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Update troubleshooting steps for CGI application errors #2041

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Update troubleshooting steps for CGI application errors #2041

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10 changes: 8 additions & 2 deletions ...s/site-behavior-performance/troubleshoot-502-2-bad-gateway-error-in-cgi-apps.md
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Expand Up @@ -35,7 +35,7 @@ This problem occurs because the CGI process terminates unexpectedly before the C

When sending a request to a CGI application running via IIS, the user is presented with the following error instead of the expected response:

> The specified CGI application misbehaved by not returning a complete set of HTTP headers
> The specified CGI application misbehaved by not returning a complete set of HTTP headers.

Capture a [Netmon](/windows-hardware/drivers/portable/using-the-netmon-tool) trace. It shows:

Expand Down Expand Up @@ -78,7 +78,13 @@ HTTP: Data: Number of data bytes remaining = 232 (0x00E8)
001A0: 3E 3C 2F 68 74 6D 6C 3E ></html>
```

Capture [FREB](../health-diagnostic-performance/troubleshoot-php-with-failed-request-tracing.md) log for the HTTP error message and locate which module is throwing this error message.
Capture [FREB](../health-diagnostic-performance/troubleshoot-php-with-failed-request-tracing.md) log for the HTTP error message and locate which module is throwing this error message. Example FREB output

> MODULE_SET_RESPONSE_ERROR_STATUS
> ModuleName="CgiModule"
> Notification="EXECUTE_REQUEST_HANDLER"
> HttpStatus="500"
> HttpReason="Internal Server Error"

Troubleshoot the CGI process executable file to determine why the CGI process terminates unexpectedly. You might have to generate a memory dump file of the CGI process when the access violation occurs.

Expand Down