raft: document why reuse candidate's term for vote response in stepCa…

…ndidate "stepCandidate" should reuse candidate's own term, not term in Message, because pre-vote is requested with future term. Signed-off-by: Gyuho Lee <[email protected]>
etcd-io · Feb 22, 2018 · 01db389 · 01db389
1 parent 38846c2
commit 01db389
Showing 1 changed file with 2 additions and 0 deletions.
diff --git a/raft/raft.go b/raft/raft.go
@@ -1148,6 +1148,8 @@ func stepCandidate(r *raft, m pb.Message) error {
 				r.bcastAppend()
 			}
 		case len(r.votes) - gr:
+			// pb.MsgPreVoteResp contains future term of pre-candidate
+			// m.Term > r.Term; reuse r.Term
 			r.becomeFollower(r.Term, None)
 		}
 	case pb.MsgTimeoutNow: