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From Scouser ...@gmav.demon.co.uk>
Subject Re: Usage Manager Store is Full - Root Cause?
Date Mon, 23 Feb 2009 22:55:14 GMT

Hiya

Thanks for that - clarified the issue nicely, but I have now found something
odd which may be related.

If I use flow control with fairly small values for memoryLimit e.g.

<policyEntry queue="xyz.Queue" useCache="true" producerFlowControl="true" 
memoryLimit="3mb">

Then if I generate a lot of messages I eventually get an exception as I
would expect:

javax.jms.ResourceAllocationException: SystemUsage memory limit reached

At this point, producers can only write to the queue as space is freed up by
by consumers so this works as I would expect.  However, if I use a larger
memoryLimit value and get an exception when I run out of storage:

javax.jms.ResourceAllocationException: Usage Manager Store is Full

then the producers seem to hang even if the pending messages are consumed. 
That is, they always generate a 'Usage Manager Store is Full' exception even
if all the message have been consumed.  I have also noticed that the 'Store
percent used' value in the Admin application never drops once it has got to
100%

Any thoughts?

Cheers

Richard





Dejan Bosanac wrote:
> 
> Hi,
> 
> you have set "store usage" in your activemq.xml and set it to fail if
> there
> is no more space. I just put up a section describing this behavior
> 
> http://cwiki.apache.org/confluence/display/ACTIVEMQ/Producer+Flow+Control#ProducerFlowControl-Systemusage
> 
> Cheers
> --
> Dejan Bosanac
> 
> Open Source Integration - http://fusesource.com/
> ActiveMQ in Action - http://www.manning.com/snyder/
> Blog - http://www.nighttale.net
> 
> 
> On Sun, Feb 22, 2009 at 3:52 PM, Scouser <mq@gmav.demon.co.uk> wrote:
> 
>>
>> I'm fairly new to activeMQ and have become stuck on an error.  I don't
>> seem
>> to be able to find much out about the root cause.  I have a small example
>> which send messages to a couple of queues and reads the messages out. 
>> I'm
>> using Spring's JMS template etc to do most of the hard work.  Eventually
>> I
>> get the following crash:
>> ...
>> SEVERE: Usage Manager Store is Full; nested exception is
>> javax.jms.ResourceAllocationException: Usage Manager Store is Full
>> org.springframework.jms.ResourceAllocationException: Usage Manager Store
>> is
>> Full; nested exception is javax.jms.ResourceAllocationException: Usage
>> Manager Store is Full
>>        at
>>
>> org.springframework.jms.support.JmsUtils.convertJmsAccessException(JmsUtils.java:298)
>>        at
>>
>> org.springframework.jms.support.JmsAccessor.convertJmsAccessException(JmsAccessor.java:168)
>>        at
>> org.springframework.jms.core.JmsTemplate.execute(JmsTemplate.java:474)
>>
>> ...
>> Caused by: javax.jms.ResourceAllocationException: Usage Manager Store is
>> Full
>>        at
>> org.apache.activemq.broker.region.Queue.doMessageSend(Queue.java:430)
>>        at org.apache.activemq.broker.region.Queue.send(Queue.java:417)
>>        at
>>
>> org.apache.activemq.broker.region.AbstractRegion.send(AbstractRegion.java:354)
>> ...
>>
>> So, what is the 'Usage Manager' ?, any ideas what I may have done wrong?,
>> any and all help appreciated!
>>
>>
>> --
>> View this message in context:
>> http://www.nabble.com/Usage-Manager-Store-is-Full---Root-Cause--tp22147570p22147570.html
>> Sent from the ActiveMQ - User mailing list archive at Nabble.com.
>>
>>
> 
> 
> -----
> Dejan Bosanac
> 
> Open Source Integration - http://fusesource.com/
> ActiveMQ in Action - http://www.manning.com/snyder/
> Blog - http://www.nighttale.net
> 

-- 
View this message in context: http://www.nabble.com/Usage-Manager-Store-is-Full---Root-Cause--tp22147570p22172029.html
Sent from the ActiveMQ - User mailing list archive at Nabble.com.


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