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From "Sambhav Kothari (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (SOLR-13143) Output from ExplainAugmenterFactory and DebugQuery for rerank queries is not same
Date Thu, 17 Jan 2019 12:43:00 GMT

     [ https://issues.apache.org/jira/browse/SOLR-13143?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Sambhav Kothari updated SOLR-13143:
-----------------------------------
    Labels:   (was: patch)

> 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)



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