check empty

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

@@ -995,11 +995,13 @@ static int32_t mndProcessDropDnodeReq(SRpcMsg *pReq) {
     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;
+  if (numOfVnodes > 0 || pMObj != NULL || pSObj != NULL || pQObj != NULL) {
+    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);