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https://issues.apache.org/jira/browse/LUCENE-1453?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
 ]

Michael McCandless reopened LUCENE-1453:
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I'm seeing a failure in back-compat tests ("and test-tag 
-Dtestcase=TestIndexReader"):

{code}
    [junit] Testcase: 
testFalseDirectoryAlreadyClosed(org.apache.lucene.index.TestIndexReader): FAILED
    [junit] did not hit expected exception
    [junit] junit.framework.AssertionFailedError: did not hit expected exception
    [junit]     at 
org.apache.lucene.index.TestIndexReader.testFalseDirectoryAlreadyClosed(TestIndexReader.java:1514)
{code}

(I assume, but I'm not certain, it's from this fix...).

> 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: Uwe Schindler
>            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, 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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