r.Exists = true
			r.Error = fmt.Sprintf("max size (%d) exceeded: %d", req.MaxSize, len(data))
			select {
			case <-ctx.Done():
				return ctx.Err()
			case resp <- r:
				continue
			}
		}
		found++
		r.Exists = true
		r.Data = data
		r.Modtime = mt
		select {
		case <-ctx.Done():
			return ctx.Err()
		case resp <- r:
		}

	}

	select {
	case <-sys.configLoaded:
	default:
		xioutil.SafeClose(sys.configLoaded)
	}
	return nil
}

// Init - initializes config system by reading entries from config/iam
func (sys *IAMSys) Init(ctx context.Context, objAPI ObjectLayer, etcdClient *etcd.Client, iamRefreshInterval time.Duration) {
	bootstrapTraceMsg("IAM initialization started")

		Description:    "Other expressions are not allowed in the SELECT list when '*' is used without dot notation in the SQL expression.",
		HTTPStatusCode: http.StatusBadRequest,
	},
	ErrParseCannotMixSqbAndWildcardInSelectList: {
		Code:           "ParseCannotMixSqbAndWildcardInSelectList",
		Description:    "Cannot mix [] and * in the same expression in a SELECT list in SQL expression.",
		HTTPStatusCode: http.StatusBadRequest,
	},

		Secure:    s.secure,
		Transport: s.TestSuiteCommon.client.Transport,
	})
	if err != nil {
		c.Fatalf("Error initializing client: %v", err)
	}

	// Validate that the client from sts creds can access the bucket.
	c.mustListObjects(ctx, minioClient, bucket)

	// Create an madmin client with user creds
	userAdmClient, err := madmin.NewWithOptions(s.endpoint, &madmin.Options{

	if err != nil {
		if errors.Is(err, errFileNotFound) {
			// An in-quorum errFileNotFound means that client stream
			// prematurely closed and we do not find any xl.meta or
			// part.1's - in such a scenario we must return as if client
			// disconnected. This means that erasure.Encode() CreateFile()
			// did not do anything.

				lastUpdate = allMerged.Info.LastUpdate
			}
		}
		for {
			select {
			case <-ctx.Done():
				return
			case v := <-updateCloser:
				update()
				xioutil.SafeClose(v)
				return
			case <-updateTicker.C:
				update()
			}
		}
	}()

	wg.Wait()
	ch := make(chan struct{})
	select {
	case updateCloser <- ch:
		<-ch
	case <-ctx.Done():
		mu.Lock()

mango`,
		},
		{
			name:  "Select column simplest",
			query: `select qty from S3Object`,
			wantResult: `1
3`,
		},
		{
			name:  "Select column with table name prefix",
			query: `select S3Object.qty from S3Object`,
			wantResult: `1
3`,
		},
		{
			name:  "Select column without table alias",
			query: `select qty from S3Object s`,
			wantResult: `1
3`,
		},

			return np, grid.NewRemoteErr(err)
		}
	default:
		return np, grid.NewRemoteErr(errUnsupportedSignal)
	}
	return np, nil
}

// ListenHandler sends http trace messages back to peer rest client
func (s *peerRESTServer) ListenHandler(ctx context.Context, v *grid.URLValues, out chan<- *grid.Bytes) *grid.RemoteErr {
	values := v.Values()
	defer v.Recycle()
	var prefix string

	if err != nil {
		return err
	}

	if token != "" {
		req.Header.Set("Authorization", token)
	}
	req.Header.Set("Content-Type", "application/json")

	clnt := http.Client{Transport: getRemoteInstanceTransport()}
	resp, err := clnt.Do(req)
	if err != nil {
		return err
	}

	xhttp.DrainBody(resp.Body)
	if resp.StatusCode != http.StatusOK {
		return errors.New(resp.Status)
	}

client = mqtt.Client(client_id="myclientid",clean_session=False)

client.on_connect = on_connect
client.on_message = on_message

client.connect("localhost",1883,60)
client.loop_forever()
```

Execute this example python program to watch for MQTT events on the console.

```py
python mqtt.py
```

Open another terminal and upload a JPEG image into `images` bucket.

```
mc cp myphoto.jpg myminio/images