Error 500 (Max Memory Allocated) in new Drupal 8 Installation after changing Display Settings

Question

I have set up a fresh instance of Drupal 8 and installed two modules:

• Paragraphs (8.x-1.12)
• Entity Reference Revisions (8.x-1.9)

I have also installed the Barrio theme (Barrio 5.5.1.)

Then I have gone ahead and created a new content type with two fields (both Paragraph Revisions.) When trying to add a new page by navigating to Content -> Add, everything works fine until I go ahead and make any modifications to the Form Display or Display Settings of the Content Type. Once modifications have been made, regardless which modifications, I get an error 500 upon adding a page of said Content Type.

The relevant log entries:

var/www/vhosts/some-website.com/httpdocs/core/lib/Drupal/Core/Field/WidgetBase.php on line 510', referer: https://some-website.com/node/add/

[Thu Jun 24 16:33:28.779959 2021] [proxy_fcgi:error] [pid 10213:tid 140020013704960] [client 91.249.132.211:43799] AH01071: Got error 'PHP message: PHP Fatal error:  Allowed memory size of 268435456 bytes exhausted (tried to allocate 135168 bytes) in /var/www/vhosts/some-website.com/httpdocs/core/lib/Drupal/Core/Field/WidgetBase.php on line 510'

[Thu Jun 24 16:36:33.558731 2021] [proxy_fcgi:error] [pid 10213:tid 140019649947392] [client 91.249.132.211:62936] AH01071: Got error 'PHP message: PHP Fatal error:  Allowed memory size of 268435456 bytes exhausted (tried to allocate 135168 bytes) in /var/www/vhosts/some-website.com/httpdocs/modules/paragraphs/src/Plugin/Field/FieldWidget/InlineParagraphsWidget.php on line 821', referer: https://some-website.com/node/add/

[Thu Jun 24 16:36:55.127020 2021] [proxy_fcgi:error] [pid 10213:tid 140019616376576] [client 91.249.132.211:63829] AH01071: Got error 'PHP message: PHP Fatal error:  Allowed memory size of 268435456 bytes exhausted (tried to allocate 135168 bytes) in /var/www/vhosts/some-website.com/httpdocs/core/lib/Drupal/Core/Field/WidgetBase.php on line 510'

I have already tried increasing the memory limit to extreme values, but without success. I am currently using PHP v7.3.28 as well as Drupal core 8.9.16. The installation is running on a Linux server through Plesk.

Does anyone have a clue what could be wrong?

Answer 1

Your memory is set to less than 256MB which is what it tried to allocate - (268435456 + 135168) / 1024 / 1024

You mentioned,

I have already tried increasing the memory limit to extreme values, but without success.

In a comment,

Yes, definitely successful and no change, regardless of the value set

If you go to /admin/reports/status, is that reporting the 256MB or is it reporting the higher, extreme, value that you're are setting up.

If it's not displaying, go to /admin/reports/status/php and look for Loaded Configuration File. That value will point to the php.ini file you should be modifying.

Make sure you are modifying that file.

If that is the file you are modifying, I'd just try restarting the whole server. Either you are only restarting Apache and PHP is not running as a module or there's something else going on like there being an upper limit or the value being overridden in another location.