Hi Mark,
thanks for your answer. See comments.
>
> Stefan,
>
> Something is closing the network connection abrubtly between JDBC and
> your MySQL server. Things to check are:
>
> 1) Connections don't sit longer than 'wait_timeout' on the server.
I am actually using connection pooling (the torque system, in case you know 
this). After I get this error, my app is still running fine, and also doing 
dtabase queries. Something interesting: When I do a query ... where x like 
"%y%" the error occurs. Doing where x regexp "y" works fine, even if I do the 
regular expression query after the like one, without restarting server or 
similar things.
> 2) If the mysql server is on a different machine than your application:
Same machine
>   2a) There are no network hardware issues
>   2b) There isn't a firewall between the server and your application
> that times-out connections
> 3) MySQL isn't crashing in between queries (see your mysql server error
> log)
Nothing in the log
>
>       -Mark
>
> --
> Mark Matthews
> MySQL AB, Software Development Manager - Connectivity
> www.mysql.com

-- 
Stefan Kuhn M. A.
Cologne University BioInformatics Center (http://www.cubic.uni-koeln.de)
Zülpicher Str. 47, 50674 Cologne
Tel: +49(0)221-470-7428   Fax: +49 (0) 221-470-7786
My public PGP key is available at http://pgp.mit.edu

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