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Posted to dev@lucene.apache.org by "David Smiley (JIRA)" <ji...@apache.org> on 2018/01/06 15:37:00 UTC

[jira] [Created] (LUCENE-8121) UnifiedHighlighter can highlight terms within SpanNear clauses at unmatched positions

David Smiley created LUCENE-8121:
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             Summary: UnifiedHighlighter can highlight terms within SpanNear clauses at unmatched positions
                 Key: LUCENE-8121
                 URL: https://issues.apache.org/jira/browse/LUCENE-8121
             Project: Lucene - Core
          Issue Type: Bug
          Components: modules/highlighter
            Reporter: David Smiley
            Assignee: David Smiley
            Priority: Minor
             Fix For: 7.3


The UnifiedHighlighter (and original Highlighter) highlight phrases by converting to a SpanQuery and using the Spans start and end positions to assume that every occurrence of the underlying terms between those positions are to be highlighted.  But this is inaccurate; see LUCENE-5455 for a good example, and also LUCENE-2287.  The solution is to use the SpanCollector API which was introduced after the phrase matching aspects of those highlighters were developed. 



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