From 01db389ea8f8cd78ee84273b2f54feefe136a214 Mon Sep 17 00:00:00 2001
From: Gyuho Lee <gyuhox@gmail.com>
Date: Wed, 21 Feb 2018 16:00:43 -0800
Subject: [PATCH] raft: document why reuse candidate's term for vote response
 in stepCandidate

"stepCandidate" should reuse candidate's own term, not term in Message,
because pre-vote is requested with future term.

Signed-off-by: Gyuho Lee <gyuhox@gmail.com>
---
 raft/raft.go | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/raft/raft.go b/raft/raft.go
index 235a38b51f0..ef9b86597e5 100644
--- 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: