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https://issues.apache.org/jira/browse/LUCENE-4968?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Michael McCandless updated LUCENE-4968:
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Attachment: LUCENE-4968.patch
Patch.
> Several ToParentBlockJoinQuery/Collector issues
> -----------------------------------------------
>
> Key: LUCENE-4968
> URL: https://issues.apache.org/jira/browse/LUCENE-4968
> Project: Lucene - Core
> Issue Type: Bug
> Components: modules/join
> Reporter: Michael McCandless
> Assignee: Michael McCandless
> Fix For: 5.0, 4.4
>
> Attachments: LUCENE-4968.patch
>
>
> I hit several issues with ToParentBlockJoinQuery/Collector:
> * If a given Query sometimes has no child matches then we could hit
> AIOOBE, but should just get 0 children for that parent
> * TPBJC.getTopGroups incorrectly throws IllegalArgumentException
> when the child query happens to have no matches
> * We have checks that user didn't accidentally pass a child query
> that matches parent docs ... they are only assertions today but I
> think they should be real checks since it's easy to screw up
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