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https://issues.apache.org/jira/browse/SOLR-10114?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15873576#comment-15873576
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ASF subversion and git services commented on SOLR-10114:
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Commit ea19bf5101817bae5b7b133a7d9d40ab41aac6ec in lucene-solr's branch
refs/heads/master from [~ichattopadhyaya]
[ https://git-wip-us.apache.org/repos/asf?p=lucene-solr.git;h=ea19bf5 ]
Move solr/CHANGES.txt entries to appropriate sections after backporting
SOLR-5944 and SOLR-10114
> Reordered delete-by-query can delete or omit child documents
> ------------------------------------------------------------
>
> Key: SOLR-10114
> URL: https://issues.apache.org/jira/browse/SOLR-10114
> Project: Solr
> Issue Type: Bug
> Security Level: Public(Default Security Level. Issues are Public)
> Affects Versions: 4.5
> Reporter: Yonik Seeley
> Assignee: Yonik Seeley
> Fix For: master (7.0)
>
> Attachments: SOLR-10114-2.patch, SOLR-10114-2.patch,
> SOLR-10114-3.patch, SOLR-10114.patch, SOLR-10114.patch,
> SOLR-10114-test-cleanup.patch, SOLR-10114-validation.patch
>
>
> It looks like when a block of documents is indexed, child documents get no
> \_version\_ field. This means (among other potential issues) that a
> delete-by-query that is reordered will cause matching child documents to be
> deleted. DBQ normally prevents deleting newer docs by including a
> restriction on \_version\_, which doesn't work for anything lacking that
> field. Re-ordered delete-by-term of any child docs would also be affected
> (although it should be a much rarer issue.)
> The leading candidate for a fix is to use the exact same \_version\_ for all
> child docs.
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