[FIXED] RabbitMQ BasicAck giving channel shutdown error messages on console - Spring AMQP

Issue

@EnableRabbit
@Service
public class RabbitMqListenerWithReply {


@Autowired
RabbitTemplate rabbitTemplate;

@Value("${test.rabbitmq.exchange}")
private String rabbitMQExchange;


@Value("${test.rabbitmq.routingkey}")
private String rabbitMQRoutingKey;

@RabbitListener(queues = "${test.rabbitmq.queue}")
public void receiveMessage(String message, Channel channel, 
@Header(AmqpHeaders.DELIVERY_TAG)long tag) throws IOException {
    System.out.println(message.toString());
    channel.basicAck(tag, false);
    System.out.println("Ackd"); 
    
}
}

I am trying to implement a listener which acknowledge the message after I consume it, however the console would return this error so can someone guide me on where I could have went wrong.

This is the error that I am getting right now whenever I run the publisher to publish the message to the exchange.

2022-01-03 09:35:33.192 ERROR 27280 --- [ 127.0.0.1:5672] o.s.a.r.c.CachingConnectionFactory       : Channel shutdown: channel error; protocol method: #method<channel.close>(reply-code=406, reply-text=PRECONDITION_FAILED - unknown delivery tag 1, class-id=60, method-id=80)

2022-01-03 09:35:34.208  INFO 27280 --- [ntContainer#0-1] o.s.a.r.l.SimpleMessageListenerContainer : Restarting Consumer@52d7ab79: tags=[[amq.ctag-0pIM_-TROTIxXRsAJpmOrw]], channel=Cached Rabbit Channel: AMQChannel(amqp://[email protected]:5672/,1), conn: Proxy@71369e1a Shared Rabbit Connection: SimpleConnection@60b616c8 [delegate=amqp://[email protected]:5672/, localPort= 57660], acknowledgeMode=AUTO local queue size=0

This is how I am publishing my message at the moment.

@RestController
@RequestMapping("api/test")
public class RestAPIController {
@Autowired
RabbitTemplate rabbitTemplate;

@Value("${test.rabbitmq.exchange}")
private String rabbitMQExchange;

@Value("${test.rabbitmq.routingkey}")
private String rabbitMQRoutingKey;

@Value("${test.rabbitmq.queue}")
private String rabbitMQQueue;



@GetMapping("{message}")
public String testAPI(@PathVariable("message") String message) {
    System.out.println("Message sent: " + message);
    rabbitTemplate.convertAndSend(rabbitMQExchange, rabbitMQRoutingKey , message);
    return "The message was sent";
}

}

Solution

@RabbitListener use AUTO-ACK by default.

The container acknowledges the message automatically, unless the MessageListener throws an exception.

So if you ack once in listener, the framework will ack once, and repeating ack causes this exception.

Try:

@RabbitListener(queues = "xxx", ackMode = "MANUAL")

Answered By - zysaaa
Answer Checked By - David Marino (JavaFixing Volunteer)