diff --git a/include/common/tmsg.h b/include/common/tmsg.h
index 807a44a532..5ea53b5510 100644
--- a/include/common/tmsg.h
+++ b/include/common/tmsg.h
@@ -326,6 +326,13 @@ int32_t tDecodeSEpSet(SCoder* pDecoder, SEpSet* pEp);
 int32_t taosEncodeSEpSet(void** buf, const SEpSet* pEp);
 void*   taosDecodeSEpSet(const void* buf, SEpSet* pEp);
 
+typedef struct {
+  SEpSet epSet;
+} SMEpSet;
+
+int32_t tSerializeSMEpSet(void* buf, int32_t bufLen, SMEpSet* pReq);
+int32_t tDeserializeSMEpSet(void* buf, int32_t buflen, SMEpSet* pReq);
+
 typedef struct {
   int8_t  connType;
   int32_t pid;
@@ -2725,6 +2732,7 @@ static FORCE_INLINE void* tDecodeSMqCMGetSubEpRsp(void* buf, SMqCMGetSubEpRsp* p
   }
   return buf;
 }
+
 #pragma pack(pop)
 
 #ifdef __cplusplus
diff --git a/include/libs/transport/trpc.h b/include/libs/transport/trpc.h
index 3e2f596784..ab26cfc155 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/common/src/tmsg.c b/source/common/src/tmsg.c
index c6bef560a9..0ea196f1a1 100644
--- a/source/common/src/tmsg.c
+++ b/source/common/src/tmsg.c
@@ -844,6 +844,27 @@ void tFreeSMAltertbReq(SMAltertbReq *pReq) {
   taosArrayDestroy(pReq->pFields);
   pReq->pFields = NULL;
 }
+int32_t tSerializeSMEpSet(void *buf, int32_t bufLen, SMEpSet *pReq) {
+  SCoder encoder = {0};
+  tCoderInit(&encoder, TD_LITTLE_ENDIAN, buf, bufLen, TD_ENCODER);
+  if (tStartEncode(&encoder) < 0) return -1;
+  if (tEncodeSEpSet(&encoder, &pReq->epSet) < 0) return -1;
+
+  tEndEncode(&encoder);
+  int32_t tlen = encoder.pos;
+  tCoderClear(&encoder);
+  return tlen;
+}
+int32_t tDeserializeSMEpSet(void *buf, int32_t bufLen, SMEpSet *pReq) {
+  SCoder decoder = {0};
+  tCoderInit(&decoder, TD_LITTLE_ENDIAN, buf, bufLen, TD_DECODER);
+  if (tStartDecode(&decoder) < 0) return -1;
+  if (tDecodeSEpSet(&decoder, &pReq->epSet) < 0) return -1;
+
+  tEndDecode(&decoder);
+  tCoderClear(&decoder);
+  return 0;
+}
 
 int32_t tSerializeSMCreateSmaReq(void *buf, int32_t bufLen, SMCreateSmaReq *pReq) {
   SCoder encoder = {0};
diff --git a/source/libs/transport/inc/transportInt.h b/source/libs/transport/inc/transportInt.h
index ad50948a02..eaca9b0fc7 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 ebb90338cd..fa517d6d61 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;
@@ -100,11 +101,10 @@ void rpcSendRedirectRsp(void* thandle, const SEpSet* pEpSet) {
   SRpcMsg rpcMsg;
   memset(&rpcMsg, 0, sizeof(rpcMsg));
 
-  rpcMsg.contLen = sizeof(SEpSet);
-  rpcMsg.pCont = rpcMallocCont(rpcMsg.contLen);
-  if (rpcMsg.pCont == NULL) return;
-
-  memcpy(rpcMsg.pCont, pEpSet, sizeof(SEpSet));
+  SMEpSet msg = {.epSet = *pEpSet};
+  int32_t len = tSerializeSMEpSet(NULL, 0, &msg);
+  rpcMsg.pCont = rpcMallocCont(len);
+  tSerializeSMEpSet(rpcMsg.pCont, len, &msg);
 
   rpcMsg.code = TSDB_CODE_RPC_REDIRECT;
   rpcMsg.handle = thandle;
diff --git a/source/libs/transport/src/transCli.c b/source/libs/transport/src/transCli.c
index b81310b90b..b43b8a1e0c 100644
--- a/source/libs/transport/src/transCli.c
+++ b/source/libs/transport/src/transCli.c
@@ -31,12 +31,8 @@ typedef struct SCliConn {
   int          hThrdIdx;
   STransCtx    ctx;
 
-  bool       broken;   // link broken or not
-  ConnStatus status;   //
-  int        release;  // 1: release
-  // spi configure
-  char spi;
-  char secured;
+  bool       broken;  // link broken or not
+  ConnStatus status;  //
 
   char*    ip;
   uint32_t port;
@@ -44,7 +40,6 @@ typedef struct SCliConn {
   // debug and log info
   struct sockaddr_in addr;
   struct sockaddr_in locaddr;
-
 } SCliConn;
 
 typedef struct SCliMsg {
@@ -102,6 +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);
@@ -303,8 +300,6 @@ void cliHandleResp(SCliConn* conn) {
          TMSG_INFO(pHead->msgType), taosInetNtoa(conn->addr.sin_addr), ntohs(conn->addr.sin_port),
          taosInetNtoa(conn->locaddr.sin_addr), ntohs(conn->locaddr.sin_port), transMsg.contLen);
 
-  conn->secured = pHead->secured;
-
   if (pCtx == NULL && CONN_NO_PERSIST_BY_APP(conn)) {
     tTrace("except, server continue send while cli ignore it");
     // transUnrefCliHandle(conn);
@@ -318,7 +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));
@@ -384,7 +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));
@@ -884,6 +881,18 @@ 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) {
+    SMEpSet emsg = {0};
+    tDeserializeSMEpSet(transMsg->pCont, transMsg->contLen, &emsg);
+    pTransInst->retry(pTransInst, transMsg, &(emsg.epSet));
+  } else {
+    pTransInst->cfp(pTransInst->parent, transMsg, NULL);
+  }
+}
 
 void transCloseClient(void* arg) {
   SCliObj* cli = arg;
diff --git a/source/libs/transport/src/transSrv.c b/source/libs/transport/src/transSrv.c
index ec66f3e8df..59a30051ef 100644
--- a/source/libs/transport/src/transSrv.c
+++ b/source/libs/transport/src/transSrv.c
@@ -30,7 +30,6 @@ typedef struct SSrvConn {
   uv_timer_t pTimer;
 
   queue       queue;
-  int         ref;
   int         persist;  // persist connection or not
   SConnBuffer readBuf;  // read buf,
   int         inType;
@@ -692,8 +691,6 @@ static void uvDestroyConn(uv_handle_t* handle) {
   if (thrd->quit && QUEUE_IS_EMPTY(&thrd->conn)) {
     tTrace("work thread quit");
     uv_walk(thrd->loop, uvWalkCb, NULL);
-    // uv_loop_close(thrd->loop);
-    // uv_stop(thrd->loop);
   }
 }
 
@@ -756,8 +753,6 @@ void uvHandleQuit(SSrvMsg* msg, SWorkThrdObj* thrd) {
   thrd->quit = true;
   if (QUEUE_IS_EMPTY(&thrd->conn)) {
     uv_walk(thrd->loop, uvWalkCb, NULL);
-    // uv_loop_close(thrd->loop);
-    // uv_stop(thrd->loop);
   } else {
     destroyAllConn(thrd);
   }
@@ -851,10 +846,8 @@ void transRefSrvHandle(void* handle) {
   if (handle == NULL) {
     return;
   }
-  SSrvConn* conn = handle;
-
   int ref = T_REF_INC((SSrvConn*)handle);
-  UNUSED(ref);
+  tDebug("server conn %p ref count: %d", handle, ref);
 }
 
 void transUnrefSrvHandle(void* handle) {