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From "Michael McCandless (JIRA)" <j...@apache.org>
Subject [jira] Reopened: (LUCENE-1453) When reopen returns a new IndexReader, both IndexReaders may now control the lifecycle of the underlying Directory which is managed by reference counting
Date Wed, 10 Jun 2009 10:56:07 GMT

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

Michael McCandless reopened LUCENE-1453:
----------------------------------------


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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