[jboss-dev-forums] [Design of Clustering on JBoss (Clusters/JBoss)] - Re: JBoss and NLB

[diabelos]

I am doing the same thing. I am using the the MS NLB to handle the load balancing while JBOSS is doing its own cluster. What I have found is, there seems to be a conflict between the two applications (NLB & JBOSS). As of yet, I don't know why this is, however, it has to do with multicasting. Basically when  you create an NLB cluster, JBOSS clustering stops working. NLB can run in either unicast or multicast mode, but, AFAIK, typical installs are multicast mode, though MS sets the default to unicast (we run in multicast because we have too). If you delete the NLB cluster, JBOSS clustering starts to work again. 

I also used the JGroups 2.5.0 testing tools to demonstrate this. 

If someone has a clue as to why this is happening, please let us know.

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