Nextcloud version (eg, 20.0.5): 20.0.4
Operating system and version (eg, Ubuntu 20.04): docker image
Apache or nginx version (eg, Apache 2.4.25): docker image
PHP version (eg, 7.4): docker image
The issue you are facing:
There are no previews generated for files on external storage (mounted from a different folder on the server. So no SMB, FTP, … or other remotely located files).
The photo app is still showing previews for images, but for those same images, the thumbnails are empty in the files app.
Previews on normal folders (e.g. non-external) work just fine.
It seems to have started in v20 because I had previews in v19. As a consequence, there are also no previews in the android app.
Is this the first time you’ve seen this error? : Y
The output of your Nextcloud log in Admin > Logging:
{"reqId":"EYJfIBHDSHiU3zee1Wnm","level":3,"time":"2021-01-25T10:10:00+00:00","remoteAddr":"","user":"--","app":"cron","method":"","url":"--","message":{"Exception":"RedisException","Message":"php_network_getaddresses: getaddrinfo failed: Name or service not known","Code":0,"Trace":[{"file":"/var/www/html/lib/private/RedisFactory.php","line":92,"function":"connect","class":"Redis","type":"->","args":["nextcloud-redis",6379,0]},{"file":"/var/www/html/lib/private/RedisFactory.php","line":108,"function":"create","class":"OC\\RedisFactory","type":"->","args":[]},{"file":"/var/www/html/lib/private/Memcache/Redis.php","line":43,"function":"getInstance","class":"OC\\RedisFactory","type":"->","args":[]},{"file":"/var/www/html/lib/private/Memcache/Factory.php","line":135,"function":"__construct","class":"OC\\Memcache\\Redis","type":"->","args":["c029aea437dd943f93f1417192083928/lock"]},{"file":"/var/www/html/lib/private/Server.php","line":1018,"function":"createLocking","class":"OC\\Memcache\\Factory","type":"->","args":["lock"]},{"file":"/var/www/html/lib/private/AppFramework/Utility/SimpleContainer.php","line":155,"function":"OC\\{closure}","class":"OC\\Server","type":"->","args":["*** sensitive parameters replaced ***"]},{"file":"/var/www/html/3rdparty/pimple/pimple/src/Pimple/Container.php","line":118,"function":"OC\\AppFramework\\Utility\\{closure}","class":"OC\\AppFramework\\Utility\\SimpleContainer","type":"->","args":["*** sensitive parameters replaced ***"]},{"file":"/var/www/html/lib/private/AppFramework/Utility/SimpleContainer.php","line":122,"function":"offsetGet","class":"Pimple\\Container","type":"->","args":["OCP\\Lock\\ILockingProvider"]},{"file":"/var/www/html/lib/private/ServerContainer.php","line":156,"function":"query","class":"OC\\AppFramework\\Utility\\SimpleContainer","type":"->","args":["OCP\\Lock\\ILockingProvider",true]},{"file":"/var/www/html/lib/private/Server.php","line":1977,"function":"query","class":"OC\\ServerContainer","type":"->","args":["OCP\\Lock\\ILockingProvider"]},{"file":"/var/www/html/lib/private/Files/View.php","line":118,"function":"getLockingProvider","class":"OC\\Server","type":"->","args":[]},{"file":"/var/www/html/lib/private/Server.php","line":395,"function":"__construct","class":"OC\\Files\\View","type":"->","args":[]},{"file":"/var/www/html/lib/private/AppFramework/Utility/SimpleContainer.php","line":155,"function":"OC\\{closure}","class":"OC\\Server","type":"->","args":["*** sensitive parameters replaced ***"]},{"file":"/var/www/html/3rdparty/pimple/pimple/src/Pimple/Container.php","line":118,"function":"OC\\AppFramework\\Utility\\{closure}","class":"OC\\AppFramework\\Utility\\SimpleContainer","type":"->","args":["*** sensitive parameters replaced ***"]},{"file":"/var/www/html/lib/private/AppFramework/Utility/SimpleContainer.php","line":122,"function":"offsetGet","class":"Pimple\\Container","type":"->","args":["OC\\Files\\Node\\HookConnector"]},{"file":"/var/www/html/lib/private/ServerContainer.php","line":156,"function":"query","class":"OC\\AppFramework\\Utility\\SimpleContainer","type":"->","args":["OC\\Files\\Node\\HookConnector",true]},{"file":"/var/www/html/lib/private/Server.php","line":1324,"function":"query","class":"OC\\ServerContainer","type":"->","args":["OC\\Files\\Node\\HookConnector"]},{"file":"/var/www/html/lib/base.php","line":595,"function":"boot","class":"OC\\Server","type":"->","args":[]},{"file":"/var/www/html/lib/base.php","line":1091,"function":"init","class":"OC","type":"::","args":[]},{"file":"/var/www/html/cron.php","line":42,"args":["/var/www/html/lib/base.php"],"function":"require_once"}],"File":"/var/www/html/lib/private/RedisFactory.php","Line":92,"CustomMessage":"--"},"userAgent":"--","version":"20.0.4.0"}
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,
),
),
'memcache.distributed' => '\\OC\\Memcache\\Redis',
'memcache.locking' => '\\OC\\Memcache\\Redis',
'redis' =>
array (
'host' => '--',
'password' => '--',
'port' => 6379,
),
'overwriteprotocol' => 'https',
'trusted_proxies' =>
array (
0 => 'caddy',
),
'mail_smtpmode' => 'smtp',
'mail_smtphost' => 'smtp.--',
'mail_smtpport' => 25,
'mail_smtpsecure' => '',
'mail_smtpauth' => false,
'mail_smtpauthtype' => '--',
'mail_smtpname' => '',
'mail_smtppassword' => '--',
'mail_from_address' => '--',
'mail_domain' => '--',
'passwordsalt' => '--',
'secret' => '--',
'trusted_domains' =>
array (
0 => 'localhost',
1 => '--',
),
'datadirectory' => '/data',
'dbtype' => 'mysql',
'version' => '20.0.4.0',
'overwrite.cli.url' => 'https://---',
'dbname' => 'nextcloud',
'dbhost' => '--',
'dbport' => '',
'dbtableprefix' => 'oc_',
'mysql.utf8mb4' => true,
'dbuser' => '--',
'dbpassword' => '--',
'installed' => true,
'instanceid' => '--',
'log_type' => 'file',
'logfile' => '/var/log/nextcloud/nextcloud.log',
'log_rotate_size' => 104857600,
'skeletondirectory' => '',
'default_locale' => '--',
'maintenance' => false,
'loglevel' => 2,
'preview_max_y' => '1920',
'preview_max_x' => '1920',
'jpeg_quality' => '60',
);
The output of your Apache/nginx/system log in /var/log/____:
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