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From "Yonik Seeley" <>
Subject Re: duplicate entries being returned, possible caching issue?
Date Sun, 03 Feb 2008 16:12:15 GMT
I would guess you are seeing a view of the index after adding some
documents but before the duplicates have been removed.  Are you using
Solr's replication scripts?


On Feb 1, 2008 6:01 PM, Rachel McConnell <> wrote:
> We have just started seeing an intermittent problem in our production
> Solr instances, where the same document is returned twice in one
> request.  Most of the content of the response consists of duplicates.
> It's not consistent; maybe 1/3 of the time this is happening and the
> rest of the time, one return document is sent per actual Solr
> document.
> We recently made some changes to our caching strategy, basically to
> increase the values across the board.  This is the only change to our
> Solr instance for quite some time.
> Our production system consists of the following:
> * 'write', a Solr server used as the master index, optimized for
> writes.  all 3 application servers use this
> * 'read1' & 'read2', Solr servers optimized for reads, which synch
> from the master every 20 minutes.  these two are behind a pound load
> balancer.  Two application servers use these for searching.
> * 'read3', a Solr server identical to read1 & read2, but which is not
> load balanced, and used by only one application server.
> Has anyone any ideas how to start debugging this?  What information
> should I be looking for that could shed some light on this?
> Thanks for any advice,
> Rachel

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