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https://issues.apache.org/jira/browse/SOLR-11164?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16141705#comment-16141705
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ASF subversion and git services commented on SOLR-11164:
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Commit f4b3d5644a98191ef2b18b3a6604774abaf0c339 in lucene-solr's branch
refs/heads/branch_7x from [~cpoerschke]
[ https://git-wip-us.apache.org/repos/asf?p=lucene-solr.git;h=f4b3d56 ]
SOLR-11164, SOLR-11180, SOLR-11220: Fix NullPointerException and
always-returns-zero contrib/ltr OriginalScoreFeature issues in SolrCloud mode.
(Yuki Yano, Jonathan Gonzalez, Ryan Yacyshyn, Christine Poerschke)
> 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
> Assignee: Christine Poerschke
> Attachments: SOLR-11164_master.patch, SOLR-11164_master_v2.patch,
> SOLR-11164.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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