[rabbitmq-discuss] How do I inspect the queue

Reddy, Rajesh (GPT EMEA) Rajesh_Reddy at ml.com
Wed May 6 09:29:08 BST 2009

Hi Tony,

It could be a connection thing as it happened only in debug, but when I
checked the connections in server it was fine. So this is a strange
behaviour. Let me see if this happens in release mode.

Also, iam declaring a queue as follows,
Passive = false
Durable = false
Exclusive = true
Autodelete = true
Nowait = true

This would create a non durable and auto delete queue. I can inspect
using rabbitmqctl list_queues, but it only gives me durable and
autodelete and not the other items related to declare queue.
Also, what is exclusive used for.

So there is no way I can find out if my queue is deleted.

I my case the client creates queue just once and then waits on a
callback for any messages on that queue. So if a queue is deleted then
the client will be just sitting there waiting for a message without
knowing that the queue no longer exists.


-----Original Message-----
From: Tony Garnock-Jones [mailto:tonyg at lshift.net] 
Sent: 05 May 2009 17:12
To: Reddy, Rajesh (GPT EMEA)
Cc: rabbitmq-discuss at lists.rabbitmq.com
Subject: Re: [rabbitmq-discuss] How do I inspect the queue

Reddy, Rajesh (GPT EMEA) wrote:
> As I was debugging some issue the queue was deleted even though the
> connection is still active and I was no longer receiving any call
> as the queue no longer exists).

Could it be that the pauses caused by the debugger in turn caused the
heartbeat mechanism to fire, terminating the connection at the

> Also, regarding the Queue inspection . I meant how do I check in my
> client if the queue exists.

You can do a passive declare; though this will cause the channel to
close if the queue does not exist. Alternatively, you may not need to
check: queue.declare is idempotent, and you can simply issue the
queue.declare again if you are in doubt.

 [][][] Tony Garnock-Jones     | Mob: +44 (0)7905 974 211
   [][] LShift Ltd             | Tel: +44 (0)20 7729 7060
 []  [] http://www.lshift.net/ | Email: tonyg at lshift.net

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