[lmm]

Oh yuck. I didn't know that. I've long found Hazelcast a pain to work with.

Having seen in a sibling comment that you're talking about very small files, I'd recommend Zookeeper - it's mature and has pretty low admin overhead, IME.

[mikojava]

that's very interesting. I've heard the exact opposite, hazelcast is easy to work with and Zookeeper more complicated.