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From Rob Davies <rajdav...@gmail.com>
Subject Re: Network of Brokers configuration limitation?
Date Tue, 17 Jul 2007 05:26:47 GMT
AFAIK there will not be duplicates (even rare ones!)  - in 4.1 and  
especially 5.0

cheers,

Rob
On Jul 16, 2007, at 11:59 PM, ksu wrote:

>
> There is a message posted in the user forum back in early 2006  
> regarding the
> limitation on the configuration of a network of brokers
> (http://www.nabble.com/Network-of-Brokers-...- 
> tf1117526s2354.html#a2921710).
> The post suggests any topology involving cyclic graph may result in
> duplicate messages been delivered.  Does this limitation still  
> exist in 4.1x
> / 5.0x?
>
> I am working with the latest 5.0 snapshot and I can't get duplicate  
> message
> to occur in a star configuration where every node is statically  
> connected to
> every other node in a 4 node broker network with ports 62001,  
> 62002, 62003,
> and 62004:
>
>                   62002
>                    / | \
>                 /    |    \
>       62001 ----+----62003
>                  \   |    /
>                    \ | /
>                   62004
>
> e.g. Network connector def for 62003:
>   <networkConnector
> uri="static:(tcp://localhost:62001,tcp://localhost:62002,tcp:// 
> localhost:62004)"/>
>
> If anyone know if this configuration may cause (rare?) problem with  
> message
> duplication in 4.1x / 5.0x, please let me know.
>
>
> P.S.:  One problem I noted, as described in a separate post to this  
> forum
> earlier, is if any of the 4 nodes dies, it may cause
> javax.jms.InvalidClientIDException exception in the reminding nodes  
> when it
> try to come back online.  The way to reliably stabilize the system  
> whenever
> this happens is to terminate and restart all nodes in the broker  
> network.
> -- 
> View this message in context: http://www.nabble.com/Network-of- 
> Brokers-configuration-limitation--tf4093369s2354.html#a11639335
> Sent from the ActiveMQ - User mailing list archive at Nabble.com.
>


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