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From "Uwe Schindler (JIRA)" <>
Subject [jira] Resolved: (LUCENE-1877) Use NativeFSLockFactory as default for new API (direct ctors &
Date Thu, 03 Sep 2009 22:18:57 GMT


Uwe Schindler resolved LUCENE-1877.

    Resolution: Fixed

Committed revision: 811157

> Use NativeFSLockFactory as default for new API (direct ctors &
> --------------------------------------------------------------------------
>                 Key: LUCENE-1877
>                 URL:
>             Project: Lucene - Java
>          Issue Type: Improvement
>          Components: Javadocs
>            Reporter: Mark Miller
>            Assignee: Uwe Schindler
>             Fix For: 2.9
>         Attachments: LUCENE-1877.patch, LUCENE-1877.patch, LUCENE-1877.patch, LUCENE-1877.patch
> A user requested we add a note in IndexWriter alerting the availability of NativeFSLockFactory
(allowing you to avoid retaining locks on abnormal jvm exit). Seems reasonable to me - we
want users to be able to easily stumble upon this class. The below code looks like a good
spot to add a note - could also improve whats there a bit - opening an IndexWriter does not
necessarily create a lock file - that would depend on the LockFactory used.
> {code}  <p>Opening an <code>IndexWriter</code> creates a lock file
for the directory in use. Trying to open
>   another <code>IndexWriter</code> on the same directory will lead to a
>   {@link LockObtainFailedException}. The {@link LockObtainFailedException}
>   is also thrown if an IndexReader on the same directory is used to delete documents
>   from the index.</p>{code}
> Anyone remember why NativeFSLockFactory is not the default over SimpleFSLockFactory?

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