Failed to put kerberos descriptor via REST API

[Fay Wang]

Thanks, Rob, for the info!

I am able to get the default kerberos descriptor via REST api, but 
get an error when issuing the following command to update the descriptor:
curl -H "X-Requested-By:ambari" -u admin:admin -i -X PUT -d 
@/tmp/descriptor_update.json 
http://localhost:8080/api/v1/clusters/MyCluster/artifacts/kerberos_descriptor 

HTTP/1.1 100 Continue

HTTP/1.1 404 Not Found
User: admin
Set-Cookie: AMBARISESSIONID=ia3j9lvqclb6fytb01x5c2vl;Path=/;Secure;HttpOnly
Expires: Thu, 01 Jan 1970 00:00:00 GMT
Content-Type: text/plain
Content-Length: 244
Server: Jetty(8.1.17.v20150415)

{
  "status" : 404,
  "message" : "org.apache.ambari.server.controller.spi.NoSuchResourceException: 
The requested resource doesn't exist: Artifact not found, 
Artifacts/cluster_name=MyCluster AND 
Artifacts/artifact_name=kerberos_descriptor"
}

The content of /tmp/descriptor_update.json:
{
  "artifact_data" : {
    "services" : [
      {
        "configurations" : [
          {
            "core-site" : {
              "hadoop.proxyuser.HTTP.hosts" : "*"
            }
          }
        ],
        "name" : "HIVE"
      }
    ]
  }
}

Thanks in advance for the help!
-fay