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From Matt Pavlovich <mattr...@gmail.com>
Subject Re: Question about activemq queue message events
Date Fri, 10 Feb 2012 22:10:33 GMT
No problem, let us know how it goes.

Thanks!
Matt Pavlovich

On 2/10/12 3:50 PM, Brian Wright wrote:
> 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.
>
> Thanks.
>
> 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 *brianw@marketo.com <mailto:brianw@marketo.com>
>>> *Phone *+1.650.539.3530**
>>> *****www.marketo.com <http://www.marketo.com/>*
>>>
>>> 	Marketo Logo
>>>
>>>
>
> -- 
>
> *Brian Wright*
> *Sr. UNIX Systems Administrator*
> 901 Mariners Island Blvd Suite 200
> San Mateo, CA 94404 USA
> *Email *brianw@marketo.com <mailto:brianw@marketo.com>
> *Phone *+1.650.539.3530**
> *****www.marketo.com <http://www.marketo.com/>*
>
> 	Marketo Logo
>
>

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