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https://issues.apache.org/jira/browse/LUCENE-4504?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13484272#comment-13484272
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Michael McCandless commented on LUCENE-4504:
--------------------------------------------
That's definitely a bug, and the fix looks good (though are we sure the first
if shouldn't return 1?).
Do you have a test showing the bug/fix? Thanks.
> Empty results from IndexSearcher.searchAfter() when sorting by FunctionValues
> -----------------------------------------------------------------------------
>
> Key: LUCENE-4504
> URL: https://issues.apache.org/jira/browse/LUCENE-4504
> Project: Lucene - Core
> Issue Type: Bug
> Components: modules/other
> Affects Versions: 4.0
> Reporter: TomShally
> Priority: Minor
> Attachments: LUCENE-4504.patch
>
>
> IS.searchAfter() always returns an empty result when using FunctionValues for
> sorting.
> The culprit is ValueSourceComparator.compareDocToValue() returning -1 when it
> should return +1.
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