- Yes, if you store primitive types rather than application types this problem 
won't occur
- This problem won't occur with remote marshalling of the class data, since 
object is sent in serialized form to remote nodes. This does point out another 
problem you are going to run into, however, which is harder to deal with than 
the one you've hit already ... to get sending your application classes to 
remote nodes to work, you need to set the class loader that the cache uses to 
demarshal objects read from the wire; this isn't too hard to do - use 
cache.registerClassLoader() - but you can't *change* the class loader for a 
running cache. So you basically need to either use primitive types or restart 
the cache for that node (not just clear it) when you redeploy your application.
- Are you really planning to change the code on one node of the cluster while 
leaving an older version running on another node? Brave. 

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