check empty dnode

source/dnode/mnode/impl/src/mndDnode.c

@@ -986,21 +986,21 @@ static int32_t mndProcessDropDnodeReq(SRpcMsg *pReq) {
   }
 
   int32_t numOfVnodes = mndGetVnodesNum(pMnode, pDnode->id);
-  if (numOfVnodes > 0 || pMObj != NULL || pSObj != NULL || pQObj != NULL) {
   bool isonline = mndIsDnodeOnline(pDnode, taosGetTimestampMs());
+  
   if (isonline && force) {
     terrno = TSDB_CODE_DNODE_ONLY_USE_WHEN_OFFLINE;
     mError("dnode:%d, failed to drop since %s, vnodes:%d mnode:%d qnode:%d snode:%d", pDnode->id, terrstr(),
             numOfVnodes, pMObj != NULL, pQObj != NULL, pSObj != NULL);
     goto _OVER;
   }
+
   if (!isonline && !force) {
     terrno = TSDB_CODE_DNODE_OFFLINE;
     mError("dnode:%d, failed to drop since %s, vnodes:%d mnode:%d qnode:%d snode:%d", pDnode->id, terrstr(),
             numOfVnodes, pMObj != NULL, pQObj != NULL, pSObj != NULL);
     goto _OVER;
   }
-  }
 
   code = mndDropDnode(pMnode, pReq, pDnode, pMObj, pQObj, pSObj, numOfVnodes, force, dropReq.unsafe);
   if (code == 0) code = TSDB_CODE_ACTION_IN_PROGRESS;