seeing lots of DuplicateVotes and elections with no outcome about raft HOT 3 CLOSED

Dug into this a little more, the randomization for the election timeout (and other timeouts) is via math/rand, which uses a deterministic seed (each run of the process will see the same sequence of random values), so the timeout is randomized, but the randomized values are moving in lock step in each node.

Seems like this should create a new source that's seeded by something derived from the node, like the listen address to make each nodes randomization different. [If that seems reasonable, i'd be happy to code it up and submit a PR]

from raft.

@superfell We should maybe just pull in some real entropy (crypto/rand) and seed math/rand as a simpler approach.

from raft.

That'll work too, i didn't know if anything was relying on it being deterministic (perhaps tests)

from raft.