JDBC driver binaries have to be available on every cluster node to allow class loading in the JVM. Since MashZone NextGen version 9.10 the binaries are stored in the DB and restored in <MashZoneNG-installation>\apache-tomcat\webapps\mashzone\WEB-INF\config\db\jdbc on all cluster nodes if not available. Automatic class loading on demand works fine, so that no further steps have to be taken to make JDBC resources available in a clustered scenario.