| 123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475 | <!DOCTYPE html><html lang="zh-CN"><head>  <meta charset="utf-8">  <title>502 错误 - phpstudy</title>  <meta name="keywords" content="">  <meta name="description" content="">  <meta name="renderer" content="webkit">  <meta http-equiv="X-UA-Compatible" content="IE=edge,chrome=1">  <meta name="viewport" content="width=device-width, initial-scale=1, maximum-scale=1">  <meta name="apple-mobile-web-app-status-bar-style" content="black">   <meta name="apple-mobile-web-app-capable" content="yes">  <meta name="format-detection" content="telephone=no">  <meta HTTP-EQUIV="pragma" CONTENT="no-cache">   <meta HTTP-EQUIV="Cache-Control" CONTENT="no-store, must-revalidate">   <meta HTTP-EQUIV="expires" CONTENT="Wed, 26 Feb 1997 08:21:57 GMT">   <meta HTTP-EQUIV="expires" CONTENT="0">  <style>    body{      font: 16px arial,'Microsoft Yahei','Hiragino Sans GB',sans-serif;    }    h1{      margin: 0;      color:#3a87ad;      font-size: 26px;    }    .content{      width: 45%;      margin: 0 auto;         }    .content >div{      margin-top: 50px;      padding: 20px;      background: #d9edf7;        border-radius: 12px;    }    .content dl{      color: #2d6a88;      line-height: 40px;    }     .content div div {      padding-bottom: 20px;      text-align:center;    }  </style></head><body>  <div class="content">      <div>           <h1>HTTP 502 - Bad Gateway 没有响应</h1>        <dl>          <dt>错误说明:坏的网关,http向后端节点请求,没有响应</dt>          <dt>原因1:DNS 缓冲</dt>		  <dd>解决办法:</dd>          <dd>在dos窗口运行 ipconfig /flushdns,该命令会刷新DNS缓冲。</dd>          <dt>原因2:浏览器代理</dt>		  <dd>解决办法:</dd>          <dd>关掉代理。</dd>		  <dt>原因3:dns 被劫持了,即使使用国外的dns,也会被劫持</dt>		  <dd>解决办法:</dd>          <dd>去掉VPN服务器的DNS。切换另外的dns。在windows系统中,可以在本地网络连接的属性中,去掉默认的dns,选用国外的dns,比如google的或opendns。</dd>		  <dt>原因4:php执行超时</dt>		  <dd>解决办法:</dd>          <dd>修改/usr/local/php/etc/php.ini 将max_execution_time 改为300。</dd>		  <dt>原因5:nginx等待时间超时</dt>		  <dd>解决办法:</dd>          <dd>适当增加nginx.conf配置文件中FastCGI的timeout时间。</dd>        </dl>        <div>使用手册,视频教程,BUG反馈,官网地址: <a href="https://www.xp.cn"  target="_blank">www.xp.cn</a> </div>          </div>    </div> </body></html>
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