Distributed architecture using JAVA RMI

Hi!
I want to implement a distributed architecture, in which clients invoke any of several servers, depending on their availability. The clients are not browsers, so web-server (e.g. Tomcat) clustering is not relevant here. It's a cluster of servers, each capable of providing the same functionality, but clients should be able to "find" the less loaded one and invoke it. Now, with EJB's I believe this is provided out-of-the-box, but what about using RMI? How do two processes find each other via RMI, and is it possible to put a load-balancer in the middle?
Is it possible to setup a load-balancer IP as RMI host endpoint?
Thanks a lot
A.

They find one another using the rmiregistry tool from the JDK bin, which servers register with and clients use as a lookup. AFAIK this doesn't provide provision for anything resembling load balancing. Java RMI is a fairly basic facility.
You should probably take a look at a framework like osgi.

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Any help would be greatly appreciated.
Thanks in advance
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I think this is a bug. When you exported the Registry from your server JVM it was also exported with java.rmi.server.ignoreStubClasses=true, but the Registry bootstrap at the client requires the 1.1 stub protocol for compatiblity reasons so you got this error. I would report this on the Bug Parade.
You could get around it by setting java.rmi.server.ignoreStubClasses after exporting the Registry.
BTW java.rmi.server.ignoreStubClasses isn't supposed to do anything at the client whether true or false so you can cut your testing space in half.

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; nested exception is:
java.rmi.UnmarshalException: error unmarshalling return; nested exception is:
java.io.InvalidClassException: com.hyperion.reporting.graphics.GridObject; local class incompatible: stream classdesc serialVersionUID = -1288366423950156093, local class serialVersionUID = -5245705824007679661
Can someone explains to me what can i do you to resolve this error?
During my experiences, it gives me this error only when a report have a grid or when i try to create one.

I have seen this before where there was a mismatch of versions of FR between server and client, what version/patch are you running?
Cheers
John
http://john-goodwin.blogspot.com/

Distributed architecture using JAVA RMI

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