Unable to use connectionpool with namedpipesocketfactory

I have an application that used to connect via the network (jdbc:mariadb:<thenode>:3306). This always works. The server is recently reconfigured to use named pipes. I could not get it working with the mariadb connector /J(2.0.3), the connectionpool seems to be created successfully, but I get a null value when opening a connection (no error ?!) In the past this has worked with the original mysql connector so I replaced the mariadb connector with the mysql connector and replaced 'org.mariadb.jdbc' with 'com.mysql.jdbc' in my code and now I can use the connectionpool again.

I could not find much information on named pipes in google. Any thoughts?