Hi,
This does indeed sound serious. Are you saying that you have a snapshot
(with committed documents) that is cleared when calling
IndexWriter.Optimize? Can you share it for reproduction purposes?
Are you using near-realtime indexing? What you describe could happen if
you were using nrt, and never called IndexWriter.Commit. The index would
indeed be cleared next time an writer is opened against the directory, a
step in clearing out unused index files. A kind of rollback of
non-commited changes.
// Simon
On 2012-11-20 16:45, Gerry Suggitt wrote:
Sorry to send this email directly to the developers, but I couldn't see any
other way of entering a defect.
My name is Gerry Suggitt and I work for Leafsprout Technologies, a company that
creates products for the Medical Information sector.
We have created a Master Patient Index using Lucene that works very well - we
are able to perform fuzzy matching and all the nice things that you want in a
MPI.
But something terrible just happened. Fortunately this occured in our own lab -
we have not yet released the product to the field.
Sometime over the weekend, the computers holding the Lucene database rebooted
(probably from a Windows upgrade). All of the Lucene databases were blown away!
Completely empty!
Recently, I had noticed the same thing when I was doing some testing, so it may
be related.
We are currently using version 2.9.4.1
What I was doing in my testing was taking a snapshot of the Lucene database
files (just a copy to another directory). I would run some tests which would
affect the database, so before continuing I would copy the snapshot back.
When I started the Lucene service, the database was blown away! Completely
empty!
I was able to determine what was doing this. At startup, I was performing an
optimize. This seems like a good time for me: At startup we know no client is
making demands on the system. When I commented out the call to optimize, the
database remained intact up startup.
The systems that lost their databases still had the call to optimize in them.
Please help!
