The Tomcat has a correct certificate for the SSL communication but when executing the JNLP, an Alert of non trusted communication is displayed in a popup:
Do you want to continue?
The certificate is not valid and cannot be used to verify the identity of this website
The involved certificate seems correct, the serial number is ok.
Self-signed or internally signed certs are not automatically trusted by Java
Release : 6.10
In the case of self-signed or internally signed certs the entire certification chain needs to be imported in <java>\jre\lib\security\cacerts