Php Segmentation fault with xdebug

[spdivn]

trafficstars

Preconditions

1. Magento version 2.4.7 - No sample data
2. PHP 8.3 (magento/magento-cloud-docker-php:8.3-cli-1.3.7)
3. MySQL 10.6 (mariadb:10.6)
4. Varnish 6.6 (magento/magento-cloud-docker-varnish:6.6-1.3.7)
5. Nginx 1.24 (magento/magento-cloud-docker-nginx:1.24-1.3.7)
6. Opensearch 2.4 (magento/magento-cloud-docker-opensearch:2.4-1.3.7)
7. Fpm (magento/magento-cloud-docker-php:8.3-fpm-1.3.7)
8. Redis 7.2 (redis:7.2)

Steps to reproduce

Use this docker-compose that are generated by ece-docker

# ./vendor/bin/ece-docker 'build:compose' --with-cron --with-xdebug --db='10.6' --php='8.3' --mode=developer --host='magento2.local' --no-es
version: '2.1'
services:
  db:
    hostname: db.magento2.local
    image: 'mariadb:10.6'
    shm_size: 2gb
    environment:
      - MYSQL_ROOT_PASSWORD=magento2
      - MYSQL_DATABASE=magento2
      - MYSQL_USER=magento2
      - MYSQL_PASSWORD=magento2
    ports:
      - '3306:3306'
    volumes:
      - '.:/app:delegated'
      - 'mymagento-magento-db:/var/lib/mysql'
    healthcheck:
      test: 'mysqladmin ping -h localhost -pmagento2'
      interval: 30s
      timeout: 30s
      retries: 3
    networks:
      magento:
        aliases:
          - db.magento2.local
  redis:
    hostname: redis.magento2.local
    image: 'redis:7.2'
    volumes:
      - '.:/app:delegated'
    ports:
      - '6379:6379'
    sysctls:
      net.core.somaxconn: 1024
    ulimits:
      nproc: 65535
      nofile:
        soft: 20000
        hard: 40000
    healthcheck:
      test: 'redis-cli ping || exit 1'
      interval: 30s
      timeout: 30s
      retries: 3
    networks:
      magento:
        aliases:
          - redis.magento2.local
  opensearch:
    hostname: opensearch.magento2.local
    image: 'magento/magento-cloud-docker-opensearch:2.4-1.3.7'
    ulimits:
      memlock:
        soft: -1
        hard: -1
    environment:
      - cluster.name=docker-cluster
      - discovery.type=single-node
      - discovery.seed_hosts=opensearch
      - bootstrap.memory_lock=true
      - DISABLE_SECURITY_PLUGIN=true
    networks:
      magento:
        aliases:
          - opensearch.magento2.local
  fpm:
    hostname: fpm.magento2.local
    image: 'magento/magento-cloud-docker-php:8.3-fpm-1.3.7'
    extends: generic
    volumes:
      - '.:/app:delegated'
    networks:
      magento:
        aliases:
          - fpm.magento2.local
    depends_on:
      db:
        condition: service_healthy
  web:
    hostname: web.magento2.local
    image: 'magento/magento-cloud-docker-nginx:1.24-1.3.7'
    extends: generic
    volumes:
      - '.:/app:delegated'
    environment:
      - WITH_XDEBUG=1
      - NGINX_WORKER_PROCESSES=1
      - NGINX_WORKER_CONNECTIONS=1024
    networks:
      magento:
        aliases:
          - web.magento2.local
    depends_on:
      fpm:
        condition: service_started
  varnish:
    hostname: varnish.magento2.local
    image: 'magento/magento-cloud-docker-varnish:6.6-1.3.7'
    networks:
      magento:
        aliases:
          - varnish.magento2.local
    depends_on:
      web:
        condition: service_started
  tls:
    hostname: tls.magento2.local
    image: 'magento/magento-cloud-docker-nginx:1.24-1.3.7'
    extends: generic
    networks:
      magento:
        aliases:
          - magento2.local
    environment:
      - NGINX_WORKER_PROCESSES=1
      - NGINX_WORKER_CONNECTIONS=1024
      - UPSTREAM_HOST=varnish
      - UPSTREAM_PORT=80
    ports:
      - '80:80'
      - '443:443'
    depends_on:
      varnish:
        condition: service_started
  fpm_xdebug:
    hostname: fpm_xdebug.magento2.local
    image: 'magento/magento-cloud-docker-php:8.3-fpm-1.3.7'
    extends: generic
    volumes:
      - '.:/app:delegated'
    environment:
      - 'PHP_EXTENSIONS=bcmath bz2 calendar exif gd gettext intl mysqli pcntl pdo_mysql soap sockets sysvmsg sysvsem sysvshm opcache zip xsl sodium xdebug'
    networks:
      magento:
        aliases:
          - fpm_xdebug.magento2.local
    depends_on:
      db:
        condition: service_started
  generic:
    hostname: generic.magento2.local
    image: 'magento/magento-cloud-docker-php:8.3-cli-1.3.7'
    env_file: ./.docker/config.env
    environment:
      - MAGENTO_RUN_MODE=developer
      - 'PHP_EXTENSIONS=bcmath bz2 calendar exif gd gettext intl mysqli pcntl pdo_mysql soap sockets sysvmsg sysvsem sysvshm opcache zip xsl sodium'
      - 'SENDMAIL_PATH=/usr/local/bin/mhsendmail --smtp-addr=mailhog:1025'
  build:
    hostname: build.magento2.local
    image: 'magento/magento-cloud-docker-php:8.3-cli-1.3.7'
    extends: generic
    volumes:
      - '.:/app:delegated'
    networks:
      magento:
        aliases:
          - build.magento2.local
    depends_on:
      db:
        condition: service_healthy
      redis:
        condition: service_healthy
      opensearch:
        condition: service_healthy
  deploy:
    hostname: deploy.magento2.local
    image: 'magento/magento-cloud-docker-php:8.3-cli-1.3.7'
    extends: generic
    volumes:
      - '.:/app:delegated'
    networks:
      magento:
        aliases:
          - deploy.magento2.local
    depends_on:
      db:
        condition: service_healthy
      redis:
        condition: service_healthy
      opensearch:
        condition: service_healthy
  mailhog:
    hostname: mailhog.magento2.local
    image: 'magento/magento-cloud-docker-mailhog:1.0-1.3.7'
    ports:
      - '1025:1025'
      - '8025:8025'
    networks:
      magento:
        aliases:
          - mailhog.magento2.local
  cron:
    hostname: cron.magento2.local
    image: 'magento/magento-cloud-docker-php:8.3-cli-1.3.7'
    extends: generic
    command: run-cron
    environment:
      CRONTAB: '* * * * * root cd /app && /usr/local/bin/php bin/magento cron:run >> /app/var/log/cron.log'
    volumes:
      - '.:/app:delegated'
    networks:
      magento:
        aliases:
          - cron.magento2.local
    depends_on:
      db:
        condition: service_healthy
      redis:
        condition: service_healthy
      opensearch:
        condition: service_healthy
volumes:
  mymagento-magento-db: {  }
networks:
  magento:
    driver: bridge

1. Install local docker-compose up -d
2. Enter on fpm_xdebug container
3. Exec php -i

Expected result

1. Show all php information

Actual result

1. Segmentation fault (core dumped)

[vacla]

I can reproduce it.

[kevin-mitchell]

I believe I am experiencing this same issue, though specifically what I'm seeing is that when I set the appropriate debug cookies / headers in a browser at attempt to debug I'm seeing 502 errors in the browser and SIGSEGV in the fpm_xdebug container:

[willryan-stemcell]

I believe this is the same issue as https://github.com/magento/magento-cloud-docker/issues/366

[mfauvell]

I can reproduce it with version 1.4.0 of images.

[jeromecx]

I can confirm this issue also occurs with the following images:

• magento/magento-cloud-docker-php:8.4-cli-1.4.2
• magento/magento-cloud-docker-php:8.3-cli-1.4.2
• magento/magento-cloud-docker-php:8.3-cli-1.4.1

The segfault is reproducible with php -i as soon as Xdebug is loaded.

[xpoback]

I can confirm this is the issue is fully reproducible as described by @jeromecx

[lmatysikpartsasap]

We ran into this and found Blackfire library was causing the segfault.

[xpoback]

The cause of the problem in the incompatibility of Blackfire with Xdebug, as they themselves mention.

If Blackfire is not used, it can be disabled. This worked for me (magento/magento-cloud-docker-php:8.3-cli-1.4.3):

# inside the container
# find the configuration file
find / -type f -name "*blackfire.ini"

# remove the configuration fiel (this one in my case)
rm -f /usr/local/etc/php/conf.d/zz-blackfire.ini

And then it started working fine.

Thanks @lmatysikpartsasap for the hint!

I'd expect @magento/magento-cloud-docker-team to take a look at this and maybe add some documentation for resolving this problem.