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  1. Lucene - Core
  2. LUCENE-4955

NGramTokenFilter increments positions for each gram

Details

    • Bug
    • Status: Closed
    • Major
    • Resolution: Fixed
    • 4.3
    • 4.4, 6.0
    • modules/analysis
    • None
    • New

    Description

      NGramTokenFilter increments positions for each gram rather for the actual token which can lead to rather funny problems especially with highlighting. if this filter should be used for highlighting is a different story but today this seems to be a common practice in many situations to highlight sub-term matches.

      I have a test for highlighting that uses ngram failing with a StringIOOB since tokens are sorted by position which causes offsets to be mixed up due to ngram token filter.

      Attachments

        1. highlighter-test.patch
          4 kB
          Simon Willnauer
        2. highlighter-test.patch
          3 kB
          Simon Willnauer
        3. LUCENE-4955.patch
          42 kB
          Adrien Grand
        4. LUCENE-4955.patch
          12 kB
          Simon Willnauer

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              jpountz Adrien Grand
              simonw Simon Willnauer
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              Dates

                Created:
                Updated:
                Resolved: