diff --git a/include/libs/transport/trpc.h b/include/libs/transport/trpc.h
index 5e3860822ec161ef52eece2931b7c71dee4fb40d..101092f13e004286eef466d74598444ef2689157 100644
--- a/include/libs/transport/trpc.h
+++ b/include/libs/transport/trpc.h
@@ -86,7 +86,7 @@ typedef struct SRpcInit {
 
 int32_t rpcInit();
 void    rpcCleanup();
-void   *rpcOpen(const SRpcInit *pRpc);
+void *  rpcOpen(const SRpcInit *pRpc);
 void    rpcClose(void *);
 void *  rpcMallocCont(int contLen);
 void    rpcFreeCont(void *pCont);
@@ -99,6 +99,9 @@ void    rpcSendRecv(void *shandle, SEpSet *pEpSet, SRpcMsg *pReq, SRpcMsg *pRsp)
 int     rpcReportProgress(void *pConn, char *pCont, int contLen);
 void    rpcCancelRequest(int64_t rid);
 
+void rpcRefHandle(void *handle, int8_t type);
+void rpcUnrefHandle(void *handle, int8_t type);
+
 #ifdef __cplusplus
 }
 #endif
diff --git a/source/libs/transport/inc/transComm.h b/source/libs/transport/inc/transComm.h
index cd6c78cbdcd7fc293e4fdac3d998a1499558d09c..f2ac77fe61e41cbc8d041cfb82d80d3a39f0e505 100644
--- a/source/libs/transport/inc/transComm.h
+++ b/source/libs/transport/inc/transComm.h
@@ -242,8 +242,11 @@ int  transAllocBuffer(SConnBuffer* connBuf, uv_buf_t* uvBuf);
 bool transReadComplete(SConnBuffer* connBuf);
 
 int transSetConnOption(uv_tcp_t* stream);
-// int transPackMsg(SRpcMsg *rpcMsg, bool sercured, bool auth, char **msg, int32_t *msgLen);
 
-// int transUnpackMsg(char *msg, SRpcMsg *pMsg, bool );
+void transRefSrvHandle(void* handle);
+void transUnrefSrvHandle(void* handle);
+
+void transRefCliHandle(void* handle);
+void transUnrefCliHandle(void* handle);
 
 #endif
diff --git a/source/libs/transport/src/trans.c b/source/libs/transport/src/trans.c
index b45683617f6343f5df79fb85e95e44aac3a8c056..f3e04173972a63a7662078901d1aa8335c158f5e 100644
--- a/source/libs/transport/src/trans.c
+++ b/source/libs/transport/src/trans.c
@@ -122,4 +122,17 @@ void rpcCleanup(void) {
   //
   return;
 }
+
+void (*taosRefHandle[])(void* handle) = {transRefSrvHandle, transRefCliHandle};
+void (*taosUnRefHandle[])(void* handle) = {transUnrefSrvHandle, transUnrefCliHandle};
+
+void rpcRefHandle(void* handle, int8_t type) {
+  assert(type == TAOS_CONN_SERVER || type == TAOS_CONN_CLIENT);
+  (*taosRefHandle[type])(handle);
+}
+void rpcUnrefHandle(void* handle, int8_t type) {
+  assert(type == TAOS_CONN_SERVER || type == TAOS_CONN_CLIENT);
+  (*taosUnRefHandle[type])(handle);
+}
+
 #endif
diff --git a/source/libs/transport/src/transCli.c b/source/libs/transport/src/transCli.c
index a417a57436c9b23678aa477028c4dd748c2d9c87..0d3946d967bb745bd82794590ffe0fb238e95eec 100644
--- a/source/libs/transport/src/transCli.c
+++ b/source/libs/transport/src/transCli.c
@@ -351,14 +351,11 @@ static void clientConnDestroy(SCliConn* conn, bool clear) {
 }
 static void clientDestroy(uv_handle_t* handle) {
   SCliConn* conn = handle->data;
-  // transDestroyBuffer(&conn->readBuf);
 
   free(conn->stream);
   free(conn->writeReq);
-  tTrace("client conn %p destroy successfully", conn);
+  tTrace("%s client conn %p destroy successfully", CONN_GET_INST_LABEL(conn), conn);
   free(conn);
-
-  // clientConnDestroy(conn, false);
 }
 
 static void clientWriteCb(uv_write_t* req, int status) {
@@ -454,8 +451,7 @@ static void clientHandleQuit(SCliMsg* pMsg, SCliThrdObj* pThrd) {
 static void clientHandleReq(SCliMsg* pMsg, SCliThrdObj* pThrd) {
   uint64_t et = taosGetTimestampUs();
   uint64_t el = et - pMsg->st;
-  tTrace("client msg tran time cost: %" PRIu64 "us", el);
-  et = taosGetTimestampUs();
+  tTrace("%s client msg tran time cost: %" PRIu64 "us", ((SRpcInfo*)pThrd->pTransInst)->label, el);
 
   STransConnCtx* pCtx = pMsg->ctx;
   SRpcInfo*      pTransInst = pThrd->pTransInst;
@@ -630,8 +626,6 @@ static void transDestroyConnCtx(STransConnCtx* ctx) {
 static void clientSendQuit(SCliThrdObj* thrd) {
   // cli can stop gracefully
   SCliMsg* msg = calloc(1, sizeof(SCliMsg));
-  msg->ctx = NULL;  //
-
   transSendAsync(thrd->asyncPool, &msg->q);
 }
 void taosCloseClient(void* arg) {
@@ -650,6 +644,23 @@ static int clientRBChoseIdx(SRpcInfo* pTransInst) {
   }
   return index % pTransInst->numOfThreads;
 }
+void transRefCliHandle(void* handle) {
+  if (handle == NULL) {
+    return;
+  }
+  int ref = T_REF_INC((SCliConn*)handle);
+  UNUSED(ref);
+}
+void transUnrefCliHandle(void* handle) {
+  if (handle == NULL) {
+    return;
+  }
+  int ref = T_REF_DEC((SCliConn*)handle);
+  if (ref == 0) {
+  }
+
+  // unref cli handle
+}
 void rpcSendRequest(void* shandle, const SEpSet* pEpSet, SRpcMsg* pMsg, int64_t* pRid) {
   // impl later
   char*    ip = (char*)(pEpSet->eps[pEpSet->inUse].fqdn);
diff --git a/source/libs/transport/src/transSrv.c b/source/libs/transport/src/transSrv.c
index cd02d3bd77d45c2fdbc483f3e0b67c49eebbce51..432ec472fbe55786a3d6e25f37c8cc76657b2b34 100644
--- a/source/libs/transport/src/transSrv.c
+++ b/source/libs/transport/src/transSrv.c
@@ -33,11 +33,11 @@ typedef struct SSrvConn {
   void*       ahandle;     //
   void*       hostThrd;
   SArray*     srvMsgs;
-  // void*       pSrvMsg;
+
+  bool broken;  // conn broken;
 
   struct sockaddr_in addr;
   struct sockaddr_in locaddr;
-
   // SRpcMsg sendMsg;
   // del later
   char secured;
@@ -206,7 +206,6 @@ static void uvHandleReq(SSrvConn* pConn) {
   }
 
   pConn->inType = pHead->msgType;
-  // assert(transIsReq(pHead->msgType));
 
   SRpcInfo* pRpc = (SRpcInfo*)p->shandle;
   pHead->code = htonl(pHead->code);
@@ -230,7 +229,8 @@ static void uvHandleReq(SSrvConn* pConn) {
   rpcMsg.handle = pConn;
 
   transClearBuffer(&pConn->readBuf);
-  pConn->ref++;
+
+  transRefSrvHandle(pConn);
   tDebug("server conn %p %s received from %s:%d, local info: %s:%d, msg size: %d", pConn, TMSG_INFO(rpcMsg.msgType),
          inet_ntoa(pConn->addr.sin_addr), ntohs(pConn->addr.sin_port), inet_ntoa(pConn->locaddr.sin_addr),
          ntohs(pConn->locaddr.sin_port), rpcMsg.contLen);
@@ -255,23 +255,20 @@ void uvOnReadCb(uv_stream_t* cli, ssize_t nread, const uv_buf_t* buf) {
     }
     return;
   }
-  if (nread == UV_EOF) {
-    tError("server conn %p read error: %s", conn, uv_err_name(nread));
-    if (conn->ref > 1) {
-      conn->ref++;  // ref > 1 signed that write is in progress
-    }
-    destroyConn(conn, true);
-    return;
-  }
   if (nread == 0) {
     return;
   }
-  if (nread < 0 || nread != UV_EOF) {
-    if (conn->ref > 1) {
-      conn->ref++;  // ref > 1 signed that write is in progress
-    }
-    tError("server conn %p read error: %s", conn, uv_err_name(nread));
-    destroyConn(conn, true);
+
+  tError("server conn %p read error: %s", conn, uv_err_name(nread));
+  if (nread < 0 || nread == UV_EOF) {
+    conn->broken = true;
+    transUnrefSrvHandle(conn);
+
+    // if (conn->ref > 1) {
+    //  conn->ref++;  // ref > 1 signed that write is in progress
+    //}
+    // tError("server conn %p read error: %s", conn, uv_err_name(nread));
+    // destroyConn(conn, true);
   }
 }
 void uvAllocConnBufferCb(uv_handle_t* handle, size_t suggested_size, uv_buf_t* buf) {
@@ -304,10 +301,9 @@ void uvOnWriteCb(uv_write_t* req, int status) {
     }
   } else {
     tError("server conn %p failed to write data, %s", conn, uv_err_name(status));
-    //
-    destroyConn(conn, true);
+    conn->broken = false;
+    transUnrefSrvHandle(conn);
   }
-  // opt
 }
 static void uvOnPipeWriteCb(uv_write_t* req, int status) {
   if (status == 0) {
@@ -353,15 +349,18 @@ static void uvStartSendRespInternal(SSrvMsg* smsg) {
 
   SSrvConn* pConn = smsg->pConn;
   uv_timer_stop(pConn->pTimer);
-
-  // pConn->pSrvMsg = smsg;
-  // conn->pWriter->data = smsg;
   uv_write(pConn->pWriter, (uv_stream_t*)pConn->pTcp, &wb, 1, uvOnWriteCb);
 }
 static void uvStartSendResp(SSrvMsg* smsg) {
   // impl
   SSrvConn* pConn = smsg->pConn;
-  pConn->ref--;  //
+
+  if (pConn->broken == true) {
+    transUnrefSrvHandle(pConn);
+    return;
+  }
+  transUnrefSrvHandle(pConn);
+
   if (taosArrayGetSize(pConn->srvMsgs) > 0) {
     tDebug("server conn %p push data to client %s:%d, local info: %s:%d", pConn, inet_ntoa(pConn->addr.sin_addr),
            ntohs(pConn->addr.sin_port), inet_ntoa(pConn->locaddr.sin_addr), ntohs(pConn->locaddr.sin_port));
@@ -386,7 +385,8 @@ static void destroyAllConn(SWorkThrdObj* pThrd) {
     QUEUE_INIT(h);
 
     SSrvConn* c = QUEUE_DATA(h, SSrvConn, queue);
-    destroyConn(c, true);
+    transUnrefSrvHandle(c);
+    // destroyConn(c, true);
   }
 }
 void uvWorkerAsyncCb(uv_async_t* handle) {
@@ -394,11 +394,11 @@ void uvWorkerAsyncCb(uv_async_t* handle) {
   SWorkThrdObj* pThrd = item->pThrd;
   SSrvConn*     conn = NULL;
   queue         wq;
+
   // batch process to avoid to lock/unlock frequently
   pthread_mutex_lock(&item->mtx);
   QUEUE_MOVE(&item->qmsg, &wq);
   pthread_mutex_unlock(&item->mtx);
-  // pthread_mutex_unlock(&mtx);
 
   while (!QUEUE_IS_EMPTY(&wq)) {
     queue* head = QUEUE_HEAD(&wq);
@@ -411,7 +411,6 @@ void uvWorkerAsyncCb(uv_async_t* handle) {
     }
     if (msg->pConn == NULL) {
       free(msg);
-
       destroyAllConn(pThrd);
 
       uv_loop_close(pThrd->loop);
@@ -601,7 +600,9 @@ static SSrvConn* createConn(void* hThrd) {
   QUEUE_PUSH(&pThrd->conn, &pConn->queue);
   pConn->srvMsgs = taosArrayInit(2, sizeof(void*));  //
   tTrace("conn %p created", pConn);
-  ++pConn->ref;
+
+  pConn->broken = false;
+  transRefSrvHandle(pConn);
   return pConn;
 }
 
@@ -609,10 +610,6 @@ static void destroyConn(SSrvConn* conn, bool clear) {
   if (conn == NULL) {
     return;
   }
-  tTrace("server conn %p try to destroy, ref: %d", conn, conn->ref);
-  if (--conn->ref > 0) {
-    return;
-  }
   transDestroyBuffer(&conn->readBuf);
 
   for (int i = 0; i < taosArrayGetSize(conn->srvMsgs); i++) {
@@ -624,9 +621,9 @@ static void destroyConn(SSrvConn* conn, bool clear) {
 
   if (clear) {
     tTrace("try to destroy conn %p", conn);
-    uv_tcp_close_reset(conn->pTcp, uvDestroyConn);
-    // uv_shutdown_t* req = malloc(sizeof(uv_shutdown_t));
-    // uv_shutdown(req, (uv_stream_t*)conn->pTcp, uvShutDownCb);
+    // uv_tcp_close_reset(conn->pTcp, uvDestroyConn);
+    uv_shutdown_t* req = malloc(sizeof(uv_shutdown_t));
+    uv_shutdown(req, (uv_stream_t*)conn->pTcp, uvShutDownCb);
     // uv_unref((uv_handle_t*)conn->pTcp);
     // uv_close((uv_handle_t*)conn->pTcp, uvDestroyConn);
   }
@@ -722,8 +719,6 @@ void destroyWorkThrd(SWorkThrdObj* pThrd) {
   pthread_join(pThrd->thread, NULL);
   free(pThrd->loop);
   transDestroyAsyncPool(pThrd->asyncPool);
-
-  // free(pThrd->workerAsync);
   free(pThrd);
 }
 void sendQuitToWorkThrd(SWorkThrdObj* pThrd) {
@@ -757,6 +752,27 @@ void taosCloseServer(void* arg) {
   free(srv);
 }
 
+void transRefSrvHandle(void* handle) {
+  if (handle == NULL) {
+    return;
+  }
+  SSrvConn* conn = handle;
+
+  int ref = T_REF_INC((SSrvConn*)handle);
+  UNUSED(ref);
+}
+
+void transUnrefSrvHandle(void* handle) {
+  if (handle == NULL) {
+    return;
+  }
+  int ref = T_REF_DEC((SSrvConn*)handle);
+
+  if (ref == 0) {
+    destroyConn((SSrvConn*)handle, true);
+  }
+  // unref srv handle
+}
 void rpcSendResponse(const SRpcMsg* pMsg) {
   if (pMsg->handle == NULL) {
     return;