Child pid XX exit signal Segmentation fault

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Nextcloud version: 27.0.2
Operating system and version: Ubuntu 22.04
Apache or nginx version: 2.4.57
PHP version: 8.2.10

The issue you are facing:

After Watchtower updated my nextcloud docker it doesn’t start any more

Is this the first time you’ve seen this error?: Yes

Steps to replicate it:

  1. docker compose up

The output of your Nextcloud log in Admin > Logging:
Webinterface is not reachable

The output of your config.php file in /path/to/nextcloud (make sure you remove any identifiable information!):

<?php
$CONFIG = array (
  'htaccess.RewriteBase' => '/',
  'memcache.local' => '\\OC\\Memcache\\APCu',
  'apps_paths' => 
  array (
    0 => 
    array (
      'path' => '/var/www/html/apps',
      'url' => '/apps',
      'writable' => false,
    ),
    1 => 
    array (
      'path' => '/var/www/html/custom_apps',
      'url' => '/custom_apps',
      'writable' => true,
    ),
  ),
  'instanceid' => 'xxxxx',
  'passwordsalt' => 'xxxxx',
  'secret' => 'xxxxx',
  'trusted_domains' => 
  array (
    0 => '192.168.11.3:8080',
    1 => 'cloud.example.com',
    2 => 'app',
  ),
  'datadirectory' => '/var/www/html/data',
  'dbtype' => 'mysql',
  'version' => '27.0.2.1',
  'overwrite.cli.url' => 'https://cloud.example.com',
  'dbname' => 'nextcloud',
  'dbhost' => 'db',
  'dbport' => '',
  'dbtableprefix' => 'oc_',
  'mysql.utf8mb4' => true,
  'dbuser' => 'nextcloud',
  'dbpassword' => 'xxxxx',
  'installed' => true,
  'overwriteprotocol' => 'https',
  'maintenance' => false,
  'app_install_overwrite' => 
  array (
    0 => 'files_external_gdrive',
    1 => 'documentserver_community',
  ),
  'loglevel' => 0,
  'app.mail.verify-tls-peer' => false,
  'theme' => '',
  'memcache.distributed' => '\\OC\\Memcache\\Redis',
  'memcache.locking' => '\\OC\\Memcache\\Redis',
  'redis' => 
  array (
    'host' => 'redis',
    'password' => false,
    'port' => 6379,
  ),
  'default_phone_region' => 'DE',
  'allow_local_remote_servers' => true,
  'mail_from_address' => 'no-reply',
  'mail_smtpmode' => 'smtp',
  'mail_sendmailmode' => 'smtp',
  'mail_domain' => 'example.com',
  'mail_smtphost' => 'smtp',
);

The output of your Apache/nginx/system log in /var/log/____:
/var/log/apache2/error.log is a device file No idea what that means

Output errors in nextcloud.log in /var/www/ or as admin user in top right menu, filtering for errors. Use a pastebin service if necessary.

# cat nextcloud.log | grep "\"level\":3"
{"reqId":"BwSahmaXhcBuieS01Xat","level":3,"time":"2023-09-13T07:50:02+00:00","remoteAddr":"","user":"--","app":"core","method":"","url":"--","message":"Can't get app storage, app files_external, user not logged in","userAgent":"--","version":"27.0.2.1","data":{"app":"core"}}
{"reqId":"BwSahmaXhcBuieS01Xat","level":3,"time":"2023-09-13T07:50:02+00:00","remoteAddr":"","user":"--","app":"core","method":"","url":"--","message":"Can't get app storage, app files_external, user not logged in","userAgent":"--","version":"27.0.2.1","data":{"app":"core"}}
{"reqId":"BwSahmaXhcBuieS01Xat","level":3,"time":"2023-09-13T08:09:50+00:00","remoteAddr":"","user":"--","app":"PHP","method":"","url":"--","message":"Allowed memory size of 536870912 bytes exhausted (tried to allocate 20480 bytes) at /var/www/html/3rdparty/phpseclib/phpseclib/phpseclib/Net/SFTP.php#3306","userAgent":"--","version":"27.0.2.1","data":{"app":"PHP"}}
{"reqId":"ysYgRPPXhh3TaJE3R9F7","level":3,"time":"2023-09-13T19:50:02+00:00","remoteAddr":"","user":"--","app":"core","method":"","url":"--","message":"Can't get app storage, app files_external, user not logged in","userAgent":"--","version":"27.0.2.1","data":{"app":"core"}}
{"reqId":"ysYgRPPXhh3TaJE3R9F7","level":3,"time":"2023-09-13T19:50:02+00:00","remoteAddr":"","user":"--","app":"core","method":"","url":"--","message":"Can't get app storage, app files_external, user not logged in","userAgent":"--","version":"27.0.2.1","data":{"app":"core"}}
{"reqId":"ysYgRPPXhh3TaJE3R9F7","level":3,"time":"2023-09-13T20:13:05+00:00","remoteAddr":"","user":"--","app":"PHP","method":"","url":"--","message":"Allowed memory size of 536870912 bytes exhausted (tried to allocate 16384 bytes) at /var/www/html/3rdparty/doctrine/dbal/src/Driver/PDO/Statement.php#101","userAgent":"--","version":"27.0.2.1","data":{"app":"PHP"}}
{"reqId":"FDvpZwMYzBXnxpgQpJJm","level":3,"time":"2023-09-14T07:50:02+00:00","remoteAddr":"","user":"--","app":"core","method":"","url":"--","message":"Can't get app storage, app files_external, user not logged in","userAgent":"--","version":"27.0.2.1","data":{"app":"core"}}
{"reqId":"FDvpZwMYzBXnxpgQpJJm","level":3,"time":"2023-09-14T07:50:02+00:00","remoteAddr":"","user":"--","app":"core","method":"","url":"--","message":"Can't get app storage, app files_external, user not logged in","userAgent":"--","version":"27.0.2.1","data":{"app":"core"}}
{"reqId":"KLEEe4HijbXJwNtwibh2","level":3,"time":"2023-09-14T19:50:02+00:00","remoteAddr":"","user":"--","app":"core","method":"","url":"--","message":"Can't get app storage, app files_external, user not logged in","userAgent":"--","version":"27.0.2.1","data":{"app":"core"}}
{"reqId":"KLEEe4HijbXJwNtwibh2","level":3,"time":"2023-09-14T19:50:02+00:00","remoteAddr":"","user":"--","app":"core","method":"","url":"--","message":"Can't get app storage, app files_external, user not logged in","userAgent":"--","version":"27.0.2.1","data":{"app":"core"}}
{"reqId":"KLEEe4HijbXJwNtwibh2","level":3,"time":"2023-09-14T20:12:59+00:00","remoteAddr":"","user":"--","app":"PHP","method":"","url":"--","message":"Allowed memory size of 536870912 bytes exhausted (tried to allocate 16384 bytes) at /var/www/html/3rdparty/doctrine/dbal/src/Driver/PDO/Statement.php#101","userAgent":"--","version":"27.0.2.1","data":{"app":"PHP"}}

Command line output:

nextcloud-app-1    | [Fri Sep 15 19:19:17.425827 2023] [core:notice] [pid 1] AH00051: child pid 141 exit signal Segmentation fault (11), possible coredump in /etc/apache2
nextcloud-db-1     | 2023-09-15 19:19:56 184 [Warning] Aborted connection 184 to db: 'nextcloud' user: 'nextcloud' host: '192.168.16.5' (Got an error reading communication packets)
nextcloud-app-1    | [Fri Sep 15 19:19:56.464573 2023] [core:notice] [pid 1] AH00051: child pid 153 exit signal Segmentation fault (11), possible coredump in /etc/apache2
nextcloud-db-1     | 2023-09-15 19:20:18 186 [Warning] Aborted connection 186 to db: 'nextcloud' user: 'nextcloud' host: '192.168.16.5' (Got an error reading communication packets)
nextcloud-db-1     | 2023-09-15 19:20:18 187 [Warning] Aborted connection 187 to db: 'nextcloud' user: 'nextcloud' host: '192.168.16.5' (Got an error reading communication packets)
nextcloud-app-1    | 162.158.111.34 - User [15/Sep/2023:19:20:19 +0000] "GET /status.php HTTP/1.1" 200 1028 "-" "Mozilla/5.0 (Linux) mirall/3.9.3git (Nextcloud, manjaro-6.1.51-1-MANJARO ClientArchitecture: x86_64 OsArchitecture: x86_64)"
nextcloud-app-1    | 162.158.111.34 - User [15/Sep/2023:19:20:19 +0000] "PROPFIND /remote.php/dav/files/User/ HTTP/1.1" 503 842 "-" "Mozilla/5.0 (Linux) mirall/3.9.3git (Nextcloud, manjaro-6.1.51-1-MANJARO ClientArchitecture: x86_64 OsArchitecture: x86_64)"
nextcloud-app-1    | [Fri Sep 15 19:20:19.488441 2023] [core:notice] [pid 1] AH00051: child pid 147 exit signal Segmentation fault (11), possible coredump in /etc/apache2
nextcloud-app-1    | [Fri Sep 15 19:20:19.488488 2023] [core:notice] [pid 1] AH00051: child pid 156 exit signal Segmentation fault (11), possible coredump in /etc/apache2

1 Like

I have exactly the same problem after updating to the docker:latest container.

I restored a backup, but I still get the same error. so I guess nextcloud is broken and not my docker volumes

Does someone have an idea what the root of the problem is? Did I break my database or is the image on docker hub buggy?

Or in other word, would it help to reinstall nextcloud or should I wait for an update?

Next update: I restored a really old database dumb from 2021 and still get the segmentation fault

Final update: Updating to 27.1 didn’t help.

I fixed it by downgrading. I know it’s not supported and not recommended, but it worked. To do that

  1. Pin your nextcloud image version to i.e. 27.0.1
  2. in your version.php set $OC_Version = array(27,0,1,2); and $OC_VersionString = '27.0.1';
  3. in config/config.php set 'version' => '27.0.1.2'

Same issue is here.
You have two alternatives:

It seems the redis docker image create some issue on the docker-network if you does not define password.

2 Likes

Same issue, just updated from 25.0.6 to 25.0.12 and I cannot get rid of this core dump.
I use docker with apache images

I tried increasing the allocated memory but it doesn’t work.

Anyone found a satisfactory solution ?

Upgrading to latest version of Redis and enabling Redis password solved it for me.

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