diff --git a/src/rpc/src/tudp.c b/src/rpc/src/tudp.c
old mode 100755
new mode 100644
index d707a199e7158061cabab4f3e25ff15dbe5385dd..a38871669c0e90cb4a91aaa30751e491c4515444
--- a/src/rpc/src/tudp.c
+++ b/src/rpc/src/tudp.c
@@ -30,6 +30,7 @@
 #define RPC_MAX_UDP_SIZE 65480
 
 int tsUdpDelay = 0;
+uint32_t tsPkgSig = 0;   // package signature, it is a random number to make sure start the sig will be different
 
 typedef struct {
   void *          signature;
@@ -80,6 +81,7 @@ typedef struct {
   uint64_t handle;
   uint16_t port;
   int32_t  msgLen;
+  uint32_t sig;
 } SPacketInfo;
 
 typedef struct {
@@ -100,15 +102,17 @@ typedef struct {
 } SMonitor;
 
 typedef struct {
+  uint32_t sig;
   uint64_t handle;
   uint64_t hash;
 } SHandleViaTcp;
 
 bool taosCheckHandleViaTcpValid(SHandleViaTcp *handleViaTcp) {
-  return handleViaTcp->hash == taosHashUInt64(handleViaTcp->handle);
+  return handleViaTcp->hash == taosHashUInt64(handleViaTcp->handle) && (handleViaTcp->sig == tsPkgSig);
 }
 
-void taosInitHandleViaTcp(SHandleViaTcp *handleViaTcp, uint64_t handle) {
+void taosInitHandleViaTcp(SHandleViaTcp *handleViaTcp, uint64_t handle, uint32_t sig) {
+  handleViaTcp->sig = sig;
   handleViaTcp->handle = handle;
   handleViaTcp->hash = taosHashUInt64(handleViaTcp->handle);
 }
@@ -155,7 +159,7 @@ void *taosReadTcpData(void *argv) {
   }
 
   SHandleViaTcp handleViaTcp;
-  taosInitHandleViaTcp(&handleViaTcp, pInfo->handle);
+  taosInitHandleViaTcp(&handleViaTcp, pInfo->handle, pInfo->sig);
   retLen = (int)taosWriteSocket(fd, (char *)&handleViaTcp, sizeof(SHandleViaTcp));
 
   if (retLen != (int)sizeof(SHandleViaTcp)) {
@@ -537,6 +541,9 @@ void *taosInitUdpConnection(char *ip, uint16_t port, char *label, int threads, v
 }
 
 void *taosInitUdpServer(char *ip, uint16_t port, char *label, int threads, void *fp, void *shandle) {
+  srand(time(NULL));
+  tsPkgSig = rand();
+
   SUdpConnSet *pSet;
   pSet = taosInitUdpConnection(ip, port, label, threads, fp, shandle);
   if (pSet == NULL) return NULL;
@@ -685,6 +692,7 @@ int taosSendPacketViaTcp(uint32_t ip, uint16_t port, char *data, int dataLen, vo
     pInfo->handle = (uint64_t)data;
     pInfo->port   = pSet->port;
     pInfo->msgLen = pHead->msgLen;
+    pInfo->sig    = tsPkgSig;
 
     msgLen = sizeof(STaosHeader) + sizeof(SPacketInfo);
     pHead->msgLen = (int32_t)htonl((uint32_t)msgLen);
@@ -717,7 +725,7 @@ int taosSendPacketViaTcp(uint32_t ip, uint16_t port, char *data, int dataLen, vo
       tError("%s failed to open TCP socket to:%s:%hu to send packet", pSet->label, ipstr, pConn->port);
     } else {
       SHandleViaTcp handleViaTcp;
-      taosInitHandleViaTcp(&handleViaTcp, 0);
+      taosInitHandleViaTcp(&handleViaTcp, 0, tsPkgSig);
       retLen = (int)taosWriteSocket(fd, (char *)&handleViaTcp, sizeof(SHandleViaTcp));
 
       if (retLen != (int)sizeof(handleViaTcp)) {