How To Resolve EBS 19c DbTechStack Cloning Issues On Red Hat Enterprise Linux 8.10 (perl Adcfgclone.pl DbTechStack)

ISSUE:

While running perl adcfgclone.pl dbTechStack, Cloning EBS integerated 19c Database TechStack Fails on supported OS Check with Red Hat Linux 8.10

CAUSE:

19c does not contain Pre-req checks specific to Oracle Linux 8 / Red Hat Linux 8.10
Silent Installer will fail with below Error,as there are no Pre-req checks specific to Linux 8.

SHOW STOPPER ERROR:

[WARNING] [INS-08101] Unexpected error while executing the action at state:’supportedOSCheck’
CAUSE: No additional information available.
ACTION: Contact Oracle Support Services or refer to the software manual.
SUMMARY:
– java.lang.NullPointerException

SOLUTION:

Hence,there is a need to direct the Installer to assume the installed OS to be OL 7 & perform related checks.
Therefore,the below Variable needs to be set,prior to launching Installer-

export CV_ASSUME_DISTID=OEL7.8

NOTE: As per Oracle Pre-req check file for OL/RHEL 8 is provided by 19c PSU 19.6 + but I faced this same issue in 19.22 still !