Spring amqp redeclare exchange and all queue

[malahov]

Hi all! I have one exchange and two queue, when I run my project and exchange (and queue) already declare, i am get exception:

... Caused by: com.rabbitmq.client.ShutdownSignalException: channel error; reason: {#method<channel.close>(reply-code=406, reply-text=PRECONDITION_FAILED - cannot redeclare exchange 'defaultExchange' in vhost '/' with different type, durable, internal or autodelete value, class-id=40, method-id=10), null, ""}...

How avoid this exception ? if I need in often redeploy me project.

my code:

        rabbitAdmin.declareExchange(exchange);
        rabbitAdmin.declareQueue(queue1);
        rabbitAdmin.declareQueue(queue2);

Sorry for my bad English

[Gary Russell]

You can't change attributes when re-declaring a queue; they have to be the same if the queue already exists.

You can use Channel.queueDeclarePassive() to check if the queue exists already.

rabbitAdmin.getRabbitTemplate().execute (new ChannelCallback() {...});