Connect engine JDBC is using a deprecated API that has been removed as of OpenJDK11. For compatibility with all newer systems, this dependency should be removed.
When you try to use connect engine JDBC you get the following error:
Got error 174 'Connecting: java.lang.NoClassDefFoundError: javax/xml/bind/DatatypeConverter rc=0' from CONNECT
This is because javax.xml.bind has been permenantly removed.
By adding the following outdated jar file onto the connect class path I have temporarily worked around the problem: