diff --git a/source/libs/transport/src/transCli.c b/source/libs/transport/src/transCli.c
index 86533fddbe8f6ce19f68c25cf455450a3cd193fe..126b6cb91f5caa9229ce826132c2c24b81b3e596 100644
--- a/source/libs/transport/src/transCli.c
+++ b/source/libs/transport/src/transCli.c
@@ -173,6 +173,7 @@ static void         destroyThrdObj(SCliThrdObj* pThrd);
 
 #define REQUEST_NO_RESP(msg) ((msg)->noResp == 1)
 #define REQUEST_PERSIS_HANDLE(msg) ((msg)->persistHandle == 1)
+#define REQUEST_RELEASE_HANDLE(cmsg) ((cmsg)->type == Release)
 
 static void* cliWorkThread(void* arg);
 
@@ -509,7 +510,10 @@ void cliSend(SCliConn* pConn) {
   STrans*      pTransInst = pThrd->pTransInst;
 
   STransMsg* pMsg = (STransMsg*)(&pCliMsg->msg);
-
+  if (pMsg->pCont == 0) {
+    pMsg->pCont = (void*)rpcMallocCont(0);
+    pMsg->contLen = 0;
+  }
   STransMsgHead* pHead = transHeadFromCont(pMsg->pCont);
   int            msgLen = transMsgLenFromCont(pMsg->contLen);
 
@@ -537,6 +541,7 @@ void cliSend(SCliConn* pConn) {
   pHead->persist = REQUEST_PERSIS_HANDLE(pMsg) ? 1 : 0;
   pHead->msgType = pMsg->msgType;
   pHead->msgLen = (int32_t)htonl((uint32_t)msgLen);
+  pHead->release = REQUEST_RELEASE_HANDLE(pCliMsg) ? 1 : 0;
 
   uv_buf_t wb = uv_buf_init((char*)pHead, msgLen);
   tDebug("%s cli conn %p %s is send to %s:%d, local info %s:%d", CONN_GET_INST_LABEL(pConn), pConn,
@@ -546,6 +551,7 @@ void cliSend(SCliConn* pConn) {
   if (pHead->persist == 1) {
     CONN_SET_PERSIST_BY_APP(pConn);
   }
+
   pConn->writeReq.data = pConn;
   uv_write(&pConn->writeReq, (uv_stream_t*)pConn->stream, &wb, 1, cliSendCb);
 
@@ -586,22 +592,13 @@ static void cliHandleQuit(SCliMsg* pMsg, SCliThrdObj* pThrd) {
 }
 static void cliHandleRelease(SCliMsg* pMsg, SCliThrdObj* pThrd) {
   SCliConn* conn = pMsg->msg.handle;
-  tDebug("%s cli conn %p release to inst", CONN_GET_INST_LABEL(conn), conn);
-
-  while (taosArrayGetSize(conn->cliMsgs) > 0) {
-    SCliMsg* pMsg = taosArrayGetP(conn->cliMsgs, 0);
-    destroyCmsg(pMsg);
-    taosArrayRemove(conn->cliMsgs, 0);
-  }
+  tDebug("%s cli conn %p start to release to inst", CONN_GET_INST_LABEL(conn), conn);
 
-  transDestroyBuffer(&conn->readBuf);
-  conn->status = ConnRelease;
-  int ref = T_REF_VAL_GET(conn);
-  if (ref == 2) {
-    transUnrefCliHandle(conn);
-  } else if (ref == 1) {
-    addConnToPool(pThrd->pool, conn);
+  taosArrayPush(conn->cliMsgs, &pMsg);
+  if (taosArrayGetSize(conn->cliMsgs) >= 2) {
+    return;  // send one by one
   }
+  cliSend(conn);
 }
 
 SCliConn* cliGetConn(SCliMsg* pMsg, SCliThrdObj* pThrd) {
diff --git a/source/libs/transport/src/transSrv.c b/source/libs/transport/src/transSrv.c
index 79d1ab85a828ef1d64611aa0e57851ef851a1228..108b12542c1b89f5672f60f5242d8f98cd6baf70 100644
--- a/source/libs/transport/src/transSrv.c
+++ b/source/libs/transport/src/transSrv.c
@@ -93,6 +93,15 @@ typedef struct SServerObj {
 
 static const char* notify = "a";
 
+#define CONN_SHOULD_RELEASE(conn, head)                            \
+  do {                                                             \
+    if ((head)->release == 1 && (head->msgLen) == sizeof(*head)) { \
+      conn->status = ConnRelease;                                  \
+      transClearBuffer(&conn->readBuf);                            \
+      transFreeMsg(transContFromHead((char*)head));                \
+      goto _RETURE;                                                \
+    }                                                              \
+  } while (0)
 // refactor later
 static int transAddAuthPart(SSrvConn* pConn, char* msg, int msgLen);
 
@@ -233,6 +242,7 @@ static void uvHandleReq(SSrvConn* pConn) {
       pHead->msgLen -= sizeof(STransUserMsg);
     }
   }
+  CONN_SHOULD_RELEASE(pConn, pHead);
 
   STransMsg transMsg;
   transMsg.contLen = transContLenFromMsg(pHead->msgLen);
@@ -257,8 +267,8 @@ static void uvHandleReq(SSrvConn* pConn) {
            ntohs(pConn->locaddr.sin_port), transMsg.contLen);
   } else {
     tDebug("server conn %p %s received from %s:%d, local info: %s:%d, msg size: %d, resp:%d ", pConn,
-           TMSG_INFO(transMsg.msgType), inet_ntoa(pConn->addr.sin_addr), ntohs(pConn->addr.sin_port),
-           inet_ntoa(pConn->locaddr.sin_addr), ntohs(pConn->locaddr.sin_port), transMsg.contLen, pHead->noResp);
+           TMSG_INFO(transMsg.msgType), taosInetNtoa(pConn->addr.sin_addr), ntohs(pConn->addr.sin_port),
+           taosInetNtoa(pConn->locaddr.sin_addr), ntohs(pConn->locaddr.sin_port), transMsg.contLen, pHead->noResp);
     // no ref here
   }
 
@@ -270,6 +280,8 @@ static void uvHandleReq(SSrvConn* pConn) {
   (*pTransInst->cfp)(pTransInst->parent, &transMsg, NULL);
   // uv_timer_start(&pConn->pTimer, uvHandleActivityTimeout, pRpc->idleTime * 10000, 0);
   // auth
+_RETURE:
+  return;
 }
 
 void uvOnRecvCb(uv_stream_t* cli, ssize_t nread, const uv_buf_t* buf) {
@@ -350,7 +362,7 @@ void uvOnSendCb(uv_write_t* req, int status) {
     }
   } else {
     tError("server conn %p failed to write data, %s", conn, uv_err_name(status));
-    conn->broken = false;
+    conn->broken = true;
     transUnrefSrvHandle(conn);
   }
 }
@@ -407,6 +419,7 @@ static void uvStartSendResp(SSrvMsg* smsg) {
   SSrvConn* pConn = smsg->pConn;
 
   if (pConn->broken == true) {
+    // persist by
     transUnrefSrvHandle(pConn);
     return;
   }
@@ -415,8 +428,8 @@ static void uvStartSendResp(SSrvMsg* smsg) {
   }
 
   if (taosArrayGetSize(pConn->srvMsgs) > 0) {
-    tDebug("server conn %p send 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));
+    tDebug("server conn %p send data to client %s:%d, local info: %s:%d", pConn, taosInetNtoa(pConn->addr.sin_addr),
+           ntohs(pConn->addr.sin_port), taosInetNtoa(pConn->locaddr.sin_addr), ntohs(pConn->locaddr.sin_port));
     taosArrayPush(pConn->srvMsgs, &smsg);
     return;
   }