Andy Liu created SOLR-12242:
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Summary: UnifiedHighlighter does not work with Surround query
parser (SurroundQParser)
Key: SOLR-12242
URL: https://issues.apache.org/jira/browse/SOLR-12242
Project: Solr
Issue Type: Bug
Security Level: Public (Default Security Level. Issues are Public)
Components: highlighter
Affects Versions: 7.2.1
Reporter: Andy Liu
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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