fix:null pointer error

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

@@ -509,6 +509,7 @@ SMqSubscribeObj *tCloneSubscribeObj(const SMqSubscribeObj *pSub) {
     taosHashPut(pSubNew->consumerHash, &newEp.consumerId, sizeof(int64_t), &newEp, sizeof(SMqConsumerEp));
   }
   pSubNew->unassignedVgs = taosArrayDup(pSub->unassignedVgs, (__array_item_dup_fn_t)tCloneSMqVgEp);
+  pSubNew->offsetRows = taosArrayDup(pSub->offsetRows, NULL);
   memcpy(pSubNew->dbName, pSub->dbName, TSDB_DB_FNAME_LEN);
   pSubNew->qmsg = taosStrdup(pSub->qmsg);
   return pSubNew;

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

@@ -269,7 +269,7 @@ static void doAddNewConsumers(SMqRebOutputObj *pOutput, const SMqRebInputObj *pI
   for (int32_t i = 0; i < numOfNewConsumers; i++) {
     int64_t consumerId = *(int64_t *)taosArrayGet(pInput->pRebInfo->newConsumers, i);
 
-    SMqConsumerEp newConsumerEp;
+    SMqConsumerEp newConsumerEp = {0};
     newConsumerEp.consumerId = consumerId;
     newConsumerEp.vgs = taosArrayInit(0, sizeof(void *));