Michael McCandless created LUCENE-4968:
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Summary: 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
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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