I ran into this issue where the JBoss container shut down even after successfully deploying LCS.war in the console. This is not a LR issue per se because I've been able to start up portal and DXP on JBoss EAP for years following the official docs and KB.
12:21:13,956 ERROR [org.jboss.as.controller.management-operation] (Controller Boot Thread) JBAS013412: Timeout after  seconds waiting for service container stability. Operation will roll back. Step that first updated the service container was 'add' at address '[("interface" => "management")]'
A quick search returned this: https://access.redhat.com/solutions/1190323
Consider updating the documentation to add
<property name="jboss.as.management.blocking.timeout" value="600"/>