Ambari 2.1 Does Not Support Optional Services

Description
Horton HDP 2.3.2 VM installs with Ambari 2.1, which does not support optional arguments for custom services. This prevents successful operation of the Arcadia Enterprise service. This is a known issue for Ambari 2.1.
Workaround
After installing Horton HDP 2.3.2 and higher, upgrade Ambari as described in Upgrade Ambari.
Domain
Install and Upgrade