Description
Restconf throws an error when there is no output for the invoked action. But actions with no output are absolutely legal and according to RFC 8040 (section: 3.6. Operation Resource):
"If the RPC operation is invoked without errors and if the "rpc" or "action" statement has no "output" section, the response message MUST NOT include a message-body and MUST send a "204 No Content" status-line instead."