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From "James Strachan" <james.strac...@gmail.com>
Subject Re: Connection lost in JMS to JMS Bridge scenario.
Date Fri, 25 Aug 2006 09:25:36 GMT
On 8/25/06, Manuel Teira <mteira@tid.es> wrote:
> James Strachan escribió:
> > So a few things going on here.
> >
> > * on a restart not all queues appear in JMX until they are actually
> > used. This page describes why along with explaining how to work around
> > this
> > http://incubator.apache.org/activemq/how-do-i-create-new-destinations.html
> >
> Anyway, it seems that if there are messages in the database for the
> SUNRECV queue, it is created by ActiveMQ on restart. With the cases:
> 1.-The messages are sent to the bridged broker.
> 2.-The messages are not sent to the bridged broker, and on a new message
> arriving, older are dropped.
>
> I find (2) to be a problem.

I don't understand what (2) means. Could you try explain that again please?



> > * the database is not always in sync with the broker as we use a high
> > performance journal; so the database is checkpointed periodically and
> > is usually a bit behind the broker. You can avoid this by disabling
> > the high performance journal (but its pretty slow to do that). Here's
> > an example config if you want
> > http://incubator.apache.org/activemq/jdbc-master-slave.html
>
> Well, I've found the reason for this. It's because messages sent with
> the JMX sendTextMessage operation are not persistent, and that's the
> reason they're not inserted in the database (I think).

I don't follow. Persistence is defined not by the type of the message
but by the deliveryMode of the MessageProducer


> > BTW I looked at the code for the JMS bridge and if a connection is
> > lost with the remote broker, the bridge just stops - so no messages
> > should be lost. Though it will require a bounce of the broker to
> > reconnect.
> I'm going to open a JIRA for this.

Great

-- 

James
-------
http://radio.weblogs.com/0112098/

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