Netconf client cannot to internal netconf server

After letting the controller stabilize I issue

curl http://localhost:8080/restconf/config/opendaylight-inventory:nodes/node/controller-config/

Response:

{
"node": [

]
}
indicates that connection was not established. No errors in log.

Issuing
curl -v http://localhost:8080/restconf/config/opendaylight-inventory:nodes/node/controller-config/yang-ext:mount/

results in

• About to connect() to localhost port 8080 (#0)
• Trying 127.0.0.1... connected
  > GET /restconf/config/opendaylight-inventory:nodes/node/controller-config/yang-ext:mount/ HTTP/1.1
  > User-Agent: curl/7.22.0 (x86_64-pc-linux-gnu) libcurl/7.22.0 OpenSSL/1.0.1 zlib/1.2.3.4 libidn/1.23 librtmp/2.3
  > Host: localhost:8080
  > Accept: /
  >
  < HTTP/1.1 400 Bad Request
  < Server: Apache-Coyote/1.1
  < Cache-Control: private
  < Expires: Thu, 01 Jan 1970 01:00:00 CET
  < Content-Type: text/plain
  < Transfer-Encoding: chunked
  < Date: Fri, 02 May 2014 08:47:09 GMT
  < Connection: close
  <
• Closing connection #0
  Mount point does not contain any schema with modules.