diff --git a/source/dnode/mgmt/impl/src/dndVnodes.c b/source/dnode/mgmt/impl/src/dndVnodes.c
index 5198e351abed1980f745f5398e627a0facbc3b57..9a6d3cb20b8474361440b12080f77707f25b34fe 100644
--- a/source/dnode/mgmt/impl/src/dndVnodes.c
+++ b/source/dnode/mgmt/impl/src/dndVnodes.c
@@ -165,6 +165,8 @@ static void dndCloseVnode(SDnode *pDnode, SVnodeObj *pVnode) {
   vnodeClose(pVnode->pImpl);
   pVnode->pImpl = NULL;
 
+  dDebug("vgId:%d, vnode is closed", pVnode->vgId);
+
   free(pVnode->path);
   free(pVnode->db);
   free(pVnode);
@@ -238,59 +240,57 @@ static int32_t dndGetVnodesFromFile(SDnode *pDnode, SWrapperCfg **ppCfgs, int32_
   }
 
   int32_t vnodesNum = cJSON_GetArraySize(vnodes);
-  if (vnodesNum <= 0) {
-    dError("failed to read %s since vnodes size:%d invalid", file, vnodesNum);
-    goto PRASE_VNODE_OVER;
-  }
+  if (vnodesNum > 0) {
+    pCfgs = calloc(vnodesNum, sizeof(SWrapperCfg));
+    if (pCfgs == NULL) {
+      dError("failed to read %s since out of memory", file);
+      goto PRASE_VNODE_OVER;
+    }
 
-  pCfgs = calloc(vnodesNum, sizeof(SWrapperCfg));
-  if (pCfgs == NULL) {
-    dError("failed to read %s since out of memory", file);
-    goto PRASE_VNODE_OVER;
-  }
+    for (int32_t i = 0; i < vnodesNum; ++i) {
+      cJSON       *vnode = cJSON_GetArrayItem(vnodes, i);
+      SWrapperCfg *pCfg = &pCfgs[i];
 
-  for (int32_t i = 0; i < vnodesNum; ++i) {
-    cJSON       *vnode = cJSON_GetArrayItem(vnodes, i);
-    SWrapperCfg *pCfg = &pCfgs[i];
+      cJSON *vgId = cJSON_GetObjectItem(vnode, "vgId");
+      if (!vgId || vgId->type != cJSON_Number) {
+        dError("failed to read %s since vgId not found", file);
+        goto PRASE_VNODE_OVER;
+      }
+      pCfg->vgId = vgId->valueint;
+      snprintf(pCfg->path, sizeof(pCfg->path), "%s/vnode%d", pDnode->dir.vnodes, pCfg->vgId);
 
-    cJSON *vgId = cJSON_GetObjectItem(vnode, "vgId");
-    if (!vgId || vgId->type != cJSON_Number) {
-      dError("failed to read %s since vgId not found", file);
-      goto PRASE_VNODE_OVER;
-    }
-    pCfg->vgId = vgId->valueint;
-    snprintf(pCfg->path, sizeof(pCfg->path), "%s/vnode%d", pDnode->dir.vnodes, pCfg->vgId);
+      cJSON *dropped = cJSON_GetObjectItem(vnode, "dropped");
+      if (!dropped || dropped->type != cJSON_Number) {
+        dError("failed to read %s since dropped not found", file);
+        goto PRASE_VNODE_OVER;
+      }
+      pCfg->dropped = dropped->valueint;
 
-    cJSON *dropped = cJSON_GetObjectItem(vnode, "dropped");
-    if (!dropped || dropped->type != cJSON_Number) {
-      dError("failed to read %s since dropped not found", file);
-      goto PRASE_VNODE_OVER;
-    }
-    pCfg->dropped = dropped->valueint;
+      cJSON *vgVersion = cJSON_GetObjectItem(vnode, "vgVersion");
+      if (!vgVersion || vgVersion->type != cJSON_Number) {
+        dError("failed to read %s since vgVersion not found", file);
+        goto PRASE_VNODE_OVER;
+      }
+      pCfg->vgVersion = vgVersion->valueint;
 
-    cJSON *vgVersion = cJSON_GetObjectItem(vnode, "vgVersion");
-    if (!vgVersion || vgVersion->type != cJSON_Number) {
-      dError("failed to read %s since vgVersion not found", file);
-      goto PRASE_VNODE_OVER;
-    }
-    pCfg->vgVersion = vgVersion->valueint;
+      cJSON *dbUid = cJSON_GetObjectItem(vnode, "dbUid");
+      if (!dbUid || dbUid->type != cJSON_String) {
+        dError("failed to read %s since dbUid not found", file);
+        goto PRASE_VNODE_OVER;
+      }
+      pCfg->dbUid = atoll(dbUid->valuestring);
 
-    cJSON *dbUid = cJSON_GetObjectItem(vnode, "dbUid");
-    if (!dbUid || dbUid->type != cJSON_String) {
-      dError("failed to read %s since dbUid not found", file);
-      goto PRASE_VNODE_OVER;
+      cJSON *db = cJSON_GetObjectItem(vnode, "db");
+      if (!db || db->type != cJSON_String) {
+        dError("failed to read %s since db not found", file);
+        goto PRASE_VNODE_OVER;
+      }
+      tstrncpy(pCfg->db, db->valuestring, TSDB_DB_FNAME_LEN);
     }
-    pCfg->dbUid = atoll(dbUid->valuestring);
 
-    cJSON *db = cJSON_GetObjectItem(vnode, "db");
-    if (!db || db->type != cJSON_String) {
-      dError("failed to read %s since db not found", file);
-      goto PRASE_VNODE_OVER;
-    }
-    tstrncpy(pCfg->db, db->valuestring, TSDB_DB_FNAME_LEN);
+    *ppCfgs = pCfgs;
   }
 
-  *ppCfgs = pCfgs;
   *numOfVnodes = vnodesNum;
   code = 0;
   dInfo("succcessed to read file %s", file);
@@ -548,13 +548,13 @@ static void dndGenerateWrapperCfg(SDnode *pDnode, SCreateVnodeReq *pCreate, SWra
   pCfg->vgVersion = pCreate->vgVersion;
 }
 
-static SDropVnodeReq *vnodeParseDropVnodeReq(SRpcMsg *pReq) {
+static SDropVnodeReq *dndParseDropVnodeReq(SRpcMsg *pReq) {
   SDropVnodeReq *pDrop = pReq->pCont;
   pDrop->vgId = htonl(pDrop->vgId);
   return pDrop;
 }
 
-static SAuthVnodeReq *vnodeParseAuthVnodeReq(SRpcMsg *pReq) {
+static SAuthVnodeReq *dndParseAuthVnodeReq(SRpcMsg *pReq) {
   SAuthVnodeReq *pAuth = pReq->pCont;
   pAuth->vgId = htonl(pAuth->vgId);
   return pAuth;
@@ -572,10 +572,10 @@ int32_t dndProcessCreateVnodeReq(SDnode *pDnode, SRpcMsg *pReq) {
 
   SVnodeObj *pVnode = dndAcquireVnode(pDnode, pCreate->vgId);
   if (pVnode != NULL) {
-    dDebug("vgId:%d, already exist, return success", pCreate->vgId);
+    dDebug("vgId:%d, already exist", pCreate->vgId);
     dndReleaseVnode(pDnode, pVnode);
     terrno = TSDB_CODE_DND_VNODE_ALREADY_DEPLOYED;
-    return 0;
+    return -1;
   }
 
   SVnode *pImpl = vnodeOpen(wrapperCfg.path, &vnodeCfg);
@@ -641,7 +641,7 @@ int32_t dndProcessAlterVnodeReq(SDnode *pDnode, SRpcMsg *pReq) {
 }
 
 int32_t dndProcessDropVnodeReq(SDnode *pDnode, SRpcMsg *pReq) {
-  SDropVnodeReq *pDrop = vnodeParseDropVnodeReq(pReq);
+  SDropVnodeReq *pDrop = dndParseDropVnodeReq(pReq);
 
   int32_t vgId = pDrop->vgId;
   dDebug("vgId:%d, drop vnode req is received", vgId);
@@ -649,7 +649,8 @@ int32_t dndProcessDropVnodeReq(SDnode *pDnode, SRpcMsg *pReq) {
   SVnodeObj *pVnode = dndAcquireVnode(pDnode, vgId);
   if (pVnode == NULL) {
     dDebug("vgId:%d, failed to drop since %s", vgId, terrstr());
-    return 0;
+    terrno = TSDB_CODE_DND_VNODE_NOT_DEPLOYED;
+    return -1;
   }
 
   pVnode->dropped = 1;
@@ -668,7 +669,7 @@ int32_t dndProcessDropVnodeReq(SDnode *pDnode, SRpcMsg *pReq) {
 }
 
 int32_t dndProcessAuthVnodeReq(SDnode *pDnode, SRpcMsg *pReq) {
-  SAuthVnodeReq *pAuth = (SAuthVnodeReq *)vnodeParseAuthVnodeReq(pReq);
+  SAuthVnodeReq *pAuth = (SAuthVnodeReq *)dndParseAuthVnodeReq(pReq);
 
   int32_t vgId = pAuth->vgId;
   dDebug("vgId:%d, auth vnode req is received", vgId);
@@ -685,7 +686,7 @@ int32_t dndProcessAuthVnodeReq(SDnode *pDnode, SRpcMsg *pReq) {
 }
 
 int32_t dndProcessSyncVnodeReq(SDnode *pDnode, SRpcMsg *pReq) {
-  SSyncVnodeReq *pSync = (SSyncVnodeReq *)vnodeParseDropVnodeReq(pReq);
+  SSyncVnodeReq *pSync = (SSyncVnodeReq *)dndParseDropVnodeReq(pReq);
 
   int32_t vgId = pSync->vgId;
   dDebug("vgId:%d, sync vnode req is received", vgId);
@@ -707,7 +708,7 @@ int32_t dndProcessSyncVnodeReq(SDnode *pDnode, SRpcMsg *pReq) {
 }
 
 int32_t dndProcessCompactVnodeReq(SDnode *pDnode, SRpcMsg *pReq) {
-  SCompactVnodeReq *pCompact = (SCompactVnodeReq *)vnodeParseDropVnodeReq(pReq);
+  SCompactVnodeReq *pCompact = (SCompactVnodeReq *)dndParseDropVnodeReq(pReq);
 
   int32_t vgId = pCompact->vgId;
   dDebug("vgId:%d, compact vnode req is received", vgId);
diff --git a/source/dnode/mgmt/impl/test/mnode/dmnode.cpp b/source/dnode/mgmt/impl/test/mnode/dmnode.cpp
index 841d00d14d24cfb7174f9c5f24fa49ba3b209d0a..edaecef49e4cf5d67603864a40d5477b8615e818 100644
--- a/source/dnode/mgmt/impl/test/mnode/dmnode.cpp
+++ b/source/dnode/mgmt/impl/test/mnode/dmnode.cpp
@@ -13,7 +13,7 @@
 
 class DndTestMnode : public ::testing::Test {
  protected:
-  static void SetUpTestSuite() { test.Init("/tmp/dnode_test_mnode", 9113); }
+  static void SetUpTestSuite() { test.Init("/tmp/dnode_test_mnode", 9114); }
   static void TearDownTestSuite() { test.Cleanup(); }
 
   static Testbase   test;
diff --git a/source/dnode/mgmt/impl/test/snode/dsnode.cpp b/source/dnode/mgmt/impl/test/snode/dsnode.cpp
index f51f4a02683f3c34b1ca8957ee2a720c2ae6a5d0..019aa1cbbc31c0379e6f2418f0e0b923031052df 100644
--- a/source/dnode/mgmt/impl/test/snode/dsnode.cpp
+++ b/source/dnode/mgmt/impl/test/snode/dsnode.cpp
@@ -13,7 +13,7 @@
 
 class DndTestSnode : public ::testing::Test {
  protected:
-  static void SetUpTestSuite() { test.Init("/tmp/dnode_test_snode", 9112); }
+  static void SetUpTestSuite() { test.Init("/tmp/dnode_test_snode", 9113); }
   static void TearDownTestSuite() { test.Cleanup(); }
 
   static Testbase test;
diff --git a/source/dnode/mgmt/impl/test/vnode/vnode.cpp b/source/dnode/mgmt/impl/test/vnode/vnode.cpp
index 72331371402fd88e6d6e3c80bae536468ac83a45..6b042c3ce62f5945a01c4741f9a57a7a447915ea 100644
--- a/source/dnode/mgmt/impl/test/vnode/vnode.cpp
+++ b/source/dnode/mgmt/impl/test/vnode/vnode.cpp
@@ -1,7 +1,7 @@
 /**
  * @file db.cpp
  * @author slguan (slguan@taosdata.com)
- * @brief DNODE module vgroup-msg tests
+ * @brief DNODE module vnode tests
  * @version 0.1
  * @date 2021-12-20
  *
@@ -13,7 +13,7 @@
 
 class DndTestVnode : public ::testing::Test {
  protected:
-  static void SetUpTestSuite() { test.Init("/tmp/dnode_test_vnode", 9150); }
+  static void SetUpTestSuite() { test.Init("/tmp/dnode_test_vnode", 9115); }
   static void TearDownTestSuite() { test.Cleanup(); }
 
   static Testbase test;
@@ -57,12 +57,17 @@ TEST_F(DndTestVnode, 01_Create_Restart_Drop_Vnode) {
       for (int r = 0; r < pReq->replica; ++r) {
         SReplica* pReplica = &pReq->replicas[r];
         pReplica->id = htonl(1);
-        pReplica->port = htons(9150);
+        pReplica->port = htons(9527);
       }
 
       SRpcMsg* pRsp = test.SendReq(TDMT_DND_CREATE_VNODE, pReq, contLen);
       ASSERT_NE(pRsp, nullptr);
-      ASSERT_EQ(pRsp->code, 0);
+      if (i == 0) {
+        ASSERT_EQ(pRsp->code, 0);
+        test.Restart();
+      } else {
+        ASSERT_EQ(pRsp->code, TSDB_CODE_DND_VNODE_ALREADY_DEPLOYED);
+      }
     }
   }
 
@@ -97,7 +102,7 @@ TEST_F(DndTestVnode, 01_Create_Restart_Drop_Vnode) {
       for (int r = 0; r < pReq->replica; ++r) {
         SReplica* pReplica = &pReq->replicas[r];
         pReplica->id = htonl(1);
-        pReplica->port = htons(9150);
+        pReplica->port = htons(9527);
       }
 
       SRpcMsg* pRsp = test.SendReq(TDMT_DND_ALTER_VNODE, pReq, contLen);
@@ -123,7 +128,12 @@ TEST_F(DndTestVnode, 01_Create_Restart_Drop_Vnode) {
 
       SRpcMsg* pRsp = test.SendReq(TDMT_DND_DROP_VNODE, pReq, contLen);
       ASSERT_NE(pRsp, nullptr);
-      ASSERT_EQ(pRsp->code, 0);
+      if (i == 0) {
+        ASSERT_EQ(pRsp->code, 0);
+        test.Restart();
+      } else {
+        ASSERT_EQ(pRsp->code, TSDB_CODE_DND_VNODE_NOT_DEPLOYED);
+      }
     }
   }
 }
diff --git a/source/dnode/mnode/impl/inc/mndVgroup.h b/source/dnode/mnode/impl/inc/mndVgroup.h
index 9e4656fec812a1d1c1a2c13ab6bc1f4870397e80..6ab11aa1b4051ac40869b86de7c988ea21dd3eaa 100644
--- a/source/dnode/mnode/impl/inc/mndVgroup.h
+++ b/source/dnode/mnode/impl/inc/mndVgroup.h
@@ -31,8 +31,8 @@ int32_t  mndAllocVgroup(SMnode *pMnode, SDbObj *pDb, SVgObj **ppVgroups);
 SEpSet   mndGetVgroupEpset(SMnode *pMnode, SVgObj *pVgroup);
 int32_t  mndGetVnodesNum(SMnode *pMnode, int32_t dnodeId);
 
-SCreateVnodeReq *mndBuildCreateVnodeMsg(SMnode *pMnode, SDnodeObj *pDnode, SDbObj *pDb, SVgObj *pVgroup);
-SDropVnodeReq   *mndBuildDropVnodeMsg(SMnode *pMnode, SDnodeObj *pDnode, SDbObj *pDb, SVgObj *pVgroup);
+SCreateVnodeReq *mndBuildCreateVnodeReq(SMnode *pMnode, SDnodeObj *pDnode, SDbObj *pDb, SVgObj *pVgroup);
+SDropVnodeReq   *mndBuildDropVnodeReq(SMnode *pMnode, SDnodeObj *pDnode, SDbObj *pDb, SVgObj *pVgroup);
 
 #ifdef __cplusplus
 }
diff --git a/source/dnode/mnode/impl/src/mndAcct.c b/source/dnode/mnode/impl/src/mndAcct.c
index 945a6523ef60e2d2161ccbab5677baf52b43c12e..aa87eb43a18a84e04bef9056d3fde8991daa6d2a 100644
--- a/source/dnode/mnode/impl/src/mndAcct.c
+++ b/source/dnode/mnode/impl/src/mndAcct.c
@@ -177,7 +177,7 @@ static int32_t mndAcctActionDelete(SSdb *pSdb, SAcctObj *pAcct) {
 }
 
 static int32_t mndAcctActionUpdate(SSdb *pSdb, SAcctObj *pOld, SAcctObj *pNew) {
-  mTrace("acct:%s, perform update action, old_row:%p new_row:%p", pOld->acct, pOld, pNew);
+  mTrace("acct:%s, perform update action, old row:%p new row:%p", pOld->acct, pOld, pNew);
 
   pOld->updateTime = pNew->updateTime;
   pOld->status = pNew->status;
diff --git a/source/dnode/mnode/impl/src/mndBnode.c b/source/dnode/mnode/impl/src/mndBnode.c
index 6325bbb6fd0c04591758605af9fccdea5ca9b97e..dbe925992defd419178f1d0628e78671e6a89c45 100644
--- a/source/dnode/mnode/impl/src/mndBnode.c
+++ b/source/dnode/mnode/impl/src/mndBnode.c
@@ -155,7 +155,7 @@ static int32_t mndBnodeActionDelete(SSdb *pSdb, SBnodeObj *pObj) {
 }
 
 static int32_t mndBnodeActionUpdate(SSdb *pSdb, SBnodeObj *pOld, SBnodeObj *pNew) {
-  mTrace("bnode:%d, perform update action, old_row:%p new_row:%p", pOld->id, pOld, pNew);
+  mTrace("bnode:%d, perform update action, old row:%p new row:%p", pOld->id, pOld, pNew);
   pOld->updateTime = pNew->updateTime;
   return 0;
 }
diff --git a/source/dnode/mnode/impl/src/mndCluster.c b/source/dnode/mnode/impl/src/mndCluster.c
index 8cb98a148fb1728c4e9d65a1069f19c1b601dfdf..92b9017627689d8167888018f90115a74241a722 100644
--- a/source/dnode/mnode/impl/src/mndCluster.c
+++ b/source/dnode/mnode/impl/src/mndCluster.c
@@ -135,7 +135,7 @@ static int32_t mndClusterActionDelete(SSdb *pSdb, SClusterObj *pCluster) {
 }
 
 static int32_t mndClusterActionUpdate(SSdb *pSdb, SClusterObj *pOld, SClusterObj *pNew) {
-  mTrace("cluster:%" PRId64 ", perform update action, old_row:%p new_row:%p", pOld->id, pOld, pNew);
+  mTrace("cluster:%" PRId64 ", perform update action, old row:%p new row:%p", pOld->id, pOld, pNew);
   return 0;
 }
 
diff --git a/source/dnode/mnode/impl/src/mndDb.c b/source/dnode/mnode/impl/src/mndDb.c
index bf5d01d0a261ef4d392c651e7ea1c969a6acd8a2..1a5ea53d3c3ae2b6dcd6c618af1274f32ed7031a 100644
--- a/source/dnode/mnode/impl/src/mndDb.c
+++ b/source/dnode/mnode/impl/src/mndDb.c
@@ -28,15 +28,15 @@ static SSdbRaw *mndDbActionEncode(SDbObj *pDb);
 static SSdbRow *mndDbActionDecode(SSdbRaw *pRaw);
 static int32_t  mndDbActionInsert(SSdb *pSdb, SDbObj *pDb);
 static int32_t  mndDbActionDelete(SSdb *pSdb, SDbObj *pDb);
-static int32_t  mndDbActionUpdate(SSdb *pSdb, SDbObj *pOldDb, SDbObj *pNewDb);
-static int32_t  mndProcessCreateDbMsg(SMnodeMsg *pMsg);
-static int32_t  mndProcessAlterDbMsg(SMnodeMsg *pMsg);
-static int32_t  mndProcessDropDbMsg(SMnodeMsg *pMsg);
-static int32_t  mndProcessUseDbMsg(SMnodeMsg *pMsg);
-static int32_t  mndProcessSyncDbMsg(SMnodeMsg *pMsg);
-static int32_t  mndProcessCompactDbMsg(SMnodeMsg *pMsg);
-static int32_t  mndGetDbMeta(SMnodeMsg *pMsg, SShowObj *pShow, STableMetaMsg *pMeta);
-static int32_t  mndRetrieveDbs(SMnodeMsg *pMsg, SShowObj *pShow, char *data, int32_t rows);
+static int32_t  mndDbActionUpdate(SSdb *pSdb, SDbObj *pOld, SDbObj *pNew);
+static int32_t  mndProcessCreateDbReq(SMnodeMsg *pReq);
+static int32_t  mndProcessAlterDbReq(SMnodeMsg *pReq);
+static int32_t  mndProcessDropDbReq(SMnodeMsg *pReq);
+static int32_t  mndProcessUseDbReq(SMnodeMsg *pReq);
+static int32_t  mndProcessSyncDbReq(SMnodeMsg *pReq);
+static int32_t  mndProcessCompactDbReq(SMnodeMsg *pReq);
+static int32_t  mndGetDbMeta(SMnodeMsg *pReq, SShowObj *pShow, STableMetaMsg *pMeta);
+static int32_t  mndRetrieveDbs(SMnodeMsg *pReq, SShowObj *pShow, char *data, int32_t rows);
 static void     mndCancelGetNextDb(SMnode *pMnode, void *pIter);
 
 int32_t mndInitDb(SMnode *pMnode) {
@@ -48,12 +48,12 @@ int32_t mndInitDb(SMnode *pMnode) {
                      .updateFp = (SdbUpdateFp)mndDbActionUpdate,
                      .deleteFp = (SdbDeleteFp)mndDbActionDelete};
 
-  mndSetMsgHandle(pMnode, TDMT_MND_CREATE_DB, mndProcessCreateDbMsg);
-  mndSetMsgHandle(pMnode, TDMT_MND_ALTER_DB, mndProcessAlterDbMsg);
-  mndSetMsgHandle(pMnode, TDMT_MND_DROP_DB, mndProcessDropDbMsg);
-  mndSetMsgHandle(pMnode, TDMT_MND_USE_DB, mndProcessUseDbMsg);
-  mndSetMsgHandle(pMnode, TDMT_MND_SYNC_DB, mndProcessSyncDbMsg);
-  mndSetMsgHandle(pMnode, TDMT_MND_COMPACT_DB, mndProcessCompactDbMsg);
+  mndSetMsgHandle(pMnode, TDMT_MND_CREATE_DB, mndProcessCreateDbReq);
+  mndSetMsgHandle(pMnode, TDMT_MND_ALTER_DB, mndProcessAlterDbReq);
+  mndSetMsgHandle(pMnode, TDMT_MND_DROP_DB, mndProcessDropDbReq);
+  mndSetMsgHandle(pMnode, TDMT_MND_USE_DB, mndProcessUseDbReq);
+  mndSetMsgHandle(pMnode, TDMT_MND_SYNC_DB, mndProcessSyncDbReq);
+  mndSetMsgHandle(pMnode, TDMT_MND_COMPACT_DB, mndProcessCompactDbReq);
 
   mndAddShowMetaHandle(pMnode, TSDB_MGMT_TABLE_DB, mndGetDbMeta);
   mndAddShowRetrieveHandle(pMnode, TSDB_MGMT_TABLE_DB, mndRetrieveDbs);
@@ -182,12 +182,12 @@ static int32_t mndDbActionDelete(SSdb *pSdb, SDbObj *pDb) {
   return 0;
 }
 
-static int32_t mndDbActionUpdate(SSdb *pSdb, SDbObj *pOldDb, SDbObj *pNewDb) {
-  mTrace("db:%s, perform update action, old_row:%p new_row:%p", pOldDb->name, pOldDb, pNewDb);
-  pOldDb->updateTime = pNewDb->updateTime;
-  pOldDb->cfgVersion = pNewDb->cfgVersion;
-  pOldDb->vgVersion = pNewDb->vgVersion;
-  memcpy(&pOldDb->cfg, &pNewDb->cfg, sizeof(SDbCfg));
+static int32_t mndDbActionUpdate(SSdb *pSdb, SDbObj *pOld, SDbObj *pNew) {
+  mTrace("db:%s, perform update action, old row:%p new row:%p", pOld->name, pOld, pNew);
+  pOld->updateTime = pNew->updateTime;
+  pOld->cfgVersion = pNew->cfgVersion;
+  pOld->vgVersion = pNew->vgVersion;
+  memcpy(&pOld->cfg, &pNew->cfg, sizeof(SDbCfg));
   return 0;
 }
 
@@ -331,14 +331,15 @@ static int32_t mndSetCreateDbRedoActions(SMnode *pMnode, STrans *pTrans, SDbObj
       action.epSet = mndGetDnodeEpset(pDnode);
       mndReleaseDnode(pMnode, pDnode);
 
-      SCreateVnodeReq *pMsg = mndBuildCreateVnodeMsg(pMnode, pDnode, pDb, pVgroup);
-      if (pMsg == NULL) return -1;
+      SCreateVnodeReq *pReq = mndBuildCreateVnodeReq(pMnode, pDnode, pDb, pVgroup);
+      if (pReq == NULL) return -1;
 
-      action.pCont = pMsg;
+      action.pCont = pReq;
       action.contLen = sizeof(SCreateVnodeReq);
       action.msgType = TDMT_DND_CREATE_VNODE;
+      action.acceptableCode = TSDB_CODE_DND_VNODE_ALREADY_DEPLOYED;
       if (mndTransAppendRedoAction(pTrans, &action) != 0) {
-        free(pMsg);
+        free(pReq);
         return -1;
       }
     }
@@ -360,14 +361,15 @@ static int32_t mndSetCreateDbUndoActions(SMnode *pMnode, STrans *pTrans, SDbObj
       action.epSet = mndGetDnodeEpset(pDnode);
       mndReleaseDnode(pMnode, pDnode);
 
-      SDropVnodeReq *pMsg = mndBuildDropVnodeMsg(pMnode, pDnode, pDb, pVgroup);
-      if (pMsg == NULL) return -1;
+      SDropVnodeReq *pReq = mndBuildDropVnodeReq(pMnode, pDnode, pDb, pVgroup);
+      if (pReq == NULL) return -1;
 
-      action.pCont = pMsg;
+      action.pCont = pReq;
       action.contLen = sizeof(SDropVnodeReq);
       action.msgType = TDMT_DND_DROP_VNODE;
+       action.acceptableCode = TSDB_CODE_DND_VNODE_NOT_DEPLOYED;
       if (mndTransAppendUndoAction(pTrans, &action) != 0) {
-        free(pMsg);
+        free(pReq);
         return -1;
       }
     }
@@ -376,7 +378,7 @@ static int32_t mndSetCreateDbUndoActions(SMnode *pMnode, STrans *pTrans, SDbObj
   return 0;
 }
 
-static int32_t mndCreateDb(SMnode *pMnode, SMnodeMsg *pMsg, SCreateDbMsg *pCreate, SUserObj *pUser) {
+static int32_t mndCreateDb(SMnode *pMnode, SMnodeMsg *pReq, SCreateDbMsg *pCreate, SUserObj *pUser) {
   SDbObj dbObj = {0};
   memcpy(dbObj.name, pCreate->db, TSDB_DB_FNAME_LEN);
   memcpy(dbObj.acct, pUser->acct, TSDB_USER_LEN);
@@ -425,43 +427,17 @@ static int32_t mndCreateDb(SMnode *pMnode, SMnodeMsg *pMsg, SCreateDbMsg *pCreat
   }
 
   int32_t code = -1;
-  STrans *pTrans = mndTransCreate(pMnode, TRN_POLICY_ROLLBACK, &pMsg->rpcMsg);
-  if (pTrans == NULL) {
-    mError("db:%s, failed to create since %s", pCreate->db, terrstr());
-    goto CREATE_DB_OVER;
-  }
+  STrans *pTrans = mndTransCreate(pMnode, TRN_POLICY_ROLLBACK, &pReq->rpcMsg);
+  if (pTrans == NULL) goto CREATE_DB_OVER;
 
   mDebug("trans:%d, used to create db:%s", pTrans->id, pCreate->db);
 
-  if (mndSetCreateDbRedoLogs(pMnode, pTrans, &dbObj, pVgroups) != 0) {
-    mError("trans:%d, failed to set redo log since %s", pTrans->id, terrstr());
-    goto CREATE_DB_OVER;
-  }
-
-  if (mndSetCreateDbUndoLogs(pMnode, pTrans, &dbObj, pVgroups) != 0) {
-    mError("trans:%d, failed to set undo log since %s", pTrans->id, terrstr());
-    goto CREATE_DB_OVER;
-  }
-
-  if (mndSetCreateDbCommitLogs(pMnode, pTrans, &dbObj, pVgroups) != 0) {
-    mError("trans:%d, failed to set commit log since %s", pTrans->id, terrstr());
-    goto CREATE_DB_OVER;
-  }
-
-  if (mndSetCreateDbRedoActions(pMnode, pTrans, &dbObj, pVgroups) != 0) {
-    mError("trans:%d, failed to set redo actions since %s", pTrans->id, terrstr());
-    goto CREATE_DB_OVER;
-  }
-
-  if (mndSetCreateDbUndoActions(pMnode, pTrans, &dbObj, pVgroups) != 0) {
-    mError("trans:%d, failed to set redo actions since %s", pTrans->id, terrstr());
-    goto CREATE_DB_OVER;
-  }
-
-  if (mndTransPrepare(pMnode, pTrans) != 0) {
-    mError("trans:%d, failed to prepare since %s", pTrans->id, terrstr());
-    goto CREATE_DB_OVER;
-  }
+  if (mndSetCreateDbRedoLogs(pMnode, pTrans, &dbObj, pVgroups) != 0) goto CREATE_DB_OVER;
+  if (mndSetCreateDbUndoLogs(pMnode, pTrans, &dbObj, pVgroups) != 0) goto CREATE_DB_OVER;
+  if (mndSetCreateDbCommitLogs(pMnode, pTrans, &dbObj, pVgroups) != 0) goto CREATE_DB_OVER;
+  if (mndSetCreateDbRedoActions(pMnode, pTrans, &dbObj, pVgroups) != 0) goto CREATE_DB_OVER;
+  if (mndSetCreateDbUndoActions(pMnode, pTrans, &dbObj, pVgroups) != 0) goto CREATE_DB_OVER;
+  if (mndTransPrepare(pMnode, pTrans) != 0) goto CREATE_DB_OVER;
 
   code = 0;
 
@@ -471,9 +447,9 @@ CREATE_DB_OVER:
   return code;
 }
 
-static int32_t mndProcessCreateDbMsg(SMnodeMsg *pMsg) {
-  SMnode       *pMnode = pMsg->pMnode;
-  SCreateDbMsg *pCreate = pMsg->rpcMsg.pCont;
+static int32_t mndProcessCreateDbReq(SMnodeMsg *pReq) {
+  SMnode       *pMnode = pReq->pMnode;
+  SCreateDbMsg *pCreate = pReq->rpcMsg.pCont;
 
   pCreate->numOfVgroups = htonl(pCreate->numOfVgroups);
   pCreate->cacheBlockSize = htonl(pCreate->cacheBlockSize);
@@ -502,13 +478,13 @@ static int32_t mndProcessCreateDbMsg(SMnodeMsg *pMsg) {
     }
   }
 
-  SUserObj *pOperUser = mndAcquireUser(pMnode, pMsg->user);
+  SUserObj *pOperUser = mndAcquireUser(pMnode, pReq->user);
   if (pOperUser == NULL) {
     mError("db:%s, failed to create since %s", pCreate->db, terrstr());
     return -1;
   }
 
-  int32_t code = mndCreateDb(pMnode, pMsg, pCreate, pOperUser);
+  int32_t code = mndCreateDb(pMnode, pReq, pCreate, pOperUser);
   mndReleaseUser(pMnode, pOperUser);
 
   if (code != 0) {
@@ -565,8 +541,8 @@ static int32_t mndSetDbCfgFromAlterDbMsg(SDbObj *pDb, SAlterDbMsg *pAlter) {
   return terrno;
 }
 
-static int32_t mndSetUpdateDbRedoLogs(SMnode *pMnode, STrans *pTrans, SDbObj *pOldDb, SDbObj *pNewDb) {
-  SSdbRaw *pRedoRaw = mndDbActionEncode(pOldDb);
+static int32_t mndSetUpdateDbRedoLogs(SMnode *pMnode, STrans *pTrans, SDbObj *pOld, SDbObj *pNew) {
+  SSdbRaw *pRedoRaw = mndDbActionEncode(pOld);
   if (pRedoRaw == NULL) return -1;
   if (mndTransAppendRedolog(pTrans, pRedoRaw) != 0) return -1;
   if (sdbSetRawStatus(pRedoRaw, SDB_STATUS_UPDATING) != 0) return -1;
@@ -574,8 +550,8 @@ static int32_t mndSetUpdateDbRedoLogs(SMnode *pMnode, STrans *pTrans, SDbObj *pO
   return 0;
 }
 
-static int32_t mndSetUpdateDbCommitLogs(SMnode *pMnode, STrans *pTrans, SDbObj *pOldDb, SDbObj *pNewDb) {
-  SSdbRaw *pCommitRaw = mndDbActionEncode(pNewDb);
+static int32_t mndSetUpdateDbCommitLogs(SMnode *pMnode, STrans *pTrans, SDbObj *pOld, SDbObj *pNew) {
+  SSdbRaw *pCommitRaw = mndDbActionEncode(pNew);
   if (pCommitRaw == NULL) return -1;
   if (mndTransAppendCommitlog(pTrans, pCommitRaw) != 0) return -1;
   if (sdbSetRawStatus(pCommitRaw, SDB_STATUS_READY) != 0) return -1;
@@ -593,14 +569,14 @@ static int32_t mndBuildUpdateVgroupAction(SMnode *pMnode, STrans *pTrans, SDbObj
     action.epSet = mndGetDnodeEpset(pDnode);
     mndReleaseDnode(pMnode, pDnode);
 
-    SAlterVnodeReq *pMsg = (SAlterVnodeReq *)mndBuildCreateVnodeMsg(pMnode, pDnode, pDb, pVgroup);
-    if (pMsg == NULL) return -1;
+    SAlterVnodeReq *pReq = (SAlterVnodeReq *)mndBuildCreateVnodeReq(pMnode, pDnode, pDb, pVgroup);
+    if (pReq == NULL) return -1;
 
-    action.pCont = pMsg;
+    action.pCont = pReq;
     action.contLen = sizeof(SAlterVnodeReq);
     action.msgType = TDMT_DND_ALTER_VNODE;
     if (mndTransAppendRedoAction(pTrans, &action) != 0) {
-      free(pMsg);
+      free(pReq);
       return -1;
     }
   }
@@ -608,7 +584,7 @@ static int32_t mndBuildUpdateVgroupAction(SMnode *pMnode, STrans *pTrans, SDbObj
   return 0;
 }
 
-static int32_t mndSetUpdateDbRedoActions(SMnode *pMnode, STrans *pTrans, SDbObj *pOldDb, SDbObj *pNewDb) {
+static int32_t mndSetUpdateDbRedoActions(SMnode *pMnode, STrans *pTrans, SDbObj *pOld, SDbObj *pNew) {
   SSdb *pSdb = pMnode->pSdb;
   void *pIter = NULL;
 
@@ -617,8 +593,8 @@ static int32_t mndSetUpdateDbRedoActions(SMnode *pMnode, STrans *pTrans, SDbObj
     pIter = sdbFetch(pSdb, SDB_VGROUP, pIter, (void **)&pVgroup);
     if (pIter == NULL) break;
 
-    if (pVgroup->dbUid == pNewDb->uid) {
-      if (mndBuildUpdateVgroupAction(pMnode, pTrans, pNewDb, pVgroup) != 0) {
+    if (pVgroup->dbUid == pNew->uid) {
+      if (mndBuildUpdateVgroupAction(pMnode, pTrans, pNew, pVgroup) != 0) {
         sdbCancelFetch(pSdb, pIter);
         sdbRelease(pSdb, pVgroup);
         return -1;
@@ -631,27 +607,27 @@ static int32_t mndSetUpdateDbRedoActions(SMnode *pMnode, STrans *pTrans, SDbObj
   return 0;
 }
 
-static int32_t mndUpdateDb(SMnode *pMnode, SMnodeMsg *pMsg, SDbObj *pOldDb, SDbObj *pNewDb) {
+static int32_t mndUpdateDb(SMnode *pMnode, SMnodeMsg *pReq, SDbObj *pOld, SDbObj *pNew) {
   int32_t code = -1;
-  STrans *pTrans = mndTransCreate(pMnode, TRN_POLICY_RETRY, &pMsg->rpcMsg);
+  STrans *pTrans = mndTransCreate(pMnode, TRN_POLICY_RETRY, &pReq->rpcMsg);
   if (pTrans == NULL) {
-    mError("db:%s, failed to update since %s", pOldDb->name, terrstr());
+    mError("db:%s, failed to update since %s", pOld->name, terrstr());
     return terrno;
   }
 
-  mDebug("trans:%d, used to update db:%s", pTrans->id, pOldDb->name);
+  mDebug("trans:%d, used to update db:%s", pTrans->id, pOld->name);
 
-  if (mndSetUpdateDbRedoLogs(pMnode, pTrans, pOldDb, pNewDb) != 0) {
+  if (mndSetUpdateDbRedoLogs(pMnode, pTrans, pOld, pNew) != 0) {
     mError("trans:%d, failed to set redo log since %s", pTrans->id, terrstr());
     goto UPDATE_DB_OVER;
   }
 
-  if (mndSetUpdateDbCommitLogs(pMnode, pTrans, pOldDb, pNewDb) != 0) {
+  if (mndSetUpdateDbCommitLogs(pMnode, pTrans, pOld, pNew) != 0) {
     mError("trans:%d, failed to set commit log since %s", pTrans->id, terrstr());
     goto UPDATE_DB_OVER;
   }
 
-  if (mndSetUpdateDbRedoActions(pMnode, pTrans, pOldDb, pNewDb) != 0) {
+  if (mndSetUpdateDbRedoActions(pMnode, pTrans, pOld, pNew) != 0) {
     mError("trans:%d, failed to set redo actions since %s", pTrans->id, terrstr());
     goto UPDATE_DB_OVER;
   }
@@ -668,9 +644,9 @@ UPDATE_DB_OVER:
   return code;
 }
 
-static int32_t mndProcessAlterDbMsg(SMnodeMsg *pMsg) {
-  SMnode      *pMnode = pMsg->pMnode;
-  SAlterDbMsg *pAlter = pMsg->rpcMsg.pCont;
+static int32_t mndProcessAlterDbReq(SMnodeMsg *pReq) {
+  SMnode      *pMnode = pReq->pMnode;
+  SAlterDbMsg *pAlter = pReq->rpcMsg.pCont;
   pAlter->totalBlocks = htonl(pAlter->totalBlocks);
   pAlter->daysToKeep0 = htonl(pAlter->daysToKeep0);
   pAlter->daysToKeep1 = htonl(pAlter->daysToKeep1);
@@ -697,7 +673,7 @@ static int32_t mndProcessAlterDbMsg(SMnodeMsg *pMsg) {
 
   dbObj.cfgVersion++;
   dbObj.updateTime = taosGetTimestampMs();
-  code = mndUpdateDb(pMnode, pMsg, pDb, &dbObj);
+  code = mndUpdateDb(pMnode, pReq, pDb, &dbObj);
   mndReleaseDb(pMnode, pDb);
 
   if (code != 0) {
@@ -757,14 +733,15 @@ static int32_t mndBuildDropVgroupAction(SMnode *pMnode, STrans *pTrans, SDbObj *
     action.epSet = mndGetDnodeEpset(pDnode);
     mndReleaseDnode(pMnode, pDnode);
 
-    SDropVnodeReq *pMsg = mndBuildDropVnodeMsg(pMnode, pDnode, pDb, pVgroup);
-    if (pMsg == NULL) return -1;
+    SDropVnodeReq *pReq = mndBuildDropVnodeReq(pMnode, pDnode, pDb, pVgroup);
+    if (pReq == NULL) return -1;
 
-    action.pCont = pMsg;
+    action.pCont = pReq;
     action.contLen = sizeof(SCreateVnodeReq);
     action.msgType = TDMT_DND_DROP_VNODE;
+    action.acceptableCode = TSDB_CODE_DND_VNODE_NOT_DEPLOYED;
     if (mndTransAppendRedoAction(pTrans, &action) != 0) {
-      free(pMsg);
+      free(pReq);
       return -1;
     }
   }
@@ -795,35 +772,17 @@ static int32_t mndSetDropDbRedoActions(SMnode *pMnode, STrans *pTrans, SDbObj *p
   return 0;
 }
 
-static int32_t mndDropDb(SMnode *pMnode, SMnodeMsg *pMsg, SDbObj *pDb) {
+static int32_t mndDropDb(SMnode *pMnode, SMnodeMsg *pReq, SDbObj *pDb) {
   int32_t code = -1;
-  STrans *pTrans = mndTransCreate(pMnode, TRN_POLICY_RETRY, &pMsg->rpcMsg);
-  if (pTrans == NULL) {
-    mError("db:%s, failed to drop since %s", pDb->name, terrstr());
-    return -1;
-  }
+  STrans *pTrans = mndTransCreate(pMnode, TRN_POLICY_RETRY, &pReq->rpcMsg);
+  if (pTrans == NULL) goto DROP_DB_OVER;
 
   mDebug("trans:%d, used to drop db:%s", pTrans->id, pDb->name);
 
-  if (mndSetDropDbRedoLogs(pMnode, pTrans, pDb) != 0) {
-    mError("trans:%d, failed to set redo log since %s", pTrans->id, terrstr());
-    goto DROP_DB_OVER;
-  }
-
-  if (mndSetDropDbCommitLogs(pMnode, pTrans, pDb) != 0) {
-    mError("trans:%d, failed to set commit log since %s", pTrans->id, terrstr());
-    goto DROP_DB_OVER;
-  }
-
-  if (mndSetDropDbRedoActions(pMnode, pTrans, pDb) != 0) {
-    mError("trans:%d, failed to set redo actions since %s", pTrans->id, terrstr());
-    goto DROP_DB_OVER;
-  }
-
-  if (mndTransPrepare(pMnode, pTrans) != 0) {
-    mError("trans:%d, failed to prepare since %s", pTrans->id, terrstr());
-    goto DROP_DB_OVER;
-  }
+  if (mndSetDropDbRedoLogs(pMnode, pTrans, pDb) != 0) goto DROP_DB_OVER;
+  if (mndSetDropDbCommitLogs(pMnode, pTrans, pDb) != 0) goto DROP_DB_OVER;
+  if (mndSetDropDbRedoActions(pMnode, pTrans, pDb) != 0) goto DROP_DB_OVER;
+  if (mndTransPrepare(pMnode, pTrans) != 0) goto DROP_DB_OVER;
 
   code = 0;
 
@@ -832,9 +791,9 @@ DROP_DB_OVER:
   return code;
 }
 
-static int32_t mndProcessDropDbMsg(SMnodeMsg *pMsg) {
-  SMnode     *pMnode = pMsg->pMnode;
-  SDropDbMsg *pDrop = pMsg->rpcMsg.pCont;
+static int32_t mndProcessDropDbReq(SMnodeMsg *pReq) {
+  SMnode     *pMnode = pReq->pMnode;
+  SDropDbMsg *pDrop = pReq->rpcMsg.pCont;
 
   mDebug("db:%s, start to drop", pDrop->db);
 
@@ -850,7 +809,7 @@ static int32_t mndProcessDropDbMsg(SMnodeMsg *pMsg) {
     }
   }
 
-  int32_t code = mndDropDb(pMnode, pMsg, pDb);
+  int32_t code = mndDropDb(pMnode, pReq, pDb);
   mndReleaseDb(pMnode, pDb);
 
   if (code != 0) {
@@ -861,16 +820,16 @@ static int32_t mndProcessDropDbMsg(SMnodeMsg *pMsg) {
   return TSDB_CODE_MND_ACTION_IN_PROGRESS;
 }
 
-static int32_t mndProcessUseDbMsg(SMnodeMsg *pMsg) {
-  SMnode    *pMnode = pMsg->pMnode;
+static int32_t mndProcessUseDbReq(SMnodeMsg *pReq) {
+  SMnode    *pMnode = pReq->pMnode;
   SSdb      *pSdb = pMnode->pSdb;
-  SUseDbMsg *pUse = pMsg->rpcMsg.pCont;
+  SUseDbMsg *pUse = pReq->rpcMsg.pCont;
   pUse->vgVersion = htonl(pUse->vgVersion);
 
   SDbObj *pDb = mndAcquireDb(pMnode, pUse->db);
   if (pDb == NULL) {
     terrno = TSDB_CODE_MND_DB_NOT_EXIST;
-    mError("db:%s, failed to process use db msg since %s", pUse->db, terrstr());
+    mError("db:%s, failed to process use db req since %s", pUse->db, terrstr());
     return -1;
   }
 
@@ -922,19 +881,19 @@ static int32_t mndProcessUseDbMsg(SMnodeMsg *pMsg) {
   pRsp->vgNum = htonl(vindex);
   pRsp->hashMethod = pDb->hashMethod;
 
-  pMsg->pCont = pRsp;
-  pMsg->contLen = contLen;
+  pReq->pCont = pRsp;
+  pReq->contLen = contLen;
   mndReleaseDb(pMnode, pDb);
 
   return 0;
 }
 
-static int32_t mndProcessSyncDbMsg(SMnodeMsg *pMsg) {
-  SMnode     *pMnode = pMsg->pMnode;
-  SSyncDbMsg *pSync = pMsg->rpcMsg.pCont;
+static int32_t mndProcessSyncDbReq(SMnodeMsg *pReq) {
+  SMnode     *pMnode = pReq->pMnode;
+  SSyncDbMsg *pSync = pReq->rpcMsg.pCont;
   SDbObj     *pDb = mndAcquireDb(pMnode, pSync->db);
   if (pDb == NULL) {
-    mError("db:%s, failed to process sync db msg since %s", pSync->db, terrstr());
+    mError("db:%s, failed to process sync db req since %s", pSync->db, terrstr());
     return -1;
   }
 
@@ -942,12 +901,12 @@ static int32_t mndProcessSyncDbMsg(SMnodeMsg *pMsg) {
   return 0;
 }
 
-static int32_t mndProcessCompactDbMsg(SMnodeMsg *pMsg) {
-  SMnode        *pMnode = pMsg->pMnode;
-  SCompactDbMsg *pCompact = pMsg->rpcMsg.pCont;
+static int32_t mndProcessCompactDbReq(SMnodeMsg *pReq) {
+  SMnode        *pMnode = pReq->pMnode;
+  SCompactDbMsg *pCompact = pReq->rpcMsg.pCont;
   SDbObj        *pDb = mndAcquireDb(pMnode, pCompact->db);
   if (pDb == NULL) {
-    mError("db:%s, failed to process compact db msg since %s", pCompact->db, terrstr());
+    mError("db:%s, failed to process compact db req since %s", pCompact->db, terrstr());
     return -1;
   }
 
@@ -955,8 +914,8 @@ static int32_t mndProcessCompactDbMsg(SMnodeMsg *pMsg) {
   return 0;
 }
 
-static int32_t mndGetDbMeta(SMnodeMsg *pMsg, SShowObj *pShow, STableMetaMsg *pMeta) {
-  SMnode *pMnode = pMsg->pMnode;
+static int32_t mndGetDbMeta(SMnodeMsg *pReq, SShowObj *pShow, STableMetaMsg *pMeta) {
+  SMnode *pMnode = pReq->pMnode;
   SSdb   *pSdb = pMnode->pSdb;
 
   int32_t  cols = 0;
@@ -1096,8 +1055,8 @@ char *mnGetDbStr(char *src) {
   return pos;
 }
 
-static int32_t mndRetrieveDbs(SMnodeMsg *pMsg, SShowObj *pShow, char *data, int32_t rows) {
-  SMnode *pMnode = pMsg->pMnode;
+static int32_t mndRetrieveDbs(SMnodeMsg *pReq, SShowObj *pShow, char *data, int32_t rows) {
+  SMnode *pMnode = pReq->pMnode;
   SSdb   *pSdb = pMnode->pSdb;
   int32_t numOfRows = 0;
   SDbObj *pDb = NULL;
diff --git a/source/dnode/mnode/impl/src/mndDnode.c b/source/dnode/mnode/impl/src/mndDnode.c
index d94078cfe1a7c009d2f533d754da83705edf40a5..1b62a47c917f77014e342b27360390f1b6f66f85 100644
--- a/source/dnode/mnode/impl/src/mndDnode.c
+++ b/source/dnode/mnode/impl/src/mndDnode.c
@@ -183,7 +183,7 @@ static int32_t mndDnodeActionDelete(SSdb *pSdb, SDnodeObj *pDnode) {
 }
 
 static int32_t mndDnodeActionUpdate(SSdb *pSdb, SDnodeObj *pOld, SDnodeObj *pNew) {
-  mTrace("dnode:%d, perform update action, old_row:%p new_row:%p", pOld->id, pOld, pNew);
+  mTrace("dnode:%d, perform update action, old row:%p new row:%p", pOld->id, pOld, pNew);
   pOld->updateTime = pNew->updateTime;
   return 0;
 }
diff --git a/source/dnode/mnode/impl/src/mndFunc.c b/source/dnode/mnode/impl/src/mndFunc.c
index f7a39ce9e5f82fb03f4a0a09b8c9eb7063e8b874..1c809a9b9a06a7590e000108cf4288576a286ee8 100644
--- a/source/dnode/mnode/impl/src/mndFunc.c
+++ b/source/dnode/mnode/impl/src/mndFunc.c
@@ -152,7 +152,7 @@ static int32_t mndFuncActionDelete(SSdb *pSdb, SFuncObj *pFunc) {
 }
 
 static int32_t mndFuncActionUpdate(SSdb *pSdb, SFuncObj *pOldFunc, SFuncObj *pNewFunc) {
-  mTrace("func:%s, perform update action, old_row:%p new_row:%p", pOldFunc->name, pOldFunc, pNewFunc);
+  mTrace("func:%s, perform update action, old row:%p new row:%p", pOldFunc->name, pOldFunc, pNewFunc);
   return 0;
 }
 
diff --git a/source/dnode/mnode/impl/src/mndMnode.c b/source/dnode/mnode/impl/src/mndMnode.c
index c14d1f51f866f6a70ef0f8391d38ffe151e24984..2c09b298725ea673c24615109ac462186bb10569 100644
--- a/source/dnode/mnode/impl/src/mndMnode.c
+++ b/source/dnode/mnode/impl/src/mndMnode.c
@@ -208,7 +208,7 @@ static int32_t mndMnodeActionDelete(SSdb *pSdb, SMnodeObj *pObj) {
 }
 
 static int32_t mndMnodeActionUpdate(SSdb *pSdb, SMnodeObj *pOld, SMnodeObj *pNew) {
-  mTrace("mnode:%d, perform update action, old_row:%p new_row:%p", pOld->id, pOld, pNew);
+  mTrace("mnode:%d, perform update action, old row:%p new row:%p", pOld->id, pOld, pNew);
   pOld->updateTime = pNew->updateTime;
   return 0;
 }
diff --git a/source/dnode/mnode/impl/src/mndQnode.c b/source/dnode/mnode/impl/src/mndQnode.c
index a223890e8cf4fd7714a465eb3bfff6173109cb67..88cade08eddd6153ca8d904d83ff6ca5d9a06c8e 100644
--- a/source/dnode/mnode/impl/src/mndQnode.c
+++ b/source/dnode/mnode/impl/src/mndQnode.c
@@ -155,7 +155,7 @@ static int32_t mndQnodeActionDelete(SSdb *pSdb, SQnodeObj *pObj) {
 }
 
 static int32_t mndQnodeActionUpdate(SSdb *pSdb, SQnodeObj *pOld, SQnodeObj *pNew) {
-  mTrace("qnode:%d, perform update action, old_row:%p new_row:%p", pOld->id, pOld, pNew);
+  mTrace("qnode:%d, perform update action, old row:%p new row:%p", pOld->id, pOld, pNew);
   pOld->updateTime = pNew->updateTime;
   return 0;
 }
diff --git a/source/dnode/mnode/impl/src/mndSnode.c b/source/dnode/mnode/impl/src/mndSnode.c
index 1b66bedbccb0d6fae41c2facfe4ae3a622571a38..dabd1f0142716691e9f8ed1f02b74164708b6018 100644
--- a/source/dnode/mnode/impl/src/mndSnode.c
+++ b/source/dnode/mnode/impl/src/mndSnode.c
@@ -155,7 +155,7 @@ static int32_t mndSnodeActionDelete(SSdb *pSdb, SSnodeObj *pObj) {
 }
 
 static int32_t mndSnodeActionUpdate(SSdb *pSdb, SSnodeObj *pOld, SSnodeObj *pNew) {
-  mTrace("snode:%d, perform update action, old_row:%p new_row:%p", pOld->id, pOld, pNew);
+  mTrace("snode:%d, perform update action, old row:%p new row:%p", pOld->id, pOld, pNew);
   pOld->updateTime = pNew->updateTime;
   return 0;
 }
diff --git a/source/dnode/mnode/impl/src/mndStb.c b/source/dnode/mnode/impl/src/mndStb.c
index d6b6a07de0c5428f7d1a0984c80779be74baddbb..b01c291ce5b64699e4ba1229bd7becce6cb0755a 100644
--- a/source/dnode/mnode/impl/src/mndStb.c
+++ b/source/dnode/mnode/impl/src/mndStb.c
@@ -178,7 +178,7 @@ static int32_t mndStbActionDelete(SSdb *pSdb, SStbObj *pStb) {
 }
 
 static int32_t mndStbActionUpdate(SSdb *pSdb, SStbObj *pOldStb, SStbObj *pNewStb) {
-  mTrace("stb:%s, perform update action, old_row:%p new_row:%p", pOldStb->name, pOldStb, pNewStb);
+  mTrace("stb:%s, perform update action, old row:%p new row:%p", pOldStb->name, pOldStb, pNewStb);
   atomic_exchange_32(&pOldStb->updateTime, pNewStb->updateTime);
   atomic_exchange_32(&pOldStb->version, pNewStb->version);
 
diff --git a/source/dnode/mnode/impl/src/mndUser.c b/source/dnode/mnode/impl/src/mndUser.c
index e73b34e688c92194ec2a9c63127bd90da4f39cf3..8c153982157d3130780708425cf766b1a2c026bc 100644
--- a/source/dnode/mnode/impl/src/mndUser.c
+++ b/source/dnode/mnode/impl/src/mndUser.c
@@ -192,7 +192,7 @@ static int32_t mndUserActionDelete(SSdb *pSdb, SUserObj *pUser) {
 }
 
 static int32_t mndUserActionUpdate(SSdb *pSdb, SUserObj *pOld, SUserObj *pNew) {
-  mTrace("user:%s, perform update action, old_row:%p new_row:%p", pOld->user, pOld, pNew);
+  mTrace("user:%s, perform update action, old row:%p new row:%p", pOld->user, pOld, pNew);
   memcpy(pOld->pass, pNew->pass, TSDB_PASSWORD_LEN);
   pOld->updateTime = pNew->updateTime;
   return 0;
diff --git a/source/dnode/mnode/impl/src/mndVgroup.c b/source/dnode/mnode/impl/src/mndVgroup.c
index e9d35a6e4c82e14801abec69850c92b42805184b..c5c58a075dfc829597ed9a9f7fe1e2e44e92da3f 100644
--- a/source/dnode/mnode/impl/src/mndVgroup.c
+++ b/source/dnode/mnode/impl/src/mndVgroup.c
@@ -165,7 +165,7 @@ static int32_t mndVgroupActionDelete(SSdb *pSdb, SVgObj *pVgroup) {
 }
 
 static int32_t mndVgroupActionUpdate(SSdb *pSdb, SVgObj *pOldVgroup, SVgObj *pNewVgroup) {
-  mTrace("vgId:%d, perform update action, old_row:%p new_row:%p", pOldVgroup->vgId, pOldVgroup, pNewVgroup);
+  mTrace("vgId:%d, perform update action, old row:%p new row:%p", pOldVgroup->vgId, pOldVgroup, pNewVgroup);
   pOldVgroup->updateTime = pNewVgroup->updateTime;
   pOldVgroup->version = pNewVgroup->version;
   pOldVgroup->hashBegin = pNewVgroup->hashBegin;
@@ -189,7 +189,7 @@ void mndReleaseVgroup(SMnode *pMnode, SVgObj *pVgroup) {
   sdbRelease(pSdb, pVgroup);
 }
 
-SCreateVnodeReq *mndBuildCreateVnodeMsg(SMnode *pMnode, SDnodeObj *pDnode, SDbObj *pDb, SVgObj *pVgroup) {
+SCreateVnodeReq *mndBuildCreateVnodeReq(SMnode *pMnode, SDnodeObj *pDnode, SDbObj *pDb, SVgObj *pVgroup) {
   SCreateVnodeReq *pCreate = calloc(1, sizeof(SCreateVnodeReq));
   if (pCreate == NULL) {
     terrno = TSDB_CODE_OUT_OF_MEMORY;
@@ -248,7 +248,7 @@ SCreateVnodeReq *mndBuildCreateVnodeMsg(SMnode *pMnode, SDnodeObj *pDnode, SDbOb
   return pCreate;
 }
 
-SDropVnodeReq *mndBuildDropVnodeMsg(SMnode *pMnode, SDnodeObj *pDnode, SDbObj *pDb, SVgObj *pVgroup) {
+SDropVnodeReq *mndBuildDropVnodeReq(SMnode *pMnode, SDnodeObj *pDnode, SDbObj *pDb, SVgObj *pVgroup) {
   SDropVnodeReq *pDrop = calloc(1, sizeof(SDropVnodeReq));
   if (pDrop == NULL) {
     terrno = TSDB_CODE_OUT_OF_MEMORY;
diff --git a/source/dnode/mnode/impl/test/db/db.cpp b/source/dnode/mnode/impl/test/db/db.cpp
index 42cf753c7cc128480cce5c028f8b5c55d6e20eba..fd860c87d6ca6ee209a0a0a2702572036d1f6a8b 100644
--- a/source/dnode/mnode/impl/test/db/db.cpp
+++ b/source/dnode/mnode/impl/test/db/db.cpp
@@ -13,17 +13,28 @@
 
 class MndTestDb : public ::testing::Test {
  protected:
-  static void SetUpTestSuite() { test.Init("/tmp/mnode_test_db", 9030); }
-  static void TearDownTestSuite() { test.Cleanup(); }
+  static void SetUpTestSuite() {
+    test.Init("/tmp/mnode_test_db", 9030);
+    const char* fqdn = "localhost";
+    const char* firstEp = "localhost:9030";
 
-  static Testbase test;
+    server2.Start("/tmp/mnode_test_db2", fqdn, 9031, firstEp);
+  }
+  static void TearDownTestSuite() {
+    server2.Stop();
+    test.Cleanup();
+  }
+
+  static Testbase   test;
+  static TestServer server2;
 
  public:
   void SetUp() override {}
   void TearDown() override {}
 };
 
-Testbase MndTestDb::test;
+Testbase   MndTestDb::test;
+TestServer MndTestDb::server2;
 
 TEST_F(MndTestDb, 01_ShowDb) {
   test.SendShowMetaReq(TSDB_MGMT_TABLE_DB, "");
@@ -149,7 +160,7 @@ TEST_F(MndTestDb, 02_Create_Alter_Drop_Db) {
   CheckBinary("d1", TSDB_DB_NAME_LEN - 1);
   CheckTimestamp();
   CheckInt16(2);                   // vgroups
-  CheckInt32(0);
+  CheckInt32(0);                   // tables
   CheckInt16(1);                   // replica
   CheckInt16(2);                   // quorum
   CheckInt16(10);                  // days
@@ -177,7 +188,7 @@ TEST_F(MndTestDb, 02_Create_Alter_Drop_Db) {
   CheckBinary("d1", TSDB_DB_NAME_LEN - 1);
   CheckTimestamp();
   CheckInt16(2);                   // vgroups
-  CheckInt32(0);
+  CheckInt32(0);                   // tables
   CheckInt16(1);                   // replica
   CheckInt16(2);                   // quorum
   CheckInt16(10);                  // days
@@ -301,4 +312,15 @@ TEST_F(MndTestDb, 03_Create_Use_Restart_Use_Db) {
       EXPECT_STREQ(pAddr->fqdn, "localhost");
     }
   }
+
+  {
+    int32_t contLen = sizeof(SDropDbMsg);
+
+    SDropDbMsg* pReq = (SDropDbMsg*)rpcMallocCont(contLen);
+    strcpy(pReq->db, "1.d2");
+
+    SRpcMsg* pRsp = test.SendReq(TDMT_MND_DROP_DB, pReq, contLen);
+    ASSERT_NE(pRsp, nullptr);
+    ASSERT_EQ(pRsp->code, 0);
+  }
 }