broadcast packet flooding the network

[ywtsang]

we are using jboss-4.2.0.GA , internal gigabit network

usually we have deployed 3 jboss, all in a cluster, and it works perfectly

and recently, we have deployed more jboss, but in a different cluster (i.e. using a different cluster name), and find that the broadcast packets in the network happen to flood the network seriously

e.g.
before: each machine have 1.X broadcast packet per second
after: occasionally each machine have several thousand packets per second

i am still checking the real cause, but want to confirm if jboss will contribute "broadcast" packets? as i just assume that it just multicast packets

also, can anyone share that how many jboss can be deployed in a cluster in production environment without problem?

[ywtsang]

more information

we only use the jboss for clustered stateless session bean (ejb3)

[brian.stansberry]

I'm not aware of any JBoss code that uses broadcast. Certainly not in the clustering libraries, which only use multicast or unicast.

Suggest you use a tool like wireshark to track down what these packets are.