[td-225] add error output for getaddrinfo

src/rpc/src/rpcMain.c

@@ -493,7 +493,7 @@ static SRpcConn *rpcOpenConn(SRpcInfo *pRpc, char *peerFqdn, uint16_t peerPort,
   SRpcConn *pConn;
 
   uint32_t peerIp = taosGetIpFromFqdn(peerFqdn);
-  if (peerIp == -1) {
+  if (peerIp == 0xFFFFFFFF) {
     tError("%s, failed to resolve FQDN:%s", pRpc->label, peerFqdn); 
     terrno = TSDB_CODE_RPC_APP_ERROR; 
     return NULL;

src/util/src/tsocket.c

@@ -44,7 +44,7 @@ uint32_t taosGetIpFromFqdn(const char *fqdn) {
   struct addrinfo hints = {0};
   struct addrinfo *result = NULL;
 
-  getaddrinfo(fqdn, NULL, &hints, &result);
+  int32_t ret = getaddrinfo(fqdn, NULL, &hints, &result);
   if (result) {
     struct sockaddr *sa = result->ai_addr;
     struct sockaddr_in *si = (struct sockaddr_in*)sa;
@@ -53,7 +53,8 @@ uint32_t taosGetIpFromFqdn(const char *fqdn) {
     freeaddrinfo(result);
     return ip;
   } else {
-    return -1;
+    uError("failed get the addr info, code:%d, reason:%s", ret, gai_strerror(ret));
+    return 0xFFFFFFFF;
   }
 }