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From Dejan Bosanac <de...@nighttale.net>
Subject Re: Network of brokers: message forwarding between brokers stops
Date Fri, 26 Nov 2010 13:48:57 GMT
Hi,

you can try adding <staticallyIncludedDestination> in you client
connector which should ensure that messages on that destination is
always passed over the network.

Take a look at http://activemq.apache.org/networks-of-brokers.html to
see how to achieve this.

Cheers
--
Dejan Bosanac
-----------------
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Blog - http://www.nighttale.net



On Fri, Nov 26, 2010 at 2:04 PM, Pauli Kaila <pauli.kaila@napa.fi> wrote:
>
> Hi,
>
> We have a setup where we have a server with it's own internal broker and
> then multiple clients that also have their own internal brokers which are
> connecting to the server broker.
>
> The server is consuming messages from a queue "server.in" via a vm
> -connection to the internal broker. The client is sending messages to the
> "server.in" queue via its own vm -connection to its internal broker. The
> messages are then forwarded by the client broker to the server broker as
> expected. Until they are not.
>
> When testing with just one client (the same thing happens with multiple
> clients) I constantly end up in a situation where the client broker stops
> forwarding messages to the server broker. The queue just starts growing
> inside the client vm (as seen by using JMX) while the queue in the server vm
> stays empty. I have enabled the lowest level of logging for ActiveMQ but
> have not been able to notice any log messages related to this situation. It
> only takes couple of hundred messages to reproduce this situation. Both the
> server and the client are running on the same machine.
>
> The only thing that has made this problem disappear is removal of the client
> broker and having only one broker. But because our clients and server might
> be on different sides of a firewall, we would like to use the network of
> brokers feature with the duplex connection to be able to successfully
> communicate through a firewall.
>
> I have tried to create a test case to reproduce this situation, but for now
> I've been unable to do that. I am not sure whether this is a bug in ActiveMQ
> or if there is something funky in the way we use it. I've played around with
> different kind of configurations but nothing seems to help.
>
> Here is our configuration:
>
> Server broker configuration:
>    <broker xmlns="http://activemq.apache.org/schema/core"
> brokerName="Server" useJmx="true" persistent="true">
>      <managementContext>
>        <managementContext createConnector="false"/>
>      </managementContext>
>      <transportConnectors>
>        <transportConnector uri="tcp://0.0.0.0:27182" />
>      </transportConnectors>
>    </broker>
>
> Client broker configuration:
>    <broker xmlns="http://activemq.apache.org/schema/core"
> brokerName="Client" useJmx="true" persistent="true">
>      <managementContext>
>        <managementContext createConnector="false"/>
>      </managementContext>
>      <networkConnectors>
>        <networkConnector uri="static:(tcp://${server_address}:27182)"
> duplex="true" conduitSubscriptions="true"/>
>      </networkConnectors>
>    </broker>
>
> We have one queue for the server and one uniquely named queue per each
> client. The server also broadcasts changes to data using a topic. In
> addition to these we are using QueueRequestors, which internally uses
> temporary queues, to do synchronous requests from the clients to the server.
> The client also uses message selectors in its queue to direct messages to
> different listeners.
>
> I hope someone reading this list could point me to a solution for our
> problem.
>
> Best regards,
> -Pauli Kaila
>
>
> --
> View this message in context: http://activemq.2283324.n4.nabble.com/Network-of-brokers-message-forwarding-between-brokers-stops-tp3060260p3060260.html
> Sent from the ActiveMQ - User mailing list archive at Nabble.com.
>

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