Nginx负载均衡 微信支付出错 错误代码curl7

Question

1.线上项目使用nginx负载均衡,在使用微信扫码进行订单支付时，有一定几率跳转失败
现在基本可以确定有一台服务器配置出现问题

2.错误代码如下，大佬们帮忙分析一下

Fatal error: Uncaught exception 'WxPayException' with message 'curl出错，错误码:7' in /data/wwwroot/default/mall/api/payment/wxpay/lib/WxPay.Api.php:565 Stack trace: #0 /data/wwwroot/default/mall/api/payment/wxpay/lib/WxPay.Api.php(62): WxPayApi::postXmlCurl('<xml><appid><![...', 'https://api.mch...', false, 10) #1 /data/wwwroot/default/mall/api/payment/wxpay/wxpay.php(66): WxPayApi::unifiedOrder(Object(WxPayUnifiedOrder)) #2 /data/wwwroot/default/mall/control/payment.php(141): wxpay->get_payurl() #3 /data/wwwroot/default/mall/control/payment.php(53): paymentControl->_api_pay(Array, Array) #4 /data/wwwroot/default/core/framework/core/base.php(107): paymentControl->real_orderOp() #5 /data/wwwroot/default/core/framework/core/base.php(46): Base::control() #6 /data/wwwroot/default/mall/index.php(24): Base::run() #7 {main} thrown in /data/wwwroot/default/mall/api/payment/wxpay/lib/WxPay.Api.php on line 565

Answer 1

错误码7就是无法连接到远程服务器。