找到了，设置的缓存不够用了

找到原因了，SDK出现了错误
//wm_sck_server_demo.c
//static int create_socket_server(int port)
if(new_fd != -1)
{
printf("shutting down socket and restaring...n");
shutdown(new_fd,0);
closesocket(new_fd);
//添加
closesocket(server_fd);
}