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From Scouser ...@gmav.demon.co.uk>
Subject Re: Usage Manager Store is Full - Root Cause?
Date Tue, 24 Feb 2009 19:27:52 GMT

Gary,

Thanks for the suggestion, one more thing I didn't know.  Makes sense when
you think about it!

Unfortunately I have just checked and I'm using a maxDataFileLength of 32mb
with a store of 128mb.  I can see the four data files as I would expect.  

Oh well, I'll keep trying.

Cheers

Richard




Gary Tully wrote:
> 
> Hi Richard,
> There is a caveat with disk usage and the default store. Space in the
> store is reclaimed by deleting unreferenced data files during cleanup.
> However, if the store consists of a single data file, it will not be
> reclaimed as the single data file will always be referenced.
> Thus it is necessary to configure a maximumFileLength for the store
> that is less than half of the system usage store limit. In this way,
> at least 2 data files will be used by the store and when sufficient
> messages have been consumes such that one of the data files is no
> longer referenced, the store usage will decrease when it is reclaimed
> after cleanup.
> There is a good description of using the usage manager in this way
> along with some configuration that works at
> http://open-source-adventures.blogspot.com/2009/01/limiting-disk-store-usage-with-active.html
> (see this caveat mentioned at the end).
> 
> hope this helps,
> Gary.
> 
> 2009/2/23 Scouser <mq@gmav.demon.co.uk>:
>>
>> 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.
>>
>>
> 
> 
> 
> -- 
> http://blog.garytully.com
> 
> Open Source SOA
> http://FUSESource.com
> 
> 

-- 
View this message in context: http://www.nabble.com/Usage-Manager-Store-is-Full---Root-Cause--tp22147570p22188756.html
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