Merge pull request #20085 from taosdata/fix/TD-22618

fix:pDnode is null when server init

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

@@ -93,18 +93,30 @@ static void dmProcessRpcMsg(SDnode *pDnode, SRpcMsg *pRpc, SEpSet *pEpSet) {
       break;
   }
 
-  if (pDnode->status != DND_STAT_RUNNING) {
-    if (pRpc->msgType == TDMT_DND_SERVER_STATUS) {
-      dmProcessServerStartupStatus(pDnode, pRpc);
-      return;
-    } else {
-      if (pDnode->status == DND_STAT_INIT) {
-        terrno = TSDB_CODE_APP_IS_STARTING;
+/*
+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;
       } else {
-        terrno = TSDB_CODE_APP_IS_STOPPING;
+        if (pDnode->status == DND_STAT_INIT) {
+          terrno = TSDB_CODE_APP_IS_STARTING;
+        } else {
+          terrno = TSDB_CODE_APP_IS_STOPPING;
+        }
+        goto _OVER;
       }
-      goto _OVER;
-    }
+    }   
+  } else {
+    terrno = TSDB_CODE_APP_IS_STARTING;
+    goto _OVER;
   }
 
   if (pRpc->pCont == NULL && (IsReq(pRpc) || pRpc->contLen != 0)) {