diff --git a/source/dnode/mgmt/container/inc/dndInt.h b/source/dnode/mgmt/container/inc/dndInt.h
index d10835b67f..8ea496b2fb 100644
--- a/source/dnode/mgmt/container/inc/dndInt.h
+++ b/source/dnode/mgmt/container/inc/dndInt.h
@@ -56,7 +56,6 @@ void    dndCleanupServer(SDnode *pDnode);
 int32_t dndInitClient(SDnode *pDnode);
 void    dndCleanupClient(SDnode *pDnode);
 int32_t dndInitMsgHandle(SDnode *pDnode);
-void    dndSendRpcRsp(SMgmtWrapper *pWrapper, SRpcMsg *pRsp);
 
 #ifdef __cplusplus
 }
diff --git a/source/dnode/mgmt/container/src/dndExec.c b/source/dnode/mgmt/container/src/dndExec.c
index 6d07ca1898..1355c4543a 100644
--- a/source/dnode/mgmt/container/src/dndExec.c
+++ b/source/dnode/mgmt/container/src/dndExec.c
@@ -138,7 +138,7 @@ static void dndConsumeChildQueue(SMgmtWrapper *pWrapper, SNodeMsg *pMsg, int32_t
 static void dndConsumeParentQueue(SMgmtWrapper *pWrapper, SRpcMsg *pRsp, int32_t msgLen, void *pCont, int32_t contLen) {
   dTrace("msg:%p, get from parent queue", pRsp);
   pRsp->pCont = pCont;
-  dndSendRpcRsp(pWrapper, pRsp);
+  dndSendRsp(pWrapper, pRsp);
   free(pRsp);
 }
 
diff --git a/source/dnode/mgmt/container/src/dndFile.c b/source/dnode/mgmt/container/src/dndFile.c
index a5f8fb7169..ab04040b57 100644
--- a/source/dnode/mgmt/container/src/dndFile.c
+++ b/source/dnode/mgmt/container/src/dndFile.c
@@ -16,14 +16,16 @@
 #define _DEFAULT_SOURCE
 #include "dndInt.h"
 
+#define MAXLEN 1024
+
 int32_t dndReadFile(SMgmtWrapper *pWrapper, bool *pDeployed) {
-  int32_t   code = TSDB_CODE_NODE_PARSE_FILE_ERROR;
-  int32_t   len = 0;
-  int32_t   maxLen = 1024;
-  char     *content = calloc(1, maxLen + 1);
-  cJSON    *root = NULL;
-  char      file[PATH_MAX];
-  TdFilePtr pFile = NULL;
+  int32_t       code = TSDB_CODE_NODE_PARSE_FILE_ERROR;
+  int32_t       len = 0;
+  const int32_t maxLen = MAXLEN;
+  char          content[MAXLEN + 1] = {0};
+  cJSON        *root = NULL;
+  char          file[PATH_MAX];
+  TdFilePtr     pFile = NULL;
 
   snprintf(file, sizeof(file), "%s%s%s.json", pWrapper->path, TD_DIRSEP, pWrapper->name);
   pFile = taosOpenFile(file, TD_FILE_READ);
@@ -57,7 +59,6 @@ int32_t dndReadFile(SMgmtWrapper *pWrapper, bool *pDeployed) {
   dDebug("succcessed to read file %s, deployed:%d", file, *pDeployed);
 
 _OVER:
-  if (content != NULL) free(content);
   if (root != NULL) cJSON_Delete(root);
   if (pFile != NULL) taosCloseFile(&pFile);
 
@@ -66,7 +67,7 @@ _OVER:
 }
 
 int32_t dndWriteFile(SMgmtWrapper *pWrapper, bool deployed) {
-  char file[PATH_MAX];
+  char file[PATH_MAX] = {0};
   snprintf(file, sizeof(file), "%s%s%s.json", pWrapper->path, TD_DIRSEP, pWrapper->name);
 
   TdFilePtr pFile = taosOpenFile(file, TD_FILE_CTEATE | TD_FILE_WRITE | TD_FILE_TRUNC);
@@ -76,9 +77,9 @@ int32_t dndWriteFile(SMgmtWrapper *pWrapper, bool deployed) {
     return -1;
   }
 
-  int32_t len = 0;
-  int32_t maxLen = 1024;
-  char   *content = calloc(1, maxLen + 1);
+  int32_t       len = 0;
+  const int32_t maxLen = MAXLEN;
+  char          content[MAXLEN + 1] = {0};
 
   len += snprintf(content + len, maxLen - len, "{\n");
   len += snprintf(content + len, maxLen - len, "  \"deployed\": %d\n", deployed);
@@ -87,9 +88,8 @@ int32_t dndWriteFile(SMgmtWrapper *pWrapper, bool deployed) {
   taosWriteFile(pFile, content, len);
   taosFsyncFile(pFile);
   taosCloseFile(&pFile);
-  free(content);
 
-  char realfile[PATH_MAX];
+  char realfile[PATH_MAX] = {0};
   snprintf(realfile, sizeof(realfile), "%s%s%s.json", pWrapper->path, TD_DIRSEP, pWrapper->name);
 
   if (taosRenameFile(file, realfile) != 0) {
diff --git a/source/dnode/mgmt/container/src/dndMsg.c b/source/dnode/mgmt/container/src/dndMsg.c
index 37ff4ebc05..bf3200ffaf 100644
--- a/source/dnode/mgmt/container/src/dndMsg.c
+++ b/source/dnode/mgmt/container/src/dndMsg.c
@@ -43,19 +43,18 @@ static inline int32_t dndBuildMsg(SNodeMsg *pMsg, SRpcMsg *pRpc) {
 
   memcpy(pMsg->user, connInfo.user, TSDB_USER_LEN);
   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) {
-    dndUpdateMnodeEpSet(pWrapper->pDnode, pEpSet);
-  }
-
   int32_t   code = -1;
   SNodeMsg *pMsg = NULL;
   NodeMsgFp msgFp = NULL;
 
+  if (pEpSet && pEpSet->numOfEps > 0 && pRpc->msgType == TDMT_MND_STATUS_RSP) {
+    dndUpdateMnodeEpSet(pWrapper->pDnode, pEpSet);
+  }
+
   if (dndMarkWrapper(pWrapper) != 0) goto _OVER;
   if ((msgFp = dndGetMsgFp(pWrapper, pRpc)) == NULL) goto _OVER;
   if ((pMsg = taosAllocateQitem(sizeof(SNodeMsg))) == NULL) goto _OVER;
@@ -67,6 +66,8 @@ void dndProcessRpcMsg(SMgmtWrapper *pWrapper, SRpcMsg *pRpc, SEpSet *pEpSet) {
   } else if (pWrapper->procType == PROC_PARENT) {
     code = taosProcPutToChildQueue(pWrapper->pProc, pMsg, sizeof(SNodeMsg), pRpc->pCont, pRpc->contLen);
   } else {
+    dFatal(" should not be entered in child processes");
+    ASSERT(1);
   }
 
 _OVER:
diff --git a/source/dnode/mgmt/container/src/dndTransport.c b/source/dnode/mgmt/container/src/dndTransport.c
index 4acb1f459e..b7d0cf26c0 100644
--- a/source/dnode/mgmt/container/src/dndTransport.c
+++ b/source/dnode/mgmt/container/src/dndTransport.c
@@ -348,7 +348,7 @@ int32_t dndSendReqToMnode(SMgmtWrapper *pWrapper, SRpcMsg *pReq) {
   }
 }
 
-void dndSendRpcRsp(SMgmtWrapper *pWrapper, SRpcMsg *pRsp) {
+static void dndSendRpcRsp(SMgmtWrapper *pWrapper, SRpcMsg *pRsp) {
   if (pRsp->code == TSDB_CODE_APP_NOT_READY) {
     SMgmtWrapper *pDnodeWrapper = dndAcquireWrapper(pWrapper->pDnode, DNODE);
     if (pDnodeWrapper != NULL) {