Singleton in Cluster environment

Question

What is the best strategy to refactor a Singleton object to a cluster environment?

We use Singleton to cache some custom information from Database. Its mostly

Answer 1

Replace your singleton cache with a distributed cache.

One such cache could be JBoss Infinispan but I'm sure that other distributed cache and grid technologies exist, including commercial ones which are probably more mature at this point.

For singleton objects in general, I'm not sure. I think I'd try to not have singletons in the first place.