org.apache.derby.client.am.DisconnectException: A network protocol error was encountered
These can be a bit complicated to diagnose, but there is a wealth of information about how to do so online at: http://wiki.apache.org/db-derby/ProtocolDebuggingTips
Please try to pursue this problem and gather more information. It's starting to sound like you might have found a new bug in Derby, so we may need to move this discussion over to the developer list at some point and see what help we can get there. thanks, bryan
