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From "Bryan.Shaw" <>
Subject Re: Help needed. About message loss in distributed queue in network of brokers environment
Date Thu, 10 Jul 2008 09:13:44 GMT

I discovered that the message transfer between network of brokers  is handled
by DemandForwardingBridgeSupport class and there is some comment on async
send mode will be assumed between brokers if the producer send the message
to the queue using async send mode which will cause small probability of
message loss.

I am now testing the sync send mode on the producer side, hope this can
resolve my problem.

Bryan.Shaw wrote:
> We have a distributed architecture with two brokers connnected to each
> other through WAN. 
> We configured it using network of brokers.
> One producer sends messages to a distributed queue named "aqueue" on
> broker A.
> One consumer consume messages from the queue "aqueue" on broker B.
> I thought activemq is responsible for the reliability of the message
> transfer. 
> Which means the when message are sent to aqueue at broker A, the messages
> are first store on broker A's persistent store and then forwarded to
> broker B's persistent store and afterwards consumed by the consumer on
> broker B. If network between these two brokers are not stable, it is
> activemq's job to ensure the message is delivered and delivered only once.
> But in real production environment, we found message loss when network
> between the two brokers is down. 
> I need proffesional help to address this issue. Is this a bug of activemq
> or a configuration issue?
> Can anybody give me some advice to avoid this kind of message loss?

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