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在 Windows 10 中运行 IIS Express 服务器时，我在使用 python 发出 JSON 请求时不断收到502.3 错误。

完整的错误如下：

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<html xmlns="http://www.w3.org/1999/xhtml">
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<title>IIS 10.0 Detailed Error - 502.3 - Bad Gateway</title>
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</head>
<body>
<div id="content">
<div class="content-container">
  <h3>HTTP Error 502.3 - Bad Gateway</h3>
  <h4>The operation timed out
</h4>
</div>
<div class="content-container">
 <fieldset><h4>Most likely causes:</h4>
  <ul>  <li>The CGI application did not return a valid set of HTTP errors.</li>         <li>A server acting as a proxy or gateway was unable to process the request due to an error in a parent gateway.</li> </ul>
 </fieldset>
</div>
<div class="content-container">
 <fieldset><h4>Things you can try:</h4>
  <ul>  <li>Use DebugDiag to troubleshoot the CGI application.</li>     <li>Determine if a proxy or gateway is responsible for this error.</li> </ul>
 </fieldset>
</div>

<div class="content-container">
 <fieldset><h4>Detailed Error Information:</h4>
  <div id="details-left">
   <table border="0" cellpadding="0" cellspacing="0">
    <tr class="alt"><th>Module</th><td>&nbsp;&nbsp;&nbsp;AspNetCoreModuleV2</td></tr>
    <tr><th>Notification</th><td>&nbsp;&nbsp;&nbsp;ExecuteRequestHandler</td></tr>
    <tr class="alt"><th>Handler</th><td>&nbsp;&nbsp;&nbsp;aspNetCore</td></tr>
    <tr><th>Error Code</th><td>&nbsp;&nbsp;&nbsp;0x80072ee2</td></tr>

   </table>
  </div>
  <div id="details-right">
   <table border="0" cellpadding="0" cellspacing="0">
    <tr class="alt"><th>Requested URL</th><td>&nbsp;&nbsp;&nbsp;http://localhost:44366/api/annotations</td></tr>
    <tr><th>Physical Path</th><td>&nbsp;&nbsp;&nbsp;C:\Users\320067977\Documents\Repos\Philips.Pxl.Platform.Annotations\src\Annotations.Web.Api\api\annotations</td></tr>
    <tr class="alt"><th>Logon Method</th><td>&nbsp;&nbsp;&nbsp;Anonymous</td></tr>
    <tr><th>Logon User</th><td>&nbsp;&nbsp;&nbsp;Anonymous</td></tr>

   </table>
   <div class="clear"></div>
  </div>
 </fieldset>
</div>

<div class="content-container">
 <fieldset><h4>More Information:</h4>
  This error occurs when a CGI application does not return a valid set of HTTP headers, or when a proxy or gateway was unable to send the request to a parent gateway. You may need to get a network trace or contact the proxy server administrator, if it is not a CGI problem.
  <p><a href="https://go.microsoft.com/fwlink/?LinkID=62293&amp;IIS70Error=502,3,0x80072ee2,17763">View more information &raquo;</a></p>

 </fieldset>
</div>
</div>
</body>
</html>

此错误似乎与使用 dotMemory 分析网站的内存使用情况有关，因为在没有 dotMemory 的情况下运行应用程序时不会出现 502 错误，因此在发出大型 JSON 请求时不会出现 502 错误。

任何人都可以就问题的潜在来源提出建议，或者 dotMemory 是否具有可以纠正此错误的配置选项？

先感谢您！

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