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https://issues.apache.org/jira/browse/LUCENE-6500?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14558911#comment-14558911
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Uwe Schindler commented on LUCENE-6500:
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Here is the problem, why the patch is problematic:
The current logic is fine, but fails - as Adrien says - when you have a
ParallelMultiReader on a MultiReader of another CompositeReaders.
His fix works fine, if you have closeSubReader=false on the parallel on and
also on the child MultiReaders. in that case it will fail with too many decRefs.
I am not sure how the best fix looks like. It this issue urgent? I have to
think a night about it :-) I would prefer to have a better solution alltgether,
this refcounting is horrible...
> ParallelCompositeReader does not always call closed listeners
> -------------------------------------------------------------
>
> Key: LUCENE-6500
> URL: https://issues.apache.org/jira/browse/LUCENE-6500
> Project: Lucene - Core
> Issue Type: Bug
> Reporter: Adrien Grand
> Assignee: Adrien Grand
> Priority: Minor
> Attachments: LUCENE-6500.patch
>
>
> CompositeParallelReader misses to call closed listeners when the reader which
> is provided at construction time does not wrap leaf readers directly, such as
> a multi reader over directory readers.
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