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From Gary Tully <gary.tu...@gmail.com>
Subject Re: sendFailIfNoSpace=true, no JMSException for Producer
Date Thu, 29 Oct 2009 10:44:54 GMT
last piece is to configure a pendingQueuePolicy for your queue that will
cursor messages in memory rather than spool out to a store. The default is a
store cursor which will be triggered when the memory limit is reached and
hence will reduce memory usage below your limit. with the vm cursor, the
memory will be retained.

To achieve this use the vm cursor as in the topic case:

           <policyEntry queue="NAM_QUEUE_01" producerFlowControl="false"
memoryLimit="20kb">
            <pendingQueuePolicy>
                 <vmQueueCursor/>
             </pendingQueuePolicy>
        </policyEntry>

2009/10/29 moreno9000 <moreno.mauri@italtel.it>

>
> Thank you Gary!
>
> I changed activemq.xml for my queue (NAM_QUEUE_01) in this way:
>
> <destinationPolicy>
>   <policyMap>
>      <policyEntries>
>         <policyEntry topic=">" producerFlowControl="true"
> memoryLimit="1mb">
>            <pendingSubscriberPolicy>
>               <vmCursor />
>            </pendingSubscriberPolicy>
>         </policyEntry>
>         </policyEntry>
>            <policyEntry queue="NAM_QUEUE_01" producerFlowControl="false"
> memoryLimit="20kb">
>         </policyEntry>
>       </policyEntries>
>    </policyMap>
> </destinationPolicy>
>
> and in jndi.properties file (used by the Producer) :
>
> java.naming.provider.url = tcp://
> 172.22.123.139:61616?jms.useAsyncSend=false
>
> But it doesn'w work :-(
>
> Now, no exceptions for Producer and for AMQ too.
>
> Moreno
>
>
>
> Gary Tully wrote:
> >
> > you need to turn off producer flow control so that you will be blocked by
> > the queue and also have your producer use sync send (as it defaults to
> > async
> > sending for non persistent or non transactional messages) so that you can
> > catch any exception.
> >
> >
> > 2009/10/28 moreno9000 <moreno.mauri@italtel.it>
> >
> >>
> >> Hi all,
> >> I'm using AMQ 5.3 with a Producer that sends 10.000 very small msg
> >> (1kb for msg, no persistence) to a queue.
> >> No consumers are listening to the queue.
> >>
> >> In activemq.xml this is System Usage configuration:
> >>
> >> <systemUsage>
> >>   <systemUsage sendFailIfNoSpace="true">
> >>      <memoryUsage>
> >>         <memoryUsage limit="20 kb"/>
> >>      </memoryUsage>
> >>      <storeUsage>
> >>          <storeUsage limit="1 gb" name="foo"/>
> >>      </storeUsage>
> >>      <tempUsage>
> >>           <tempUsage limit="100 mb"/>
> >>      </tempUsage>
> >>   </systemUsage>
> >> </systemUsage>
> >>
> >> AMQ throws the following exception after having received 20 msg:
> >>
> >> WARN | Async error occurred: javax.jms.ResourceAllocationException:
> Usage
> >> Manager memory limit
> >> reached. Stopping producer (ID:vlab_1_1_1-34012-1256728549176-0:0:1:1)
> to
> >> prevent flooding
> >> queue://NAM_QUEUE_01. See
> >> http://activemq.apache.org/producer-flow-control.html for more info
> >> javax.jms.ResourceAllocationException:
> >> Usage Manager memory limit reached. Stopping producer
> >> (ID:vlab_1_1_1-34012-1256728549176-0:0:1:1)
> >> to prevent flooding queue://NAM_QUEUE_01.
> >> See http://activemq.apache.org/producer-flow-control.html for more info
> >>
> >> This is ok but I also expected the Producer to receive a JMSException.
> >>
> >> It doesn't receive anything and goes on sending all 10.000 msg.
> >> After having sent all msg, AMQ console displays only 20 pending msg.
> >> A following consumer reads these 20 msg.
> >>
> >> This is the normal behaviour or Producer's sends had to fail
> >> (with an Exception) from 21th to 10000th attempt?
> >>
> >> Many thanks in advance for any reply.
> >> Moreno
> >>
> >>
> >> --
> >> View this message in context:
> >>
> http://www.nabble.com/sendFailIfNoSpace%3Dtrue%2C-no-JMSException-for-Producer-tp26094263p26094263.html
> >> Sent from the ActiveMQ - User mailing list archive at Nabble.com.
> >>
> >>
> >
> >
> > --
> > http://blog.garytully.com
> >
> > Open Source Integration
> > http://fusesource.com
> >
> >
>
> --
> View this message in context:
> http://www.nabble.com/sendFailIfNoSpace%3Dtrue%2C-no-JMSException-for-Producer-tp26094263p26110380.html
> Sent from the ActiveMQ - User mailing list archive at Nabble.com.
>
>


-- 
http://blog.garytully.com

Open Source Integration
http://fusesource.com

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