SimilarityScorer's explain while the
> latter uses the correct LtR ModelScorer's explain.
> There are a few other problems with the explain augmenter - for eg. it
> doesn't
> work with grouping (although the other doc transformers like LtR's
> LTRFeatureLoggerTransformerFactory work with grouping)
> Mailing List -
>
> http://mail-archives.apache.org/mod_mbox/lucene-solr-user/201901.mbox/%3C5C3879D702C30144003902B0_0_18802%40msllnjpmsgsv06%3E
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