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  1. Lucene - Core
  2. LUCENE-7719

UnifiedHighlighter doesn't handle some AutomatonQuery's with multi-byte chars

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    Details

    • Type: Bug
    • Status: Resolved
    • Priority: Minor
    • Resolution: Fixed
    • Affects Version/s: None
    • Fix Version/s: 7.0
    • Component/s: modules/highlighter
    • Labels:
      None
    • Lucene Fields:
      New

      Description

      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.

        Attachments

        1. LUCENE_7719.patch
          20 kB
          David Smiley

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              • Assignee:
                dsmiley David Smiley
                Reporter:
                dsmiley David Smiley
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                • Created:
                  Updated:
                  Resolved: