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From "Devon H. O'Dell" <>
Subject Re: IndexReader#reopen() on externally changed index
Date Mon, 17 Oct 2011 02:38:06 GMT
In my experience, reopen will find all changes on an index, whether it was
modified by the same process or not. If you're replicating over a network,
you might need some barrier / lock around the reopen call to make sure the
replicated index is complete. Obviously with something as fickle as a
network, you may need some extra protection around this. It has worked best
for me to replicate using IndexWriter wrapping some transport protocol.

On Oct 16, 2011 10:33 PM, "Denis Bazhenov" <> wrote:

> We have situation when lucene index is replicated over network. And on that
> machine reader reopen doesn't make new documents visible to a search.
> As far as I know IndexReader.reopen() call does work only if changes are
> applied using the linked IndexWriter. My question is: how can I implement
> efficient index reopen (only new segments should be read) when index is
> changed externally?
> ---
> Denis Bazhenov <>
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