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Php-fpm child process crash when installing / updating an app (on raspberry pi 5)

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#2,576 4 comentarios 2 reacciones 0 asignados Ver en GitHub

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Evaluación

Dificultad
4/5
Tiempo estimado
3-5 días
Aptitud para principiantes
52/100
Tipo de issue
Error
Claridad
Bastante claro
Estado de actividad
Activo
Stack tecnológico
docker, php
Área
backend, devops, infrastructure

Línea de trabajo

Comienza con la configuración de PHP utilizada por la imagen nextcloud:33-fpm y compara el comportamiento en el host aarch64 Raspberry Pi 5 reportado. Reproduce una instalación o actualización de una app mientras recopilas los registros SIGSEGV de PHP-FPM y, a continuación, compáralos con la solución alternativa de tweaks-disable-opcache-jit.ini. Se considera terminado cuando la imagen evita el fallo en sistemas que no son x64 sin romper las instalaciones o actualizaciones normales.

Escrito por el modelo de indexación a partir del texto del issue.

Descripción

0. Needs triage bug

Issue

I've noticed that each time I try to install and/or update an app from the web interface, I get the "502: Bad gateway" error for any subsequent requests. When looking at the nextcloud's container logs, it stays the child processes are constantly crashing:

May 12 11:22:00 nextcloud_app[1087224]: [12-May-2026 09:22:00] WARNING: [pool www] child 181 exited on signal 11 (SIGSEGV - core dumped) after 56.485757 seconds from start
May 12 11:22:00 nextcloud_app[1087224]: [12-May-2026 09:22:00] NOTICE: [pool www] child 205 started
May 12 11:22:01 nextcloud_app[1087224]: [12-May-2026 09:22:01] WARNING: [pool www] child 178 exited on signal 11 (SIGSEGV - core dumped) after 214.245756 seconds from start
May 12 11:22:01 nextcloud_app[1087224]: [12-May-2026 09:22:01] NOTICE: [pool www] child 206 started
May 12 11:22:02 nextcloud_app[1087224]: [12-May-2026 09:22:02] WARNING: [pool www] child 204 exited on signal 11 (SIGSEGV - core dumped) after 19.482163 seconds from start
May 12 11:22:02 nextcloud_app[1087224]: [12-May-2026 09:22:02] NOTICE: [pool www] child 207 started
May 12 11:22:02 nextcloud_app[1087224]: [12-May-2026 09:22:02] WARNING: [pool www] child 205 exited on signal 11 (SIGSEGV - core dumped) after 2.076329 seconds from start
May 12 11:22:02 nextcloud_app[1087224]: [12-May-2026 09:22:02] NOTICE: [pool www] child 208 started
May 12 11:22:03 nextcloud_app[1087224]: [12-May-2026 09:22:03] WARNING: [pool www] child 206 exited on signal 11 (SIGSEGV - core dumped) after 2.357498 seconds from start
May 12 11:22:03 nextcloud_app[1087224]: [12-May-2026 09:22:03] NOTICE: [pool www] child 209 started
May 12 11:22:32 nextcloud_app[1087224]: [12-May-2026 09:22:32] WARNING: [pool www] child 209 exited on signal 11 (SIGSEGV - core dumped) after 29.095544 seconds from start
May 12 11:22:32 nextcloud_app[1087224]: [12-May-2026 09:22:32] NOTICE: [pool www] child 210 started

If I restart the nextcloud (php) container, the child process no longer crashes, and the bad gateway error is gone. The app is also correctly installed/updated.

Workaround

When looking for similar issues, I found this Github issue.
They say that OPCache's JIT is not recommended for other architectures than x64, and might be causing the issue.

So, to disable OPCache's JIT, I added the following file, and mounted it as a read-only volume at /usr/local/etc/php/conf.d/tweaks-disable-opcache-jit.ini:

opcache.jit=0
opcache.jit_buffer_size=0

It indeed solved my issue.

Maybe the opcache's JIT should be disabled for non-x64 architecture to avoid troubles ?

Setup

Nextcloud server is running on podman, with raspberry pi 5 (aarch64 / arm64) as host system.
Containers are managed using podman quadlet (systemd services), with the nextcloud:33-fpm image, and postgresql database.

Details

Result of occ config:list system :

{
    "system": {
        "instanceid": "***REMOVED SENSITIVE VALUE***",
        "serverid": "0",
        "passwordsalt": "***REMOVED SENSITIVE VALUE***",
        "secret": "***REMOVED SENSITIVE VALUE***",
        "trusted_domains": ["***REDACTED**"],
        "datadirectory": "***REMOVED SENSITIVE VALUE***",
        "dbtype": "pgsql",
        "version": "33.0.3.2",
        "overwrite.cli.url": "***REDACTED**",
        "htaccess.RewriteBase": "\/",
        "dbname": "***REMOVED SENSITIVE VALUE***",
        "dbhost": "***REMOVED SENSITIVE VALUE***",
        "dbtableprefix": "oc_",
        "dbuser": "***REMOVED SENSITIVE VALUE***",
        "dbpassword": "***REMOVED SENSITIVE VALUE***",
        "installed": true,
        "filelocking.enabled": true,
        "memcache.locking": "\\OC\\Memcache\\Redis",
        "memcache.local": "\\OC\\Memcache\\APCu",
        "memcache.distributed": "\\OC\\Memcache\\Redis",
        "redis": {
            "host": "***REMOVED SENSITIVE VALUE***",
            "password": "***REMOVED SENSITIVE VALUE***",
            "port": 6379
        },
        "maintenance": false,
        "default_phone_region": "FR",
        "theme": "",
        "loglevel": 2,
        "log_rotate_size": 10485760,
        "app_install_overwrite": [
            "integration_whiteboard",
            "files_markdown",
            "news"
        ],
        "maintenance_window_start": 1,
        "apps_paths": [
            {
                "path": "\/var\/www\/html\/apps",
                "url": "\/apps",
                "writable": false
            },
            {
                "path": "\/var\/www\/html\/custom_apps",
                "url": "\/custom_apps",
                "writable": true
            }
        ],
        "upgrade.disable-web": true,
        "mail_from_address": "***REMOVED SENSITIVE VALUE***",
        "mail_smtpmode": "smtp",
        "mail_sendmailmode": "smtp",
        "mail_domain": "***REMOVED SENSITIVE VALUE***",
        "mail_smtphost": "***REMOVED SENSITIVE VALUE***",
        "mail_smtpport": "25",
        "mail_smtpauth": true,
        "mail_smtpname": "***REMOVED SENSITIVE VALUE***",
        "mail_smtppassword": "***REMOVED SENSITIVE VALUE***",
        "mail_smtpstreamoptions": {
            "ssl": {
                "verify_peer": false,
                "verify_peer_name": false
            }
        },
        "data-fingerprint": "1a0aa84bb341d90c17e4bea6ac46e19e"
    }
}

Quadlet files (equivalent to a docker compose) :

nextcloud.pod
[Unit]
Description=Pod nextcloud
After=collabora_code.container

[Pod]
PodName=nextcloud
PublishPort=8001:80

[Service]
Restart=always

[Install]
# Start by default on boot
WantedBy=multi-user.target default.target
nextcloud_db.container
[Unit]
Description=Nextcloud DB (postgres)

[Container]
ContainerName=nextcloud_db
Pod=nextcloud.pod
Image=docker.io/library/postgres:17
AutoUpdate=registry
Volume=/opt/db/nextcloud/postgres:/var/lib/postgresql/data
EnvironmentFile=/home/nextcloud/container/.env

[Service]
Restart=always
nextcloud_redis.container
[Unit]
Description=Nextcloud cache (redis)

[Container]
ContainerName=nextcloud_redis
Pod=nextcloud.pod
Image=docker.io/library/redis
AutoUpdate=registry

[Service]
Restart=always
nextcloud_app.container
[Unit]
Description=Main nextcloud container
Requires=nextcloud_db.container
After=nextcloud_db.container
Requires=nextcloud_redis.container
After=nextcloud_redis.container

[Container]
ContainerName=nextcloud_app
Pod=nextcloud.pod
Image=docker.io/library/nextcloud:33-fpm
AutoUpdate=registry
Volume=/opt/data/nextcloud/data:/var/www/html
EnvironmentFile=/home/nextcloud/container/.env
Environment=POSTGRES_HOST=localhost
Environment=REDIS_HOST=localhost

[Service]
Restart=always

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