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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