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From "Michael Stoppelman" <stop...@gmail.com>
Subject Lucene 2.0.0 index being zeroed out by Lucene 2.2.0.
Date Fri, 22 Jun 2007 00:47:22 GMT
Hi all,

My index is being zeroed out by the new lucene core jar.

Here's the deal:
I've got an old index from lucene-core-2.0.0 jar. I start up my service with
the new lucene 2.2.0 jar and everything
is fine. When I add a document to the index the everything is still fine.
Yet when I shut down my service and
restart, lucene-core-2.2.0 clears out my index, poof index gone. I've looked
into this a little, it seems that once
I've added a new item to an old index I get two new files in the index
directory that look like this:

-rw-r--r--    1 stop     users          70 2007-06-21 17:29 segments_3
-rw-r--r--    1 stop     users          20 2007-06-21 17:29 segments.gen

If I copy in my old index into the index directory with these files present
and start up my search service the old index
will disappear.

This means, if I startup with the following index directory (_1ssra is the
old lucene 2.0.0 index):
-rw-r--r--    1 stop     users          19 2007-06-21 17:29 _1ssra_1.del
-rw-r--r--    1 stop     users    947083649 2007-06-21 17:25 _1ssra.cfs
-rw-r--r--    1 stop     users       71253 2007-06-21 17:29 _1ssrb.cfs
-rw-r--r--    1 stop     users          70 2007-06-21 17:29 segments_3
-rw-r--r--    1 stop     users          20 2007-06-21 17:29 segments.gen

I end up with these files left after startup:
-rw-r--r--    1 stop     users          20 2007-06-21 17:30 segments_1
-rw-r--r--    1 stop     users          20 2007-06-21 17:30 segments.gen
-rw-r--r--    1 stop     users           0 2007-06-21 17:30 write.lock

>From the lucene website, it says "Adding to an index with an older format
will cause it to be converted to the newer format."
Has anyone else seen lucene-core-2.2.0.jar nuke your old index? Am I
supposed to convert my index using a command-line tool?

-M

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