[jira] [Commented] (SOLR-6510) select?collapse=... - fix NPE in Collapsing(FieldValue|Score)Collector

["David Smiley (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/SOLR-6510?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14229265#comment-14229265 ] 

David Smiley commented on SOLR-6510:
------------------------------------

Aha.  The problem is that all the codecs are in rotation, to include Lucene42 which didn't support DocValues with empty values.  I'll add a suitable \@SuppressCodecs list to the test and get this committed tonight.

> select?collapse=... - fix NPE in Collapsing(FieldValue|Score)Collector
> ----------------------------------------------------------------------
>
>                 Key: SOLR-6510
>                 URL: https://issues.apache.org/jira/browse/SOLR-6510
>             Project: Solr
>          Issue Type: Bug
>    Affects Versions: 4.8.1
>            Reporter: Christine Poerschke
>            Assignee: David Smiley
>            Priority: Minor
>             Fix For: 4.10.3, Trunk
>
>
> Affects branch_4x but not trunk, collapse field must be docValues=true and shard empty (or with nothing indexed for the field?).



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