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From David Jencks <>
Subject Re: State of EJB Clustering
Date Wed, 15 Jul 2009 16:37:51 GMT
Hi Juergen,

GCache never got finished.

The wadi clustering works but is for stateful beans and AFAIK it  
provides only the state replication between cluster members and not  
the client that supports failover.  I hope Gianny will tell me if I'm  
wrong about this :-)

We do have the kind of clustering you want but I'm not sure if its  
documented.  Basically the server cluster members maintain cluster  
membership information using multicast hearbeats and the ejb client  
maintains a list of servers and can change target server based on  

There is an example of this at sandbox/failover and it used to work,  
but AFAIK no one has tried running it for several months.

This would be a great thing to turn into a sample and make more public  
and documented for 2.2.

david jencks

On Jul 15, 2009, at 8:34 AM, Juergen Weber wrote:

> Hi,
> what is the state of Geronimo's EJB clustering?
> Basically I wonder if it is possible to have n Java application  
> clients that
> address m servers that run stateless beans. A client should stick to a
> server as long it is alive and transparently go to another one if it  
> is
> dead.
> Is this information here still current for 2.2?
> clustering.html
> Or would GGache be the way to go?
> Thanks,
> Juergen
> -- 
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