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https://issues.apache.org/jira/browse/LUCENE-1453?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12717660#action_12717660
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Uwe Schindler commented on LUCENE-1453:
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Both patches are the same, the second one is just using FSDir.open() instead of
FSDir.getDirectory. For committing, I would use getDirectory(), the first
patch. FSDir.open() would change behaviour for uses relying on the System
property to specify the directory impl.
> When reopen returns a new IndexReader, both IndexReaders may now control the
> lifecycle of the underlying Directory which is managed by reference counting
> ---------------------------------------------------------------------------------------------------------------------------------------------------------
>
> Key: LUCENE-1453
> URL: https://issues.apache.org/jira/browse/LUCENE-1453
> Project: Lucene - Java
> Issue Type: Bug
> Affects Versions: 2.4
> Reporter: Mark Miller
> Assignee: Michael McCandless
> Priority: Minor
> Fix For: 2.4.1, 2.9
>
> Attachments: Failing-testcase-LUCENE-1453.patch,
> LUCENE-1453-with-FSDir-open.patch, LUCENE-1453.patch, LUCENE-1453.patch,
> LUCENE-1453.patch, LUCENE-1453.patch
>
>
> Rough summary. Basically, FSDirectory tracks references to FSDirectory and
> when IndexReader.reopen shares a Directory with a created IndexReader and
> closeDirectory is true, FSDirectory's ref management will see two decrements
> for one increment. You can end up getting an AlreadyClosed exception on the
> Directory when the IndexReader is open.
> I have a test I'll put up. A solution seems fairly straightforward (at least
> in what needs to be accomplished).
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