diff --git a/source/dnode/mgmt/bnode/src/bmInt.c b/source/dnode/mgmt/bnode/src/bmInt.c
index dbfcfd15f8..5a1b25a4ec 100644
--- a/source/dnode/mgmt/bnode/src/bmInt.c
+++ b/source/dnode/mgmt/bnode/src/bmInt.c
@@ -53,7 +53,7 @@ static bool bmRequire(SMgmtWrapper *pWrapper) {
 
   if (mgmt.dropped) {
     dInfo("bnode has been dropped and needs to be deleted");
-    mndDestroy(mgmt.path);
+    taosRemoveDir(mgmt.path);
     return false;
   }
 
@@ -66,7 +66,6 @@ static bool bmRequire(SMgmtWrapper *pWrapper) {
 
 void bmInitOption(SBnodeMgmt *pMgmt, SBnodeOpt *pOption) {
   SDnode *pDnode = pMgmt->pDnode;
-
   pOption->pWrapper = pMgmt->pWrapper;
   pOption->sendReqFp = dndSendReqToDnode;
   pOption->sendMnodeReqFp = dndSendReqToMnode;
diff --git a/source/dnode/mgmt/container/inc/dnd.h b/source/dnode/mgmt/container/inc/dnd.h
index 050a437405..5de9d0938a 100644
--- a/source/dnode/mgmt/container/inc/dnd.h
+++ b/source/dnode/mgmt/container/inc/dnd.h
@@ -162,8 +162,7 @@ int32_t dndInitWorker(void *param, SDnodeWorker *pWorker, EWorkerType type, cons
 void    dndCleanupWorker(SDnodeWorker *pWorker);
 int32_t dndWriteMsgToWorker(SDnodeWorker *pWorker, void *pCont, int32_t contLen);
 
-int32_t dndProcessCreateNodeMsg(SDnode *pDnode, SNodeMsg *pMsg);
-int32_t dndProcessDropNodeMsg(SDnode *pDnode, SNodeMsg *pMsg);
+int32_t dndProcessNodeMsg(SDnode *pDnode, SNodeMsg *pMsg);
 
 #ifdef __cplusplus
 }
diff --git a/source/dnode/mgmt/container/inc/dndInt.h b/source/dnode/mgmt/container/inc/dndInt.h
index ca60b850bf..d173771d3d 100644
--- a/source/dnode/mgmt/container/inc/dndInt.h
+++ b/source/dnode/mgmt/container/inc/dndInt.h
@@ -41,8 +41,8 @@ void        dndProcessStartupReq(SDnode *pDnode, SRpcMsg *pMsg);
 void dndProcessRpcMsg(SMgmtWrapper *pWrapper, SRpcMsg *pMsg, SEpSet *pEpSet);
 
 // dndExec.c
-int32_t dndOpenNode(SMgmtWrapper *pWrapper);
-void    dndCloseNode(SMgmtWrapper *pWrapper);
+int32_t dndOpenNode(SDnode *pDnode, ENodeType nodeType);
+int32_t dndCloseNode(SDnode *pDnode, ENodeType nodeType);
 int32_t dndRun(SDnode *pDnode);
 
 // dndObj.c
@@ -51,6 +51,7 @@ void    dndClose(SDnode *pDnode);
 void    dndHandleEvent(SDnode *pDnode, EDndEvent event);
 
 SMgmtWrapper *dndAcquireWrapper(SDnode *pDnode, ENodeType nodeType);
+int32_t       dndMarkWrapper(SMgmtWrapper *pWrapper);
 void          dndReleaseWrapper(SMgmtWrapper *pWrapper);
 
 // dndTransport.c
diff --git a/source/dnode/mgmt/container/src/dndExec.c b/source/dnode/mgmt/container/src/dndExec.c
index c2a2205d70..bc1359664f 100644
--- a/source/dnode/mgmt/container/src/dndExec.c
+++ b/source/dnode/mgmt/container/src/dndExec.c
@@ -35,37 +35,51 @@ static bool dndRequireNode(SMgmtWrapper *pWrapper) {
   return required;
 }
 
-int32_t dndOpenNode(SMgmtWrapper *pWrapper) { 
+int32_t dndOpenNode(SDnode *pDnode, ENodeType ntype) {
+  SMgmtWrapper *pWrapper = dndAcquireWrapper(pDnode, ntype);
+  if (pWrapper != NULL) {
+    dndReleaseWrapper(pWrapper);
+    terrno = TSDB_CODE_NODE_ALREADY_DEPLOYED;
+    return -1;
+  }
+
+  pWrapper = &pDnode->wrappers[ntype];
   int32_t code = (*pWrapper->fp.openFp)(pWrapper);
   if (code != 0) {
     dError("node:%s, failed to open since %s", pWrapper->name, terrstr());
-    return -1;
   } else {
     dDebug("node:%s, has been opened", pWrapper->name);
+    pWrapper->deployed = true;
   }
 
-  pWrapper->deployed = true;
-  return 0;
+  return code;
 }
 
-void dndCloseNode(SMgmtWrapper *pWrapper) {
-  taosWLockLatch(&pWrapper->latch);
-  if (pWrapper->deployed) {
-    (*pWrapper->fp.closeFp)(pWrapper);
-    pWrapper->deployed = false;
+int32_t dndCloseNode(SDnode *pDnode, ENodeType ntype) {
+  SMgmtWrapper *pWrapper = dndAcquireWrapper(pDnode, ntype);
+  if (pWrapper == NULL) {
+    terrno = TSDB_CODE_NODE_NOT_DEPLOYED;
+    return -1;
   }
+
+  taosWLockLatch(&pWrapper->latch);
+  (*pWrapper->fp.closeFp)(pWrapper);
+  pWrapper->deployed = false;
   if (pWrapper->pProc) {
     taosProcCleanup(pWrapper->pProc);
     pWrapper->pProc = NULL;
   }
   taosWUnLockLatch(&pWrapper->latch);
+
+  dndReleaseWrapper(pWrapper);
+  return 0;
 }
 
 static int32_t dndRunInSingleProcess(SDnode *pDnode) {
   dInfo("dnode run in single process mode");
 
-  for (ENodeType n = 0; n < NODE_MAX; ++n) {
-    SMgmtWrapper *pWrapper = &pDnode->wrappers[n];
+  for (ENodeType ntype = 0; ntype < NODE_MAX; ++ntype) {
+    SMgmtWrapper *pWrapper = &pDnode->wrappers[ntype];
     pWrapper->required = dndRequireNode(pWrapper);
     if (!pWrapper->required) continue;
 
@@ -77,14 +91,14 @@ static int32_t dndRunInSingleProcess(SDnode *pDnode) {
 
     dInfo("node:%s, will start in single process", pWrapper->name);
     pWrapper->procType = PROC_SINGLE;
-    if (dndOpenNode(pWrapper) != 0) {
+    if (dndOpenNode(pDnode, ntype) != 0) {
       dError("node:%s, failed to start since %s", pWrapper->name, terrstr());
       return -1;
     }
   }
 
   SMgmtWrapper *pWrapper = dndAcquireWrapper(pDnode, DNODE);
-  int32_t code = dmStart(pWrapper->pMgmt);
+  int32_t       code = dmStart(pWrapper->pMgmt);
   if (code != 0) {
     dError("failed to start dnode worker since %s", terrstr());
   }
@@ -95,10 +109,9 @@ static int32_t dndRunInSingleProcess(SDnode *pDnode) {
 
 static void dndClearNodesExecpt(SDnode *pDnode, ENodeType except) {
   dndCleanupServer(pDnode);
-  for (ENodeType n = 0; n < NODE_MAX; ++n) {
-    if (except == n) continue;
-    SMgmtWrapper *pWrapper = &pDnode->wrappers[n];
-    dndCloseNode(pWrapper);
+  for (ENodeType ntype = 0; ntype < NODE_MAX; ++ntype) {
+    if (except == ntype) continue;
+    (void)dndCloseNode(pDnode, ntype);
   }
 }
 
@@ -111,8 +124,7 @@ static void dndConsumeChildQueue(SMgmtWrapper *pWrapper, SNodeMsg *pMsg, int32_t
   int32_t   code = (*msgFp)(pWrapper, pMsg);
 
   if (code != 0) {
-    bool isReq = (pRpc->msgType & 1U);
-    if (isReq) {
+    if (pRpc->msgType & 1U) {
       SRpcMsg rsp = {.handle = pRpc->handle, .ahandle = pRpc->ahandle, .code = terrno};
       dndSendRsp(pWrapper, &rsp);
     }
@@ -133,8 +145,8 @@ static void dndConsumeParentQueue(SMgmtWrapper *pWrapper, SRpcMsg *pRsp, int32_t
 static int32_t dndRunInMultiProcess(SDnode *pDnode) {
   dInfo("dnode run in multi process mode");
 
-  for (ENodeType n = 0; n < NODE_MAX; ++n) {
-    SMgmtWrapper *pWrapper = &pDnode->wrappers[n];
+  for (ENodeType ntype = 0; ntype < NODE_MAX; ++ntype) {
+    SMgmtWrapper *pWrapper = &pDnode->wrappers[ntype];
     pWrapper->required = dndRequireNode(pWrapper);
     if (!pWrapper->required) continue;
 
@@ -144,10 +156,10 @@ static int32_t dndRunInMultiProcess(SDnode *pDnode) {
       return -1;
     }
 
-    if (n == DNODE) {
+    if (ntype == DNODE) {
       dInfo("node:%s, will start in parent process", pWrapper->name);
       pWrapper->procType = PROC_SINGLE;
-      if (dndOpenNode(pWrapper) != 0) {
+      if (dndOpenNode(pDnode, ntype) != 0) {
         dError("node:%s, failed to start since %s", pWrapper->name, terrstr());
         return -1;
       }
@@ -183,10 +195,10 @@ static int32_t dndRunInMultiProcess(SDnode *pDnode) {
       dndResetLog(pWrapper);
 
       dInfo("node:%s, clean up resources inherited from parent", pWrapper->name);
-      dndClearNodesExecpt(pDnode, n);
+      dndClearNodesExecpt(pDnode, ntype);
 
       dInfo("node:%s, will be initialized in child process", pWrapper->name);
-      dndOpenNode(pWrapper);
+      dndOpenNode(pDnode, ntype);
     } else {
       dInfo("node:%s, will not start in parent process", pWrapper->name);
       pWrapper->procType = PROC_PARENT;
diff --git a/source/dnode/mgmt/container/src/dndMsg.c b/source/dnode/mgmt/container/src/dndMsg.c
index 9497c9368d..f4b763725e 100644
--- a/source/dnode/mgmt/container/src/dndMsg.c
+++ b/source/dnode/mgmt/container/src/dndMsg.c
@@ -16,7 +16,24 @@
 #define _DEFAULT_SOURCE
 #include "dndInt.h"
 
-static int32_t dndBuildMsg(SNodeMsg *pMsg, SRpcMsg *pRpc, SEpSet *pEpSet) {
+static void dndUpdateMnodeEpSet(SDnode *pDnode, SEpSet *pEpSet) {
+  SMgmtWrapper *pWrapper = dndAcquireWrapper(pDnode, DNODE);
+  if (pWrapper != NULL) {
+    dmUpdateMnodeEpSet(pWrapper->pMgmt, pEpSet);
+  }
+  dndReleaseWrapper(pWrapper);
+}
+
+static inline NodeMsgFp dndGetMsgFp(SMgmtWrapper *pWrapper, SRpcMsg *pRpc) {
+  NodeMsgFp msgFp = pWrapper->msgFps[TMSG_INDEX(pRpc->msgType)];
+  if (msgFp == NULL) {
+    terrno = TSDB_CODE_MSG_NOT_PROCESSED;
+  }
+
+  return msgFp;
+}
+
+static inline int32_t dndBuildMsg(SNodeMsg *pMsg, SRpcMsg *pRpc) {
   SRpcConnInfo connInfo = {0};
   if ((pRpc->msgType & 1U) && rpcGetConnInfo(pRpc->handle, &connInfo) != 0) {
     terrno = TSDB_CODE_MND_NO_USER_FROM_CONN;
@@ -25,47 +42,34 @@ static int32_t dndBuildMsg(SNodeMsg *pMsg, SRpcMsg *pRpc, SEpSet *pEpSet) {
   }
 
   memcpy(pMsg->user, connInfo.user, TSDB_USER_LEN);
-  pMsg->rpcMsg = *pRpc;
+  memcpy(&pMsg->rpcMsg, pRpc, sizeof(SRpcMsg));
 
   return 0;
 }
 
 void dndProcessRpcMsg(SMgmtWrapper *pWrapper, SRpcMsg *pRpc, SEpSet *pEpSet) {
   if (pEpSet && pEpSet->numOfEps > 0 && pRpc->msgType == TDMT_MND_STATUS_RSP) {
-    dmUpdateMnodeEpSet(dndAcquireWrapper(pWrapper->pDnode, DNODE)->pMgmt, pEpSet);
+    dndUpdateMnodeEpSet(pWrapper->pDnode, pEpSet);
   }
 
   int32_t   code = -1;
   SNodeMsg *pMsg = NULL;
+  NodeMsgFp msgFp = NULL;
 
-  NodeMsgFp msgFp = pWrapper->msgFps[TMSG_INDEX(pRpc->msgType)];
-  if (msgFp == NULL) {
-    terrno = TSDB_CODE_MSG_NOT_PROCESSED;
-    goto _OVER;
-  }
-
-  pMsg = taosAllocateQitem(sizeof(SNodeMsg));
-  if (pMsg == NULL) {
-    goto _OVER;
-  }
-
-  if (dndBuildMsg(pMsg, pRpc, pEpSet) != 0) {
-    goto _OVER;
-  }
+  if (dndMarkWrapper(pWrapper) != 0) goto _OVER;
+  if ((msgFp = dndGetMsgFp(pWrapper, pRpc)) == NULL) goto _OVER;
+  if ((pMsg = taosAllocateQitem(sizeof(SNodeMsg))) == NULL) goto _OVER;
+  if (dndBuildMsg(pMsg, pRpc) != 0) goto _OVER;
 
   dTrace("msg:%p, is created, app:%p user:%s", pMsg, pRpc->ahandle, pMsg->user);
-
   if (pWrapper->procType == PROC_SINGLE) {
     code = (*msgFp)(pWrapper->pMgmt, pMsg);
   } else if (pWrapper->procType == PROC_PARENT) {
     code = taosProcPutToChildQueue(pWrapper->pProc, pMsg, sizeof(SNodeMsg), pRpc->pCont, pRpc->contLen);
   } else {
-    terrno = TSDB_CODE_MEMORY_CORRUPTED;
-    dError("msg:%p, won't be processed for it is child process", pMsg);
   }
 
 _OVER:
-
   if (code == 0) {
     if (pWrapper->procType == PROC_PARENT) {
       dTrace("msg:%p, is freed", pMsg);
@@ -74,8 +78,7 @@ _OVER:
     }
   } else {
     dError("msg:%p, failed to process since %s", pMsg, terrstr());
-    bool isReq = (pRpc->msgType & 1U);
-    if (isReq) {
+    if (pRpc->msgType & 1U) {
       SRpcMsg rsp = {.handle = pRpc->handle, .ahandle = pRpc->ahandle, .code = terrno};
       dndSendRsp(pWrapper, &rsp);
     }
@@ -83,57 +86,29 @@ _OVER:
     taosFreeQitem(pMsg);
     rpcFreeCont(pRpc->pCont);
   }
+
+  dndReleaseWrapper(pWrapper);
 }
 
-static SMgmtWrapper *dndGetWrapperFromMsg(SDnode *pDnode, SNodeMsg *pMsg) {
-  SMgmtWrapper *pWrapper = NULL;
+int32_t dndProcessNodeMsg(SDnode *pDnode, SNodeMsg *pMsg) {
   switch (pMsg->rpcMsg.msgType) {
     case TDMT_DND_CREATE_MNODE:
-      return dndAcquireWrapper(pDnode, MNODE);
-    case TDMT_DND_CREATE_QNODE:
-      return dndAcquireWrapper(pDnode, QNODE);
-    case TDMT_DND_CREATE_SNODE:
-      return dndAcquireWrapper(pDnode, SNODE);
-    case TDMT_DND_CREATE_BNODE:
-      return dndAcquireWrapper(pDnode, BNODE);
-    default:
-      return NULL;
-  }
-}
-
-int32_t dndProcessCreateNodeMsg(SDnode *pDnode, SNodeMsg *pMsg) {
-  SMgmtWrapper *pWrapper = dndGetWrapperFromMsg(pDnode, pMsg);
-  if (pWrapper->procType == PROC_SINGLE) {
-    switch (pMsg->rpcMsg.msgType) {
-      case TDMT_DND_CREATE_MNODE:
-        return mmProcessCreateReq(pWrapper->pMgmt, pMsg);
-      case TDMT_DND_CREATE_QNODE:
-        return qmProcessCreateReq(pWrapper->pMgmt, pMsg);
-      case TDMT_DND_CREATE_SNODE:
-        return smProcessCreateReq(pWrapper->pMgmt, pMsg);
-      case TDMT_DND_CREATE_BNODE:
-        return bmProcessCreateReq(pWrapper->pMgmt, pMsg);
-      default:
-        terrno = TSDB_CODE_MSG_NOT_PROCESSED;
-        return -1;
-    }
-  } else {
-    terrno = TSDB_CODE_MSG_NOT_PROCESSED;
-    return -1;
-  }
-}
-
-int32_t dndProcessDropNodeMsg(SDnode *pDnode, SNodeMsg *pMsg) {
-  SMgmtWrapper *pWrapper = dndGetWrapperFromMsg(pDnode, pMsg);
-  switch (pMsg->rpcMsg.msgType) {
+      return dndOpenNode(pDnode, MNODE);
     case TDMT_DND_DROP_MNODE:
-      return mmProcessDropReq(pWrapper->pMgmt, pMsg);
+      return dndCloseNode(pDnode, MNODE);
+    case TDMT_DND_CREATE_QNODE:
+      return dndOpenNode(pDnode, QNODE);
     case TDMT_DND_DROP_QNODE:
-      return qmProcessDropReq(pWrapper->pMgmt, pMsg);
+      return dndCloseNode(pDnode, QNODE);
+    case TDMT_DND_CREATE_SNODE:
+      return dndOpenNode(pDnode, SNODE);
     case TDMT_DND_DROP_SNODE:
-      return smProcessDropReq(pWrapper->pMgmt, pMsg);
+      return dndCloseNode(pDnode, MNODE);
+    case TDMT_DND_CREATE_BNODE:
+      return dndOpenNode(pDnode, BNODE);
     case TDMT_DND_DROP_BNODE:
-      return bmProcessDropReq(pWrapper->pMgmt, pMsg);
+      return dndCloseNode(pDnode, BNODE);
+
     default:
       terrno = TSDB_CODE_MSG_NOT_PROCESSED;
       return -1;
diff --git a/source/dnode/mgmt/container/src/dndObj.c b/source/dnode/mgmt/container/src/dndObj.c
index e148710c1b..e6681a446d 100644
--- a/source/dnode/mgmt/container/src/dndObj.c
+++ b/source/dnode/mgmt/container/src/dndObj.c
@@ -124,9 +124,8 @@ void dndClose(SDnode *pDnode) {
   dndCleanupServer(pDnode);
   dndCleanupClient(pDnode);
 
-  for (ENodeType n = 0; n < NODE_MAX; ++n) {
-    SMgmtWrapper *pWrapper = &pDnode->wrappers[n];
-    dndCloseNode(pWrapper);
+  for (ENodeType ntype = 0; ntype < NODE_MAX; ++ntype) {
+    (void)dndCloseNode(pDnode, ntype);
   }
 
   dndClearMemory(pDnode);
@@ -138,8 +137,8 @@ void dndHandleEvent(SDnode *pDnode, EDndEvent event) {
   pDnode->event = event;
 }
 
-SMgmtWrapper *dndAcquireWrapper(SDnode *pDnode, ENodeType nodeType) {
-  SMgmtWrapper *pWrapper = &pDnode->wrappers[nodeType];
+SMgmtWrapper *dndAcquireWrapper(SDnode *pDnode, ENodeType ntype) {
+  SMgmtWrapper *pWrapper = &pDnode->wrappers[ntype];
   SMgmtWrapper *pRetWrapper = pWrapper;
 
   taosRLockLatch(&pWrapper->latch);
@@ -155,6 +154,22 @@ SMgmtWrapper *dndAcquireWrapper(SDnode *pDnode, ENodeType nodeType) {
   return pRetWrapper;
 }
 
+int32_t dndMarkWrapper(SMgmtWrapper *pWrapper) {
+  int32_t code = 0;
+
+  taosRLockLatch(&pWrapper->latch);
+  if (pWrapper->deployed) {
+    int32_t refCount = atomic_add_fetch_32(&pWrapper->refCount, 1);
+    dTrace("node:%s, is marked, refCount:%d", pWrapper->name, refCount);
+  } else {
+    terrno = TSDB_CODE_NODE_NOT_DEPLOYED;
+    code = -1;
+  }
+  taosRUnLockLatch(&pWrapper->latch);
+
+  return code;
+}
+
 void dndReleaseWrapper(SMgmtWrapper *pWrapper) {
   if (pWrapper == NULL) return;
 
diff --git a/source/dnode/mgmt/dnode/src/dmWorker.c b/source/dnode/mgmt/dnode/src/dmWorker.c
index c135473d25..9f8e30e11b 100644
--- a/source/dnode/mgmt/dnode/src/dmWorker.c
+++ b/source/dnode/mgmt/dnode/src/dmWorker.c
@@ -63,13 +63,12 @@ static void dmProcessQueue(SDnodeMgmt *pMgmt, SNodeMsg *pMsg) {
     case TDMT_DND_CREATE_QNODE:
     case TDMT_DND_CREATE_SNODE:
     case TDMT_DND_CREATE_BNODE:
-      code = dndProcessCreateNodeMsg(pMgmt->pDnode, pMsg);
-
     case TDMT_DND_DROP_MNODE:
     case TDMT_DND_DROP_QNODE:
     case TDMT_DND_DROP_SNODE:
     case TDMT_DND_DROP_BNODE:
-      code = dndProcessDropNodeMsg(pMgmt->pDnode, pMsg);
+      code = dndProcessNodeMsg(pMgmt->pDnode, pMsg);
+      break;
     default:
       terrno = TSDB_CODE_MSG_NOT_PROCESSED;
       code = -1;