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https://issues.apache.org/jira/browse/LUCENE-2348?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12935731#action_12935731
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Robert Muir commented on LUCENE-2348:
-------------------------------------
Trejkaz, i think you are confused.
This is only a special case of TopFieldCollector, your notes about
Hits/Hitcollector are irrelevant.
The situation here is it should never have been a filter in the first place,
this is a bad design.
So I plan to commit this patch in a few days, as well as marking @deprecated.
If someone wants to later provide a 'replacement' thats fine, but this is
contrib, and its not necessary
for us provide one to deprecate problems like this!
> DuplicateFilter incorrectly handles multiple calls to getDocIdSet for segment
> readers
> -------------------------------------------------------------------------------------
>
> Key: LUCENE-2348
> URL: https://issues.apache.org/jira/browse/LUCENE-2348
> Project: Lucene - Java
> Issue Type: Bug
> Components: contrib/*
> Affects Versions: 2.9.2
> Reporter: Trejkaz
> Attachments: LUCENE-2348.patch, LUCENE-2348.patch
>
>
> DuplicateFilter currently works by building a single doc ID set, without
> taking into account that getDocIdSet() will be called once per segment and
> only with each segment's local reader.
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