Title: http 502
Last modified: August 29, 2024

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# http 502

 *  Resolved [schnellandi](https://wordpress.org/support/users/schnellandi/)
 * (@schnellandi)
 * [1 year, 9 months ago](https://wordpress.org/support/topic/http-502/)
 * Good day, I am currently developing locally and installing the Matomo plugin 
   instantly crashes the entire admin dashboard. I am new to WordPress and have 
   no idea how to debug this issue except of deleting the entire Matomo plugin folder.
   Any suggestions highly appreciated 🙂

Viewing 3 replies - 1 through 3 (of 3 total)

 *  Plugin Support [dizzyatinnocraft](https://wordpress.org/support/users/dizzyatinnocraft/)
 * (@dizzyatinnocraft)
 * [1 year, 9 months ago](https://wordpress.org/support/topic/http-502/#post-17983248)
 * If you add:
 *     ```wp-block-code
       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 1 year, 9 months ago by [dizzyatinnocraft](https://wordpress.org/support/users/dizzyatinnocraft/).
    -  This reply was modified 1 year, 9 months ago by [dizzyatinnocraft](https://wordpress.org/support/users/dizzyatinnocraft/).
 *  Thread Starter [schnellandi](https://wordpress.org/support/users/schnellandi/)
 * (@schnellandi)
 * [1 year, 9 months ago](https://wordpress.org/support/topic/http-502/#post-17984488)
 * Thank you for answering so quickly, [dizzyatinnocraft](https://wordpress.org/support/users/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: “[http://integration-mentor-de.local/wp-admin/plugin-install.php?tab=plugin-information&plugin=](http://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: “[http://integration-mentor-de.local/wp-admin/plugin-install.php?tab=plugin-information&plugin=matomo&#8221](http://integration-mentor-de.local/wp-admin/plugin-install.php?tab=plugin-information&plugin=matomo&#8221);
 * **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.
 *  Plugin Support [dizzyatinnocraft](https://wordpress.org/support/users/dizzyatinnocraft/)
 * (@dizzyatinnocraft)
 * [1 year, 9 months ago](https://wordpress.org/support/topic/http-502/#post-17984531)
 * 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.

Viewing 3 replies - 1 through 3 (of 3 total)

The topic ‘http 502’ is closed to new replies.

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 * 3 replies
 * 2 participants
 * Last reply from: [dizzyatinnocraft](https://wordpress.org/support/users/dizzyatinnocraft/)
 * Last activity: [1 year, 9 months ago](https://wordpress.org/support/topic/http-502/#post-17984531)
 * Status: resolved