RPC calls and multicast messages in oc4j cluster
Hi, our application uses RPC calls, which are distributed over multicast messages (jgroups). We use RPC calls to update internal object cache, which exists on each cluster instance. The OC4J instance, which sends the message, successfully receives these and executes the RPC call. The other OC4J instance does not get the message or cannot execute the RPC call. I don't know whether reception of multicast messages is not possible and/or the RPC call is not possible (safety reasons). The same implementation does work with other app. server like Bea Weblogic 8.1.
Scrap JMS. Use plain java.net or JINI.
You could create a Peer-to-Peer Chain:
Server A -> Server B -> Server C -> Server A
On each Server have a server listening for messages (from the Server to the left in the chain) and a client that sends messages (to the Server to the right in the chain) and an application that links the server and client on each Server.
So,
Server A's "server" listens for messages from the "client" on Server C, and so on.
This is vary efficent. A simple send-receive chain that is clusterd within a small (or large) group of Servers. You could also try Bi-Directional Parallel Communications BDPC. That would basically have Server A send messages to both Servers - one to the left and one to the right, then at the same time, listen for messages from the Server on the left and the Server on the right. This is better suited for large-scale clusters where a Uni-directional communications model would take too long to propogate messages to every member of the group.
But, that's just me.
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