code review: Transport

src/main/java/logicface/Transport.java

@@ -1,5 +1,6 @@
 package logicface;
 
+import common.LoggerHelper;
 import encoding.*;
 import packet.LpPacket;
 import packet.PacketException;
@@ -33,11 +34,13 @@ public class Transport {
     public LpPacket parseByteArray2LpPacket(byte[] buf) throws LogicFaceException {
         try {
             Block block=new Block(buf,true);
-            if(block.isValid()){
+            if(!block.isValid()){
+                LoggerHelper.logger.error("recv packet from face invalid");
                 return null;
             }
             LpPacket lpPacket=new LpPacket();
             if(!lpPacket.wireDecode(block)){
+                LoggerHelper.logger.error("parse to lpPacket error");
                 return null;
             }
             return lpPacket;