Mike, most of our work lately has been in either asynchronous island  

models or (more commonly) in the master/slave evaluator, where we've  

put most of our effort.  I'd be glad to look into it but I need a  

minimal example that we can run here and test.



I will mention that if one of the nodes is stuck for some reason --  

some large individual is taking forever to be processed, for example,  

a synchronized island model will sit there waiting for it.



Sean



On Jun 9, 2006, at 12:28 PM, Michael Solano wrote:



> Hello Everyone,

>

> I'm having a bit of trouble using the IslandExchanger to perform  

> synchronous Island Model experiments in ECJ version 15. It seems to  

> work for a while but at some point one of the nodes will output  

> "Waiting for synchronization...." and everything seems to stall  

> (ecj is still running but none of the nodes are doing anything).

>

> The current setup I'm using is 3 islands (on 3 separate computers)  

> with subpop sizes of 333 individuals each with migration of 10  

> individuals every 5 generations. Does anyone know what might be  

> causing this? Is there something I may be doing incorrectly? Thanks :)

>

> -Mike