Nextcloud version:11.0.3
Operating system and version: Debian 8
Apache: 2.4.10
PHP version: 7.0.19-0
For some months ago I found that it is possible to add a line in crontab to pre generate all thumbnail pictures. I added this in my crontab to run every night, sudo -u www-data php /var/www/nextcloud/occ preview:pre-generate
I am not sure if it has worked but for some days ago I started to receive mails that it failed. This is the output I get. I can´t find any good idea from the stack trace what the problem is, anyone who know this better?
An unhandled exception has been thrown:
Error: Call to a member function file_get_contents() on null in /var/www/nextcloud/lib/private/Files/Filesystem.php:719
Stack trace:
#0 /var/www/nextcloud/lib/private/legacy/image.php(597): OC\Files\Filesystem::file_get_contents('/mnt/owncloud/w...')
#1 /var/www/nextcloud/lib/private/Preview/Image.php(57): OC_Image->loadFromFile('/mnt/owncloud/w...')
#2 /var/www/nextcloud/lib/private/Preview/GeneratorHelper.php(54): OC\Preview\Image->getThumbnail('/files/pictures...', 2048, 2048, false, Object(OC\Files\View))
#3 /var/www/nextcloud/lib/private/Preview/Generator.php(155): OC\Preview\GeneratorHelper->getThumbnail(Object(OC\Preview\JPEG), Object(OC\Files\Node\File), 2048, 2048)
#4 /var/www/nextcloud/lib/private/Preview/Generator.php(108): OC\Preview\Generator->getMaxPreview(Object(OC\Files\SimpleFS\SimpleFolder), Object(OC\Files\Node\File), 'image/jpeg')
#5 /var/www/nextcloud/lib/private/PreviewManager.php(182): OC\Preview\Generator->getPreview(Object(OC\Files\Node\File), 32, 32, true, 'fill', 'image/jpeg')
#6 /var/www/nextcloud/apps/previewgenerator/lib/Command/PreGenerate.php(213): OC\PreviewManager->getPreview(Object(OC\Files\Node\File), 32, 32, true)
#7 /var/www/nextcloud/apps/previewgenerator/lib/Command/PreGenerate.php(242): OCA\PreviewGenerator\Command\PreGenerate->processFile(Object(OC\Files\Node\File))
#8 /var/www/nextcloud/apps/previewgenerator/lib/Command/PreGenerate.php(244): OCA\PreviewGenerator\Command\PreGenerate->processFolder(Object(OC\Files\Node\Folder))
#9 /var/www/nextcloud/apps/previewgenerator/lib/Command/PreGenerate.php(244): OCA\PreviewGenerator\Command\PreGenerate->processFolder(Object(OC\Files\Node\Folder))
#10 /var/www/nextcloud/apps/previewgenerator/lib/Command/PreGenerate.php(244): OCA\PreviewGenerator\Command\PreGenerate->processFolder(Object(OC\Files\Node\Folder))
#11 /var/www/nextcloud/apps/previewgenerator/lib/Command/PreGenerate.php(244): OCA\PreviewGenerator\Command\PreGenerate->processFolder(Object(OC\Files\Node\Folder))
#12 /var/www/nextcloud/apps/previewgenerator/lib/Command/PreGenerate.php(244): OCA\PreviewGenerator\Command\PreGenerate->processFolder(Object(OC\Files\Node\Folder))
#13 /var/www/nextcloud/apps/previewgenerator/lib/Command/PreGenerate.php(244): OCA\PreviewGenerator\Command\PreGenerate->processFolder(Object(OC\Files\Node\Folder))
#14 /var/www/nextcloud/apps/previewgenerator/lib/Command/PreGenerate.php(201): OCA\PreviewGenerator\Command\PreGenerate->processFolder(Object(OC\Files\Node\Folder))
#15 /var/www/nextcloud/apps/previewgenerator/lib/Command/PreGenerate.php(170): OCA\PreviewGenerator\Command\PreGenerate->processRow(Array)
#16 /var/www/nextcloud/apps/previewgenerator/lib/Command/PreGenerate.php(137): OCA\PreviewGenerator\Command\PreGenerate->startProcessing()
#17 /var/www/nextcloud/3rdparty/symfony/console/Command/Command.php(256): OCA\PreviewGenerator\Command\PreGenerate->execute(Object(Symfony\Component\Console\Input\ArgvInput), Object(Symfony\Component\Console\Output\ConsoleOutput))
#18 /var/www/nextcloud/3rdparty/symfony/console/Application.php(818): Symfony\Component\Console\Command\Command->run(Object(Symfony\Component\Console\Input\ArgvInput), Object(Symfony\Component\Console\Output\ConsoleOutput))
#19 /var/www/nextcloud/3rdparty/symfony/console/Application.php(186): Symfony\Component\Console\Application->doRunCommand(Object(OCA\PreviewGenerator\Command\PreGenerate), Object(Symfony\Component\Console\Input\ArgvInput), Object(Symfony\Component\Console\Output\ConsoleOutput))
#20 /var/www/nextcloud/3rdparty/symfony/console/Application.php(117): Symfony\Component\Console\Application->doRun(Object(Symfony\Component\Console\Input\ArgvInput), Object(Symfony\Component\Console\Output\ConsoleOutput))
#21 /var/www/nextcloud/lib/private/Console/Application.php(169): Symfony\Component\Console\Application->run(Object(Symfony\Component\Console\Input\ArgvInput), Object(Symfony\Component\Console\Output\ConsoleOutput))
#22 /var/www/nextcloud/console.php(90): OC\Console\Application->run()
#23 /var/www/nextcloud/occ(11): require_once('/var/www/nextcl...')
#24 {main}