string(6) "error:"
object(stdClass)#420 (3) {
  ["metadata"]=>
  array(4) {
    ["date"]=>
    array(1) {
      [0]=>
      string(29) "Mon, 21 Sep 2020 18:16:23 GMT"
    }
    ["server"]=>
    array(1) {
      [0]=>
      string(11) "istio-envoy"
    }
    ["x-envoy-upstream-service-time"]=>
    array(1) {
      [0]=>
      string(3) "956"
    }
    ["x-envoy-decorator-operation"]=>
    array(1) {
      [0]=>
      string(43) "grpc-proxy.default.svc.cluster.local:9200/*"
    }
  }
  ["code"]=>
  int(2)
  ["details"]=>
  string(39) "Cannot read property 'map' of undefined"
}