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From Kamlesh <>
Subject Re: acknowledged durable topic messages are sitting in ACTIVEMQ_MSGS table
Date Fri, 04 May 2007 17:13:55 GMT

Thanks James.

I noticed that in my server messages are not getting purged,  what is the
frequency of background purge process? 

I have two durable subscribers. In ACTIVEMQ_ACKS table, I see last
acknowledged message id in case of one subscriber where as in case of second
subscriber it is 0. This indicates that jms server is not acknowledging
message consumed by second subscriber. Whereas, I see in my mule based
application, which has auto acknowledge mode, is being consumed.  Could you
please help me in resolving the situation?


James.Strachan wrote:
> On 4/25/07, Kamlesh <> wrote:
>> Hi, All
>> I am using ActiveMQ 4.1.0 version and I have noticed that acknowledged
>> durable topic messages are sitting in ACTIVEMQ_MSGS table. Kindly help me
>> understant why they are sitting and when they will get purged.
> with durable topics, those messages are shared by possibly many
> consumers, so messages are not eagerly removed like they are with
> queues. So there is a background purge which removes messages which
> have been ack'd by all topic subscribers.
> -- 
> James
> -------

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