Maciej Swiderski [http://community.jboss.org/people/swiderski.maciej] created 
the discussion

"Re: Does jBPM support clustering for load balancing?"

To view the discussion, visit: http://community.jboss.org/message/635574#635574

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Good point Marian, I admit that I mainly focused on jBPM runtime rather than 
task service. Please correct me if I am wrong, but wouldn't that be an issue 
only when requirement is to have task expiration?

Anyway, I think this should be done by introducing external scheduler (for 
instance quartz) that can be clustered so the problem would be partially 
avoided, of course task service code should be enhanced here as well. Currently 
I am experimenting with quartz implementation of timer service for jBPM runtime 
so I will try to take a look at task service too.

But you are probably more interested in immediate solution, right? If so, a 
kind of "quick and dirty" workaround would be to modify named query 
(UnescalatedDeadlines inside orm file) on one of the cluster members to make 
sure it will not return any tasks so only one cluster member will be hosting 
scheduled jobs.

HTH
Maciej
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