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From "Michael McCandless (JIRA)" <j...@apache.org>
Subject [jira] Commented: (LUCENE-2476) Constructor of IndexWriter let's runtime exceptions pop up, while keeping the writeLock obtained
Date Tue, 25 May 2010 15:39:24 GMT

    [ https://issues.apache.org/jira/browse/LUCENE-2476?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12871201#action_12871201
] 

Michael McCandless commented on LUCENE-2476:
--------------------------------------------

I agree, we should fix this.  I'll change to a try/finally w/ a success boolean.

You can use IndexWriter#unlock to forcefully remove the lock, as a workaround.

> Constructor of IndexWriter let's runtime exceptions pop up, while keeping the writeLock
obtained
> ------------------------------------------------------------------------------------------------
>
>                 Key: LUCENE-2476
>                 URL: https://issues.apache.org/jira/browse/LUCENE-2476
>             Project: Lucene - Java
>          Issue Type: Bug
>          Components: Store
>    Affects Versions: 3.0.1
>            Reporter: Cservenak, Tamas
>            Priority: Blocker
>             Fix For: 3.1, 4.0
>
>
> Constructor of IndexWriter let's runtime exceptions pop up, while keeping the writeLock
obtained.
> The init method in IndexWriter catches IOException only (I got NegativeArraySize by reading
up a _corrupt_ index), and now, there is no way to recover, since the writeLock will be kept
obtained. Moreover, I don't have IndexWriter instance either, to "grab" the lock somehow,
since the init() method is called from IndexWriter constructor.
> Either broaden the catch to all exceptions, or at least provide some circumvention to
clear up. In my case, I'd like to "fallback", just delete the corrupted index from disk and
recreate it, but it is impossible, since the LOCK_HELD NativeFSLockFactory's entry about obtained
WriteLock is _never_ cleaned out and is no (at least apparent) way to clean it out forcibly.
I can't create new IndexWriter, since it will always fail with LockObtainFailedException.

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