What's the point of c.n.h.c.RequestCollapserFactory.defaultNameCache

[mebigfatguy]

Doesn't seem to be used, but has a relatively obtuse comment attached.

[mattrjacobs]

If you look in a few other places in the codebase, AbstractCommand, HystrixCollapser, HystrixObservableCollapser, this pattern is used to safely turned a j.u.Class into a String once per-class, rather than on every command/collapser invocation.

So the pattern is valid, but I agree with you that the data structure you pointed out is unused. Do you want to submit a PR with its removal, or shall I? Thanks for all the cleanup efforts!