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Posted to issues@lucene.apache.org by "Jack Mazanec (Jira)" <ji...@apache.org> on 2022/08/04 20:04:00 UTC
[jira] [Created] (LUCENE-10674) BitSetConjunctionDISI iterators fall out of sync when lead doc >= minlength of bitsets
Jack Mazanec created LUCENE-10674:
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Summary: BitSetConjunctionDISI iterators fall out of sync when lead doc >= minlength of bitsets
Key: LUCENE-10674
URL: https://issues.apache.org/jira/browse/LUCENE-10674
Project: Lucene - Core
Issue Type: Bug
Components: core/search
Affects Versions: 9.3, 9.2, 9.1, 9.0
Reporter: Jack Mazanec
In [BitSetConjunctionDISI.doNext()|https://github.com/apache/lucene/blob/releases/lucene/9.3.0/lucene/core/src/java/org/apache/lucene/search/ConjunctionDISI.java#L283-L285][,|https://github.com/apache/lucene/blob/releases/lucene/9.3.0/lucene/core/src/java/org/apache/lucene/search/ConjunctionDISI.java#L283-L285],] if the lead doc is greater than or equal to the length of any of the BitSets, NO_MORE_DOCS is returned.
On subsequent calls to [BitSetConjunctionDISI.docId()](https://github.com/apache/lucene/blob/releases/lucene/9.3.0/lucene/core/src/java/org/apache/lucene/search/ConjunctionDISI.java#L263), the lead's docID which is not exhausted will be returned.
I think this could be fixed by calling lead.advance(NO_MORE_DOCS) before returning NO_MORE_DOCS in doNext.
Related issue: https://issues.apache.org/jira/browse/LUCENE-9541
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