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From Ian Koelliker <>
Subject RE: index corruption with Lucene 2.9.4
Date Thu, 15 Jan 2015 19:01:06 GMT
Thanks for the information. We are going to be upgrading to a newer version of Lucene, but
we cannot upgrade to version 4.x yet due to the fact that 4.x cannot read older index formats.
The best we can do currently is upgrade to the latest 3.x which appears to have the same problem.

-----Original Message-----
From: Michael McCandless [] 
Sent: Thursday, January 15, 2015 12:51 PM
To: Lucene Users
Subject: Re: index corruption with Lucene 2.9.4

Is your index on a remote file system?

You could be hitting

Best to upgrade Lucene (we stopped relying on File.exists a while back).

Mike McCandless

On Thu, Jan 15, 2015 at 12:10 PM, Ian Koelliker <> wrote:
> Hello,
> We are seeing some weird instances of index corruption periodically when using Lucene
2.9.4. There are two specific cases we are seeing.
> 1)      We are using the compound format and have noticed that sometimes we get errors
when searching noting that files are missing (i.e. .fnm, .fdt, etc.) even though we have a
.cfs file
> 2)      We have an index that is searchable but it appears that the stored terms for
some of the documents have been lost (i.e. searching is successful, but the expected stored
terms for those messages are not there). Running the CheckIndex tool on this index fails.
> Any ideas how these scenarios could occur? Are there any known issues in Lucene 2.9.4
that would cause this to happen?
> Thanks,
> Ian

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