We are planning to migrate one more environment to Red Hat.
Jaspersoft 8 has only been tested with the following:
RHEL 8.2, Suse Linux Enterprise Server 15 SP2, Ubuntu LTS 20.04
https://community.jaspersoft.com/documentation_pdf/jasperreports%C2%AE-server/tibco-jaspersoft-platform-support-guide-commercial-edition/?modal=1