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From Gnanaprakash <>
Subject Re: active mq (message expiration)
Date Mon, 17 Dec 2007 20:22:46 GMT


I am also facing a similar issue.

The messages are not expiring as expected and they are consumed again by the
if we bring them down and restart again.

We are setting the expiration TTL on client side and setting the message
expiration age too.

Also in the durable subscriber we are doing an ack and commiting the message
and subscriber.

Still the  message does not expire and when we restart the consumers, they
are redelivered again.

Has this been fixed or is there any other configuration we need to do.


Suchitha Koneru (sukoneru) wrote:
> Hello Active MQ users/developers , 
>                               Our application uses  non persistent
> embedded broker ,durable subscribers , topic publishers . The active mq
> version is 4.1.1(release version).  There are two topic publishers and
> two durable subscribers respectively.
> In your previous responses, you specified that for durable subscribers
> active mq maintains  a queue of messages (Message Queue). For each of
> the durable subscribers, a queue of references  is maintained , the
> references point to the messages stored in  Message Queue. 
> Are these queues maintained in RAM or on the disk ?
> There is TTL of  5 minutes on all the messages.
> What is the behavior if the messages are not consumed  after 5 minutes
> ? There is JIRA issue  AMQ-1112 (Messages still exist after TTL).   Will
> the messages keep accumulating in the message queue and the
> corresponding references  in the individual queues  ?
> if this is the case will active mq occupy a lot of disk space.?
> The active mq data folder is always around (40.7-40.8 MB). 
> This issue is fixed in  5.0 snap shot, cannot upgrade to snap shot
> version, as Iam not sure how stable it is. We are going into production
> next month.
> Please  let me know, as to what can be done in this regard. Would
> switching to non durable subscribers solve the problem ?
> is there a tool which I can use for  browsing through active mq's
> Message Queues ?
> thanks,
> Suchitha.

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