diff --git a/api/service/networkinfo/service.go b/api/service/networkinfo/service.go
index 218090292..92a48ad5f 100644
--- a/api/service/networkinfo/service.go
+++ b/api/service/networkinfo/service.go
@@ -28,6 +28,7 @@ type Service struct {
 	peerChan    chan p2p.Peer
 	peerInfo    <-chan peerstore.PeerInfo
 	discovery   *libp2pdis.RoutingDiscovery
+	lock        sync.Mutex
 }
 
 // New returns role conversion service.
@@ -116,17 +117,14 @@ func (s *Service) DoService() {
 			}
 			if peer.ID != s.Host.GetP2PHost().ID() && len(peer.ID) > 0 {
 				utils.GetLogInstance().Info("Found Peer", "peer", peer.ID, "addr", peer.Addrs, "my ID", s.Host.GetP2PHost().ID())
-				var wg sync.WaitGroup
-				wg.Add(1)
-				go func() {
-					defer wg.Done()
-					if err := s.Host.GetP2PHost().Connect(s.ctx, peer); err != nil {
-						utils.GetLogInstance().Warn("can't connect to peer node", "error", err)
-					} else {
-						utils.GetLogInstance().Info("connected to peer node", "peer", peer)
-					}
-				}()
-				wg.Wait()
+				s.lock.Lock()
+				if err := s.Host.GetP2PHost().Connect(s.ctx, peer); err != nil {
+					utils.GetLogInstance().Warn("can't connect to peer node", "error", err)
+				} else {
+					utils.GetLogInstance().Info("connected to peer node", "peer", peer)
+				}
+				s.lock.Unlock()
+				// figure out the public ip/port
 				ip := "127.0.0.1"
 				var port string
 				for _, addr := range peer.Addrs {
diff --git a/p2p/host/hostv2/hostv2.go b/p2p/host/hostv2/hostv2.go
index d0a8624a6..d37519c9e 100644
--- a/p2p/host/hostv2/hostv2.go
+++ b/p2p/host/hostv2/hostv2.go
@@ -45,6 +45,7 @@ type HostV2 struct {
 	pubsub PubSub
 	self   p2p.Peer
 	priKey p2p_crypto.PrivKey
+	lock   sync.Mutex
 
 	incomingPeers []p2p.Peer // list of incoming Peers. TODO: fixed number incoming
 	outgoingPeers []p2p.Peer // list of outgoing Peers. TODO: fixed number of outgoing
@@ -161,7 +162,8 @@ func New(self *p2p.Peer, priKey p2p_crypto.PrivKey, opts ...p2p_config.Option) *
 		append(opts, libp2p.ListenAddrs(listenAddr), libp2p.Identity(priKey))...,
 	)
 	catchError(err)
-	pubsub, err := pubsub.NewGossipSub(ctx, p2pHost)
+	//	pubsub, err := pubsub.NewGossipSub(ctx, p2pHost)
+	pubsub, err := pubsub.NewFloodSub(ctx, p2pHost)
 	catchError(err)
 
 	self.PeerID = p2pHost.ID()
@@ -244,15 +246,11 @@ func (host *HostV2) ConnectHostPeer(peer p2p.Peer) {
 		utils.GetLogInstance().Error("ConnectHostPeer", "new peerinfo error", err, "peer", peer)
 		return
 	}
-	var wg sync.WaitGroup
-	wg.Add(1)
-	go func() {
-		defer wg.Done()
-		if err := host.h.Connect(ctx, *peerInfo); err != nil {
-			utils.GetLogInstance().Warn("can't connect to peer", "error", err, "peer", peer)
-		} else {
-			utils.GetLogInstance().Info("connected to peer host", "node", *peerInfo)
-		}
-	}()
-	wg.Wait()
+	host.lock.Lock()
+	defer host.lock.Unlock()
+	if err := host.h.Connect(ctx, *peerInfo); err != nil {
+		utils.GetLogInstance().Warn("can't connect to peer", "error", err, "peer", peer)
+	} else {
+		utils.GetLogInstance().Info("connected to peer host", "node", *peerInfo)
+	}
 }
diff --git a/p2p/host/mock/host_mock.go b/p2p/host/mock/host_mock.go
index 694459f0c..1d00a3df3 100644
--- a/p2p/host/mock/host_mock.go
+++ b/p2p/host/mock/host_mock.go
@@ -5,11 +5,12 @@
 package mock_p2p
 
 import (
+	reflect "reflect"
+
 	gomock "github.com/golang/mock/gomock"
 	p2p "github.com/harmony-one/harmony/p2p"
 	go_libp2p_host "github.com/libp2p/go-libp2p-host"
 	go_libp2p_peer "github.com/libp2p/go-libp2p-peer"
-	reflect "reflect"
 )
 
 // MockHost is a mock of Host interface
@@ -141,3 +142,33 @@ func (m *MockHost) GroupReceiver(arg0 p2p.GroupID) (p2p.GroupReceiver, error) {
 func (mr *MockHostMockRecorder) GroupReceiver(arg0 interface{}) *gomock.Call {
 	return mr.mock.ctrl.RecordCallWithMethodType(mr.mock, "GroupReceiver", reflect.TypeOf((*MockHost)(nil).GroupReceiver), arg0)
 }
+
+// AddIncomingPeer mocks base method
+func (m *MockHost) AddIncomingPeer(peer p2p.Peer) {
+	m.ctrl.Call(m, "AddIncomingPeer", peer)
+}
+
+// AddIncomingPeer indicates an expected call of AddIncomingPeer
+func (mr *MockHostMockRecorder) AddIncomingPeer(groups, msg interface{}) *gomock.Call {
+	return mr.mock.ctrl.RecordCallWithMethodType(mr.mock, "AddIncomingPeer", reflect.TypeOf((*MockHost)(nil).AddIncomingPeer), groups, msg)
+}
+
+// AddOutgoingPeer mocks base method
+func (m *MockHost) AddOutgoingPeer(peer p2p.Peer) {
+	m.ctrl.Call(m, "AddOutgoingPeer", peer)
+}
+
+// AddOutgoingPeer indicates an expected call of AddOutgoingPeer
+func (mr *MockHostMockRecorder) AddOutgoingPeer(groups, msg interface{}) *gomock.Call {
+	return mr.mock.ctrl.RecordCallWithMethodType(mr.mock, "AddOutgoingPeer", reflect.TypeOf((*MockHost)(nil).AddOutgoingPeer), groups, msg)
+}
+
+// ConnectHostPeer mocks base method
+func (m *MockHost) ConnectHostPeer(peer p2p.Peer) {
+	m.ctrl.Call(m, "ConnectHostPeer", peer)
+}
+
+// ConnectHostPeer indicates an expected call of ConnectHostPeer
+func (mr *MockHostMockRecorder) ConnectHostPeer(groups, msg interface{}) *gomock.Call {
+	return mr.mock.ctrl.RecordCallWithMethodType(mr.mock, "ConnectHostPeer", reflect.TypeOf((*MockHost)(nil).ConnectHostPeer), groups, msg)
+}