Memory limit reached

[Orn <or...@yahoo.com>]

I'm getting the following warning in the ActiveMq log when processing JMS
messages

>> Usage Manager Memory Limit (720332390) reached on queue:feed, size 0.
>> Producers will be throttled to the rate at which messages are removed
>> from this destination to prevent flooding it.

As you can see the size of the queue is 0, a lot has been enqueued and
dequeued ( the same amount), I'm using persistent messages. I was under the
impression that once you dequeue the message that the broker discards it and
won't have to hold any memory for it ?

After this happens my queue stops moving along.





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Re: Memory limit reached

[artnaseef <ar...@artnaseef.com>]

Thanks for letting us know - glad you were able to track it down.



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Re: Memory limit reached

[Orn <or...@yahoo.com>]

I found it, it was a configuration issue.

The same listener container was defined twice.

cheers !



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Re: Memory limit reached

[Orn <or...@yahoo.com>]

Have to admit I'm pretty new to this and inherited the project that we have.


This is how my jms template is setup, looks like I don't use transactions
and auto ack, since that's the default.

    <bean id="jmsTemplate" class="org.springframework.jms.core.JmsTemplate">
        <property name="connectionFactory" ref="connectionFactory"/>
	    <property name="sessionTransacted" value="false"/>  
    	<property name="receiveTimeout" value="5000"/> 
    </bean>


The consumers use this interface MessageListener and override onMessage. 
Using this code to send to the next Queue, I have 4 Queues.

        	final Article msgArticle = article;
	        jmsTemplate.send(this.destination, new MessageCreator() {
	            @Override
	            public Message createMessage(Session session) throws
JMSException {
	                logger.info("finish saving article, send out article for
next step");
	                ObjectMessage msg = session.createObjectMessage();
	                msg.setObject(msgArticle);
	                return msg;
	            }
	        });


Does that sound like a reasonable approach ?    
Any other information you would want me to provide ?

Thanks, 





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Re: Memory limit reached

[Orn <or...@yahoo.com>]

I will look to see if transactions are in use.  In the ActiveMq dashboard the
column -Number Of Pending Messages- is zero.



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Re: Memory limit reached

[artnaseef <ar...@artnaseef.com>]

Are transactions in use?  Perhaps this is the result of an open transaction.

I would need to look more closely at the code to see under what conditions
this can happen, and exactly what that queue size 0 means.

Another thought - look at the inflight count for the queue and make sure
that's zero as well.



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