Execute this query to find all the service names with LONG as the service
type:
select NAME, NETWORK_NAME, CON_NAME, CLB_GOAL
from gv$active_services
where CLB_GOAL='LONG';
In the list of service names with LONG as the service type, ensure that the
non-default service name is not same as the PDB, CDB, or any SYS service
name.