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From Otis Gospodnetic <otis_gospodne...@yahoo.com>
Subject Re: IndexReader In a MultiThreaded Env
Date Wed, 16 Apr 2003 20:28:09 GMT
I don't think so.  However, this sounds like a scenario in which you
should make your 2 threads communicate.  Either through JVM or even
something as simple as "I'm done building the index" file.

Otis

--- Rob Outar <routar@ideorlando.org> wrote:
> Hi all,
> 
> 	I think I tracked down what was a nasty bug.  I have 2 threads, my
> program
> works in the following way, the first time a user tries to access the
> index,
> if an index does not exists then one is built, otherwise if one is
> there it
> simply uses it.
> 
> 	Thread 1 comes along and he tries to query, no index exists
> (ndexReader.indexExists(File directory) method) so one is now being
> built.
> 
> 	Thread 2 comes along he checks if an index exists via the
> IndexReader.indexExists(File directory) method <-- it returns true
> since all
> the method does is File.exists().  Since thread one caused an index
> to be
> built Thread 2 thinks that it is a usable index and tries to run
> queries and
> modify the index -- all of which fail because the index is still
> being
> built.
> 
> 	Is there any method that checks more than if the index directory
> simply
> exists?  Is there way to make sure the index is valid before using
> it?
> 
> 	Let me know.
> 
> Rob
> 
> 
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