fix(server): set joinIndex when recovered

server/peer_server.go

@@ -214,6 +214,7 @@ func (s *PeerServer) FindCluster(discoverURL string, peers []string) (toStart bo
 		// TODO(yichengq): Think about the action that should be done
 		// if it cannot connect any of the previous known node.
 		log.Debugf("%s is restarting the cluster %v", name, possiblePeers)
+		s.SetJoinIndex(s.raftServer.CommitIndex())
 		toStart = true
 		return
 	}

server/standby_server.go

@@ -36,8 +36,9 @@ type standbyInfo struct {
 }
 
 type StandbyServer struct {
-	Config StandbyServerConfig
-	client *Client
+	Config     StandbyServerConfig
+	client     *Client
+	raftServer raft.Server
 
 	standbyInfo
 	joinIndex uint64
@@ -62,6 +63,10 @@ func NewStandbyServer(config StandbyServerConfig, client *Client) *StandbyServer
 	return s
 }
 
+func (s *StandbyServer) SetRaftServer(raftServer raft.Server) {
+	s.raftServer = raftServer
+}
+
 func (s *StandbyServer) Start() {
 	s.Lock()
 	defer s.Unlock()
@@ -237,7 +242,7 @@ func (s *StandbyServer) syncCluster(peerURLs []string) error {
 func (s *StandbyServer) join(peer string) error {
 	for _, url := range s.ClusterURLs() {
 		if s.Config.PeerURL == url {
-			s.joinIndex = 0
+			s.joinIndex = s.raftServer.CommitIndex()
 			return nil
 		}
 	}