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From Christian Posta <christian.po...@gmail.com>
Subject Re: Message sometimes lost when transaction open and broker restarted
Date Tue, 30 Oct 2012 14:55:42 GMT
So using your orignal steps to recreate the issue, can you fill in where
you do the queue browsing?

* I have a test which puts 10 messages on a queue.  This queue is being read
> via a transacted consumer.
> * I then shutdown the broker without committing or rolling back the
> session.
> I am doing this with an embedded broker, so the process does /not/ get shut
> down.
> * I then restart the broker and read the queue, again with a transacted
> consumer.
> * Sometimes (about 5% maybe) after the restart only 9 messages are on the
> queue.
> * There are no ActiveMQ or KahaDB ERRORs when this occurs
> * It seems that it is always the first message that was put on the queue
> which is missing


On Tue, Oct 30, 2012 at 7:19 AM, mserrano <martin@attivio.com> wrote:

> Thanks.  I will try to.  In part of my test I am using a QueueBrowser to
> inspect what is on the queue.  I do this to check the state at various
> points to make sure it meets expectations.  When I removed these checks
> (which weren't completely necessary), the problem when away.  So my concern
> here is that since (I believe) the QueueBrowser is used for JMX inspection,
> does this leave a possible, albeit small, chance that using JMX will
> "corrupt" the state of a queue?
>
> I also confirmed that this is happening before the shutdown (i.e., not an
> issue with reading the KahaDB store after restart) by capturing the KahaDB
> store from a failed test and replaying it.  It always has the bad set of
> messages.
>
>
>
> --
> View this message in context:
> http://activemq.2283324.n4.nabble.com/Message-sometimes-lost-when-transaction-open-and-broker-restarted-tp4658295p4658458.html
> Sent from the ActiveMQ - User mailing list archive at Nabble.com.
>



-- 
*Christian Posta*
http://www.christianposta.com/blog
twitter: @christianposta

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