Merge pull request #4996 from taosdata/hotfix/test

[TD-2792]<fix> for windows usage, remote shutdown also returns - 1 in…

src/rpc/src/rpcUdp.c

@@ -140,6 +140,7 @@ void taosStopUdpConnection(void *handle) {
     pConn = pSet->udpConn + i;
     if (pConn->fd >=0) shutdown(pConn->fd, SHUT_RDWR);
     if (pConn->fd >=0) taosCloseSocket(pConn->fd);
+    pConn->fd = -1;
   }
 
   for (int i = 0; i < pSet->threads; ++i) {
@@ -198,8 +199,13 @@ static void *taosRecvUdpData(void *param) {
   while (1) {
     dataLen = recvfrom(pConn->fd, pConn->buffer, RPC_MAX_UDP_SIZE, 0, (struct sockaddr *)&sourceAdd, &addLen);
     if(dataLen <= 0) {
-      tDebug("%s UDP socket was closed, exiting(%s)", pConn->label, strerror(errno));
-      break;
+      tDebug("%s UDP socket(fd:%d) receive dataLen(%d) error(%s)", pConn->label, pConn->fd, (int32_t)dataLen, strerror(errno));
+      // for windows usage, remote shutdown also returns - 1 in windows client
+      if (-1 == pConn->fd) {
+        break;
+      } else {
+        continue;
+      }
     }
 
     port = ntohs(sourceAdd.sin_port);