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https://issues.apache.org/jira/browse/SOLR-12378?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16506460#comment-16506460
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ASF subversion and git services commented on SOLR-12378:
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Commit 9b5dd15471a979ef4e5f197c6673e0e324b2f24d in lucene-solr's branch
refs/heads/master from [~ctargett]
[ https://git-wip-us.apache.org/repos/asf?p=lucene-solr.git;h=9b5dd15 ]
SOLR-12378: Ref Guide: reformat parameter list; break up big paragraph; fix
typos
> Support missing versionField on indexed docs in DocBasedVersionConstraintsURP
> -----------------------------------------------------------------------------
>
> Key: SOLR-12378
> URL: https://issues.apache.org/jira/browse/SOLR-12378
> Project: Solr
> Issue Type: Improvement
> Security Level: Public(Default Security Level. Issues are Public)
> Components: UpdateRequestProcessors
> Affects Versions: master (8.0)
> Reporter: Oliver Bates
> Assignee: Mark Miller
> Priority: Minor
> Labels: features, patch
> Fix For: 7.4, master (8.0)
>
> Attachments: SOLR-12378.patch, SOLR-12378.patch,
> supportMissingVersionOnOldDocs-v1.patch
>
>
> -If we want to start using DocBasedVersionConstraintsUpdateRequestProcessor
> on an existing index, we have to reindex everything to set value for the
> 'versionField' field, otherwise- We can't start using
> DocBasedVersionConstraintsUpdateRequestProcessor on an existing index because
> we get this line throwing shade:
> {code:java}
> throw new SolrException(SERVER_ERROR,
> "Doc exists in index, but has null versionField: "
> + versionFieldName);
> {code}
> We have to reindex everything into a new collection, which isn't always
> practical/possible. The proposal here is to have an option to allow the
> existing docs to be missing this field and to simply treat those docs as
> older than anything coming in with that field set.
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