My cluster of 5 JBoss 3.2.6 machines on Red Hat Linux has issues with members 
dropping in and out of the cluster under heavy load. I am looking for the most 
reliable method to keep my cluster in a steady state. Does anybody know what 
the cost/benefits are for switching from FD to FD_SOCK in the JGroups 
configuration? I am looking for examples for when each would be appropriate to 
use.

Also, I notice that only one of the members in the cluster starts rapidly 
degrading under heavy load (with an exceptionally high load average), and once 
that instance is bounced, another instance starts to degrade, like a virus. But 
the traffic is being evenly distributed to all boxes. Does anybody have any 
ideas as to the cause of this? My gut is that it has to do with the cluster 
coordinator being overloaded with work. Is there a good resource out there to 
find out what the cluster coordinator does and how to optimize it?

Thanks.

-Rob

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