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From Nilesh Vijaywargiay <>
Subject Re: Failed to create text index reader for .frq file
Date Thu, 17 Nov 2011 21:22:37 GMT
Hi Erick,

Last time, processing the case again on a different box didn't give the
missing file error. But now, after two months, we see this again. We are
using lucene 2.x and java 1.x I believe.

I am wondering as to why does lucene need this .frq file as we have never
seen this issue in house, but only at customers place. Is it optional and
if yes, how can I avoid lucene using it? We do not have access to the index
thus finding difficult to understand the core reason.

Do you know which code path in lucene triggers this demand for .frq file?


On Tue, Sep 6, 2011 at 3:04 PM, Erick Erickson <>wrote:

> Hmmm, it rather looks like somehow some of your
> index files got deleted from your index directory.
> a .frq file is one of the files that contains document
> frequency information. The fact that Lucene
> can't find _166.frq indicates you've been using this
> index for a while and created a bunch of segments.
> There exists a program called checkindex that
> can be used to help figure out the state of your
> index. See:
> And if you're using Java7, you should be aware
> of:
> What happens if you point Luke at your index?
> Best
> Erick
> On Tue, Sep 6, 2011 at 3:33 PM, Nilesh Vijaywargiay
> <> wrote:
> > Hi,
> >
> > I am facing a error while processing a set of data.. the description says
> > "Failed to create text index reader for .../.../_166.frq (The System
> cannot
> > find the specified path).
> >
> > I have never seen this error in the past neither have I seen this file in
> > the index folder ever.  Does lucene take care of this file or we need
> some
> > add-on or third party software for this particular file?
> >
> > Thanks
> >
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