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https://issues.apache.org/jira/browse/JCR-1041?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#action_12524997
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Christoph Kiehl commented on JCR-1041:
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Fixed a little bug in ChildAxisScorer.skipTo() in revision 572885 as suggested
by Ard Schrijvers in
http://www.nabble.com/AIOOBE-in-ChildAxisScorer-in-jackrabbit-trunk-tf4376105.html
> Avoid using BitSets in ChildAxisQuery to minimize memory usage
> --------------------------------------------------------------
>
> Key: JCR-1041
> URL: https://issues.apache.org/jira/browse/JCR-1041
> Project: Jackrabbit
> Issue Type: Improvement
> Components: query
> Affects Versions: 1.3
> Reporter: Christoph Kiehl
> Assignee: Christoph Kiehl
> Fix For: 1.4
>
> Attachments: avoid_using_bitsets.patch
>
>
> When doing ChildAxisQueries on large indexes the internal BitSet instance
> (hits) may consume a lot of memory because the BitSet is always as large as
> IndexReader.maxDoc(). In our case we had a query consisting of 7
> ChildAxisQueries which combined to a total of 14MB. Since we have multiple
> users executing this query simultaneously this caused an out of memory error.
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