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Posted to dev@lucene.apache.org by "Alan Woodward (JIRA)" <ji...@apache.org> on 2018/01/11 09:32:00 UTC
[jira] [Reopened] (LUCENE-8121) UnifiedHighlighter can highlight
terms within SpanNear clauses at unmatched positions
[ https://issues.apache.org/jira/browse/LUCENE-8121?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Alan Woodward reopened LUCENE-8121:
-----------------------------------
Seeing lots of test failures due to this, specifically in TestUnifiedHighlighterStrictPhrases
> 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
>
> Attachments: LUCENE-2287_UH_SpanCollector.patch, LUCENE-2287_UH_SpanCollector.patch
>
>
> 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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