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From "Christine Poerschke (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (SOLR-11164) OriginalScoreFeature causes NullPointerException during feature logging with SolrCloud mode.
Date Thu, 17 Aug 2017 18:34:00 GMT

    [ https://issues.apache.org/jira/browse/SOLR-11164?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16130976#comment-16130976
] 

Christine Poerschke commented on SOLR-11164:
--------------------------------------------

Thanks [~yuyano] for the new patch against master branch!

(It will work of course but I have doubts re: hard-coding the special interpretation of _0.0f_
meaning _"no score"_ in another place and therefore have proposed SOLR-11254 _DocTransformer.transform_
signature change as a way to avoid that.)

> OriginalScoreFeature causes NullPointerException during feature logging with SolrCloud
mode.
> --------------------------------------------------------------------------------------------
>
>                 Key: SOLR-11164
>                 URL: https://issues.apache.org/jira/browse/SOLR-11164
>             Project: Solr
>          Issue Type: Bug
>      Security Level: Public(Default Security Level. Issues are Public) 
>          Components: contrib - LTR
>    Affects Versions: 6.6
>            Reporter: Yuki Yano
>         Attachments: SOLR-11164_master.patch, SOLR-11164.patch, SOLR-11164.patch
>
>
> In FeatureTransfer, OriginalScoreFeature uses original Query instance preserved in LTRScoringQuery
for the evaluation.
> This query is set in RankQuery#wrap during QueryComponent#process.
> With SolrCloud mode, document searches take two steps: finding top-N document ids, and
filling documents of found ids.
> In this case, FeatureTransformer works in the second step and tries to extract features
with LTRScoringQuery built in QueryComponent#prepare.
> However, because the second step doesn't call QueryComponent#process, the original query
of LTRScoringQuery remains null and this causes NullPointerException while evaluating OriginalScoreFeature.
> We can get the original query from ResultContext which is an argument of DocTransformer#setContext,
thus this problem can solve by using it if LTRScoringQuery doesn't have correct original query.



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