diff --git a/include/libs/transport/trpc.h b/include/libs/transport/trpc.h
index 3e2f5967840805cde8b9a37d4e437900965f42e3..ab26cfc1555b6f50a064fb8ab41a91bad62d7b88 100644
--- a/include/libs/transport/trpc.h
+++ b/include/libs/transport/trpc.h
@@ -54,12 +54,13 @@ typedef struct {
   uint16_t clientPort;
   SRpcMsg  rpcMsg;
   int32_t  rspLen;
-  void    *pRsp;
-  void    *pNode;
+  void *   pRsp;
+  void *   pNode;
 } SNodeMsg;
 
 typedef void (*RpcCfp)(void *parent, SRpcMsg *, SEpSet *);
 typedef int (*RpcAfp)(void *parent, char *tableId, char *spi, char *encrypt, char *secret, char *ckey);
+typedef int (*RpcRfp)(void *parent, SRpcMsg *, SEpSet *);
 
 typedef struct SRpcInit {
   uint16_t localPort;     // local port
@@ -80,22 +81,25 @@ typedef struct SRpcInit {
   RpcCfp cfp;
 
   // call back to retrieve the client auth info, for server app only
-  RpcAfp afp;;
+  RpcAfp afp;
+
+  // user defined retry func
+  RpcRfp rfp;
 
   void *parent;
 } SRpcInit;
 
 typedef struct {
-  void     *val;
+  void *val;
   int32_t (*clone)(void *src, void **dst);
-  void    (*freeFunc)(const void *arg);
+  void (*freeFunc)(const void *arg);
 } SRpcCtxVal;
 
 typedef struct {
-  int32_t   msgType;
-  void     *val;
+  int32_t msgType;
+  void *  val;
   int32_t (*clone)(void *src, void **dst);
-  void    (*freeFunc)(const void *arg);
+  void (*freeFunc)(const void *arg);
 } SRpcBrokenlinkVal;
 
 typedef struct {
diff --git a/source/libs/transport/inc/transportInt.h b/source/libs/transport/inc/transportInt.h
index ad50948a021ac663bcc012ff6cbf08f86a354e4e..eaca9b0fc765ddee699db235733d9508dd45dc36 100644
--- a/source/libs/transport/inc/transportInt.h
+++ b/source/libs/transport/inc/transportInt.h
@@ -63,13 +63,14 @@ typedef struct {
 
   void (*cfp)(void* parent, SRpcMsg*, SEpSet*);
   int (*afp)(void* parent, char* user, char* spi, char* encrypt, char* secret, char* ckey);
+  int (*retry)(void* parent, SRpcMsg*, SEpSet*);
 
-  int32_t         refCount;
-  void*           parent;
-  void*           idPool;     // handle to ID pool
-  void*           tmrCtrl;    // handle to timer
-  SHashObj*       hash;       // handle returned by hash utility
-  void*           tcphandle;  // returned handle from TCP initialization
+  int32_t       refCount;
+  void*         parent;
+  void*         idPool;     // handle to ID pool
+  void*         tmrCtrl;    // handle to timer
+  SHashObj*     hash;       // handle returned by hash utility
+  void*         tcphandle;  // returned handle from TCP initialization
   TdThreadMutex mutex;
 } SRpcInfo;
 
diff --git a/source/libs/transport/src/trans.c b/source/libs/transport/src/trans.c
index 5f9af2eb48715f2f969f6a20b4e53b771f0055ba..fa517d6d61cca34395dd5648a4146a446b9e2e64 100644
--- a/source/libs/transport/src/trans.c
+++ b/source/libs/transport/src/trans.c
@@ -39,6 +39,7 @@ void* rpcOpen(const SRpcInit* pInit) {
   // register callback handle
   pRpc->cfp = pInit->cfp;
   pRpc->afp = pInit->afp;
+  pRpc->retry = pInit->rfp;
 
   if (pInit->connType == TAOS_CONN_SERVER) {
     pRpc->numOfThreads = pInit->numOfThreads > TSDB_MAX_RPC_THREADS ? TSDB_MAX_RPC_THREADS : pInit->numOfThreads;
diff --git a/source/libs/transport/src/transCli.c b/source/libs/transport/src/transCli.c
index b2d0e7f020af25a93603b4484593040b7a296c78..46eb0404686f4c48a7cba654a23ee3f9000bbe5e 100644
--- a/source/libs/transport/src/transCli.c
+++ b/source/libs/transport/src/transCli.c
@@ -97,6 +97,8 @@ static void cliSendCb(uv_write_t* req, int status);
 static void cliConnCb(uv_connect_t* req, int status);
 static void cliAsyncCb(uv_async_t* handle);
 
+static void cliAppCb(SCliConn* pConn, STransMsg* pMsg);
+
 static SCliConn* cliCreateConn(SCliThrdObj* thrd);
 static void      cliDestroyConn(SCliConn* pConn, bool clear /*clear tcp handle or not*/);
 static void      cliDestroy(uv_handle_t* handle);
@@ -311,7 +313,8 @@ void cliHandleResp(SCliConn* conn) {
 
   if (pCtx == NULL || pCtx->pSem == NULL) {
     tTrace("%s cli conn %p handle resp", pTransInst->label, conn);
-    (pTransInst->cfp)(pTransInst->parent, &transMsg, NULL);
+    cliAppCb(conn, &transMsg);
+    //(pTransInst->cfp)(pTransInst->parent, &transMsg, NULL);
   } else {
     tTrace("%s cli conn(sync) %p handle resp", pTransInst->label, conn);
     memcpy((char*)pCtx->pRsp, (char*)&transMsg, sizeof(transMsg));
@@ -377,7 +380,8 @@ void cliHandleExcept(SCliConn* pConn) {
         once = true;
         continue;
       }
-      (pTransInst->cfp)(pTransInst->parent, &transMsg, NULL);
+      cliAppCb(pConn, &transMsg);
+      //(pTransInst->cfp)(pTransInst->parent, &transMsg, NULL);
     } else {
       tTrace("%s cli conn(sync) %p handle except", pTransInst->label, pConn);
       memcpy((char*)(pCtx->pRsp), (char*)(&transMsg), sizeof(transMsg));
@@ -877,6 +881,16 @@ int cliRBChoseIdx(STrans* pTransInst) {
   }
   return index % pTransInst->numOfThreads;
 }
+void cliAppCb(SCliConn* pConn, STransMsg* transMsg) {
+  SCliThrdObj* pThrd = pConn->hostThrd;
+  STrans*      pTransInst = pThrd->pTransInst;
+
+  if (transMsg->code == TSDB_CODE_RPC_REDIRECT && pTransInst->retry != NULL) {
+    // impl retry
+  } else {
+    (*pTransInst->cfp)(pTransInst->parent, transMsg, NULL);
+  }
+}
 
 void transCloseClient(void* arg) {
   SCliObj* cli = arg;