What Tim said and this sounds like a bad dequeue scenario where you either 
don't have enough consumer or they are way too slow, it also sounds a bit like 
using Amq as data storage.

On Wed, Nov 5, 2014 at 9:07 AM, Tim Bain <tb...@alumni.duke.edu> wrote:

> I don't know if there's a way to do this without changing the broker config
> (I doubt it, but I don't have any direct knowledge either way), but it
> seems like a simple enough change to the broker config.  Other than the
> need for a broker restart, is there a reason not to just do that?
> Alternatively, you might be able to dump all messages to a log file by
> adding a Camel route to the broker and using a wiretap within that route
> that logs out each message as it passes through.  I've never used Camel
> embedded on the broker, so I'm not sure if this route could be added
> without a broker restart...
> But more generally, do you need to browse more than 400?  Is that number of
> messages really not enough to figure out why messages are backing up, and
> yet seeing a few thousand is expected to show exactly what's going on?  And
> even if you do need a larger sample size, can't you just browse multiple
> times over a period of time and report on the aggregate numbers?
> On Tue, Nov 4, 2014 at 7:51 PM, Kevin Burton <bur...@spinn3r.com> wrote:
>> This seems like a question that is probably answered somewhere but heck if
>> I can find it.
>>
>> I want to browse a significant amount of messages in a queue.  Some of my
>> queues can have thousands and thousands of messages and I’d like to figure
>> out why they are backing up.
>>
>> So I want to write some code to compute some stats via a sample and issue a
>> report.
>>
>> Which I could do easily by just browsing the queue.
>>
>> But I’m limited to 400.  Which apparently is hard coded here in the broker.
>>
>> http://activemq.apache.org/per-destination-policies.html
>>
>> … but I’d like to be able to browse more.  On the order of 1-5k.
>>
>> So how does one tell the client to browse more than 400 messages?  Or do I
>> need to reconfigure the broker as there is no way of doing this otherwise.
>>
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