I also ran across this issue with the latest 5.1.
Messages bounce back and forth between the 2 brokers via the duplex
transport until the ttl count expires. The DemandForwardingBridge doesn't
check where the message came from before sending it back off to the remote.
Working on a patch for the corresponding JIRA.
https://issues.apache.org/activemq/browse/AMQ-1661
Joe
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MikeF73 wrote:
>
> I have two brokers (call them A and B), where A establishes a connection
> to B with the options:
> duplex="true" networkTTL="3" dynamicOnly="true"
>
> I have two clients connecting to broker A, and one to B. One of the
> clients on A is subscribing to a queue, the other is publishing to it.
> The client on B is not using that queue at all. When the publishing
> client sends a message, the subscriber receives it as expected. But if I
> watch the network with a sniffer, I can see the message being sent to
> broker B and back again.
>
> I also set up a topic that all of the clients subscribe to. If a client
> on A sends a message to the topic, the client on B receives it normally,
> but the two clients on A receive the message twice. I can see with the
> sniffer that the message is being sent from A to B and back.
>
> If I change the connection so that it's not duplex (i.e. I set up matching
> simplex connections on both brokers) all of this unexpected behavior goes
> away. In the first example, the messages are no longer forwarded to B
> since there are no subscribers on that broker. In the second example, the
> message is received once by every subscriber.
>
> Did I misconfigure my duplex connection somehow? I can run it with the
> two simplex connections for now since I'm in a test environment, but I'm
> going to need to move to duplex for production.
>
> Thanks!
>
> EDIT: this is the 5.1 4/8/08 snapshot
>
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