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https://issues.apache.org/jira/browse/LUCENE-1877?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12749301#action_12749301
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Uwe Schindler commented on LUCENE-1877:
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For IndexWriter/IndexReader this hint is no longer needed (in Lucene 2.9), as
all methods taking String/File instead of Directory are deprecated and users
should create directory instances and then will automatically get to the place
where the LockFactory can be supplied.
The note should be added to FSDirectory instead.
> Improve IndexWriter javadoc on locking
> --------------------------------------
>
> Key: LUCENE-1877
> URL: https://issues.apache.org/jira/browse/LUCENE-1877
> Project: Lucene - Java
> Issue Type: Improvement
> Components: Javadocs
> Reporter: Mark Miller
> Priority: Trivial
> Fix For: 2.9
>
>
> 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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