程序中调用：$xs = new XS('demo');时出错如下： [XSErrorException] lib/XS.php(2210): stream_set_blocking(): supplied argument is not a valid stream resource(2) #0 /usr/local/xunsearch/sdk/php/lib/XS.php(2210): xs_error_handler(2, 'stream_set_bloc...', '/usr/local/xuns...', 2210, Array) #1 ...