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https://issues.apache.org/jira/browse/LUCENE-8344?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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David Smiley updated LUCENE-8344:
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Attachment: LUCENE-8344.patch
> TokenStreamToAutomaton doesn't ignore trailing posInc when
> preservePositionIncrements=false
> -------------------------------------------------------------------------------------------
>
> Key: LUCENE-8344
> URL: https://issues.apache.org/jira/browse/LUCENE-8344
> Project: Lucene - Core
> Issue Type: Bug
> Components: modules/suggest
> Reporter: David Smiley
> Priority: Major
> Attachments: LUCENE-8344.patch
>
>
> TokenStreamToAutomaton in Lucene core is used by the AnalyzingSuggester
> (incl. FuzzySuggester subclass ) and NRT Document Suggester and soon the
> SolrTextTagger. It has a setting {{preservePositionIncrements}} defaulting
> to true. If it's set to false (e.g. to ignore stopwords) and if there is a
> _trailing_ position increment greater than 1, TS2A will _still_ add position
> increments (holes) into the automata even though it was configured not to.
> I'm filing this issue separate from LUCENE-8332 where I first found it. The
> fix is very simple but I'm concerned about back-compat ramifications so I'm
> filing it separately. I'll attach a patch to show the problem.
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