Drupal fails after updating docker image to >=9.4.6 because of composer

[Veit Kunz]

Hi, I just tried to update the docker version of my Drupal site from 9.4.5 to the latest version 9.4.8. But it seems that Drupal fails to serve a page with any version since 9.4.6 of the Docker image. If I roll back to version 9.4.5, everything works fine again. If I remove the composer require from the Dockerfile, everything works fine also.

If I try to open my site in the browser, it redirects me to /core/install.php and just shows this error message:

Fatal error: Cannot redeclare format_size() (previously declared in /opt/drupal/web/core/includes/common.inc:137) in /opt/drupal/vendor/drupal/core/includes/common.inc on line 137

Since everything worked fine up to Docker image version 9.4.5, I assume that something has changed in the Docker image version 9.4.6 that causes the error.

This is my Dockerfile:

FROM drupal:9.4.8-php8.1

RUN composer require 'drupal/phpmailer_smtp:^2.0'

#RUN cd /usr/local/etc/php/ && \
#    cp php.ini-production php.ini && \
#    sed -i "s/post_max_size.*/post_max_size = 208M/g" php.ini && \
#    sed -i "s/upload_max_filesize.*/upload_max_filesize = 200M/g" php.ini

This is my docker-compose.yml:

services:
  drupal:
    build: ./docker
    ports:
      - "127.0.0.1:8078:80"
    restart: always
    volumes:
      - ./volumes/modules:/var/www/html/modules
      - ./volumes/profiles:/var/www/html/profiles
      - ./volumes/themes:/var/www/html/themes
      - ./volumes/sites:/var/www/html/sites

[Fraser Thompson]

I was experiencing this same issue, and I managed to fix it, but I'm not 100% sure how.

Instead of doing composer require [modules] in the Dockerfile, I now do composer require [modules] --no-update and then composer update. This fixes the issue.

Would be very interested in why.

[Veit Kunz]

This works for me also, thank you.