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Posted to dev@lucene.apache.org by "Adam Ahmed (JIRA)" <ji...@apache.org> on 2011/06/08 07:38:58 UTC
[jira] [Commented] (LUCENE-91) IndexWriter ctor does not release
lock on exception
[ https://issues.apache.org/jira/browse/LUCENE-91?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13045794#comment-13045794 ]
Adam Ahmed commented on LUCENE-91:
----------------------------------
Please note that this also happens when Lock.obtain times out. As far as I can tell, the only way to avoid that possibility is to LOCK_OBTAIN_WAIT_FOREVER, and "forever" generally sounds like a bad idea. I would say that is a bug, and more clearly so than exceptions due to the index not existing.
> IndexWriter ctor does not release lock on exception
> ---------------------------------------------------
>
> Key: LUCENE-91
> URL: https://issues.apache.org/jira/browse/LUCENE-91
> Project: Lucene - Java
> Issue Type: Bug
> Components: core/index
> Affects Versions: 1.2
> Environment: Operating System: All
> Platform: All
> Reporter: Alex Staubo
> Assignee: Lucene Developers
>
> If IndexWriter construction fails with an exception, the write.lock lock is not
> released.
> For example, this happens if one tries to open an IndexWriter on an FSDirectory
> which does not contain an Lucene index. FileNotFoundException will be thrown by
> org.apache.lucene.store.FSInputStream, after which the write lock will remain in
> the directory, and nobody can open the index.
> I have been using this pattern -- doing IndexWriter(..., false), catching
> FileNotFoundException and doing IndexWriter(..., true) -- in my code to
> initialize the index on demand, because the app never know if the index already
> exists.
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