Commit Graph

4 Commits

Author SHA1 Message Date
Konstantin Osipov
e49d5f89a5 raft: do not account for the same vote twice
While a duplicate vote from the same server is not possible by a
conforming Raft implementation, Raft assumptions on network permit
duplicates.
So, in theory, it is possible that a vote message is delivered
multiple times.

The current voting implementation does reject votes from non-members,
but doesn't check for duplicate votes.

Keep track of who has voted yet, and reject duplicate votes.

A unit test follows.
2021-02-18 16:04:44 +03:00
Konstantin Osipov
7ea064ac04 raft: remove fsm::set_configuration()
Set either tracker or votes configuration explicitly.
This saves a few lines and simplifies unit tests.
2021-02-18 16:04:44 +03:00
Konstantin Osipov
c4552ffb9a raft: add ostream serialization for enum vote_result 2021-02-18 16:04:44 +03:00
Konstantin Osipov
04b4d97d6a raft: rename progress.hh to tracker.hh
class tracker is the main class of this module.
2021-02-18 16:04:43 +03:00