Configuration

2 linux machines clustered w/ jboss 3.2.5 
1 cisco 11000 load balancer

Issue

We are having a problem with a 2 node cluster replicating session information. 
Everything works well until we shut down one of the cluster nodes to do work (upgrade 
etc) on it. Apparently when 1 node is shut down the other node becomes all but 
unresponsive for a minute or two (seems longer for users). I assume this is due to the 
"up" node attempting to verify that the "down" node is gone so it can continue to 
process requests. My questions are: 

1. What is the best way to minimize this unreponsive window? Is there an attribute in 
cluster-service.xml that would minimize this "downtime"? 
2. Is there a possibility that if we attempt to minimize this window that the sessions 
could become out-of-sync and cause worse problems than unresponsiveness?

Thanks in advance.


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