Most common examples of misuse of singleton class

Question

When should you NOT use a singleton class although it might be very tempting to do so? It would be very nice if we had a list of most common instances of \'singletonitis\' t

Answer 1

When you have multiple applications running in the same JVM.

A singleton is a singleton across the entire JVM, not just a single application. Even if multiple threads or applications seems to be creating a new singleton object, they're all using the same one if they run in the same JVM.