diff --git a/src/main/java/org/tron/common/overlay/discover/NodeHandler.java b/src/main/java/org/tron/common/overlay/discover/NodeHandler.java
index e48d59e2e83..39c60d6d1ed 100644
--- a/src/main/java/org/tron/common/overlay/discover/NodeHandler.java
+++ b/src/main/java/org/tron/common/overlay/discover/NodeHandler.java
@@ -281,7 +281,7 @@ void sendPing() {
     }
 
     void sendPong() {
-        Message pong = new PongMessage(node);
+        Message pong = new PongMessage(nodeManager.getPublicHomeNode());
         logMessage(pong, false);
         sendMessage(pong);
         getNodeStatistics().discoverOutPong.add();
diff --git a/src/main/java/org/tron/common/overlay/discover/NodeManager.java b/src/main/java/org/tron/common/overlay/discover/NodeManager.java
index 3d906851c61..d8d992a3ca3 100644
--- a/src/main/java/org/tron/common/overlay/discover/NodeManager.java
+++ b/src/main/java/org/tron/common/overlay/discover/NodeManager.java
@@ -94,9 +94,7 @@ public void run() {
 
     this.pongTimer = Executors.newSingleThreadScheduledExecutor();
 
-    for (Node node : args.getNodeActive()) {
-        getNodeHandler(node).getNodeStatistics().setPredefined(true);
-    }
+
   }
 
   public ScheduledExecutorService getPongTimer() {
@@ -132,9 +130,19 @@ public void run() {
       for (Node node : bootNodes) {
         getNodeHandler(node);
       }
+
+      for (Node node : args.getNodeActive()) {
+        getNodeHandler(node).getNodeStatistics().setPredefined(true);
+      }
     }
   }
 
+  public boolean isNodeAlive(NodeHandler nodeHandler){
+    return  nodeHandler.state.equals(State.Alive) ||
+            nodeHandler.state.equals(State.Active) ||
+            nodeHandler.state.equals(State.EvictCandidate);
+  }
+
   private void dbRead() {
     Set<Node> Nodes = this.dbManager.readNeighbours();
     logger.info("Reading Node statistics from PeersStore: " + Nodes.size() + " nodes.");
@@ -145,7 +153,7 @@ private void dbWrite() {
     Set<Node> batch = new HashSet<>();
     synchronized (this) {
       for (NodeHandler nodeHandler: nodeHandlerMap.values()){
-        if (!nodeHandler.state.equals(NodeHandler.State.Dead)) {
+        if (isNodeAlive(nodeHandler)) {
           batch.add(nodeHandler.getNode());
         }
       }
diff --git a/src/main/java/org/tron/common/overlay/server/HandshakeHandler.java b/src/main/java/org/tron/common/overlay/server/HandshakeHandler.java
index a16b553e13e..6e0e0ccf935 100644
--- a/src/main/java/org/tron/common/overlay/server/HandshakeHandler.java
+++ b/src/main/java/org/tron/common/overlay/server/HandshakeHandler.java
@@ -83,6 +83,8 @@ protected void decode(ChannelHandlerContext ctx, ByteBuf buffer, List<Object> ou
     final HelloMessage helloMessage = (HelloMessage) msg;
 
     if (helloMessage.getVersion() != Args.getInstance().getNodeP2pVersion()) {
+      logger.info("version not support, you[{}] version[{}], my version[{}]",
+              ctx.channel().remoteAddress(), helloMessage.getVersion(), Args.getInstance().getNodeP2pVersion());
       ctx.close();
       return;
     }
diff --git a/src/main/java/org/tron/common/overlay/server/SyncPool.java b/src/main/java/org/tron/common/overlay/server/SyncPool.java
index 8f01567e038..90721acfdd8 100644
--- a/src/main/java/org/tron/common/overlay/server/SyncPool.java
+++ b/src/main/java/org/tron/common/overlay/server/SyncPool.java
@@ -199,9 +199,7 @@ public boolean test(NodeHandler handler) {
 
       //TODO: use reputation sysytem
 
-      if (handler.getState().equals(NodeHandler.State.Discovered) ||
-              handler.getState().equals(NodeHandler.State.Dead) ||
-              handler.getState().equals(NodeHandler.State.NonActive)){
+      if (!nodeManager.isNodeAlive(handler)){
         return false;
       }