diff --git a/source/dnode/mnode/impl/src/mndProfile.c b/source/dnode/mnode/impl/src/mndProfile.c
index b1c19098a5dbd043b5398ccf8ce28d0efb809228..ced52058e1215a311d7e946b734bc200a72011a8 100644
--- a/source/dnode/mnode/impl/src/mndProfile.c
+++ b/source/dnode/mnode/impl/src/mndProfile.c
@@ -243,11 +243,6 @@ static int32_t mndProcessConnectReq(SRpcMsg *pReq) {
     mGError("user:%s, failed to login from %s while acquire user since %s", pReq->info.conn.user, ip, terrstr());
     goto _OVER;
   }
-
-  // if connection is from udfd, no user/password/db check
-  if (strcmp(connReq.app, "udfd") == 0) {
-    goto _CONNECT;
-  }
   
   if (strncmp(connReq.passwd, pUser->pass, TSDB_PASSWORD_LEN - 1) != 0) {
     mGError("user:%s, failed to login from %s since invalid pass, input:%s", pReq->info.conn.user, ip, connReq.passwd);
diff --git a/source/libs/function/src/udfd.c b/source/libs/function/src/udfd.c
index c10895139bdb256193f7fdcb190ff0ee418eeab7..93259924d5913cf43eede16184f5a82fb87a6f51 100644
--- a/source/libs/function/src/udfd.c
+++ b/source/libs/function/src/udfd.c
@@ -965,41 +965,6 @@ int32_t udfdFillUdfInfoFromMNode(void *clientRpc, char *udfName, SUdf *udf) {
   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));
-  // just use default password. this password is not checked by mnode since connection is from udfd
-  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 = taosGetPId();
-  connReq.startTime = taosGetTimestampMs();
-  strcpy(connReq.sVer, version);
-
-  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;
-}
-
 static bool udfdRpcRfp(int32_t code, tmsg_t msgType) {
   if (code == TSDB_CODE_RPC_NETWORK_UNAVAIL || code == TSDB_CODE_RPC_BROKEN_LINK || code == TSDB_CODE_SYN_NOT_LEADER ||
       code == TSDB_CODE_RPC_SOMENODE_NOT_CONNECTED || code == TSDB_CODE_SYN_RESTORING ||
@@ -1379,23 +1344,6 @@ static int32_t udfdRun() {
   return 0;
 }
 
-void udfdConnectMnodeThreadFunc(void *args) {
-  int32_t retryMnodeTimes = 0;
-  int32_t code = 0;
-  while (retryMnodeTimes++ <= TSDB_MAX_REPLICA) {
-    uv_sleep(100 * (1 << retryMnodeTimes));
-    code = udfdConnectToMnode();
-    if (code == 0) {
-      break;
-    }
-    fnError("udfd can not connect to mnode, code: %s. retry", tstrerror(code));
-  }
-
-  if (code != 0) {
-    fnError("udfd can not connect to mnode");
-  }
-}
-
 int32_t udfdInitResidentFuncs() {
   if (strlen(tsUdfdResFuncs) == 0) {
     return TSDB_CODE_SUCCESS;
@@ -1498,9 +1446,6 @@ int main(int argc, char *argv[]) {
 
   udfdInitResidentFuncs();
 
-  uv_thread_t mnodeConnectThread;
-  uv_thread_create(&mnodeConnectThread, udfdConnectMnodeThreadFunc, NULL);
-
   udfdRun();
 
   removeListeningPipe();