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From "paul.elschot (JIRA)" <j...@apache.org>
Subject [jira] Updated: (LUCENE-569) NearSpans skipTo bug
Date Wed, 21 Jun 2006 22:20:30 GMT
     [ http://issues.apache.org/jira/browse/LUCENE-569?page=all ]

paul.elschot updated LUCENE-569:
--------------------------------

    Attachment: common-build.assertions.patch
                NearSpansOrdered.java

common-build.assertions.patch enables assertions in org.apache.lucene during the junit tests.

NearSpansOrdered.java 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: http://issues.apache.org/jira/browse/LUCENE-569
>      Project: Lucene - Java
>         Type: Bug

>   Components: Search
>     Reporter: Hoss Man
>  Attachments: NearSpansOrdered.java, NearSpansOrdered.java, NearSpansUnordered.java,
SpanScorer.explain.testcase.patch, TestNearSpans.java, 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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