http 502

If you add:

define('WP_DEBUG', true);
define('WP_DEBUG_LOG', true);
define('WP_DEBUG_DISPLAY', false);

to wp-config.php then trigger the fatal, you should be able to see debug logs/error information in the /path/to/wordpress/wp-content/debug.log file. You can also check the logs for your webserver, as there may be relevant information there.

• This reply was modified 2 months, 3 weeks ago by dizzyatinnocraft.
• This reply was modified 2 months, 3 weeks ago by dizzyatinnocraft.

Thank you for answering so quickly, dizzyatinnocraft!

1. nginx error log says after triggering…:

2024/08/30 08:11:24 [error] 18507#0: *5584 upstream prematurely closed connection while reading response header from upstream, client: 127.0.0.1, server: , request: “GET /wp-admin/plugins.php?activate=true&plugin_status=all&paged=1&s= HTTP/1.0”, upstream: “fastcgi://unix:/Users/benutzer_mwprivat/Library/Application Support/Local/run/mRetVrTrF/php/php-fpm.socket:”, host: “integration-mentor-de.local”, referrer: “https://integration-mentor-de.local/wp-admin/plugin-install.php?tab=plugin-information&plugin=matomo“

2024/08/30 08:13:59 [error] 18507#0: *5586 upstream prematurely closed connection while reading response header from upstream, client: 127.0.0.1, server: , request: “GET /wp-admin/plugins.php?activate=true&plugin_status=all&paged=1&s= HTTP/1.0”, upstream: “fastcgi://unix:/Users/benutzer_mwprivat/Library/Application Support/Local/run/mRetVrTrF/php/php-fpm.socket:”, host: “integration-mentor-de.local”, referrer: “https://integration-mentor-de.local/wp-admin/plugin-install.php?tab=plugin-information&plugin=matomo”

2) php (error.log does not contain infos with corresponding time stamps) php-fpm.log says:

[30-Aug-2024 08:11:24] WARNING: [pool www] child 18508 exited on signal 11 (SIGSEGV) after 59825.164296 seconds from start
[30-Aug-2024 08:11:24] NOTICE: [pool www] child 19657 started
[30-Aug-2024 08:13:59] WARNING: [pool www] child 18509 exited on signal 11 (SIGSEGV) after 59979.510460 seconds from start
[30-Aug-2024 08:13:59] NOTICE: [pool www] child 19702 started

3) there is no such file …//wp-content/debug.log

I suspect that the error happens too early to create a debug entry. How shall I proceed? Thank you.

SIGSEGV means a segmentation fault occurred, as in, a low level error in your PHP executable, which suggests a bug in the windows implementation of PHP or some other part of your environment.

Also note, since this has nothing to do with Matomo, I’m marking this issue as resolved. These support forums are for helping users with their problems in using the Matomo for WordPress product, not for development advice. Please don’t ask more questions like this here.