diff --git a/source/dnode/mgmt/mgmt_vnode/src/vmFile.c b/source/dnode/mgmt/mgmt_vnode/src/vmFile.c
index 613f3fb994..90f852eed1 100644
--- a/source/dnode/mgmt/mgmt_vnode/src/vmFile.c
+++ b/source/dnode/mgmt/mgmt_vnode/src/vmFile.c
@@ -32,8 +32,7 @@ SVnodeObj **vmGetVnodeListFromHash(SVnodeMgmt *pMgmt, int32_t *numOfVnodes) {
     if (pVnode && num < size) {
       int32_t refCount = atomic_add_fetch_32(&pVnode->refCount, 1);
       // dTrace("vgId:%d, acquire vnode, refCount:%d", pVnode->vgId, refCount);
-      pVnodes[num] = (*ppVnode);
-      num++;
+      pVnodes[num++] = (*ppVnode);
       pIter = taosHashIterate(pMgmt->hash, pIter);
     } else {
       taosHashCancelIterate(pMgmt->hash, pIter);
diff --git a/source/dnode/mgmt/mgmt_vnode/src/vmInt.c b/source/dnode/mgmt/mgmt_vnode/src/vmInt.c
index 681440dec4..23f7f63de8 100644
--- a/source/dnode/mgmt/mgmt_vnode/src/vmInt.c
+++ b/source/dnode/mgmt/mgmt_vnode/src/vmInt.c
@@ -88,7 +88,7 @@ void vmCloseVnode(SVnodeMgmt *pMgmt, SVnodeObj *pVnode) {
   while (!taosQueueEmpty(pVnode->pApplyQ)) taosMsleep(10);
   while (!taosQueueEmpty(pVnode->pQueryQ)) taosMsleep(10);
   while (!taosQueueEmpty(pVnode->pFetchQ)) taosMsleep(10);
-  dTrace("vgId:%d, vnode-fetch queue is empty", pVnode->vgId);
+  dTrace("vgId:%d, vnode queue is empty", pVnode->vgId);
 
   vmFreeQueue(pMgmt, pVnode);
   vnodeClose(pVnode->pImpl);
@@ -140,7 +140,7 @@ static void *vmOpenVnodeInThread(void *param) {
 }
 
 static int32_t vmOpenVnodes(SVnodeMgmt *pMgmt) {
-  pMgmt->hash = taosHashInit(TSDB_MIN_VNODES, taosGetDefaultHashFunction(TSDB_DATA_TYPE_INT), true, HASH_NO_LOCK);
+  pMgmt->hash = taosHashInit(TSDB_MIN_VNODES, taosGetDefaultHashFunction(TSDB_DATA_TYPE_INT), true, HASH_ENTRY_LOCK);
   if (pMgmt->hash == NULL) {
     terrno = TSDB_CODE_OUT_OF_MEMORY;
     dError("failed to init vnode hash since %s", terrstr());
@@ -156,7 +156,8 @@ static int32_t vmOpenVnodes(SVnodeMgmt *pMgmt) {
 
   pMgmt->state.totalVnodes = numOfVnodes;
 
-  int32_t threadNum = 1;
+  int32_t threadNum = tsNumOfCores / 2;
+  if (threadNum < 1) threadNum = 0;
   int32_t vnodesPerThread = numOfVnodes / threadNum + 1;
 
   SVnodeThread *threads = taosMemoryCalloc(threadNum, sizeof(SVnodeThread));
diff --git a/source/dnode/mgmt/mgmt_vnode/src/vmWorker.c b/source/dnode/mgmt/mgmt_vnode/src/vmWorker.c
index 6470e1a5a6..beefc502e7 100644
--- a/source/dnode/mgmt/mgmt_vnode/src/vmWorker.c
+++ b/source/dnode/mgmt/mgmt_vnode/src/vmWorker.c
@@ -185,7 +185,11 @@ int32_t vmPutMsgToMonitorQueue(SVnodeMgmt *pMgmt, SRpcMsg *pMsg) {
 
 int32_t vmPutRpcMsgToQueue(SVnodeMgmt *pMgmt, EQueueType qtype, SRpcMsg *pRpc) {
   SRpcMsg *pMsg = taosAllocateQitem(sizeof(SRpcMsg), RPC_QITEM);
-  if (pMsg == NULL) return -1;
+  if (pMsg == NULL) {
+    rpcFreeCont(pMsg->pCont);
+    pRpc->pCont = NULL;
+    return -1;
+  }
 
   SMsgHead *pHead = pRpc->pCont;
   dTrace("vgId:%d, msg:%p is created, type:%s", pHead->vgId, pMsg, TMSG_INFO(pRpc->msgType));
@@ -193,7 +197,16 @@ int32_t vmPutRpcMsgToQueue(SVnodeMgmt *pMgmt, EQueueType qtype, SRpcMsg *pRpc) {
   pHead->contLen = htonl(pHead->contLen);
   pHead->vgId = htonl(pHead->vgId);
   memcpy(pMsg, pRpc, sizeof(SRpcMsg));
-  return vmPutMsgToQueue(pMgmt, pMsg, qtype);
+
+  int32_t code = vmPutMsgToQueue(pMgmt, pMsg, qtype);
+  if (code != 0) {
+    dTrace("msg:%p, is freed", pMsg);
+    taosFreeQitem(pMsg);
+    rpcFreeCont(pMsg->pCont);
+    pRpc->pCont = NULL;
+  }
+
+  return code;
 }
 
 int32_t vmGetQueueSize(SVnodeMgmt *pMgmt, int32_t vgId, EQueueType qtype) {
diff --git a/source/dnode/mgmt/node_mgmt/src/dmTransport.c b/source/dnode/mgmt/node_mgmt/src/dmTransport.c
index df3c9c4e88..7043991525 100644
--- a/source/dnode/mgmt/node_mgmt/src/dmTransport.c
+++ b/source/dnode/mgmt/node_mgmt/src/dmTransport.c
@@ -71,9 +71,9 @@ int32_t dmProcessNodeMsg(SMgmtWrapper *pWrapper, SRpcMsg *pMsg) {
 }
 
 static void dmProcessRpcMsg(SDnode *pDnode, SRpcMsg *pRpc, SEpSet *pEpSet) {
-  SDnodeTrans * pTrans = &pDnode->trans;
+  SDnodeTrans  *pTrans = &pDnode->trans;
   int32_t       code = -1;
-  SRpcMsg *     pMsg = NULL;
+  SRpcMsg      *pMsg = NULL;
   SMgmtWrapper *pWrapper = NULL;
   SDnodeHandle *pHandle = &pTrans->msgHandles[TMSG_INDEX(pRpc->msgType)];
 
@@ -185,6 +185,7 @@ _OVER:
       taosFreeQitem(pMsg);
     }
     rpcFreeCont(pRpc->pCont);
+    pRpc->pCont = NULL;
   }
 
   dmReleaseWrapper(pWrapper);
@@ -195,11 +196,11 @@ int32_t dmInitMsgHandle(SDnode *pDnode) {
 
   for (EDndNodeType ntype = DNODE; ntype < NODE_END; ++ntype) {
     SMgmtWrapper *pWrapper = &pDnode->wrappers[ntype];
-    SArray *      pArray = (*pWrapper->func.getHandlesFp)();
+    SArray       *pArray = (*pWrapper->func.getHandlesFp)();
     if (pArray == NULL) return -1;
 
     for (int32_t i = 0; i < taosArrayGetSize(pArray); ++i) {
-      SMgmtHandle * pMgmt = taosArrayGet(pArray, i);
+      SMgmtHandle  *pMgmt = taosArrayGet(pArray, i);
       SDnodeHandle *pHandle = &pTrans->msgHandles[TMSG_INDEX(pMgmt->msgType)];
       if (pMgmt->needCheckVgId) {
         pHandle->needCheckVgId = pMgmt->needCheckVgId;