invalid cfg msg while drop vnode

src/mnode/inc/mnodeDef.h

@@ -135,7 +135,8 @@ typedef struct SVgObj {
   char           dbName[TSDB_ACCT_LEN + TSDB_DB_NAME_LEN];
   int8_t         inUse;
   int8_t         accessState;
-  int8_t         reserved0[5];
+  int8_t         status;
+  int8_t         reserved0[4];
   SVnodeGid      vnodeGid[TSDB_MAX_REPLICA];
   int8_t         reserved1[7];
   int8_t         updateEnd[1];

src/mnode/src/mnodeDnode.c

@@ -367,7 +367,6 @@ static int32_t mnodeProcessDnodeStatusMsg(SMnodeMsg *pMsg) {
       pAccess++;
       mnodeDecVgroupRef(pVgroup);
     }
-
   }
 
   if (pDnode->status == TAOS_DN_STATUS_OFFLINE) {

src/mnode/src/mnodeVgroup.c

@@ -38,6 +38,11 @@
 #include "mnodeVgroup.h"
 #include "mnodePeer.h"
 
+typedef enum {
+  TAOS_VG_STATUS_READY,
+  TAOS_VG_STATUS_DROPPING
+} EVgroupStatus;
+
 static void   *tsVgroupSdb = NULL;
 static int32_t tsVgUpdateSize = 0;
 
@@ -279,7 +284,7 @@ void mnodeCheckUnCreatedVgroup(SDnodeObj *pDnode, SVnodeLoad *pVloads, int32_t o
       pNextV++;
     }
 
-    if (i == openVnodes) {
+    if (i == openVnodes && pVgroup->status != TAOS_VG_STATUS_READY) {
       mnodeSendCreateVgroupMsg(pVgroup, NULL);
     }
     
@@ -728,6 +733,7 @@ void mnodeSendDropVnodeMsg(int32_t vgId, SRpcIpSet *ipSet, void *ahandle) {
 }
 
 static void mnodeSendDropVgroupMsg(SVgObj *pVgroup, void *ahandle) {
+  pVgroup->status = TAOS_VG_STATUS_DROPPING; // deleting
   mDebug("vgId:%d, send drop all vnodes msg, ahandle:%p", pVgroup->vgId, ahandle);
   for (int32_t i = 0; i < pVgroup->numOfVnodes; ++i) {
     SRpcIpSet ipSet = mnodeGetIpSetFromIp(pVgroup->vnodeGid[i].pDnode->dnodeEp);