Error 500 with PHP fastcgi 0x800700e9

Question

Error 500 with PHP fastcgi 0x800700e9

Mile, István 0

From time to time I got an error 500 with the following code: 0x800700e9.

It's about 1 in every 100k request, but still, it's really concerning.

Otherwise, everything is working fine.

Our server: Windows Server 2019 Std, PHP 8.2.11, everything is up-to-date.

Did anyone have the same experience? Any help is appreciated.

Yurong Dai-MSFT 2,846 Reputation points Microsoft External Staff

2023-10-19T07:29:08.7733333+00:00

Hi @Mile, István,

Please check the IIS logs for any information about the 500 error. The logs can be found in the default location: %SystemDrive%\inetpub\logs\LogFiles.

You can also enable Failed Request Tracing (FRT), FRT will provide detailed information about request processing, including any errors or warnings encountered. The failed request log files can be found in the default location: %systemdrive%\inetpub\logs\FailedReqLogFiles\W3SVC.

The intermittent 500 errors may be caused by resource exhaustion. You can try monitoring server resources such as CPU, memory, and disk usage with tools like Performance Monitor (perfmon) or Resource Monitor to analyze resource usage at the time the error occurred. It is very likely that when the number of visits increases, the server crashes and causes a 500 error.
Mile, István 0 Reputation points

2023-10-20T06:41:14.56+00:00

Hi,

Thanks for the answer and the tips.

Our server is monitored with nagios service, but cpu and other parts are not overloaded.

I check the logs from time to time, that's how I found out about the 500.

I'll give frt a try.

István
Lex Li 6,037 Reputation points Microsoft Employee

2023-10-20T07:07:50.7666667+00:00

Once FRT shows you more details about this issue, you might check who might be contacted to get further assistance from a post I wrote a while ago. As PHP on Windows/IIS is no more supported by Microsoft as announced, likely you need to reach out to PHP community support.
Mile, István 0 Reputation points

2023-10-20T07:19:19.3+00:00

Thanks, this link is very useful.

I've just been able to catch the following error:

|ModuleName="FastCgiModule", Notification="EXECUTE_REQUEST_HANDLER", HttpStatus="500", HttpReason="Internal Server Error", HttpSubStatus="0", ErrorCode="No process is on the other end of the pipe.
(0x800700e9)", ConfigExceptionInfo=""| | -------- | ||
Yurong Dai-MSFT 2,846 Reputation points Microsoft External Staff

2023-10-23T07:59:40.6833333+00:00

For us, this is an impossible problem to reproduce. As Lex Li said, Microsoft no longer supports PHP on Windows/IIS. It is recommended that you can seek help from the PHP community. PHP community link: https://www.php.net/support.php
Mile, István 0 Reputation points

2023-10-27T22:15:17.8633333+00:00

Then maybe it's time for us to dump iis and choose a better solution.
Lex Li 6,037 Reputation points Microsoft Employee

2023-10-29T01:10:55.33+00:00

Correct. If you take a look at latest Microsoft services such as Azure App Service, you can see that Microsoft recommends Linux, not Windows, for web technologies on PHP/Python and so on, https://learn.microsoft.com/en-us/azure/app-service/configure-language-php?pivots=platform-linux

Your answer

Yurong Dai-MSFT 2,846 Reputation points Microsoft External Staff

2023-10-19T07:29:08.7733333+00:00

Hi @Mile, István,

Please check the IIS logs for any information about the 500 error. The logs can be found in the default location: %SystemDrive%\inetpub\logs\LogFiles.

You can also enable Failed Request Tracing (FRT), FRT will provide detailed information about request processing, including any errors or warnings encountered. The failed request log files can be found in the default location: %systemdrive%\inetpub\logs\FailedReqLogFiles\W3SVC.

The intermittent 500 errors may be caused by resource exhaustion. You can try monitoring server resources such as CPU, memory, and disk usage with tools like Performance Monitor (perfmon) or Resource Monitor to analyze resource usage at the time the error occurred. It is very likely that when the number of visits increases, the server crashes and causes a 500 error.
Mile, István 0 Reputation points

2023-10-20T06:41:14.56+00:00

Hi,

Thanks for the answer and the tips.

Our server is monitored with nagios service, but cpu and other parts are not overloaded.

I check the logs from time to time, that's how I found out about the 500.

I'll give frt a try.

István
Lex Li 6,037 Reputation points Microsoft Employee

2023-10-20T07:07:50.7666667+00:00

Once FRT shows you more details about this issue, you might check who might be contacted to get further assistance from a post I wrote a while ago. As PHP on Windows/IIS is no more supported by Microsoft as announced, likely you need to reach out to PHP community support.
Mile, István 0 Reputation points

2023-10-20T07:19:19.3+00:00

Thanks, this link is very useful.

I've just been able to catch the following error:

|ModuleName="FastCgiModule", Notification="EXECUTE_REQUEST_HANDLER", HttpStatus="500", HttpReason="Internal Server Error", HttpSubStatus="0", ErrorCode="No process is on the other end of the pipe.
(0x800700e9)", ConfigExceptionInfo=""| | -------- | ||
Yurong Dai-MSFT 2,846 Reputation points Microsoft External Staff

2023-10-23T07:59:40.6833333+00:00

For us, this is an impossible problem to reproduce. As Lex Li said, Microsoft no longer supports PHP on Windows/IIS. It is recommended that you can seek help from the PHP community. PHP community link: https://www.php.net/support.php
Mile, István 0 Reputation points

2023-10-27T22:15:17.8633333+00:00

Then maybe it's time for us to dump iis and choose a better solution.
Lex Li 6,037 Reputation points Microsoft Employee

2023-10-29T01:10:55.33+00:00

Correct. If you take a look at latest Microsoft services such as Azure App Service, you can see that Microsoft recommends Linux, not Windows, for web technologies on PHP/Python and so on, https://learn.microsoft.com/en-us/azure/app-service/configure-language-php?pivots=platform-linux

Share via

Error 500 with PHP fastcgi 0x800700e9

Your answer