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From "Uwe Schindler (JIRA)" <>
Subject [jira] Commented: (LUCENE-2104) IndexWriter.unlock does does nothing if NativeFSLockFactory is used
Date Tue, 25 May 2010 16:14:24 GMT


Uwe Schindler commented on LUCENE-2104:

Should I backport?

> IndexWriter.unlock does does nothing if NativeFSLockFactory is used
> -------------------------------------------------------------------
>                 Key: LUCENE-2104
>                 URL:
>             Project: Lucene - Java
>          Issue Type: Bug
>          Components: Store
>    Affects Versions: 2.9, 2.9.1, 3.0
>            Reporter: Shai Erera
>            Assignee: Uwe Schindler
>            Priority: Minor
>             Fix For: 3.1, 4.0
>         Attachments: LUCENE-2104.patch, LUCENE-2104.patch, LUCENE-2104.patch
> If NativeFSLockFactory is used, IndexWriter.unlock will return, silently doing nothing.
The reason is that NativeFSLockFactory's makeLock always creates a new NativeFSLock. NativeFSLock's
release first checks if its lock is not null. However, only if obtain() is called, that lock
is not null. So release actually does nothing, and so IndexWriter.unlock does not delete the
lock, or fail w/ exception.
> This is only a problem in NativeFSLock, and not in other Lock implementations, at least
as I was able to see.
> Need to think first how to reproduce in a test, and then fix it. I'll work on it.

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