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Unless connected to admin , putting site in maintenance generate a 500 error.

I have followed Drupal 8 maintenance page theming instructions, modifying the settings.php and adding the template to the theme but it is still not working .

How can i debug this ?

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    you need a more detailed error message, change the settings on /admin/config/development/logging and try again
    – 4uk4
    Commented Sep 13, 2017 at 9:32
  • it is set with all messages but my syslog does not log anything when reload the 5OO error page
    – Matoeil
    Commented Sep 13, 2017 at 9:43
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    then drupal is not able to catch the error and you find it in the error log of the webserver, e.g. /var/log/apache2/error.log
    – 4uk4
    Commented Sep 13, 2017 at 9:51
  • in nginx/errorlog i got 10368#10368: *6631 rewrite or internal redirection cycle while processing "/index.php", Is the server misconfigured?
    – Matoeil
    Commented Sep 13, 2017 at 9:57

1 Answer 1

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BEGINNER VERSION

Maintenance mode is working in general. Use the following direction of debugging: FROM "untouched" Drupal TO your state.

  1. Download a same core version of Drupal as you have. Turn on maintenance mode (without changing anything else), visit the page with a non-admin user.
  2. Apply the settings in your link about (Drupal 8 maintenance page theming ) visit again the page with a non-admin user.

Whenever the site brakes you know where the problem resides.

ADVANCED VERSION

500 errors are always logged in Drupal. Check what says the "recent log messages" with admin. Also you can set in your settings.php

$config['system.logging']['error_level'] = 'verbose';

This won't just show 500 error, but also tell the reason.

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  • and what if the error level verbose is already in loca settings but it does not tell the reason still?
    – Matoeil
    Commented Sep 13, 2017 at 9:40
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    Is local settings loaded by settings.php? Did you check it in recent log messages?
    – ssibal
    Commented Sep 13, 2017 at 9:41
  • die('entering this file') tell me localsettings is loaded
    – Matoeil
    Commented Sep 13, 2017 at 9:44
  • This is not a chat: I asked two questions, make more effort before answering.
    – ssibal
    Commented Sep 13, 2017 at 9:46
  • did i check what in recent log message?the log system is logging things but not when i reload the site with the 5OO error
    – Matoeil
    Commented Sep 13, 2017 at 9:54

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