diff --git a/include/libs/executor/executor.h b/include/libs/executor/executor.h
index e0fce2aa6a..162b6fb2ed 100644
--- a/include/libs/executor/executor.h
+++ b/include/libs/executor/executor.h
@@ -22,6 +22,7 @@ extern "C" {
 
 #include "query.h"
 #include "tcommon.h"
+#include "tmsgcb.h"
 
 typedef void* qTaskInfo_t;
 typedef void* DataSinkHandle;
@@ -29,11 +30,12 @@ struct SRpcMsg;
 struct SSubplan;
 
 typedef struct SReadHandle {
-  void* reader;
-  void* meta;
-  void* config;
-  void* vnode;
-  void* mnd;
+  void*   reader;
+  void*   meta;
+  void*   config;
+  void*   vnode;
+  void*   mnd;
+  SMsgCb* pMsgCb;
 } SReadHandle;
 
 #define STREAM_DATA_TYPE_SUBMIT_BLOCK 0x1
diff --git a/include/libs/qcom/query.h b/include/libs/qcom/query.h
index c1e53fa805..d606821bae 100644
--- a/include/libs/qcom/query.h
+++ b/include/libs/qcom/query.h
@@ -24,6 +24,7 @@ extern "C" {
 #include "thash.h"
 #include "tlog.h"
 #include "tmsg.h"
+#include "tmsgcb.h"
 
 typedef enum {
   JOB_TASK_STATUS_NULL = 0,
@@ -149,7 +150,7 @@ int32_t cleanupTaskQueue();
  */
 int32_t taosAsyncExec(__async_exec_fn_t execFn, void* execParam, int32_t* code);
 
-int32_t asyncSendMsgToServerExt(void* pTransporter, SEpSet* epSet, int64_t* pTransporterId, const SMsgSendInfo* pInfo, bool persistHandle, void *ctx);
+int32_t asyncSendMsgToServerExt(SMsgCb *pMsgCb, void* pTransporter, SEpSet* epSet, int64_t* pTransporterId, const SMsgSendInfo* pInfo, bool persistHandle, void *ctx);
 
 /**
  * Asynchronously send message to server, after the response received, the callback will be incured.
@@ -160,7 +161,7 @@ int32_t asyncSendMsgToServerExt(void* pTransporter, SEpSet* epSet, int64_t* pTra
  * @param pInfo
  * @return
  */
-int32_t asyncSendMsgToServer(void* pTransporter, SEpSet* epSet, int64_t* pTransporterId, const SMsgSendInfo* pInfo);
+int32_t asyncSendMsgToServer(SMsgCb *pMsgCb, void* pTransporter, SEpSet* epSet, int64_t* pTransporterId, const SMsgSendInfo* pInfo);
 
 int32_t queryBuildUseDbOutput(SUseDbOutput* pOut, SUseDbRsp* usedbRsp);
 
diff --git a/source/client/src/clientHb.c b/source/client/src/clientHb.c
index fc39e80c1e..1e4ab0bfcb 100644
--- a/source/client/src/clientHb.c
+++ b/source/client/src/clientHb.c
@@ -621,7 +621,7 @@ static void *hbThreadFunc(void *param) {
       SAppInstInfo *pAppInstInfo = pAppHbMgr->pAppInstInfo;
       int64_t       transporterId = 0;
       SEpSet        epSet = getEpSet_s(&pAppInstInfo->mgmtEp);
-      asyncSendMsgToServer(pAppInstInfo->pTransporter, &epSet, &transporterId, pInfo);
+      asyncSendMsgToServer(NULL, pAppInstInfo->pTransporter, &epSet, &transporterId, pInfo);
       tFreeClientHbBatchReq(pReq, false);
       hbClearReqInfo(pAppHbMgr);
 
diff --git a/source/client/src/clientImpl.c b/source/client/src/clientImpl.c
index 427cd72c0f..6c6f5695e1 100644
--- a/source/client/src/clientImpl.c
+++ b/source/client/src/clientImpl.c
@@ -219,7 +219,7 @@ int32_t execDdlQuery(SRequestObj* pRequest, SQuery* pQuery) {
   SMsgSendInfo* pSendMsg = buildMsgInfoImpl(pRequest);
 
   int64_t transporterId = 0;
-  asyncSendMsgToServer(pTscObj->pAppInfo->pTransporter, &pMsgInfo->epSet, &transporterId, pSendMsg);
+  asyncSendMsgToServer(NULL, pTscObj->pAppInfo->pTransporter, &pMsgInfo->epSet, &transporterId, pSendMsg);
 
   tsem_wait(&pRequest->body.rspSem);
   return TSDB_CODE_SUCCESS;
@@ -504,7 +504,7 @@ STscObj* taosConnectImpl(const char* user, const char* auth, const char* db, __t
   SMsgSendInfo* body = buildConnectMsg(pRequest, connType);
 
   int64_t transporterId = 0;
-  asyncSendMsgToServer(pTscObj->pAppInfo->pTransporter, &pTscObj->pAppInfo->mgmtEp.epSet, &transporterId, body);
+  asyncSendMsgToServer(NULL, pTscObj->pAppInfo->pTransporter, &pTscObj->pAppInfo->mgmtEp.epSet, &transporterId, body);
 
   tsem_wait(&pRequest->body.rspSem);
   if (pRequest->code != TSDB_CODE_SUCCESS) {
diff --git a/source/client/src/tmq.c b/source/client/src/tmq.c
index 698c0cc4e7..b88335267e 100644
--- a/source/client/src/tmq.c
+++ b/source/client/src/tmq.c
@@ -589,7 +589,7 @@ tmq_resp_err_t tmq_commit(tmq_t* tmq, const tmq_topic_vgroup_list_t* offsets, in
   SEpSet epSet = getEpSet_s(&tmq->pTscObj->pAppInfo->mgmtEp);
 
   int64_t transporterId = 0;
-  asyncSendMsgToServer(tmq->pTscObj->pAppInfo->pTransporter, &epSet, &transporterId, sendInfo);
+  asyncSendMsgToServer(NULL, tmq->pTscObj->pAppInfo->pTransporter, &epSet, &transporterId, sendInfo);
 
   if (!async) {
     tsem_wait(&pParam->rspSem);
@@ -666,7 +666,7 @@ tmq_resp_err_t tmq_subscribe(tmq_t* tmq, const tmq_list_t* topic_list) {
   SEpSet epSet = getEpSet_s(&tmq->pTscObj->pAppInfo->mgmtEp);
 
   int64_t transporterId = 0;
-  asyncSendMsgToServer(tmq->pTscObj->pAppInfo->pTransporter, &epSet, &transporterId, sendInfo);
+  asyncSendMsgToServer(NULL, tmq->pTscObj->pAppInfo->pTransporter, &epSet, &transporterId, sendInfo);
 
   // avoid double free if msg is sent
   buf = NULL;
@@ -773,7 +773,7 @@ TAOS_RES* tmq_create_stream(TAOS* taos, const char* streamName, const char* tbNa
   SEpSet        epSet = getEpSet_s(&pTscObj->pAppInfo->mgmtEp);
 
   int64_t transporterId = 0;
-  asyncSendMsgToServer(pTscObj->pAppInfo->pTransporter, &epSet, &transporterId, sendInfo);
+  asyncSendMsgToServer(NULL, pTscObj->pAppInfo->pTransporter, &epSet, &transporterId, sendInfo);
 
   tsem_wait(&pRequest->body.rspSem);
 
@@ -1046,7 +1046,7 @@ int32_t tmqAskEp(tmq_t* tmq, bool async) {
   tscDebug("consumer %ld ask ep", tmq->consumerId);
 
   int64_t transporterId = 0;
-  asyncSendMsgToServer(tmq->pTscObj->pAppInfo->pTransporter, &epSet, &transporterId, sendInfo);
+  asyncSendMsgToServer(NULL, tmq->pTscObj->pAppInfo->pTransporter, &epSet, &transporterId, sendInfo);
 
   if (!async) {
     tsem_wait(&pParam->rspSem);
@@ -1198,7 +1198,7 @@ int32_t tmqPollImpl(tmq_t* tmq, int64_t waitTime) {
       tscDebug("consumer %ld send poll to %s : vg %d, epoch %d, req offset %ld, reqId %lu", tmq->consumerId,
                pTopic->topicName, pVg->vgId, tmq->epoch, pVg->currentOffset, pReq->reqId);
       /*printf("send vg %d %ld\n", pVg->vgId, pVg->currentOffset);*/
-      asyncSendMsgToServer(tmq->pTscObj->pAppInfo->pTransporter, &pVg->epSet, &transporterId, sendInfo);
+      asyncSendMsgToServer(NULL, tmq->pTscObj->pAppInfo->pTransporter, &pVg->epSet, &transporterId, sendInfo);
       pVg->pollCnt++;
       tmq->pollCnt++;
     }
diff --git a/source/dnode/mgmt/mgmt_mnode/src/mmHandle.c b/source/dnode/mgmt/mgmt_mnode/src/mmHandle.c
index ed9384a869..a0f523fbae 100644
--- a/source/dnode/mgmt/mgmt_mnode/src/mmHandle.c
+++ b/source/dnode/mgmt/mgmt_mnode/src/mmHandle.c
@@ -201,6 +201,7 @@ void mmInitMsgHandle(SMgmtWrapper *pWrapper) {
   dmSetMsgHandle(pWrapper, TDMT_MND_KILL_CONN, mmProcessWriteMsg, DEFAULT_HANDLE);
   dmSetMsgHandle(pWrapper, TDMT_MND_HEARTBEAT, mmProcessWriteMsg, DEFAULT_HANDLE);
   dmSetMsgHandle(pWrapper, TDMT_MND_SYSTABLE_RETRIEVE, mmProcessReadMsg, DEFAULT_HANDLE);
+  dmSetMsgHandle(pWrapper, TDMT_MND_SYSTABLE_RETRIEVE_RSP, mmProcessReadMsg, DEFAULT_HANDLE);
   dmSetMsgHandle(pWrapper, TDMT_MND_STATUS, mmProcessReadMsg, DEFAULT_HANDLE);
   dmSetMsgHandle(pWrapper, TDMT_MND_KILL_TRANS, mmProcessWriteMsg, DEFAULT_HANDLE);
   dmSetMsgHandle(pWrapper, TDMT_MND_GRANT, mmProcessWriteMsg, DEFAULT_HANDLE);
diff --git a/source/dnode/mgmt/mgmt_vnode/src/vmHandle.c b/source/dnode/mgmt/mgmt_vnode/src/vmHandle.c
index 9329e7b15d..d3003b59c4 100644
--- a/source/dnode/mgmt/mgmt_vnode/src/vmHandle.c
+++ b/source/dnode/mgmt/mgmt_vnode/src/vmHandle.c
@@ -262,7 +262,7 @@ void vmInitMsgHandle(SMgmtWrapper *pWrapper) {
   dmSetMsgHandle(pWrapper, TDMT_VND_QUERY, vmProcessQueryMsg, DEFAULT_HANDLE);
   dmSetMsgHandle(pWrapper, TDMT_VND_QUERY_CONTINUE, vmProcessQueryMsg, DEFAULT_HANDLE);
   dmSetMsgHandle(pWrapper, TDMT_VND_FETCH, vmProcessFetchMsg, DEFAULT_HANDLE);
-  dmSetMsgHandle(pWrapper, TDMT_VND_FETCH_RSP, vmProcessFetchMsg, DEFAULT_HANDLE);
+  dmSetMsgHandle(pWrapper, TDMT_VND_FETCH_RSP, vmProcessMgmtMsg, DEFAULT_HANDLE);
   dmSetMsgHandle(pWrapper, TDMT_VND_ALTER_TABLE, vmProcessWriteMsg, DEFAULT_HANDLE);
   dmSetMsgHandle(pWrapper, TDMT_VND_UPDATE_TAG_VAL, vmProcessWriteMsg, DEFAULT_HANDLE);
   dmSetMsgHandle(pWrapper, TDMT_VND_TABLE_META, vmProcessFetchMsg, DEFAULT_HANDLE);
diff --git a/source/dnode/mgmt/mgmt_vnode/src/vmWorker.c b/source/dnode/mgmt/mgmt_vnode/src/vmWorker.c
index f3d7253e71..1858359078 100644
--- a/source/dnode/mgmt/mgmt_vnode/src/vmWorker.c
+++ b/source/dnode/mgmt/mgmt_vnode/src/vmWorker.c
@@ -17,6 +17,7 @@
 
 #include "vmInt.h"
 
+#include "qworker.h"
 #include "sync.h"
 #include "syncTools.h"
 
@@ -50,6 +51,11 @@ static void vmProcessMgmtQueue(SQueueInfo *pInfo, SNodeMsg *pMsg) {
     case TDMT_DND_DROP_VNODE:
       code = vmProcessDropVnodeReq(pMgmt, pMsg);
       break;
+    case TDMT_VND_FETCH_RSP:
+      // todo refactor
+      code = qWorkerProcessFetchRsp(NULL, NULL, &pMsg->rpcMsg);
+      pMsg->rpcMsg.pCont = NULL;  // already freed in qworker
+      break;
     default:
       terrno = TSDB_CODE_MSG_NOT_PROCESSED;
       dError("msg:%p, not processed in vnode-mgmt queue", pMsg);
diff --git a/source/dnode/mnode/impl/src/mndQuery.c b/source/dnode/mnode/impl/src/mndQuery.c
index 7aa55e2109..36cde396fa 100644
--- a/source/dnode/mnode/impl/src/mndQuery.c
+++ b/source/dnode/mnode/impl/src/mndQuery.c
@@ -20,7 +20,7 @@
 
 int32_t mndProcessQueryMsg(SNodeMsg *pReq) {
   SMnode     *pMnode = pReq->pNode;
-  SReadHandle handle = {.mnd = pMnode};
+  SReadHandle handle = {.mnd = pMnode, .pMsgCb = &pMnode->msgCb};
 
   mTrace("msg:%p, in query queue is processing", pReq);
   switch (pReq->rpcMsg.msgType) {
diff --git a/source/dnode/mnode/impl/src/mndShow.c b/source/dnode/mnode/impl/src/mndShow.c
index be333d154a..185e2443ce 100644
--- a/source/dnode/mnode/impl/src/mndShow.c
+++ b/source/dnode/mnode/impl/src/mndShow.c
@@ -16,6 +16,7 @@
 #define _DEFAULT_SOURCE
 #include "mndShow.h"
 #include "systable.h"
+#include "qworker.h"
 
 #define SHOW_STEP_SIZE 100
 
@@ -25,6 +26,7 @@ static SShowObj *mndAcquireShowObj(SMnode *pMnode, int64_t showId);
 static void      mndReleaseShowObj(SShowObj *pShow, bool forceRemove);
 static bool      mndCheckRetrieveFinished(SShowObj *pShow);
 static int32_t   mndProcessRetrieveSysTableReq(SNodeMsg *pReq);
+static int32_t   mndProcessRetrieveSysTableRsp(SNodeMsg *pRsp);
 
 int32_t mndInitShow(SMnode *pMnode) {
   SShowMgmt *pMgmt = &pMnode->showMgmt;
@@ -37,6 +39,7 @@ int32_t mndInitShow(SMnode *pMnode) {
   }
 
   mndSetMsgHandle(pMnode, TDMT_MND_SYSTABLE_RETRIEVE, mndProcessRetrieveSysTableReq);
+  mndSetMsgHandle(pMnode, TDMT_MND_SYSTABLE_RETRIEVE_RSP, mndProcessRetrieveSysTableRsp);
   return 0;
 }
 
@@ -175,6 +178,13 @@ static void mndReleaseShowObj(SShowObj *pShow, bool forceRemove) {
   taosCacheRelease(pMgmt->cache, (void **)(&pShow), forceRemove);
 }
 
+static int32_t mndProcessRetrieveSysTableRsp(SNodeMsg *pRsp) {
+  mTrace("mnode-systable-retrieve-rsp is received");
+  qWorkerProcessFetchRsp(NULL, NULL, &pRsp->rpcMsg);
+  pRsp->rpcMsg.pCont = NULL;  // already freed in qworker
+  return 0;
+}
+
 static int32_t mndProcessRetrieveSysTableReq(SNodeMsg *pReq) {
   SMnode    *pMnode = pReq->pNode;
   SShowMgmt *pMgmt = &pMnode->showMgmt;
diff --git a/source/dnode/qnode/src/qnode.c b/source/dnode/qnode/src/qnode.c
index b21141001a..54b29f546c 100644
--- a/source/dnode/qnode/src/qnode.c
+++ b/source/dnode/qnode/src/qnode.c
@@ -51,7 +51,7 @@ int32_t qndGetLoad(SQnode *pQnode, SQnodeLoad *pLoad) { return 0; }
 
 int32_t qndProcessQueryMsg(SQnode *pQnode, SRpcMsg *pMsg) {
   qTrace("message in qnode query queue is processing");
-  SReadHandle handle = {0};
+  SReadHandle handle = {.pMsgCb = &pQnode->msgCb};
 
   switch (pMsg->msgType) {
     case TDMT_VND_QUERY: {
diff --git a/source/dnode/vnode/src/inc/vnodeInt.h b/source/dnode/vnode/src/inc/vnodeInt.h
index 3724a98a5e..5c7dddd98f 100644
--- a/source/dnode/vnode/src/inc/vnodeInt.h
+++ b/source/dnode/vnode/src/inc/vnodeInt.h
@@ -34,6 +34,7 @@
 #include "tlockfree.h"
 #include "tlosertree.h"
 #include "tmallocator.h"
+#include "tmsgcb.h"
 #include "tskiplist.h"
 #include "tstream.h"
 #include "ttime.h"
@@ -120,7 +121,7 @@ int32_t tqProcessPollReq(STQ* pTq, SRpcMsg* pMsg, int32_t workerId);
 
 // sma
 
-int32_t tsdbRegisterRSma(STsdb* pTsdb, SMeta* pMeta, SVCreateStbReq* pReq);
+int32_t tsdbRegisterRSma(STsdb* pTsdb, SMeta* pMeta, SVCreateStbReq* pReq, SMsgCb* pMsgCb);
 int32_t tsdbFetchTbUidList(STsdb* pTsdb, STbUidStore** ppStore, tb_uid_t suid, tb_uid_t uid);
 int32_t tsdbUpdateTbUidList(STsdb* pTsdb, STbUidStore* pUidStore);
 void    tsdbUidStoreDestory(STbUidStore* pStore);
diff --git a/source/dnode/vnode/src/tq/tq.c b/source/dnode/vnode/src/tq/tq.c
index ffd76af5e2..147e106085 100644
--- a/source/dnode/vnode/src/tq/tq.c
+++ b/source/dnode/vnode/src/tq/tq.c
@@ -378,6 +378,7 @@ int32_t tqDeserializeConsumer(STQ* pTq, const STqSerializedHead* pHead, STqConsu
       SReadHandle    handle = {
              .reader = pReadHandle,
              .meta = pTq->pVnode->pMeta,
+             .pMsgCb = &pTq->pVnode->msgCb,
       };
       pTopic->buffer.output[j].pReadHandle = pReadHandle;
       pTopic->buffer.output[j].task = qCreateStreamExecTaskInfo(pTopic->qmsg, &handle);
@@ -857,6 +858,7 @@ int32_t tqProcessVgChangeReq(STQ* pTq, char* msg, int32_t msgLen) {
         SReadHandle handle = {
             .reader = pExec->pExecReader[i],
             .meta = pTq->pVnode->pMeta,
+            .pMsgCb = &pTq->pVnode->msgCb,
         };
         pExec->task[i] = qCreateStreamExecTaskInfo(pExec->qmsg, &handle);
         ASSERT(pExec->task[i]);
@@ -897,6 +899,7 @@ int32_t tqExpandTask(STQ* pTq, SStreamTask* pTask, int32_t parallel) {
     SReadHandle    handle = {
            .reader = pStreamReader,
            .meta = pTq->pVnode->pMeta,
+           .pMsgCb = &pTq->pVnode->msgCb,
     };
     pTask->exec.runners[i].inputHandle = pStreamReader;
     pTask->exec.runners[i].executor = qCreateStreamExecTaskInfo(pTask->exec.qmsg, &handle);
diff --git a/source/dnode/vnode/src/tsdb/tsdbSma.c b/source/dnode/vnode/src/tsdb/tsdbSma.c
index 856481bc5f..6d396e6438 100644
--- a/source/dnode/vnode/src/tsdb/tsdbSma.c
+++ b/source/dnode/vnode/src/tsdb/tsdbSma.c
@@ -1698,7 +1698,7 @@ int32_t tsdbDropTSma(STsdb *pTsdb, char *pMsg) {
  * @param pReq
  * @return int32_t
  */
-int32_t tsdbRegisterRSma(STsdb *pTsdb, SMeta *pMeta, SVCreateStbReq *pReq) {
+int32_t tsdbRegisterRSma(STsdb *pTsdb, SMeta *pMeta, SVCreateStbReq *pReq, SMsgCb *pMsgCb) {
   if (!pReq->rollup) {
     tsdbDebug("vgId:%d return directly since no rollup for stable %s %" PRIi64, REPO_ID(pTsdb), pReq->name, pReq->suid);
     return TSDB_CODE_SUCCESS;
@@ -1742,6 +1742,7 @@ int32_t tsdbRegisterRSma(STsdb *pTsdb, SMeta *pMeta, SVCreateStbReq *pReq) {
   SReadHandle handle = {
       .reader = pReadHandle,
       .meta = pMeta,
+      .pMsgCb = pMsgCb,
   };
 
   if (param->qmsg1) {
diff --git a/source/dnode/vnode/src/vnd/vnodeSvr.c b/source/dnode/vnode/src/vnd/vnodeSvr.c
index 403c02b440..0603656080 100644
--- a/source/dnode/vnode/src/vnd/vnodeSvr.c
+++ b/source/dnode/vnode/src/vnd/vnodeSvr.c
@@ -142,9 +142,9 @@ _err:
 int vnodeProcessQueryMsg(SVnode *pVnode, SRpcMsg *pMsg) {
   vTrace("message in vnode query queue is processing");
 #if 0
-  SReadHandle handle = {.reader = pVnode->pTsdb, .meta = pVnode->pMeta, .config = &pVnode->config, .vnode = pVnode};
+  SReadHandle handle = {.reader = pVnode->pTsdb, .meta = pVnode->pMeta, .config = &pVnode->config, .vnode = pVnode, .pMsgCb = &pVnode->msgCb};
 #endif
-  SReadHandle handle = {.meta = pVnode->pMeta, .config = &pVnode->config, .vnode = pVnode};
+  SReadHandle handle = {.meta = pVnode->pMeta, .config = &pVnode->config, .vnode = pVnode, .pMsgCb = &pVnode->msgCb};
   switch (pMsg->msgType) {
     case TDMT_VND_QUERY:
       return qWorkerProcessQueryMsg(&handle, pVnode->pQuery, pMsg);
@@ -306,7 +306,7 @@ static int vnodeProcessCreateStbReq(SVnode *pVnode, int64_t version, void *pReq,
     goto _err;
   }
 
-  tsdbRegisterRSma(pVnode->pTsdb, pVnode->pMeta, &req);
+  tsdbRegisterRSma(pVnode->pTsdb, pVnode->pMeta, &req, &pVnode->msgCb);
 
   tCoderClear(&coder);
   return 0;
diff --git a/source/libs/executor/inc/executorimpl.h b/source/libs/executor/inc/executorimpl.h
index 3ed65f4a05..56311af8b8 100644
--- a/source/libs/executor/inc/executorimpl.h
+++ b/source/libs/executor/inc/executorimpl.h
@@ -320,6 +320,7 @@ typedef struct SExchangeInfo {
   SArray*             pSourceDataInfo;
   tsem_t              ready;
   void*               pTransporter;
+  SMsgCb*             pMsgCb;
   SSDataBlock*        pResult;
   bool                seqLoadData;  // sequential load data or not, false by default
   int32_t             current;
@@ -389,10 +390,7 @@ typedef struct SStreamBlockScanInfo {
 } SStreamBlockScanInfo;
 
 typedef struct SSysTableScanInfo {
-  union {
-    void* pTransporter;
-    SReadHandle readHandle;
-  };
+  SReadHandle readHandle;
 
   SRetrieveMetaTableRsp* pRsp;
   SRetrieveTableReq      req;
@@ -659,7 +657,7 @@ SResultRow* doSetResultOutBufByKey(SDiskbasedBuf* pResultBuf, SResultRowInfo* pR
                                    char* pData, int16_t bytes, bool masterscan, uint64_t groupId,
                                    SExecTaskInfo* pTaskInfo, bool isIntervalQuery, SAggSupporter* pSup);
 
-SOperatorInfo* createExchangeOperatorInfo(const SNodeList* pSources, SSDataBlock* pBlock, SExecTaskInfo* pTaskInfo);
+SOperatorInfo* createExchangeOperatorInfo(SMsgCb *pMsgCb, const SNodeList* pSources, SSDataBlock* pBlock, SExecTaskInfo* pTaskInfo);
 
 SOperatorInfo* createTableScanOperatorInfo(void* pDataReader, SQueryTableDataCond* pCond, int32_t numOfOutput, int32_t dataLoadFlag, const uint8_t* scanInfo,
                                            SArray* pColMatchInfo, SSDataBlock* pResBlock, SNode* pCondition, SInterval* pInterval, double sampleRatio, SExecTaskInfo* pTaskInfo);
diff --git a/source/libs/executor/src/executorimpl.c b/source/libs/executor/src/executorimpl.c
index c0ea54ce4a..f0c137e461 100644
--- a/source/libs/executor/src/executorimpl.c
+++ b/source/libs/executor/src/executorimpl.c
@@ -2810,7 +2810,8 @@ static int32_t doSendFetchDataRequest(SExchangeInfo* pExchangeInfo, SExecTaskInf
   pMsgSendInfo->fp = loadRemoteDataCallback;
 
   int64_t transporterId = 0;
-  int32_t code = asyncSendMsgToServer(pExchangeInfo->pTransporter, &pSource->addr.epSet, &transporterId, pMsgSendInfo);
+  int32_t code = asyncSendMsgToServer(pExchangeInfo->pMsgCb, pExchangeInfo->pTransporter, &pSource->addr.epSet,
+                                      &transporterId, pMsgSendInfo);
   return TSDB_CODE_SUCCESS;
 }
 
@@ -3256,7 +3257,8 @@ static int32_t initDataSource(int32_t numOfSources, SExchangeInfo* pInfo) {
   return TSDB_CODE_SUCCESS;
 }
 
-SOperatorInfo* createExchangeOperatorInfo(const SNodeList* pSources, SSDataBlock* pBlock, SExecTaskInfo* pTaskInfo) {
+SOperatorInfo* createExchangeOperatorInfo(SMsgCb* pMsgCb, const SNodeList* pSources, SSDataBlock* pBlock,
+                                          SExecTaskInfo* pTaskInfo) {
   SExchangeInfo* pInfo = taosMemoryCalloc(1, sizeof(SExchangeInfo));
   SOperatorInfo* pOperator = taosMemoryCalloc(1, sizeof(SOperatorInfo));
 
@@ -3299,29 +3301,7 @@ SOperatorInfo* createExchangeOperatorInfo(const SNodeList* pSources, SSDataBlock
 
   pOperator->fpSet = createOperatorFpSet(prepareLoadRemoteData, doLoadRemoteData, NULL, NULL,
                                          destroyExchangeOperatorInfo, NULL, NULL, NULL);
-
-#if 1
-  {  // todo refactor
-    SRpcInit rpcInit;
-    memset(&rpcInit, 0, sizeof(rpcInit));
-    rpcInit.localPort = 0;
-    rpcInit.label = "EX";
-    rpcInit.numOfThreads = 1;
-    rpcInit.cfp = qProcessFetchRsp;
-    rpcInit.sessions = tsMaxConnections;
-    rpcInit.connType = TAOS_CONN_CLIENT;
-    rpcInit.user = (char*)"root";
-    rpcInit.idleTime = tsShellActivityTimer * 1000;
-    rpcInit.ckey = "key";
-    rpcInit.spi = 1;
-    rpcInit.secret = (char*)"dcc5bed04851fec854c035b2e40263b6";
-
-    pInfo->pTransporter = rpcOpen(&rpcInit);
-    if (pInfo->pTransporter == NULL) {
-      return NULL;  // todo
-    }
-  }
-#endif
+  pInfo->pMsgCb = pMsgCb;
 
   return pOperator;
 
@@ -4774,7 +4754,7 @@ SOperatorInfo* createOperatorTree(SPhysiNode* pPhyNode, SExecTaskInfo* pTaskInfo
     } else if (QUERY_NODE_PHYSICAL_PLAN_EXCHANGE == type) {
       SExchangePhysiNode* pExchange = (SExchangePhysiNode*)pPhyNode;
       SSDataBlock*        pResBlock = createResDataBlock(pExchange->node.pOutputDataBlockDesc);
-      return createExchangeOperatorInfo(pExchange->pSrcEndPoints, pResBlock, pTaskInfo);
+      return createExchangeOperatorInfo(pHandle->pMsgCb, pExchange->pSrcEndPoints, pResBlock, pTaskInfo);
     } else if (QUERY_NODE_PHYSICAL_PLAN_STREAM_SCAN == type) {
       SScanPhysiNode* pScanPhyNode = (SScanPhysiNode*)pPhyNode;  // simple child table.
 
diff --git a/source/libs/executor/src/scanoperator.c b/source/libs/executor/src/scanoperator.c
index 2b94c5fdce..ffabfe334c 100644
--- a/source/libs/executor/src/scanoperator.c
+++ b/source/libs/executor/src/scanoperator.c
@@ -1002,7 +1002,7 @@ static SSDataBlock* doSysTableScan(SOperatorInfo* pOperator) {
       pMsgSendInfo->fp = loadSysTableCallback;
 
       int64_t transporterId = 0;
-      int32_t code = asyncSendMsgToServer(pInfo->pTransporter, &pInfo->epSet, &transporterId, pMsgSendInfo);
+      int32_t code = asyncSendMsgToServer(pInfo->readHandle.pMsgCb, NULL, &pInfo->epSet, &transporterId, pMsgSendInfo);
       tsem_wait(&pInfo->ready);
 
       if (pTaskInfo->code) {
@@ -1126,29 +1126,7 @@ SOperatorInfo* createSysTableScanOperatorInfo(void* readHandle, SSDataBlock* pRe
   } else {
     tsem_init(&pInfo->ready, 0, 0);
     pInfo->epSet = epset;
-
-#if 1
-    {  // todo refactor
-      SRpcInit rpcInit;
-      memset(&rpcInit, 0, sizeof(rpcInit));
-      rpcInit.localPort = 0;
-      rpcInit.label = "DB-META";
-      rpcInit.numOfThreads = 1;
-      rpcInit.cfp = qProcessFetchRsp;
-      rpcInit.sessions = tsMaxConnections;
-      rpcInit.connType = TAOS_CONN_CLIENT;
-      rpcInit.user = (char*)"root";
-      rpcInit.idleTime = tsShellActivityTimer * 1000;
-      rpcInit.ckey = "key";
-      rpcInit.spi = 1;
-      rpcInit.secret = (char*)"dcc5bed04851fec854c035b2e40263b6";
-
-      pInfo->pTransporter = rpcOpen(&rpcInit);
-      if (pInfo->pTransporter == NULL) {
-        return NULL;  // todo
-      }
-    }
-#endif
+    pInfo->readHandle = *(SReadHandle*)readHandle;
   }
 
   pOperator->name         = "SysTableScanOperator";
diff --git a/source/libs/qcom/src/queryUtil.c b/source/libs/qcom/src/queryUtil.c
index 288d2e5f76..e6e4ad23e1 100644
--- a/source/libs/qcom/src/queryUtil.c
+++ b/source/libs/qcom/src/queryUtil.c
@@ -136,7 +136,7 @@ int32_t taosAsyncExec(__async_exec_fn_t execFn, void* execParam, int32_t* code)
   return 0;
 }
 
-int32_t asyncSendMsgToServerExt(void* pTransporter, SEpSet* epSet, int64_t* pTransporterId, const SMsgSendInfo* pInfo, bool persistHandle, void *rpcCtx) {
+int32_t asyncSendMsgToServerExt(SMsgCb *pMsgCb, void* pTransporter, SEpSet* epSet, int64_t* pTransporterId, const SMsgSendInfo* pInfo, bool persistHandle, void *rpcCtx) {
   char* pMsg = rpcMallocCont(pInfo->msgInfo.len);
   if (NULL == pMsg) {
     qError("0x%" PRIx64 " msg:%s malloc failed", pInfo->requestId, TMSG_INFO(pInfo->msgType));
@@ -159,12 +159,20 @@ int32_t asyncSendMsgToServerExt(void* pTransporter, SEpSet* epSet, int64_t* pTra
 
   assert(pInfo->fp != NULL);
 
-  rpcSendRequestWithCtx(pTransporter, epSet, &rpcMsg, pTransporterId, rpcCtx);
+  if (pMsgCb != NULL) {
+    // todo in multi-process mode
+    ASSERT(pTransporterId == NULL || *pTransporterId == 0);
+    ASSERT(rpcCtx == NULL);
+    tmsgSendReq(pMsgCb, epSet, &rpcMsg);
+  } else {
+    ASSERT(pTransporter != NULL);
+    rpcSendRequestWithCtx(pTransporter, epSet, &rpcMsg, pTransporterId, rpcCtx);
+  }
   return TSDB_CODE_SUCCESS;
 }
 
-int32_t asyncSendMsgToServer(void* pTransporter, SEpSet* epSet, int64_t* pTransporterId, const SMsgSendInfo* pInfo) {
-  return asyncSendMsgToServerExt(pTransporter, epSet, pTransporterId, pInfo, false, NULL);
+int32_t asyncSendMsgToServer(SMsgCb *pMsgCb, void* pTransporter, SEpSet* epSet, int64_t* pTransporterId, const SMsgSendInfo* pInfo) {
+  return asyncSendMsgToServerExt(pMsgCb, pTransporter, epSet, pTransporterId, pInfo, false, NULL);
 }
 
 char *jobTaskStatusStr(int32_t status) {
diff --git a/source/libs/scheduler/inc/schedulerInt.h b/source/libs/scheduler/inc/schedulerInt.h
index 5906ee8970..ce3808033d 100644
--- a/source/libs/scheduler/inc/schedulerInt.h
+++ b/source/libs/scheduler/inc/schedulerInt.h
@@ -40,8 +40,9 @@ enum {
 };
 
 typedef struct SSchTrans {
-  void *transInst;
-  void *transHandle;
+  void   *transInst;
+  void   *transHandle;
+  SMsgCb *pMsgCb;
 } SSchTrans;
 
 typedef struct SSchHbTrans {
diff --git a/source/libs/scheduler/src/scheduler.c b/source/libs/scheduler/src/scheduler.c
index 53772601ca..4093c6d5c2 100644
--- a/source/libs/scheduler/src/scheduler.c
+++ b/source/libs/scheduler/src/scheduler.c
@@ -1850,7 +1850,7 @@ int32_t schAsyncSendMsg(SSchJob *pJob, SSchTask *pTask, void *transport, SEpSet
          trans->transInst, trans->transHandle);
 
   int64_t transporterId = 0;
-  code = asyncSendMsgToServerExt(trans->transInst, epSet, &transporterId, pMsgSendInfo, persistHandle, ctx);
+  code = asyncSendMsgToServerExt(trans->pMsgCb, trans->transInst, epSet, &transporterId, pMsgSendInfo, persistHandle, ctx);
   if (code) {
     SCH_ERR_JRET(code);
   }
@@ -1940,7 +1940,7 @@ int32_t schBuildAndSendHbMsg(SQueryNodeEpId *nodeEpId) {
   qDebug("start to send hb msg, instance:%p, handle:%p, fqdn:%s, port:%d", trans.transInst, trans.transHandle,
          nodeEpId->ep.fqdn, nodeEpId->ep.port);
 
-  code = asyncSendMsgToServerExt(trans.transInst, &epSet, &transporterId, pMsgSendInfo, true, &rpcCtx);
+  code = asyncSendMsgToServerExt(trans.pMsgCb, trans.transInst, &epSet, &transporterId, pMsgSendInfo, true, &rpcCtx);
   if (code) {
     qError("fail to send hb msg, instance:%p, handle:%p, fqdn:%s, port:%d, error:%x - %s", trans.transInst,
            trans.transHandle, nodeEpId->ep.fqdn, nodeEpId->ep.port, code, tstrerror(code));