[ http://issues.apache.org/jira/browse/LUCENE-456?page=all ]
Yonik Seeley updated LUCENE-456:
--------------------------------
Attachment: FieldDocSortedHitQueue_dups.txt
The problem is when docs are equal, the order is unspecified. That in
conjunction with the fact that Hits can do multiple searches under the covers,
leads to your document duplication.
Everything works fine after I apply the patch I'm attaching here, in addition
to the patch here:
http://issues.apache.org/jira/browse/LUCENE-453
And for good measure, the patch here:
http://issues.apache.org/jira/browse/LUCENE-374
> Duplicate hits and missing hits in sorted search
> ------------------------------------------------
>
> Key: LUCENE-456
> URL: http://issues.apache.org/jira/browse/LUCENE-456
> Project: Lucene - Java
> Type: Bug
> Components: Search
> Versions: 1.4
> Environment: JDK 1.4.2_06, probably OS independant, testet on Solaris 8 and
> Win2000
> Reporter: Martin Seitz
> Priority: Minor
> Attachments: FieldDocSortedHitQueue_dups.txt,
> TestCustomSearcherSort_1_4_3.java, TestCustomSearcherSort_HEAD.java
>
> If using a searcher that subclasses from IndexSearcher I get different result
> sets (besides the ordering of course). The problem only occurrs if the
> searcher is wrapped by (Parallel)MultiSearcher and the index is not too
> small. The number of hits returned by un unsorted and a sorted search are
> identical but the hits are referencing different documents. A closer look at
> the result sets revealed that the sorted search returns duplicate hits.
> I created test cases for Lucene 1.4.3 as well as for the head release. The
> problem showed up for both, the number of duplicates beeing bigger for the
> head realease. The test cases are written for package
> org.apache.lucene.search. There are messages describing the problem written
> to the console. In order to see all those hints the asserts are commented
> out. So dont't be confused if junit reports no errors. (Sorry, beeing a
> novice user of the bug tracker I don't see any means to attach the test cases
> on this screen. Let's see.)
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