Not to get an error CLONE-20372 when adcfgclone.pl is run, ensure that the variable T2P_JAVA_OPTIONS is set to define a temporary port range for weblogic to start.
export T2P_JAVA_OPTIONS=”-Dt2p.temporary.port.range=5001-5050″
This is the MOS https://support.oracle.com/epmos/faces/DocContentDisplay?id=2002613.1