diff --git a/source/libs/function/src/tudf.c b/source/libs/function/src/tudf.c
index 192e04c9a3..e0ede63352 100644
--- a/source/libs/function/src/tudf.c
+++ b/source/libs/function/src/tudf.c
@@ -1314,6 +1314,90 @@ int32_t doSetupUdf(char udfName[], UdfcFuncHandle *funcHandle) {
   return err;
 }
 
+int compareUdfcFuncSub(const void* elem1, const void* elem2) {
+  SUdfcFuncStub *stub1 = (SUdfcFuncStub *)elem1;
+  SUdfcFuncStub *stub2 = (SUdfcFuncStub *)elem2;
+  return strcmp(stub1->udfName, stub2->udfName);
+}
+
+int32_t acquireUdfFuncHandle(char* udfName, UdfcFuncHandle* pHandle) {
+  int32_t code = 0;
+  uv_mutex_lock(&gUdfdProxy.udfStubsMutex);
+  SUdfcFuncStub key = {0};
+  strcpy(key.udfName, udfName);
+  int32_t stubIndex = taosArraySearchIdx(gUdfdProxy.udfStubs, &key, compareUdfcFuncSub, TD_EQ);
+  if (stubIndex != -1) {
+    SUdfcFuncStub *foundStub = taosArrayGet(gUdfdProxy.udfStubs, stubIndex);
+    UdfcFuncHandle handle = foundStub->handle;
+    if (handle != NULL && ((SUdfcUvSession*)handle)->udfUvPipe != NULL) {
+      *pHandle = foundStub->handle;
+      ++foundStub->refCount;
+      foundStub->lastRefTime = taosGetTimestampUs();
+      uv_mutex_unlock(&gUdfdProxy.udfStubsMutex);
+      return 0;
+    } else {
+      fnInfo("invalid handle for %s, refCount: %d, last ref time: %"PRId64". remove it from cache",
+             udfName, foundStub->refCount, foundStub->lastRefTime);
+      taosArrayRemove(gUdfdProxy.udfStubs, stubIndex);
+    }
+  }
+  *pHandle = NULL;
+  code = doSetupUdf(udfName, pHandle);
+  if (code == TSDB_CODE_SUCCESS) {
+    SUdfcFuncStub stub = {0};
+    strcpy(stub.udfName, udfName);
+    stub.handle = *pHandle;
+    ++stub.refCount;
+    stub.lastRefTime = taosGetTimestampUs();
+    taosArrayPush(gUdfdProxy.udfStubs, &stub);
+    taosArraySort(gUdfdProxy.udfStubs, compareUdfcFuncSub);
+  } else {
+    *pHandle = NULL;
+  }
+
+  uv_mutex_unlock(&gUdfdProxy.udfStubsMutex);
+  return code;
+}
+
+void releaseUdfFuncHandle(char* udfName) {
+  uv_mutex_lock(&gUdfdProxy.udfStubsMutex);
+  SUdfcFuncStub key = {0};
+  strcpy(key.udfName, udfName);
+  SUdfcFuncStub *foundStub = taosArraySearch(gUdfdProxy.udfStubs, &key, compareUdfcFuncSub, TD_EQ);
+  ASSERT(foundStub);
+  --foundStub->refCount;
+  ASSERT(foundStub->refCount>=0);
+  uv_mutex_unlock(&gUdfdProxy.udfStubsMutex);
+}
+
+int32_t cleanUpUdfs() {
+  uv_mutex_lock(&gUdfdProxy.udfStubsMutex);
+  int32_t i = 0;
+  SArray* udfStubs = taosArrayInit(16, sizeof(SUdfcFuncStub));
+  while (i < taosArrayGetSize(gUdfdProxy.udfStubs)) {
+    SUdfcFuncStub *stub = taosArrayGet(gUdfdProxy.udfStubs, i);
+    if (stub->refCount == 0) {
+      fnInfo("tear down udf. udf name: %s, handle: %p", stub->udfName, stub->handle);
+      doTeardownUdf(stub->handle);
+    } else {
+      fnInfo("udf still in use. udf name: %s, ref count: %d, last ref time: %"PRId64", handle: %p",
+             stub->udfName, stub->refCount, stub->lastRefTime, stub->handle);
+      UdfcFuncHandle handle = stub->handle;
+      if (handle != NULL && ((SUdfcUvSession*)handle)->udfUvPipe != NULL) {
+        taosArrayPush(udfStubs, stub);
+      } else {
+        fnInfo("invalid handle for %s, refCount: %d, last ref time: %"PRId64". remove it from cache",
+               stub->udfName, stub->refCount, stub->lastRefTime);
+      }
+    }
+    ++i;
+  }
+  taosArrayDestroy(gUdfdProxy.udfStubs);
+  gUdfdProxy.udfStubs = udfStubs;
+  uv_mutex_unlock(&gUdfdProxy.udfStubsMutex);
+  return 0;
+}
+
 int32_t callUdf(UdfcFuncHandle handle, int8_t callType, SSDataBlock *input, SUdfInterBuf *state, SUdfInterBuf *state2,
                 SSDataBlock* output, SUdfInterBuf *newState) {
   fnTrace("udfc call udf. callType: %d, funcHandle: %p", callType, handle);
@@ -1437,57 +1521,10 @@ int32_t doCallUdfScalarFunc(UdfcFuncHandle handle, SScalarParam *input, int32_t
   return err;
 }
 
-int compareUdfcFuncSub(const void* elem1, const void* elem2) {
-  SUdfcFuncStub *stub1 = (SUdfcFuncStub *)elem1;
-  SUdfcFuncStub *stub2 = (SUdfcFuncStub *)elem2;
-  return strcmp(stub1->udfName, stub2->udfName);
-}
-
-int32_t accquireUdfFuncHandle(char* udfName, UdfcFuncHandle* pHandle) {
-  int32_t code = 0;
-  uv_mutex_lock(&gUdfdProxy.udfStubsMutex);
-  SUdfcFuncStub key = {0};
-  strcpy(key.udfName, udfName);
-  SUdfcFuncStub *foundStub = taosArraySearch(gUdfdProxy.udfStubs, &key, compareUdfcFuncSub, TD_EQ);
-  if (foundStub != NULL) {
-    uv_mutex_unlock(&gUdfdProxy.udfStubsMutex);
-    *pHandle = foundStub->handle;
-    ++foundStub->refCount;
-    foundStub->lastRefTime = taosGetTimestampUs();
-    return 0;
-  }
-  *pHandle = NULL;
-  code = doSetupUdf(udfName, pHandle);
-  if (code == TSDB_CODE_SUCCESS) {
-    SUdfcFuncStub stub = {0};
-    strcpy(stub.udfName, udfName);
-    stub.handle = *pHandle;
-    ++stub.refCount;
-    stub.lastRefTime = taosGetTimestampUs();
-    taosArrayPush(gUdfdProxy.udfStubs, &stub);
-    taosArraySort(gUdfdProxy.udfStubs, compareUdfcFuncSub);
-  } else {
-    *pHandle = NULL;
-  }
-
-  uv_mutex_unlock(&gUdfdProxy.udfStubsMutex);
-  return code;
-}
-
-void releaseUdfFuncHandle(char* udfName) {
-  uv_mutex_lock(&gUdfdProxy.udfStubsMutex);
-  SUdfcFuncStub key = {0};
-  strcpy(key.udfName, udfName);
-  SUdfcFuncStub *foundStub = taosArraySearch(gUdfdProxy.udfStubs, &key, compareUdfcFuncSub, TD_EQ);
-  ASSERT(foundStub);
-  --foundStub->refCount;
-  ASSERT(foundStub->refCount>=0);
-  uv_mutex_unlock(&gUdfdProxy.udfStubsMutex);
-}
 
 int32_t callUdfScalarFunc(char *udfName, SScalarParam *input, int32_t numOfCols, SScalarParam *output) {
   UdfcFuncHandle handle = NULL;
-  int32_t code = accquireUdfFuncHandle(udfName, &handle);
+  int32_t code = acquireUdfFuncHandle(udfName, &handle);
   if (code != 0) {
     return code;
   }
@@ -1549,7 +1586,7 @@ bool udfAggInit(struct SqlFunctionCtx *pCtx, struct SResultRowEntryInfo* pResult
   }
   UdfcFuncHandle handle;
   int32_t udfCode = 0;
-  if ((udfCode = accquireUdfFuncHandle((char *)pCtx->udfName, &handle)) != 0) {
+  if ((udfCode = acquireUdfFuncHandle((char *)pCtx->udfName, &handle)) != 0) {
     fnError("udfAggInit error. step doSetupUdf. udf code: %d", udfCode);
     return false;
   }
@@ -1662,25 +1699,3 @@ int32_t udfAggFinalize(struct SqlFunctionCtx *pCtx, SSDataBlock* pBlock) {
   releaseUdfFuncHandle(pCtx->udfName);
   return udfCallCode == 0 ? numOfResults : udfCallCode;
 }
-
-int32_t cleanUpUdfs() {
-  uv_mutex_lock(&gUdfdProxy.udfStubsMutex);
-  int32_t i = 0;
-  SArray* udfStubs = taosArrayInit(16, sizeof(SUdfcFuncStub));
-  while (i < taosArrayGetSize(gUdfdProxy.udfStubs)) {
-    SUdfcFuncStub *stub = taosArrayGet(gUdfdProxy.udfStubs, i);
-    if (stub->refCount == 0) {
-      fnInfo("tear down udf. udf name: %s, handle: %p", stub->udfName, stub->handle);
-      doTeardownUdf(stub->handle);
-    } else {
-      fnInfo("udf still in use. udf name: %s, ref count: %d, last ref time: %"PRId64", handle: %p",
-             stub->udfName, stub->refCount, stub->lastRefTime, stub->handle);
-      taosArrayPush(udfStubs, stub);
-    }
-    ++i;
-  }
-  taosArrayDestroy(gUdfdProxy.udfStubs);
-  gUdfdProxy.udfStubs = udfStubs;
-  uv_mutex_unlock(&gUdfdProxy.udfStubsMutex);
-  return 0;
-}
\ No newline at end of file
diff --git a/source/libs/function/src/udfd.c b/source/libs/function/src/udfd.c
index 1bb775de5b..9b6adb5a64 100644
--- a/source/libs/function/src/udfd.c
+++ b/source/libs/function/src/udfd.c
@@ -86,17 +86,148 @@ typedef struct SUdf {
   TUdfDestroyFunc       destroyFunc;
 } SUdf;
 
-// TODO: low priority: change name onxxx to xxxCb, and udfc or udfd as prefix
 // TODO: add private udf structure.
 typedef struct SUdfcFuncHandle {
   SUdf *udf;
 } SUdfcFuncHandle;
 
-int32_t udfdFillUdfInfoFromMNode(void *clientRpc, char *udfName, SUdf *udf);
+typedef enum EUdfdRpcReqRspType {
+  UDFD_RPC_MNODE_CONNECT = 0,
+  UDFD_RPC_RETRIVE_FUNC,
+} EUdfdRpcReqRspType;
+
+typedef struct SUdfdRpcSendRecvInfo {
+  EUdfdRpcReqRspType rpcType;
+  int32_t code;
+  void* param;
+  uv_sem_t resultSem;
+} SUdfdRpcSendRecvInfo;
+
+void udfdProcessRpcRsp(void *parent, SRpcMsg *pMsg, SEpSet *pEpSet) {
+  SUdfdRpcSendRecvInfo *msgInfo = (SUdfdRpcSendRecvInfo *)pMsg->info.ahandle;
+  ASSERT(pMsg->info.ahandle != NULL);
+
+  if (pEpSet) {
+    if (!isEpsetEqual(&global.mgmtEp.epSet, pEpSet)) {
+      updateEpSet_s(&global.mgmtEp, pEpSet);
+    }
+  }
+
+  if (pMsg->code != TSDB_CODE_SUCCESS) {
+    fnError("udfd rpc error. code: %s", tstrerror(pMsg->code));
+    msgInfo->code = pMsg->code;
+    goto _return;
+  }
+
+  if (msgInfo->rpcType == UDFD_RPC_MNODE_CONNECT) {
+    SConnectRsp connectRsp = {0};
+    tDeserializeSConnectRsp(pMsg->pCont, pMsg->contLen, &connectRsp);
+    if (connectRsp.epSet.numOfEps == 0) {
+      msgInfo->code = TSDB_CODE_MND_APP_ERROR;
+      goto _return;
+    }
+
+    if (connectRsp.dnodeNum > 1 && !isEpsetEqual(&global.mgmtEp.epSet, &connectRsp.epSet)) {
+      updateEpSet_s(&global.mgmtEp, &connectRsp.epSet);
+    }
+    msgInfo->code = 0;
+  } else if (msgInfo->rpcType == UDFD_RPC_RETRIVE_FUNC) {
+    SRetrieveFuncRsp retrieveRsp = {0};
+    tDeserializeSRetrieveFuncRsp(pMsg->pCont, pMsg->contLen, &retrieveRsp);
+
+    SFuncInfo *pFuncInfo = (SFuncInfo *)taosArrayGet(retrieveRsp.pFuncInfos, 0);
+    SUdf* udf = msgInfo->param;
+    udf->funcType = pFuncInfo->funcType;
+    udf->scriptType = pFuncInfo->scriptType;
+    udf->outputType = pFuncInfo->funcType;
+    udf->outputLen = pFuncInfo->outputLen;
+    udf->bufSize = pFuncInfo->bufSize;
+
+    char path[PATH_MAX] = {0};
+    snprintf(path, sizeof(path), "%s/lib%s.so", "/tmp", pFuncInfo->name);
+    TdFilePtr file = taosOpenFile(path, TD_FILE_CREATE | TD_FILE_WRITE | TD_FILE_READ | TD_FILE_TRUNC | TD_FILE_AUTO_DEL);
+    // TODO check for failure of flush to disk
+    taosWriteFile(file, pFuncInfo->pCode, pFuncInfo->codeSize);
+    taosCloseFile(&file);
+    strncpy(udf->path, path, strlen(path));
+    tFreeSFuncInfo(pFuncInfo);
+    taosArrayDestroy(retrieveRsp.pFuncInfos);
+    msgInfo->code = 0;
+  }
+
+_return:
+  rpcFreeCont(pMsg->pCont);
+  uv_sem_post(&msgInfo->resultSem);
+  return;
+}
+
+int32_t udfdFillUdfInfoFromMNode(void *clientRpc, char *udfName, SUdf *udf) {
+  SRetrieveFuncReq retrieveReq = {0};
+  retrieveReq.numOfFuncs = 1;
+  retrieveReq.pFuncNames = taosArrayInit(1, TSDB_FUNC_NAME_LEN);
+  taosArrayPush(retrieveReq.pFuncNames, udfName);
+
+  int32_t contLen = tSerializeSRetrieveFuncReq(NULL, 0, &retrieveReq);
+  void   *pReq = rpcMallocCont(contLen);
+  tSerializeSRetrieveFuncReq(pReq, contLen, &retrieveReq);
+  taosArrayDestroy(retrieveReq.pFuncNames);
+
+  SUdfdRpcSendRecvInfo* msgInfo = taosMemoryCalloc(1, sizeof(SUdfdRpcSendRecvInfo));
+  msgInfo->rpcType = UDFD_RPC_RETRIVE_FUNC;
+  msgInfo->param = udf;
+  uv_sem_init(&msgInfo->resultSem, 0);
+
+  SRpcMsg rpcMsg = {0};
+  rpcMsg.pCont = pReq;
+  rpcMsg.contLen = contLen;
+  rpcMsg.msgType = TDMT_MND_RETRIEVE_FUNC;
+  rpcMsg.info.ahandle = msgInfo;
+  rpcSendRequest(clientRpc, &global.mgmtEp.epSet, &rpcMsg, NULL);
+
+  uv_sem_wait(&msgInfo->resultSem);
+  uv_sem_destroy(&msgInfo->resultSem);
+  int32_t code = msgInfo->code;
+  taosMemoryFree(msgInfo);
+  return code;
+}
+
+int32_t udfdConnectToMnode() {
+  SConnectReq connReq = {0};
+  connReq.connType = CONN_TYPE__UDFD;
+  tstrncpy(connReq.app, "udfd",sizeof(connReq.app));
+  tstrncpy(connReq.user, TSDB_DEFAULT_USER, sizeof(connReq.user));
+  char pass[TSDB_PASSWORD_LEN + 1] = {0};
+  taosEncryptPass_c((uint8_t *)(TSDB_DEFAULT_PASS), strlen(TSDB_DEFAULT_PASS), pass);
+  tstrncpy(connReq.passwd, pass, sizeof(connReq.passwd));
+  connReq.pid = htonl(taosGetPId());
+  connReq.startTime = htobe64(taosGetTimestampMs());
+
+  int32_t contLen = tSerializeSConnectReq(NULL, 0, &connReq);
+  void*   pReq = rpcMallocCont(contLen);
+  tSerializeSConnectReq(pReq, contLen, &connReq);
+
+  SUdfdRpcSendRecvInfo *msgInfo = taosMemoryCalloc(1, sizeof(SUdfdRpcSendRecvInfo));
+  msgInfo->rpcType = UDFD_RPC_MNODE_CONNECT;
+  uv_sem_init(&msgInfo->resultSem, 0);
+
+  SRpcMsg rpcMsg = {0};
+  rpcMsg.msgType = TDMT_MND_CONNECT;
+  rpcMsg.pCont = pReq;
+  rpcMsg.contLen = contLen;
+  rpcMsg.info.ahandle = msgInfo;
+  rpcSendRequest(global.clientRpc, &global.mgmtEp.epSet, &rpcMsg, NULL);
+
+  uv_sem_wait(&msgInfo->resultSem);
+  int32_t code = msgInfo->code;
+  uv_sem_destroy(&msgInfo->resultSem);
+  taosMemoryFree(msgInfo);
+  return code;
+}
 
 int32_t udfdLoadUdf(char *udfName, SUdf *udf) {
   strcpy(udf->name, udfName);
   int32_t err = 0;
+
   err = udfdFillUdfInfoFromMNode(global.clientRpc, udf->name, udf);
   if (err != 0) {
     fnError("can not retrieve udf from mnode. udf name %s", udfName);
@@ -515,140 +646,6 @@ void udfdIntrSignalHandler(uv_signal_t *handle, int signum) {
   uv_stop(global.loop);
 }
 
-typedef enum EUdfdRpcReqRspType {
-  UDFD_RPC_MNODE_CONNECT = 0,
-  UDFD_RPC_RETRIVE_FUNC,
-} EUdfdRpcReqRspType;
-
-typedef struct SUdfdRpcSendRecvInfo {
-  EUdfdRpcReqRspType rpcType;
-  int32_t code;
-  void* param;
-  uv_sem_t resultSem;
-} SUdfdRpcSendRecvInfo;
-
-
-void udfdProcessRpcRsp(void *parent, SRpcMsg *pMsg, SEpSet *pEpSet) {
-  SUdfdRpcSendRecvInfo *msgInfo = (SUdfdRpcSendRecvInfo *)pMsg->info.ahandle;
-  ASSERT(pMsg->info.ahandle != NULL);
-
-  if (pEpSet) {
-    if (!isEpsetEqual(&global.mgmtEp.epSet, pEpSet)) {
-      updateEpSet_s(&global.mgmtEp, pEpSet);
-    }
-  }
-
-  if (pMsg->code != TSDB_CODE_SUCCESS) {
-    fnError("udfd rpc error. code: %s", tstrerror(pMsg->code));
-    msgInfo->code = pMsg->code;
-    goto _return;
-  }
-
-  if (msgInfo->rpcType == UDFD_RPC_MNODE_CONNECT) {
-    SConnectRsp connectRsp = {0};
-    tDeserializeSConnectRsp(pMsg->pCont, pMsg->contLen, &connectRsp);
-    if (connectRsp.epSet.numOfEps == 0) {
-      msgInfo->code = TSDB_CODE_MND_APP_ERROR;
-      goto _return;
-    }
-
-    if (connectRsp.dnodeNum > 1 && !isEpsetEqual(&global.mgmtEp.epSet, &connectRsp.epSet)) {
-      updateEpSet_s(&global.mgmtEp, &connectRsp.epSet);
-    }
-    msgInfo->code = 0;
-  } else if (msgInfo->rpcType == UDFD_RPC_RETRIVE_FUNC) {
-    SRetrieveFuncRsp retrieveRsp = {0};
-    tDeserializeSRetrieveFuncRsp(pMsg->pCont, pMsg->contLen, &retrieveRsp);
-
-    SFuncInfo *pFuncInfo = (SFuncInfo *)taosArrayGet(retrieveRsp.pFuncInfos, 0);
-    SUdf* udf = msgInfo->param;
-    udf->funcType = pFuncInfo->funcType;
-    udf->scriptType = pFuncInfo->scriptType;
-    udf->outputType = pFuncInfo->funcType;
-    udf->outputLen = pFuncInfo->outputLen;
-    udf->bufSize = pFuncInfo->bufSize;
-
-    char path[PATH_MAX] = {0};
-    snprintf(path, sizeof(path), "%s/lib%s.so", "/tmp", pFuncInfo->name);
-    TdFilePtr file = taosOpenFile(path, TD_FILE_CREATE | TD_FILE_WRITE | TD_FILE_READ | TD_FILE_TRUNC | TD_FILE_AUTO_DEL);
-    // TODO check for failure of flush to disk
-    taosWriteFile(file, pFuncInfo->pCode, pFuncInfo->codeSize);
-    taosCloseFile(&file);
-    strncpy(udf->path, path, strlen(path));
-    tFreeSFuncInfo(pFuncInfo);
-    taosArrayDestroy(retrieveRsp.pFuncInfos);
-    msgInfo->code = 0;
-  }
-
-_return:
-  rpcFreeCont(pMsg->pCont);
-  uv_sem_post(&msgInfo->resultSem);
-  return;
-}
-
-int32_t udfdConnectToMNode() {
-  SConnectReq connReq = {0};
-  connReq.connType = CONN_TYPE__UDFD;
-  tstrncpy(connReq.app, "udfd",sizeof(connReq.app));
-  tstrncpy(connReq.user, TSDB_DEFAULT_USER, sizeof(connReq.user));
-  char pass[TSDB_PASSWORD_LEN + 1] = {0};
-  taosEncryptPass_c((uint8_t *)(TSDB_DEFAULT_PASS), strlen(TSDB_DEFAULT_PASS), pass);
-  tstrncpy(connReq.passwd, pass, sizeof(connReq.passwd));
-  connReq.pid = htonl(taosGetPId());
-  connReq.startTime = htobe64(taosGetTimestampMs());
-
-  int32_t contLen = tSerializeSConnectReq(NULL, 0, &connReq);
-  void*   pReq = rpcMallocCont(contLen);
-  tSerializeSConnectReq(pReq, contLen, &connReq);
-
-  SUdfdRpcSendRecvInfo *msgInfo = taosMemoryCalloc(1, sizeof(SUdfdRpcSendRecvInfo));
-  msgInfo->rpcType = UDFD_RPC_MNODE_CONNECT;
-  uv_sem_init(&msgInfo->resultSem, 0);
-
-  SRpcMsg rpcMsg = {0};
-  rpcMsg.msgType = TDMT_MND_CONNECT;
-  rpcMsg.pCont = pReq;
-  rpcMsg.contLen = contLen;
-  rpcMsg.info.ahandle = msgInfo;
-  rpcSendRequest(global.clientRpc, &global.mgmtEp.epSet, &rpcMsg, NULL);
-
-  uv_sem_wait(&msgInfo->resultSem);
-  int32_t code = msgInfo->code;
-  uv_sem_destroy(&msgInfo->resultSem);
-  taosMemoryFree(msgInfo);
-  return code;
-}
-
-int32_t udfdFillUdfInfoFromMNode(void *clientRpc, char *udfName, SUdf *udf) {
-  SRetrieveFuncReq retrieveReq = {0};
-  retrieveReq.numOfFuncs = 1;
-  retrieveReq.pFuncNames = taosArrayInit(1, TSDB_FUNC_NAME_LEN);
-  taosArrayPush(retrieveReq.pFuncNames, udfName);
-
-  int32_t contLen = tSerializeSRetrieveFuncReq(NULL, 0, &retrieveReq);
-  void   *pReq = rpcMallocCont(contLen);
-  tSerializeSRetrieveFuncReq(pReq, contLen, &retrieveReq);
-  taosArrayDestroy(retrieveReq.pFuncNames);
-
-  SUdfdRpcSendRecvInfo* msgInfo = taosMemoryCalloc(1, sizeof(SUdfdRpcSendRecvInfo));
-  msgInfo->rpcType = UDFD_RPC_RETRIVE_FUNC;
-  msgInfo->param = udf;
-  uv_sem_init(&msgInfo->resultSem, 0);
-
-  SRpcMsg rpcMsg = {0};
-  rpcMsg.pCont = pReq;
-  rpcMsg.contLen = contLen;
-  rpcMsg.msgType = TDMT_MND_RETRIEVE_FUNC;
-  rpcMsg.info.ahandle = msgInfo;
-  rpcSendRequest(clientRpc, &global.mgmtEp.epSet, &rpcMsg, NULL);
-
-  uv_sem_wait(&msgInfo->resultSem);
-  uv_sem_destroy(&msgInfo->resultSem);
-  int32_t code = msgInfo->code;
-  taosMemoryFree(msgInfo);
-  return code;
-}
-
 static bool udfdRpcRfp(int32_t code) {
   if (code == TSDB_CODE_RPC_REDIRECT) {
     return true;
@@ -884,7 +881,18 @@ int main(int argc, char *argv[]) {
     return -3;
   }
 
-  if (udfdConnectToMNode() != 0) {
+  int32_t retryMnodeTimes = 0;
+  int32_t code = 0;
+  while (retryMnodeTimes++ < TSDB_MAX_REPLICA) {
+    uv_sleep(500 * ( 1 << retryMnodeTimes));
+    code = udfdConnectToMnode();
+    if (code == 0) {
+      break;
+    }
+    fnError("can not connect to mnode, code: %s. retry", tstrerror(code));
+  }
+
+  if (code != 0) {
     fnError("failed to start since can not connect to mnode");
     return -4;
   }
diff --git a/source/libs/function/test/runUdf.c b/source/libs/function/test/runUdf.c
index 9fe9269a3f..15109db220 100644
--- a/source/libs/function/test/runUdf.c
+++ b/source/libs/function/test/runUdf.c
@@ -41,41 +41,41 @@ int scalarFuncTest() {
     fnError("setup udf failure");
     return -1;
   }
-
-  SSDataBlock  block = {0};
-  SSDataBlock *pBlock = &block;
-  pBlock->pDataBlock = taosArrayInit(1, sizeof(SColumnInfoData));
-  pBlock->info.numOfCols = 1;
-  pBlock->info.rows = 4;
-  char data[16] = {0};
-  char bitmap[4] = {0};
-  for (int32_t i = 0; i < pBlock->info.numOfCols; ++i) {
-    SColumnInfoData colInfo = {0};
-    colInfo.info.type = TSDB_DATA_TYPE_INT;
-    colInfo.info.bytes = sizeof(int32_t);
-    colInfo.info.colId = 1;
-    colInfo.pData = data;
-    colInfo.nullbitmap = bitmap;
-    for (int32_t j = 0; j < pBlock->info.rows; ++j) {
-      colDataAppendInt32(&colInfo, j, &j);
+  int64_t beg = taosGetTimestampUs();
+  for (int k = 0; k < 1; ++k) {
+    SSDataBlock  block = {0};
+    SSDataBlock *pBlock = &block;
+    pBlock->pDataBlock = taosArrayInit(1, sizeof(SColumnInfoData));
+    pBlock->info.numOfCols = 1;
+    pBlock->info.rows = 1024;
+    for (int32_t i = 0; i < pBlock->info.numOfCols; ++i) {
+      SColumnInfoData colInfo = {0};
+      colInfo.info.type = TSDB_DATA_TYPE_INT;
+      colInfo.info.bytes = sizeof(int32_t);
+      colInfo.info.colId = 1;
+      colInfoDataEnsureCapacity(&colInfo, 0, pBlock->info.rows);
+      for (int32_t j = 0; j < pBlock->info.rows; ++j) {
+        colDataAppendInt32(&colInfo, j, &j);
+      }
+      taosArrayPush(pBlock->pDataBlock, &colInfo);
     }
-    taosArrayPush(pBlock->pDataBlock, &colInfo);
+
+    SScalarParam input = {0};
+    input.numOfRows = pBlock->info.rows;
+    input.columnData = taosArrayGet(pBlock->pDataBlock, 0);
+    SScalarParam output = {0};
+    doCallUdfScalarFunc(handle, &input, 1, &output);
+    taosArrayDestroy(pBlock->pDataBlock);
+    SColumnInfoData *col = output.columnData;
+    for (int32_t i = 0; i < output.numOfRows; ++i) {
+      if (i % 100 == 0)
+        fprintf(stderr, "%d\t%d\n", i, *(int32_t *)(col->pData + i * sizeof(int32_t)));
+    }
+    colDataDestroy(output.columnData);
+    taosMemoryFree(output.columnData);
   }
-
-  SScalarParam input = {0};
-  input.numOfRows = pBlock->info.rows;
-  input.columnData = taosArrayGet(pBlock->pDataBlock, 0);
-  SScalarParam output = {0};
-  doCallUdfScalarFunc(handle, &input, 1, &output);
-  taosArrayDestroy(pBlock->pDataBlock);
-  SColumnInfoData *col = output.columnData;
-  for (int32_t i = 0; i < output.numOfRows; ++i) {
-    fprintf(stderr, "%d\t%d\n", i, *(int32_t *)(col->pData + i * sizeof(int32_t)));
-  }
-
-  colDataDestroy(output.columnData);
-  taosMemoryFree(output.columnData);
-
+  int64_t end = taosGetTimestampUs();
+  fprintf(stderr, "time: %f\n", (end-beg)/1000.0);
   doTeardownUdf(handle);
 
   return 0;
@@ -93,16 +93,13 @@ int aggregateFuncTest() {
   SSDataBlock *pBlock = &block;
   pBlock->pDataBlock = taosArrayInit(1, sizeof(SColumnInfoData));
   pBlock->info.numOfCols = 1;
-  pBlock->info.rows = 4;
-  char data[16] = {0};
-  char bitmap[4] = {0};
+  pBlock->info.rows = 1024;
   for (int32_t i = 0; i < pBlock->info.numOfCols; ++i) {
     SColumnInfoData colInfo = {0};
     colInfo.info.type = TSDB_DATA_TYPE_INT;
     colInfo.info.bytes = sizeof(int32_t);
     colInfo.info.colId = 1;
-    colInfo.pData = data;
-    colInfo.nullbitmap = bitmap;
+    colInfoDataEnsureCapacity(&colInfo, 0, pBlock->info.rows);
     for (int32_t j = 0; j < pBlock->info.rows; ++j) {
       colDataAppendInt32(&colInfo, j, &j);
     }