MetadataProxyStatus (type)

{
  "id": "MetadataProxyStatus", 
  "module_id": "AggSvcMetadataProxy", 
  "properties": {
    "error_message": {
      "required": false, 
      "title": "Error message, if available", 
      "type": "string"
    }, 
    "proxy_status": {
      "description": "UP means the metadata proxy is working fine on both transport-nodes(if have); DOWN means the metadata proxy is is down on both transport-nodes(if have), hence the metadata proxy will not repsonse any metadata request; Error means error happens on transport-node(s) or no status is reported from transport-node(s). The metadata proxy may be working (or not working); NO_BACK means metadata proxy is working in one of the transport node while not in the other transport-node (if have). Hence if the metadata proxy in the working transport-node goes down, the metadata proxy will go down.", 
      "enum": [
        "UP", 
        "DOWN", 
        "ERROR", 
        "NO_BACKUP"
      ], 
      "required": true, 
      "type": "string"
    }, 
    "transport_nodes": {
      "description": "Order of the transport nodes is insensitive because Metadata Proxy is running in Active-Active mode among target transport nodes.", 
      "items": {
        "type": "string"
      }, 
      "required": true, 
      "title": "ids of transport nodes where this metadata proxy is running", 
      "type": "array"
    }
  }, 
  "type": "object"
}