diff --git a/core/resharding.go b/core/resharding.go
index 248542627..723aee79a 100644
--- a/core/resharding.go
+++ b/core/resharding.go
@@ -58,7 +58,11 @@ func (ss *ShardingState) assignNewNodes(newNodeList []types.NodeID) {
 		if numActiveShards > 0 {
 			id = i % numActiveShards
 		}
-		ss.shardState[id].NodeList = append(ss.shardState[id].NodeList, nid)
+		if id < len(ss.shardState) {
+			ss.shardState[id].NodeList = append(ss.shardState[id].NodeList, nid)
+		} else {
+			utils.GetLogInstance().Error("assignNewNodes", "index out of range", len(ss.shardState), "id", id)
+		}
 	}
 }
 
diff --git a/node/node_handler.go b/node/node_handler.go
index 83a17d2f9..d211ac82b 100644
--- a/node/node_handler.go
+++ b/node/node_handler.go
@@ -126,10 +126,8 @@ func (node *Node) messageHandler(content []byte, sender string) {
 	case proto.Consensus:
 		msgPayload, _ := proto.GetConsensusMessagePayload(content)
 		if consensusObj.IsLeader {
-			utils.GetLogInstance().Info("NET: Leader received consensus message")
 			consensusObj.ProcessMessageLeader(msgPayload)
 		} else {
-			utils.GetLogInstance().Info("NET: Validator received consensus message")
 			consensusObj.ProcessMessageValidator(msgPayload)
 			// TODO(minhdoan): add logic to check if the current blockchain is not sync with other consensus
 			// we should switch to other state rather than DoingConsensus.
@@ -138,10 +136,8 @@ func (node *Node) messageHandler(content []byte, sender string) {
 		msgPayload, _ := proto.GetDRandMessagePayload(content)
 		if node.DRand != nil {
 			if node.DRand.IsLeader {
-				utils.GetLogInstance().Info("NET: DRand Leader received message")
 				node.DRand.ProcessMessageLeader(msgPayload)
 			} else {
-				utils.GetLogInstance().Info("NET: DRand Validator received message")
 				node.DRand.ProcessMessageValidator(msgPayload)
 			}
 		}
@@ -309,7 +305,6 @@ func (node *Node) VerifyNewBlock(newBlock *types.Block) bool {
 // 1. add the new block to blockchain
 // 2. [leader] send new block to the client
 func (node *Node) PostConsensusProcessing(newBlock *types.Block) {
-	utils.GetLogInstance().Info("PostConsensusProcessing")
 	if node.Consensus.IsLeader {
 		node.BroadcastNewBlock(newBlock)
 	} else {
@@ -413,7 +408,6 @@ func (node *Node) pingMessageHandler(msgPayload []byte, sender string) int {
 
 // SendPongMessage is the a goroutine to periodcally send pong message to all peers
 func (node *Node) SendPongMessage() {
-	utils.GetLogInstance().Info("Starting Pong routing")
 	tick := time.NewTicker(2 * time.Second)
 	tick2 := time.NewTicker(120 * time.Second)
 
@@ -583,8 +577,6 @@ func (node *Node) epochShardStateMessageHandler(msgPayload []byte) int {
 }
 
 func (node *Node) processEpochShardState(epochShardState *types.EpochShardState) {
-	utils.GetLogInstance().Error("[Processing new shard state]")
-
 	shardState := epochShardState.ShardState
 	epoch := epochShardState.Epoch
 
diff --git a/node/node_syncing.go b/node/node_syncing.go
index 4abac8a36..a6aa70f85 100644
--- a/node/node_syncing.go
+++ b/node/node_syncing.go
@@ -185,7 +185,6 @@ func (node *Node) CalculateResponse(request *downloader_pb.DownloaderRequest) (*
 	response := &downloader_pb.DownloaderResponse{}
 	switch request.Type {
 	case downloader_pb.DownloaderRequest_HEADER:
-		utils.GetLogInstance().Debug("[SYNC] CalculateResponse DownloaderRequest_HEADER", "request.BlockHash", request.BlockHash)
 		var startHeaderHash []byte
 		if request.BlockHash == nil {
 			tmp := node.blockchain.Genesis().Hash()
diff --git a/p2p/host/hostv2/hostv2.go b/p2p/host/hostv2/hostv2.go
index 193e2d2ff..eb7fa66d2 100644
--- a/p2p/host/hostv2/hostv2.go
+++ b/p2p/host/hostv2/hostv2.go
@@ -87,6 +87,9 @@ func (r *GroupReceiverImpl) Close() error {
 func (r *GroupReceiverImpl) Receive(ctx context.Context) (
 	msg []byte, sender libp2p_peer.ID, err error,
 ) {
+	if r.sub == nil {
+		return nil, libp2p_peer.ID(""), fmt.Errorf("GroupReceiver has been closed")
+	}
 	m, err := r.sub.Next(ctx)
 	if err == nil {
 		msg = m.Data
diff --git a/p2p/host/hostv2/hostv2_test.go b/p2p/host/hostv2/hostv2_test.go
index 01018a14e..b98203dfa 100644
--- a/p2p/host/hostv2/hostv2_test.go
+++ b/p2p/host/hostv2/hostv2_test.go
@@ -128,4 +128,11 @@ func TestHostV2_GroupReceiver(t *testing.T) {
 			t.Error("expected an error; got none")
 		}
 	})
+	t.Run("Closed", func(t *testing.T) {
+		var emptyReceiver GroupReceiverImpl
+		_, _, err := emptyReceiver.Receive(context.Background())
+		if err == nil {
+			t.Errorf("Receive() from nil/closed receiver did not return error")
+		}
+	})
 }