License expired and caused the issue. Provided a new DevTest license and applied it which resolved the issue.
Below are the findings from logs, which helped finding the root cause of the issue.
. The Portal connects to Registry port 2010 the portal-grails-res-hub.log was getting these errors:
2020-12-21 16:59:01,345Z (11:59) [main] INFO com.ca.devtest.acl.servlet.filters.RemoteAuthenticationFilter - Trying to set up default registry. Attempts left: 10
2020-12-21 16:59:03,861Z (11:59) [main] INFO com.itko.lisa.net.ClientBase - No response from remote server RegistryClient [sn=tcp://SVRP000C5DF3:2010/Registry]
. The Registry connects to the Enterprise dashboard and the registry.log was getting this error:
2020-12-21 17:38:58,909Z (12:38) [main] ERROR com.itko.lisa.coordinator.TestRegistryImpl -
The Enterprise Dashboard Server at 'http://localhost:1506'
could not be contacted, and no current activation was found in the local
activation cache for this registry.
This registry will not be allowed to start until it can be activated by a
valid Enterprise Dashboard Server.
Please contact your DevTest System Administrator or contact
CA Customer Support for more information.
. The Enterprise dashboard was showing these errors:
2020-12-21 17:32:50,301Z (12:32) [main] ERROR dradis.Application - Exception: License is expired!