Please can you provide the version of gateway you are running, form factor being used (VMware OVA, AMI, Software, etc) and the filename of the OAM RPM. I would also validate that the /etc/hosts file has entries for localhost.
127.0.0.1 localhost localhost.localdomain localhost4 localhost4.localdomain4
::1 localhost localhost.localdomain localhost6 localhost6.localdomain6
Sincerely,
Stephen Hughes
Director, CA Support