diff --git a/src/client/src/tscServer.c b/src/client/src/tscServer.c
index 8dd5ef69f7a6eb9811779debf99d77240567becd..a3d3b035e2c4564acd34a71fe1c1490ddc25ec75 100644
--- a/src/client/src/tscServer.c
+++ b/src/client/src/tscServer.c
@@ -191,7 +191,8 @@ int tscSendMsgToServer(SSqlObj *pSql) {
       .msgType = pSql->cmd.msgType,
       .pCont   = pMsg,
       .contLen = pSql->cmd.payloadLen,
-      .handle  = pSql,
+      .ahandle = pSql,
+      .handle  = &pSql->pRpcCtx,
       .code    = 0
   };
 
@@ -199,12 +200,12 @@ int tscSendMsgToServer(SSqlObj *pSql) {
   // Otherwise, the pSql object may have been released already during the response function, which is
   // processMsgFromServer function. In the meanwhile, the assignment of the rpc context to sql object will absolutely
   // cause crash.
-  /*pSql->pRpcCtx = */rpcSendRequest(pObj->pDnodeConn, &pSql->ipList, &rpcMsg);
+  rpcSendRequest(pObj->pDnodeConn, &pSql->ipList, &rpcMsg);
   return TSDB_CODE_SUCCESS;
 }
 
 void tscProcessMsgFromServer(SRpcMsg *rpcMsg, SRpcIpSet *pIpSet) {
-  SSqlObj *pSql = (SSqlObj *)rpcMsg->handle;
+  SSqlObj *pSql = (SSqlObj *)rpcMsg->ahandle;
   if (pSql == NULL || pSql->signature != pSql) {
     tscError("%p sql is already released", pSql);
     return;
diff --git a/src/inc/trpc.h b/src/inc/trpc.h
index 30e0f9eee1889e8b832812fcc3f17f81c157724e..d1adfb7494aafb89912c508c65ab9a774fae4f09 100644
--- a/src/inc/trpc.h
+++ b/src/inc/trpc.h
@@ -47,8 +47,8 @@ typedef struct SRpcMsg {
   void   *pCont;
   int     contLen;
   int32_t code;
-  void   *handle;
-  void   *ahandle;  //app handle set by client, for debug purpose
+  void   *handle;   // rpc handle returned to app
+  void   *ahandle;  // app handle set by client
 } SRpcMsg;
 
 typedef struct SRpcInit {
@@ -78,11 +78,11 @@ void  rpcClose(void *);
 void *rpcMallocCont(int contLen);
 void  rpcFreeCont(void *pCont);
 void *rpcReallocCont(void *ptr, int contLen);
-void *rpcSendRequest(void *thandle, const SRpcIpSet *pIpSet, const SRpcMsg *pMsg);
+void  rpcSendRequest(void *thandle, const SRpcIpSet *pIpSet, SRpcMsg *pMsg);
 void  rpcSendResponse(const SRpcMsg *pMsg);
 void  rpcSendRedirectRsp(void *pConn, const SRpcIpSet *pIpSet); 
 int   rpcGetConnInfo(void *thandle, SRpcConnInfo *pInfo);
-void  rpcSendRecv(void *shandle, SRpcIpSet *pIpSet, const SRpcMsg *pReq, SRpcMsg *pRsp);
+void  rpcSendRecv(void *shandle, SRpcIpSet *pIpSet, SRpcMsg *pReq, SRpcMsg *pRsp);
 int   rpcReportProgress(void *pConn, char *pCont, int contLen);
 void  rpcCancelRequest(void *pContext);
 
diff --git a/src/mnode/src/mnodeDnode.c b/src/mnode/src/mnodeDnode.c
index dbe9185d8e97ba33a07e1f98d865bd156ea4dd53..7e7c12cf088c823137350eb476af79df128139e2 100644
--- a/src/mnode/src/mnodeDnode.c
+++ b/src/mnode/src/mnodeDnode.c
@@ -264,7 +264,7 @@ static int32_t mnodeProcessCfgDnodeMsg(SMnodeMsg *pMsg) {
   strcpy(pMdCfgDnode->config, pCmCfgDnode->config);
 
   SRpcMsg rpcMdCfgDnodeMsg = {
-    .handle = 0,
+    .ahandle = 0,
     .code = 0,
     .msgType = TSDB_MSG_TYPE_MD_CONFIG_DNODE,
     .pCont = pMdCfgDnode,
diff --git a/src/mnode/src/mnodeTable.c b/src/mnode/src/mnodeTable.c
index c7f8791d6de658fc21187de849945182f44840be..47add8f7a3184d517ce3b77317324ebe916b7185 100644
--- a/src/mnode/src/mnodeTable.c
+++ b/src/mnode/src/mnodeTable.c
@@ -1574,7 +1574,7 @@ static int32_t mnodeDoCreateChildTableCb(SMnodeMsg *pMsg, int32_t code) {
 
   SRpcIpSet ipSet = mnodeGetIpSetFromVgroup(pMsg->pVgroup);
   SRpcMsg rpcMsg = {
-      .handle  = pMsg,
+      .ahandle = pMsg,
       .pCont   = pMDCreate,
       .contLen = htonl(pMDCreate->contLen),
       .code    = 0,
@@ -1751,7 +1751,7 @@ static int32_t mnodeProcessDropChildTableMsg(SMnodeMsg *pMsg) {
 
   mInfo("app:%p:%p, table:%s, send drop ctable msg", pMsg->rpcMsg.ahandle, pMsg, pDrop->tableId);
   SRpcMsg rpcMsg = {
-    .handle  = pMsg,
+    .ahandle = pMsg,
     .pCont   = pDrop,
     .contLen = sizeof(SMDDropTableMsg),
     .code    = 0,
@@ -1799,7 +1799,7 @@ static int32_t mnodeAlterNormalTableColumnCb(SMnodeMsg *pMsg, int32_t code) {
 
   SRpcIpSet ipSet = mnodeGetIpSetFromVgroup(pMsg->pVgroup);
   SRpcMsg rpcMsg = {
-      .handle  = pMsg,
+      .ahandle = pMsg,
       .pCont   = pMDCreate,
       .contLen = htonl(pMDCreate->contLen),
       .code    = 0,
@@ -2144,9 +2144,9 @@ static int32_t mnodeProcessTableCfgMsg(SMnodeMsg *pMsg) {
 
 // handle drop child response
 static void mnodeProcessDropChildTableRsp(SRpcMsg *rpcMsg) {
-  if (rpcMsg->handle == NULL) return;
+  if (rpcMsg->ahandle == NULL) return;
 
-  SMnodeMsg *mnodeMsg = rpcMsg->handle;
+  SMnodeMsg *mnodeMsg = rpcMsg->ahandle;
   mnodeMsg->received++;
 
   SChildTableObj *pTable = (SChildTableObj *)mnodeMsg->pTable;
@@ -2195,9 +2195,9 @@ static void mnodeProcessDropChildTableRsp(SRpcMsg *rpcMsg) {
  *   if failed, drop the table cached
  */
 static void mnodeProcessCreateChildTableRsp(SRpcMsg *rpcMsg) {
-  if (rpcMsg->handle == NULL) return;
+  if (rpcMsg->ahandle == NULL) return;
 
-  SMnodeMsg *mnodeMsg = rpcMsg->handle;
+  SMnodeMsg *mnodeMsg = rpcMsg->ahandle;
   mnodeMsg->received++;
 
   SChildTableObj *pTable = (SChildTableObj *)mnodeMsg->pTable;
@@ -2238,9 +2238,9 @@ static void mnodeProcessCreateChildTableRsp(SRpcMsg *rpcMsg) {
 }
 
 static void mnodeProcessAlterTableRsp(SRpcMsg *rpcMsg) {
-  if (rpcMsg->handle == NULL) return;
+  if (rpcMsg->ahandle == NULL) return;
 
-  SMnodeMsg *mnodeMsg = rpcMsg->handle;
+  SMnodeMsg *mnodeMsg = rpcMsg->ahandle;
   mnodeMsg->received++;
 
   SChildTableObj *pTable = (SChildTableObj *)mnodeMsg->pTable;
diff --git a/src/mnode/src/mnodeVgroup.c b/src/mnode/src/mnodeVgroup.c
index b314bfc8d03689842e33bdbbe9f5197a3bd9f6ca..3855de41014deb0fe33ba09913cf13a62212f9ec 100644
--- a/src/mnode/src/mnodeVgroup.c
+++ b/src/mnode/src/mnodeVgroup.c
@@ -652,7 +652,7 @@ SRpcIpSet mnodeGetIpSetFromIp(char *ep) {
 void mnodeSendCreateVnodeMsg(SVgObj *pVgroup, SRpcIpSet *ipSet, void *ahandle) {
   SMDCreateVnodeMsg *pCreate = mnodeBuildCreateVnodeMsg(pVgroup);
   SRpcMsg rpcMsg = {
-    .handle  = ahandle,
+    .ahandle = ahandle,
     .pCont   = pCreate,
     .contLen = pCreate ? sizeof(SMDCreateVnodeMsg) : 0,
     .code    = 0,
@@ -673,9 +673,9 @@ void mnodeSendCreateVgroupMsg(SVgObj *pVgroup, void *ahandle) {
 }
 
 static void mnodeProcessCreateVnodeRsp(SRpcMsg *rpcMsg) {
-  if (rpcMsg->handle == NULL) return;
+  if (rpcMsg->ahandle == NULL) return;
 
-  SMnodeMsg *mnodeMsg = rpcMsg->handle;
+  SMnodeMsg *mnodeMsg = rpcMsg->ahandle;
   mnodeMsg->received++;
   if (rpcMsg->code == TSDB_CODE_SUCCESS) {
     mnodeMsg->successed++;
@@ -686,7 +686,7 @@ static void mnodeProcessCreateVnodeRsp(SRpcMsg *rpcMsg) {
   SVgObj *pVgroup = mnodeMsg->pVgroup;
   mDebug("vgId:%d, create vnode rsp received, result:%s received:%d successed:%d expected:%d, thandle:%p ahandle:%p",
          pVgroup->vgId, tstrerror(rpcMsg->code), mnodeMsg->received, mnodeMsg->successed, mnodeMsg->expected,
-         mnodeMsg->rpcMsg.handle, rpcMsg->handle);
+         mnodeMsg->rpcMsg.handle, rpcMsg->ahandle);
 
   if (mnodeMsg->received != mnodeMsg->expected) return;
 
@@ -718,7 +718,7 @@ static SMDDropVnodeMsg *mnodeBuildDropVnodeMsg(int32_t vgId) {
 void mnodeSendDropVnodeMsg(int32_t vgId, SRpcIpSet *ipSet, void *ahandle) {
   SMDDropVnodeMsg *pDrop = mnodeBuildDropVnodeMsg(vgId);
   SRpcMsg rpcMsg = {
-      .handle  = ahandle,
+      .ahandle = ahandle,
       .pCont   = pDrop,
       .contLen = pDrop ? sizeof(SMDDropVnodeMsg) : 0,
       .code    = 0,
@@ -737,10 +737,10 @@ static void mnodeSendDropVgroupMsg(SVgObj *pVgroup, void *ahandle) {
 }
 
 static void mnodeProcessDropVnodeRsp(SRpcMsg *rpcMsg) {
-  mDebug("drop vnode rsp is received, handle:%p", rpcMsg->handle);
-  if (rpcMsg->handle == NULL) return;
+  mDebug("drop vnode rsp is received, handle:%p", rpcMsg->ahandle);
+  if (rpcMsg->ahandle == NULL) return;
 
-  SMnodeMsg *mnodeMsg = rpcMsg->handle;
+  SMnodeMsg *mnodeMsg = rpcMsg->ahandle;
   mnodeMsg->received++;
   if (rpcMsg->code == TSDB_CODE_SUCCESS) {
     mnodeMsg->code = rpcMsg->code;
@@ -750,7 +750,7 @@ static void mnodeProcessDropVnodeRsp(SRpcMsg *rpcMsg) {
   SVgObj *pVgroup = mnodeMsg->pVgroup;
   mDebug("vgId:%d, drop vnode rsp received, result:%s received:%d successed:%d expected:%d, thandle:%p ahandle:%p",
          pVgroup->vgId, tstrerror(rpcMsg->code), mnodeMsg->received, mnodeMsg->successed, mnodeMsg->expected,
-         mnodeMsg->rpcMsg.handle, rpcMsg->handle);
+         mnodeMsg->rpcMsg.handle, rpcMsg->ahandle);
 
   if (mnodeMsg->received != mnodeMsg->expected) return;
 
diff --git a/src/rpc/src/rpcMain.c b/src/rpc/src/rpcMain.c
index a59024f8db6fc541e1af8a85bd26f6305d024f40..3a9397502251e308069ecb65699fb5383c550432 100644
--- a/src/rpc/src/rpcMain.c
+++ b/src/rpc/src/rpcMain.c
@@ -354,13 +354,13 @@ void *rpcReallocCont(void *ptr, int contLen) {
   return start + sizeof(SRpcReqContext) + sizeof(SRpcHead);
 }
 
-void *rpcSendRequest(void *shandle, const SRpcIpSet *pIpSet, const SRpcMsg *pMsg) {
+void rpcSendRequest(void *shandle, const SRpcIpSet *pIpSet, SRpcMsg *pMsg) {
   SRpcInfo       *pRpc = (SRpcInfo *)shandle;
   SRpcReqContext *pContext;
 
   int contLen = rpcCompressRpcMsg(pMsg->pCont, pMsg->contLen);
   pContext = (SRpcReqContext *) (pMsg->pCont-sizeof(SRpcHead)-sizeof(SRpcReqContext));
-  pContext->ahandle = pMsg->handle;
+  pContext->ahandle = pMsg->ahandle;
   pContext->pRpc = (SRpcInfo *)shandle;
   pContext->ipSet = *pIpSet;
   pContext->contLen = contLen;
@@ -380,9 +380,12 @@ void *rpcSendRequest(void *shandle, const SRpcIpSet *pIpSet, const SRpcMsg *pMsg
     || type == TSDB_MSG_TYPE_CM_SHOW )
     pContext->connType = RPC_CONN_TCPC;
   
+  // set the handle to pContext, so app can cancel the request
+  if (pMsg->handle) *((void **)pMsg->handle) = pContext;
+
   rpcSendReqToServer(pRpc, pContext);
 
-  return pContext;
+  return;
 }
 
 void rpcSendResponse(const SRpcMsg *pRsp) {
@@ -483,7 +486,7 @@ int rpcGetConnInfo(void *thandle, SRpcConnInfo *pInfo) {
   return 0;
 }
 
-void rpcSendRecv(void *shandle, SRpcIpSet *pIpSet, const SRpcMsg *pMsg, SRpcMsg *pRsp) {
+void rpcSendRecv(void *shandle, SRpcIpSet *pIpSet, SRpcMsg *pMsg, SRpcMsg *pRsp) {
   SRpcReqContext *pContext;
   pContext = (SRpcReqContext *) (pMsg->pCont-sizeof(SRpcHead)-sizeof(SRpcReqContext));
 
@@ -1051,7 +1054,7 @@ static void rpcProcessIncomingMsg(SRpcConn *pConn, SRpcHead *pHead) {
   } else {
     // it's a response
     SRpcReqContext *pContext = pConn->pContext;
-    rpcMsg.handle = pContext->ahandle;
+    rpcMsg.handle = pContext;
     pConn->pContext = NULL;
 
     // for UDP, port may be changed by server, the port in ipSet shall be used for cache
@@ -1255,7 +1258,7 @@ static void rpcProcessConnError(void *param, void *id) {
 
   if (pContext->numOfTry >= pContext->ipSet.numOfIps) {
     rpcMsg.msgType = pContext->msgType+1;
-    rpcMsg.handle = pContext->ahandle;
+    rpcMsg.ahandle = pContext->ahandle;
     rpcMsg.code = pContext->code;
     rpcMsg.pCont = NULL;
     rpcMsg.contLen = 0;
diff --git a/src/rpc/test/rclient.c b/src/rpc/test/rclient.c
index 1bc64b0825fa2afa8752251b015b6819ecdb52b1..e51b54e299e517914adc2cb879b701ac2a0f71f2 100644
--- a/src/rpc/test/rclient.c
+++ b/src/rpc/test/rclient.c
@@ -33,7 +33,7 @@ typedef struct {
 } SInfo;
 
 static void processResponse(SRpcMsg *pMsg, SRpcIpSet *pIpSet) {
-  SInfo *pInfo = (SInfo *)pMsg->handle;
+  SInfo *pInfo = (SInfo *)pMsg->ahandle;
   tDebug("thread:%d, response is received, type:%d contLen:%d code:0x%x", pInfo->index, pMsg->msgType, pMsg->contLen, pMsg->code);
 
   if (pIpSet) pInfo->ipSet = *pIpSet;
@@ -46,7 +46,7 @@ static int tcount = 0;
 
 static void *sendRequest(void *param) {
   SInfo  *pInfo = (SInfo *)param;
-  SRpcMsg rpcMsg; 
+  SRpcMsg rpcMsg = {0}; 
   
   tDebug("thread:%d, start to send request", pInfo->index);
 
@@ -54,7 +54,7 @@ static void *sendRequest(void *param) {
     pInfo->num++;
     rpcMsg.pCont = rpcMallocCont(pInfo->msgSize);
     rpcMsg.contLen = pInfo->msgSize;
-    rpcMsg.handle = pInfo;
+    rpcMsg.ahandle = pInfo;
     rpcMsg.msgType = 1;
     tDebug("thread:%d, send request, contLen:%d num:%d", pInfo->index, pInfo->msgSize, pInfo->num);
     rpcSendRequest(pInfo->pRpc, &pInfo->ipSet, &rpcMsg);
diff --git a/tests/pytest/query/queryMetaData.py b/tests/pytest/query/queryMetaData.py
index 01c63c3f4a2702f19ccfd19d60dfebbc03671f7a..8fb9d9bf3a7a1648607f7943ac807a2ed69d8222 100755
--- a/tests/pytest/query/queryMetaData.py
+++ b/tests/pytest/query/queryMetaData.py
@@ -58,7 +58,7 @@ class MetadataQuery:
         cursor.execute("use test")
         base = threadID * self.tables
 
-        tablesPerThread = (int) self.tables / self.numOfTherads
+        tablesPerThread = int (self.tables / self.numOfTherads)
         for i in range(tablesPerThread):
             cursor.execute(
                 '''create table t%d using meters tags(