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From Andreas Calvo Gómez <>
Subject Re: Understanding NoB
Date Mon, 11 Feb 2013 14:41:38 GMT
Missing part
On 11/02/13 15:25, Andreas Calvo Gómez wrote:
> Hello,
> In the following scenario:
> - 4 machines (A1, A2, A3 and CB1)
> - 3 of them (A1, A2 and A3) under the same broadcast domain, with an 
> embedded broker (persistent), a local consumer (durable subscriber) 
> and a local producer, with multicast enabled and static network 
> connector (SSL) to a central broker (CB1)
Multicast TTL is 1, static network connector TTL is 2.
> - the remaining one (CB1), is a standalone broker using SSL
> Question is: after a start of all machines,
> - how many and which connectors will an embedded broker see? and 
> subscribers?
> - how many and which connectors will the standalone broker see? and 
> subscribers?
> - what happens when the producer sends a message? does it gets routed
Does it gets routed through all available connectors?
> Reason is that we see two different scenarios in the embedded brokers:
> - all of them have the correct connectors (to the other 2 embedded 
> brokers and to the central broker)
> - two of them see 3 durable subscriber: one local and two multicast
> - one of them sees 3 durable subscribers: one local, one multicast and 
> one to the central broker
> What we see is that one of the embedded brokers logs "duplicate 
> message add attempt rejected", and it increases the pending queue size 
> (seems like somehow it's doing a relay of the message).
> Thanks!

Andreas Calvo Gómez
Systems Engineer
Scytl Secure Electronic Voting
Plaça Gal·la Placidia, 1-3, 1st floor · 08006 Barcelona
Phone: + 34 934 230 324
Fax:   + 34 933 251 028

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