yar tcp 方式调用偶发性 empty response

[you19891003]

已经是最新版本的yar了

#======php -v
PHP 7.0.17 (cli) (built: Jul 4 2017 13:47:27) ( NTS )
Copyright (c) 1997-2017 The PHP Group
Zend Engine v3.0.0, Copyright (c) 1998-2017 Zend Technologies
with Zend OPcache v7.0.17, Copyright (c) 1999-2017, by Zend Technologies
#======php --ri yar

yar

yar support => enabled
Version => 2.0.3

Directive => Local Value => Master Value
yar.packager => msgpack => msgpack
yar.transport => curl => curl
yar.debug => Off => Off
yar.expose_info => On => On
yar.connect_timeout => 5000 => 5000
yar.timeout => 60000 => 60000
yar.content_type => application/octet-stream => application/octet-stream
yar.allow_persistent => 1 => 1

代码：
try {
$yar = new Yar_Client(YAR_GEO_LOCATION);
$yar->setOpt(YAR_OPT_PERSISTENT, 1);
switch ($type) {
case 'ip2location':
if (!empty($ip)) {
$data = $yar->ip2location($ip);
}
break;
case 'gps2location':
if (!empty($lon) && !empty($lat)) {
$data = $yar->gps2location((float) $lat, (float) $lon);
}
break;
}
} catch (Exception $e) {
writeLog('type:' . $type . ',lon:' . $lon . ',lat:' . $lat . ',ip:' . $ip . ',msg:' . $e->getMessage(), 'yarGeoLocationError');
}

偶发性异常：
2017-08-16 18:38:37||type:ip2location,lon:,lat:,ip:112.80.1.218,msg:empty response

[laruence]

empty respone也有可能是服务端crash了, 或者提前关闭了链接, 还是要具体分析下服务端的实现