How do I troubleshoot a QueueHasDiffField error reported on an ApsaraMQ for RabbitMQ client? - ApsaraMQ for RabbitMQ

This topic describes the cause and troubleshooting method of a QueueHasDiffField error that is reported on an ApsaraMQ for RabbitMQ client.

Symptoms

When I attempt to access an ApsaraMQ for RabbitMQ broker from an ApsaraMQ for RabbitMQ client, a QueueHasDiffField error, such as QueueHasDiffField[OAutoDelete=false&NAutoDelete=true;], is reported.

Note

In the error information, the parameter that starts with O indicates an attribute value of the queue to use, and the parameter that starts with N indicates an attribute value of the declared queue.

Causes

An attribute value of the queue to use is inconsistent with that of the declared queue. The following table describes the attribute parameters that may be inconsistent.

Parameter	Data type	Description
queue	String	The name of the queue.
durable	Boolean	Specifies whether the queue is durable: true: The queue is automatically restored if the ApsaraMQ for RabbitMQ client is reconnected to the ApsaraMQ for RabbitMQ broker. false: The queue is not automatically restored if the ApsaraMQ for RabbitMQ client is reconnected to the ApsaraMQ for RabbitMQ broker. Note By default, a queue is persistent, regardless of whether it is created by calling the CreateQueue API operation or performing operations on the Queues page of the ApsaraMQ for RabbitMQ console.
exclusive	Boolean	Specifies whether the queue is exclusive: true: The queue can be used only by its declaring connection, and is automatically deleted when the connection is closed. The declaring connection of a queue refers to the connection for which the queue is declared the earliest. false: The queue can be used by all connections, and is not automatically deleted when its declaring connection is closed.
autoDelete	Boolean	Specifies whether the queue can be automatically deleted: true: The queue is automatically deleted after the last subscription from consumers is canceled. false: The queue is not automatically deleted after the last subscription from consumers is canceled.
arguments	Map	Other parameters of the queue, including the dead-letter exchange, dead-letter routing key, and message TTL.

For example, if the value of autoDelete for the queue to use is inconsistent with that of the declared queue, QueueHasDiffField[OAutoDelete=false&NAutoDelete=true;] is reported.

The value of autoDelete for the queue to use is false.
Note
You can call the ListQueues API operation or perform operations on the Queues page of the ApsaraMQ for RabbitMQ console to obtain the values of the attribute parameters for the queue.
The value of autoDelete for the declared queue is true.
Sample code:
```
channel.queueDeclare("test", false, false, true, null);
```

Solutions

Change the inconsistent value in the declaration code to ensure that it is consistent with that of the queue to use. In this example, change the value of autoDelete to false.

Sample code:

channel.queueDeclare("test", false, false, false, null);