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From "David Smiley (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (LUCENE-7719) UnifiedHighlighter doesn't handle some AutomatonQuery's with multi-byte chars
Date Wed, 05 Apr 2017 17:58:41 GMT

     [ https://issues.apache.org/jira/browse/LUCENE-7719?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

David Smiley updated LUCENE-7719:
---------------------------------
    Priority: Minor  (was: Major)

> UnifiedHighlighter doesn't handle some AutomatonQuery's with multi-byte chars
> -----------------------------------------------------------------------------
>
>                 Key: LUCENE-7719
>                 URL: https://issues.apache.org/jira/browse/LUCENE-7719
>             Project: Lucene - Core
>          Issue Type: Bug
>          Components: modules/highlighter
>            Reporter: David Smiley
>            Assignee: David Smiley
>            Priority: Minor
>         Attachments: LUCENE_7719.patch
>
>
> In MultiTermHighlighting, a CharacterRunAutomaton is being created that takes the result
of AutomatonQuery.getAutomaton that in turn is byte oriented, not character oriented.  For
ASCII terms, this is safe but it's not for multi-byte characters.  This is most likely going
to rear it's head with a WildcardQuery, but due to special casing in MultiTermHighlighting,
PrefixQuery isn't affected.  Nonetheless it'd be nice to get a general fix in so that MultiTermHighlighting
can remove special cases for PrefixQuery and TermRangeQuery (both subclass AutomatonQuery).
> AFAICT, this bug was likely in the PostingsHighlighter since inception.



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