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https://issues.apache.org/jira/browse/SOLR-8295?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15007619#comment-15007619
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ASF subversion and git services commented on SOLR-8295:
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Commit 1714709 from hoss...@apache.org in branch 'dev/branches/branch_5x'
[ https://svn.apache.org/r1714709 ]
SOLR-8295: Fix NPE in collapse QParser when collapse field is missing from all
docs in a segment (merge r1714701)
> collapse parser can trigger NPE when a segment has empty DocValues for
> collapse field (ie: no doc in segment has a value)
> -------------------------------------------------------------------------------------------------------------------------
>
> Key: SOLR-8295
> URL: https://issues.apache.org/jira/browse/SOLR-8295
> Project: Solr
> Issue Type: Bug
> Reporter: Steve Rowe
> Assignee: Hoss Man
> Fix For: 5.4, Trunk
>
> Attachments: SOLR-8295.patch
>
>
> When collapsing on a field that doesn't exist for all documents, the
> existence of a segment that does not contain any documents that have a value
> can cause an NPE as the collapse parser assumes the DocValues for a segment
> will always be non-null.
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