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https://issues.apache.org/jira/browse/LUCENE-5362?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13842471#comment-13842471
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ASF subversion and git services commented on LUCENE-5362:
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Commit 1549012 from [~simonw] in branch 'dev/trunk'
[ https://svn.apache.org/r1549012 ]
LUCENE-5362: IndexReader and SegmentCoreReaders now throw
AlreadyClosedException if the refCount in incremented but is less that 1.
> IndexReader and friends should check ref count when incrementing
> ----------------------------------------------------------------
>
> Key: LUCENE-5362
> URL: https://issues.apache.org/jira/browse/LUCENE-5362
> Project: Lucene - Core
> Issue Type: Improvement
> Affects Versions: 4.6
> Reporter: Simon Willnauer
> Fix For: 5.0, 4.7
>
> Attachments: LUCENE-5362.patch, LUCENE-5362.patch
>
>
> IndexReader and SegmentCoreReaders blindly increments it's refcount which
> could already be counted down to 0 which might allow an IndexReader to "rise
> from the dead" and use an already closed SCR instance. Even if that is caught
> we should try best effort to raise ACE asap.
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