[ https://issues.apache.org/jira/browse/JCR-1041?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#action_12524997 ] 

Christoph Kiehl commented on JCR-1041:
--------------------------------------

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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