"lb_policy": "LEAST_REQUEST",
            "circuit_breakers": {
              "thresholds": [
                {
                  "max_connections": 4294967295,
                  "max_pending_requests": 4294967295,
                  "max_requests": 4294967295,
                  "max_retries": 4294967295,
                  "track_remaining": true
                }
              ]
            },