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https://issues.apache.org/jira/browse/LUCENE-8492?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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David Smiley resolved LUCENE-8492.
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Resolution: Fixed
Assignee: David Smiley
Fix Version/s: 8.2
Debatable, but I filed this as an improvement to help highlight queries better.
> UnifiedHighlighter does not work with Surround query parser (SurroundQParser)
> -----------------------------------------------------------------------------
>
> Key: LUCENE-8492
> URL: https://issues.apache.org/jira/browse/LUCENE-8492
> Project: Lucene - Core
> Issue Type: Bug
> Components: modules/highlighter
> Affects Versions: 7.2.1
> Reporter: Andy Liu
> Assignee: David Smiley
> Priority: Major
> Fix For: 8.2
>
> Attachments: TestUnifiedHighlighterSurround.java
>
>
> I'm attempting to use the UnifiedHighlighter in conjunction with queries
> parsed by Solr's SurroundQParserPlugin. When doing so, the response yields
> empty arrays for documents that should contain highlighted snippets.
> I've attached a test for UnifiedHighlighter that uses the surround's
> QueryParser and preprocesses the query in a similar fashion as
> SurroundQParser, which results in test failure. When creating a SpanQuery
> directly (rather via surround's QueryParser), the test passes.
> The problem can be isolated to the code path initiated by
> UnifiedHighlighter.extractTerms(), which uses EMPTY_INDEXSEARCHER to extract
> terms from the query. After a series of method calls, we end up at
> DistanceQuery.getSpanNearQuery(), where
> {{((DistanceSubQuery)sqi.next()).addSpanQueries(sncf)}} fails silently and
> doesn't add any span queries.
> Another data point: If I hack UnifiedHighlighter and pass in a live
> IndexSearcher to extractTerms(), highlighting works.
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