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https://issues.apache.org/jira/browse/LUCENE-1300?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12604334#action_12604334
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Mark Miller commented on LUCENE-1300:
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Okay, I clearly underestimated the difficulties of this due to
RemoteSearchable. I don't see how it can be done in any efficient manner when
you have to work off a Searchable, and obviously you can't do anything with
multiple Readers using the MultiSearcher on the client side, so it would seem
making the Query.combine method work is the only option...except that doing
such a thing would be really nasty I think.
> Negative wildcard searches on MultiSearcher not eliminating correctly.
> ----------------------------------------------------------------------
>
> Key: LUCENE-1300
> URL: https://issues.apache.org/jira/browse/LUCENE-1300
> Project: Lucene - Java
> Issue Type: Bug
> Components: Search
> Affects Versions: 2.1, 2.3, 2.3.1
> Environment: Windows XP, cygwin.
> Reporter: steve halsey
> Priority: Minor
> Attachments: TestMultiSearcherNegativeWildcardQueryExpansion.java,
> TestMultiSearcherNegativeWildcardQueryExpansionWorksWith151.java
>
>
> If you do a search for a negative wildcard query on a MultiSearcher where
> one of the searchers is empty e.g. "lucene -bug*" the hits returned
> incorrectly include articles with words that should be eliminated, e.g.
> "bug" and "bugs". This is because the query expansion is done on the index
> with docs in and the empty ndex *separately* and then combined as an OR to be
> run on the MultiSearcher. This incorrectly lets in docs that have the
> excluded wildcard terms, e.g. "bug" nd bugs". This bug would also show up
> with two indexes full of docs, and I can send a test to show that if
> required, but I think this test demonstrates the bug in the implest way.
> The attached class TestMultiSearcherNegativeWildcardQueryExpansion.java can
> be put in with other tests in org.apache.lucene.search and run and will fail,
> showing the bug exists.
> I have tested this bug with the currently unreleased 2.3.2 and the released
> 2.1 and 2.3.1 and it fails on all.
> With lucene-1.5-rc1 it passes (with mods to make it work with old API) see
> TestMultiSearcherNegativeWildcardQueryExpansionWorksWith151.java attachment.
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