HTTP Error 500 after upgrading from Ubuntu 14.04 to 16.04

naxant · February 22, 2017, 2:26pm

Hello guys,

sorry if i do anything wrong, first time posting here.
So basically I had Owncloud 9 running on my server for some time, then I decided to upgrade my distribution.
Now when opening the website for OwnCloud I get HTTP 500 error, all other websites on my server still work perfectly.

Already tried reinstalling it but didn’t help, also Google didn’t help me to fix it. Follwing lines pop up in the error log of apache:

[Wed Feb 22 15:22:55.812871 2017] [:error] [pid 1643] [client 77.75.23.17:56100] PHP Fatal error: Uncaught Exception: Cannot open source device in /var/www/owncloud/lib/private/Security/SecureRandom.php:80\nStack trace:\n#0 /var/www/owncloud/lib/private/Security/SecureRandom.php(80): random_int(0, 63)\n#1 /var/www/owncloud/lib/private/AppFramework/Http/Request.php(484): OC\Security\SecureRandom->generate(20)\n#2 /var/www/owncloud/lib/private/Log/Owncloud.php(90): OC\AppFramework\Http\Request->getId()\n#3 [internal function]: OC\Log\Owncloud::write(‘PHP’, ‘Uncaught Except…’, 3)\n#4 /var/www/owncloud/lib/private/Log.php(298): call_user_func(Array, ‘PHP’, ‘Uncaught Except…’, 3)\n#5 /var/www/owncloud/lib/private/Log.php(156): OC\Log->log(3, ‘Uncaught Except…’, Array)\n#6 /var/www/owncloud/lib/private/Log/ErrorHandler.php(67): OC\Log->critical(‘Uncaught Except…’, Array)\n#7 [internal function]: OC\Log\ErrorHandler::onShutdown()\n#8 {main}\n thrown in /var/www/owncloud/lib/private/Security/SecureRandom.php on line 80

Has anybody ever seen this?

anon81984126 · February 22, 2017, 2:29pm

Hi,

looks like [1] where PHP wasn’t able to access the /dev device causing this issue.

[1]

github.com/owncloud/core

/dev unreadable leads to blank page and upgrade error

opened 11:45AM - 16 Mar 16 UTC

closed 03:07PM - 10 Oct 16 UTC

Blackclaws

enhancement sev4-low

### Steps to reproduce 1. Install Owncloud 9.0 2. Revoke read and execute access… to /dev folder for the http user 3. Owncloud only yields a blank page 4. Install Owncloud 8.2.3 5. Revoke read and execute access to /dev folder for the http user 6. Owncloud only yields a blank page 7. On upgrade to Owncloud 9.0 via occ upgrade you get "Cannot open source device" exception ### Expected behaviour An error message telling what is wrong or just a warning saying that /dev/urandom is unavailable. This used to happen with older versions. For the upgrade I would have expected a more verbose error message. "Cannot open source device" as it comes from mcrypt doesn't give you a lot of information. ### Actual behaviour You get a blank page or a non verbose error message. In actuality the system crashes somewhere during the retrieval of CryptoWrapper from the DepedencyInjection System ### Server configuration **Operating system**: Arch Linux **Web server:** Nginx + PHP-FPM **Database:** MariaDB **PHP version:** 7.0.4 **ownCloud version:** (see ownCloud admin page) 8.2.3/9.0 **Updated from an older ownCloud or fresh install:** Updated **Where did you install ownCloud from:** Arch repositories / Zip files => Same behaviour **Signing status (ownCloud 9.0 and above):** ``` Login as admin user into your ownCloud and access http://example.com/index.php/settings/integrity/failed paste the results here. ``` Integrity checker has been disabled. Integrity cannot be verified. **List of activated apps:** Calendar/Contacts (Without the database password, passwordsalt and secret) $CONFIG = array ( 'instanceid' => 'ocz1hq1sawaa', 'trusted_domains' => array ( redacted ), 'datadirectory' => '/usr/share/webapps/owncloud/data', 'overwrite.cli.url' => 'redacted', 'dbtype' => 'mysql', 'version' => '9.0.0.19', 'dbname' => 'owncloud', 'dbhost' => 'localhost', 'dbtableprefix' => 'oc_', 'installed' => true, 'theme' => '', 'loglevel' => 0, 'maintenance' => false, 'trashbin_retention_obligation' => 'auto', 'forcessl' => true, **Are you using encryption:**no

naxant · February 22, 2017, 3:27pm

Tried this solution but still get the same error and message in the log file.

anon81984126 · February 23, 2017, 6:42am

Which oC versions are you running? Can you access /dev/ on command line with the user running your webserver?

But if you’re still getting the “Cannot open source device” you probably still have that access permissions to /dev

naxant · February 23, 2017, 8:52am

9.1, switched user to www-data and could access /dev perfectly.
Just gonna set up a new server now since I downloaded all important stuff from it yesterday evening.

anon81984126 · February 23, 2017, 9:18am

Hi,

this is only the major version. Please always provide the full version like e.g. 9.1.4. This (and further infos) are also asked in the issue template shown when creating a new thread.