That's the connection URL, not the driver. But, since the subprotcol is
"as400", that tells me it's the Toolbox driver. As a Type 4, "thin" driver, it does use TCP/IP.
In your case, given your solution, it seems to apply to Tomcat
initialization not being complete when access is attempted. Don't know if
that applies to the OP. Vielen Dank!