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From "Uwe Schindler" <>
Subject RE: IndexWriters and write locks
Date Wed, 10 Nov 2010 17:57:46 GMT
This is because Lucene uses Native Filesystem Locks. The lock file itself is just a placeholder
which is not cleaned up on Ctrl-C. The lock is not the file itself, its *on* the file.

Uwe Schindler
H.-H.-Meier-Allee 63, D-28213 Bremen

> -----Original Message-----
> From: Pulkit Singhal []
> Sent: Wednesday, November 10, 2010 3:38 PM
> To:
> Subject: IndexWriters and write locks
> Hello,
> 1) On Windows, I often shut down my application server (which has active
> IndexWriters open) using the ctrl+c keys.
> 2) I inspect my directories on the file system I see that the write.lock file is still
> there.
> 3) I start the app server again, and do some operations that would require
> IndexWriters to write to the same directories again and it works!
> I don't understand why I do not run into any exceptions?
> I mean there is already a lock file present which should prevent the
> IndexWriters from getting access to the directories ... no?
> I should be happy but I'm not because other folks are able to get exceptions
> when they bounce their servers an I'm unable to reproduce the problem and I
> can't help them.
> Any clues? Anyone?
> Thank You,
> - Pulkit

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