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https://issues.apache.org/jira/browse/LUCENE-8117?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16311836#comment-16311836
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Jim Ferenczi commented on LUCENE-8117:
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This issue is only on 7x (where advanceExact has been added) since it is not
possible to use an index with Lucene54DocValuesProducer in 8x.
> advanceExact does not work on sorted numeric dvs with
> Lucene54DocValuesProducer
> --------------------------------------------------------------------------------
>
> Key: LUCENE-8117
> URL: https://issues.apache.org/jira/browse/LUCENE-8117
> Project: Lucene - Core
> Issue Type: Bug
> Affects Versions: 7.2
> Reporter: Jim Ferenczi
> Attachments: LUCENE-8117.patch
>
>
> DocValues are iterators now so old doc values (produced with
> Lucene54DocValues) also implements advance and advanceExact. Though sorted
> numerics produced by Lucene54DocValues are not working as expected when
> advanceExact is used.
> In such case, the docValueCount is as expected but the values returned by the
> iterator for the document are invalid. This is due to a bug in the
> implementation of advanceExact in the producer that does not set the offset
> of the current doc when the function is used.
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