fix/TD-22618

source/dnode/mgmt/node_mgmt/src/dmTransport.c

@@ -93,7 +93,15 @@ static void dmProcessRpcMsg(SDnode *pDnode, SRpcMsg *pRpc, SEpSet *pEpSet) {
       break;
   }
 
-  if (pDnode->status != DND_STAT_RUNNING) {
+/*
+pDnode is null, TD-22618
+at trans.c line 91
+before this line, dmProcessRpcMsg callback is set
+after this line, parent is set
+so when dmProcessRpcMsg is called, pDonde is still null.
+*/
+  if (pDnode != NULL){
+    if(pDnode->status != DND_STAT_RUNNING) {
       if (pRpc->msgType == TDMT_DND_SERVER_STATUS) {
         dmProcessServerStartupStatus(pDnode, pRpc);
         return;
@@ -106,6 +114,10 @@ static void dmProcessRpcMsg(SDnode *pDnode, SRpcMsg *pRpc, SEpSet *pEpSet) {
         goto _OVER;
       }
     }   
+  } else {
+    terrno = TSDB_CODE_APP_IS_STARTING;
+    goto _OVER;
+  }
 
   if (pRpc->pCont == NULL && (IsReq(pRpc) || pRpc->contLen != 0)) {
     dGError("msg:%p, type:%s pCont is NULL", pRpc, TMSG_INFO(pRpc->msgType));