Remove FieldMaskingSpanQuery (or fix its scoring)
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Key: LUCENE-3723
URL: https://issues.apache.org/jira/browse/LUCENE-3723
Project: Lucene - Java
Issue Type: Bug
Affects Versions: 4.0
Reporter: Robert Muir
Attachments: LUCENE-3723_test.patch
In Lucene 4.0 we added new scoring mechanisms, but FieldMaskingSpanQuery is a
serious problem:
Because it lies about the fields of its terms, this sometimes results in
totally bogus
statistics, cases where a single terms totalTermFreq exceeds sumTotalTermFreq
for the entire field (since its lying about it).
Such lying could result in NaN/Inf/Negative scores, exceptions, divide by zero,
and other problems,
because the statistics are impossibly bogus.
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