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From "paul.elschot (JIRA)" <>
Subject [jira] Updated: (LUCENE-569) NearSpans skipTo bug
Date Wed, 21 Jun 2006 22:20:30 GMT
     [ ]

paul.elschot updated LUCENE-569:

    Attachment: common-build.assertions.patch

common-build.assertions.patch enables assertions in org.apache.lucene during the junit tests. is refactored from the previous version of 2 days ago.
It contains some assert statements.

All tests pass here as before with these two attachments.

> NearSpans skipTo bug
> --------------------
>          Key: LUCENE-569
>          URL:
>      Project: Lucene - Java
>         Type: Bug

>   Components: Search
>     Reporter: Hoss Man
>  Attachments:,,,
SpanScorer.explain.testcase.patch,, common-build.assertions.patch
> NearSpans appears to have a bug in skipTo that causes it to skip over some matching documents
completely.  I discovered this bug while investigating problems with SpanWeight.explain, but
as far as I can tell the Bug is not specific to Explanations ... it seems like it could potentially
result in incorrect matching in some situations where a SpanNearQuery is nested in another
query such thatskipTo will be used ... I tried to create a high level test case to exploit
the bug when searching, but i could not.  TestCase exploiting the class using NearSpan and
SpanScorer will follow...

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