java chat server causes named, ssh, httpd to become unresponsive!

Hello,

I am not sure if this is a java problem or a redhat problem.

I am running a chat server written in java called Bribble. I have
java2 1.4 installed under Fedora 1. When a client connects to this
server, at one point or another, several other daemons become
unresponsive. The httpd, named, sshd servers all stop working. Ping,
however, remains up. Thus I know the box is still operational. At
this point, I have to call my ISP to have the box rebooted.

Does anyone know what could be causing this problem? I find it very
strange that such a small chat server program could do such damage.
The chat server is started using: java -server -jar bribble.jar. It
does some mysql work in the background as well. I have read that this
may be related to IPv4/IPv6 issues. But I was hoping someone could
give some insight or pointer to what the problem may be.

Thanks!
julia