Merge pull request #22167 from taosdata/fix/TD-25308

fix err while connect invalid fqdn

source/client/src/clientImpl.c

@@ -1297,13 +1297,19 @@ int initEpSetFromCfg(const char* firstEp, const char* secondEp, SCorEpSet* pEpSe
       return -1;
     }
 
-    int32_t code = taosGetFqdnPortFromEp(firstEp, &mgmtEpSet->eps[0]);
+    int32_t code = taosGetFqdnPortFromEp(firstEp, &mgmtEpSet->eps[mgmtEpSet->numOfEps]);
     if (code != TSDB_CODE_SUCCESS) {
       terrno = TSDB_CODE_TSC_INVALID_FQDN;
       return terrno;
     }
-
-    mgmtEpSet->numOfEps++;
+    uint32_t addr = taosGetIpv4FromFqdn(mgmtEpSet->eps[mgmtEpSet->numOfEps].fqdn);
+    if (addr == 0xffffffff) {
+      tscError("failed to resolve firstEp fqdn: %s, code:%s", mgmtEpSet->eps[mgmtEpSet->numOfEps].fqdn,
+               tstrerror(TSDB_CODE_TSC_INVALID_FQDN));
+      memset(&(mgmtEpSet->eps[mgmtEpSet->numOfEps]), 0, sizeof(mgmtEpSet->eps[mgmtEpSet->numOfEps]));
+    } else {
+      mgmtEpSet->numOfEps++;
+    }
   }
 
   if (secondEp && secondEp[0] != 0) {
@@ -1313,12 +1319,19 @@ int initEpSetFromCfg(const char* firstEp, const char* secondEp, SCorEpSet* pEpSe
     }
 
     taosGetFqdnPortFromEp(secondEp, &mgmtEpSet->eps[mgmtEpSet->numOfEps]);
-    mgmtEpSet->numOfEps++;
+    uint32_t addr = taosGetIpv4FromFqdn(mgmtEpSet->eps[mgmtEpSet->numOfEps].fqdn);
+    if (addr == 0xffffffff) {
+      tscError("failed to resolve secondEp fqdn: %s, code:%s", mgmtEpSet->eps[mgmtEpSet->numOfEps].fqdn,
+               tstrerror(TSDB_CODE_TSC_INVALID_FQDN));
+      memset(&(mgmtEpSet->eps[mgmtEpSet->numOfEps]), 0, sizeof(mgmtEpSet->eps[mgmtEpSet->numOfEps]));
+    } else {
+      mgmtEpSet->numOfEps++;
+    }
   }
 
   if (mgmtEpSet->numOfEps == 0) {
-    terrno = TSDB_CODE_TSC_INVALID_FQDN;
-    return -1;
+    terrno = TSDB_CODE_RPC_NETWORK_UNAVAIL;
+    return TSDB_CODE_RPC_NETWORK_UNAVAIL;
   }
 
   return 0;

source/client/src/clientMsgHandler.c

@@ -99,13 +99,20 @@ int32_t processConnectRsp(void* param, SDataBuf* pMsg, int32_t code) {
     goto End;
   }
 
+  int updateEpSet = 1;
   if (connectRsp.dnodeNum == 1) {
     SEpSet srcEpSet = getEpSet_s(&pTscObj->pAppInfo->mgmtEp);
     SEpSet dstEpSet = connectRsp.epSet;
-    rpcSetDefaultAddr(pTscObj->pAppInfo->pTransporter, srcEpSet.eps[srcEpSet.inUse].fqdn,
-                      dstEpSet.eps[dstEpSet.inUse].fqdn);
-  } else if (connectRsp.dnodeNum > 1 && !isEpsetEqual(&pTscObj->pAppInfo->mgmtEp.epSet, &connectRsp.epSet)) {
-    SEpSet* pOrig = &pTscObj->pAppInfo->mgmtEp.epSet;
+    if (srcEpSet.numOfEps == 1) {
+      rpcSetDefaultAddr(pTscObj->pAppInfo->pTransporter, srcEpSet.eps[srcEpSet.inUse].fqdn,
+                        dstEpSet.eps[dstEpSet.inUse].fqdn);
+      updateEpSet = 0;
+    }
+  }
+  if (updateEpSet == 1 && !isEpsetEqual(&pTscObj->pAppInfo->mgmtEp.epSet, &connectRsp.epSet)) {
+    SEpSet corEpSet = getEpSet_s(&pTscObj->pAppInfo->mgmtEp);
+
+    SEpSet* pOrig = &corEpSet;
     SEp*    pOrigEp = &pOrig->eps[pOrig->inUse];
     SEp*    pNewEp = &connectRsp.epSet.eps[connectRsp.epSet.inUse];
     tscDebug("mnode epset updated from %d/%d=>%s:%d to %d/%d=>%s:%d in connRsp", pOrig->inUse, pOrig->numOfEps,