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From Brian Wright <>
Subject Re: Question about activemq queue message events
Date Fri, 10 Feb 2012 21:50:45 GMT
Hi Matt,

Thanks for the information.  I will pass this response onto the 
developer to look into testing (and moving to) 5.5.x in our 
environment.  I will also forward your FuseSource build suggestions onto 
our developer.

As for the back-end datastore, we are using MySQL for the AMQ and 
probably also the transactions.  I can confirm this if there's any 
issues involving the use of MySQL.


On 2/7/12 9:31 AM, Matt Pavlovich wrote:
> Hi Brian-
> This list is fine, as it sounds like an ActiveMQ-related issue.  There 
> are some known issues with AMQ 5.4.2 that could lead to that problem.  
> Also, client-side issues such as exhausting connection pools, or 
> leaking connections could cause "stuck message" behavior.
> I suggest doing some testing against new 5.5.x ActiveMQ releases.  
> Specifically, I suggest using the FuseSource builds, since they are 
> more frequent than the Apache releases at this time.   They are free 
> to use.
> Are you using KahaDB as a back-end data store for AMQ?  Transactions?
> Hope this helps,
> Matt Pavlovich
> On 2/6/12 9:40 PM, Brian Wright wrote:
>> Hello,
>> I'm actually asking this question on behalf of one of our 
>> developers.  As I understand ActiveMQ (and Servicemix), when a 
>> message is placed into a queue, an event is fired off telling the 
>> consumer a new message is now present.  It is then the consumer's job 
>> to pick up the new message and process it.
>> We had a recent issue where it appeared that new message arrival 
>> events were either not firing or firing off very slowly to the 
>> consumer as messages were placed into the queue.  So, the message 
>> queue was backing up and messages were not being processed.  Note 
>> that we have about 8 different queues on this Servicemix server, but 
>> only one of the queues exhibited this behavior.  As a result, the 
>> processing ground to a halt on this specific queue and queue messages 
>> backed up.  Once we restarted everything involving servicemix, 
>> activemx and the consumer of the queue, everything went back to 
>> normal processing speed.
>> I'm trying to determine if there are any known issues that could 
>> cause this behavior within ActiveMQ.  We are running Apache 
>> Servicemix version 4.3.1-fuse-01-09 using ActiveMQ version 5.4.2 
>> (looks like the ActiveMQ packages were included with the Servicemix 
>> package).
>> As another question, since it appears ActiveMQ was included in the 
>> Servicemix package, should I ask this question on the Servicemix 
>> forum instead?
>> Any help would be appreciated.
>> Thanks.
>> -- 
>> *Brian Wright*
>> *Sr. UNIX Systems Administrator*
>> 901 Mariners Island Blvd Suite 200
>> San Mateo, CA 94404 USA
>> *Email * <>
>> *Phone *+1.650.539.3530**
>> ***** <>*
>> 	Marketo Logo


*Brian Wright*
*Sr. UNIX Systems Administrator*
901 Mariners Island Blvd Suite 200
San Mateo, CA 94404 USA
*Email * <>
*Phone *+1.650.539.3530**
***** <>*

	Marketo Logo

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