Apache hangs/crash while running OwnCloud 8.0.0

[Johannes Hessellund]

Upgraded to OwnCloud 8.0.0, every few hours apache and all sites becomes inaccessible. The apache service is running and I don't see any errors in the apache log or the system logs.

See https://github.com/owncloud/core/issues/14175

This is running on ubuntu 14.04. This was running with no issues on Owncloud 7.

When I try to access any site it just sits like the page is loading but never loads. It will sit there like that until I close the browser. No error or connection timeout.

The solution was to purge php5-apcu from the system and restart apache.

While there might be bugs in OwnCloud, no php website should ever be able to hang/crash the whole apache process, and it seems that there is an issue with apcu.

[Paul Broadhead (pjbroad)]

I've been having the same issue and am now waiting to see if purging php5-apcu helps.

When apache stops responding, it has maxed out on threads and I get this message in error.log:

[mpm_prefork:error] [pid 7628] AH00161: server reached MaxRequestWorkers setting, consider raising the MaxRequestWorkers setting

I also have seen a apc related error:
PHP Warning: apc_store(): GC cache entry 'oc558dd98d33/AutoloaderOC_User_Interface' was on gc-list for 3602 seconds in /var/www/owncloud/lib/private/memcache/apc.php on line 21

Killing a few threads allowed me to get to /server-status on the server which showed the threads were all in "Sending Reply" states responding to owncloud/status.php requests.

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.

[Gerard van Dijnsen (gerard-openbizz)]

I have exactly the same problem. Actions taken so far (to no avail):

- Switched from apache default to mpm_prefork
- Removed php-apc

Now checking if removing php5-apcu does indeed work. It crashes rather often so I should know within a day or so...

[Paul Broadhead (pjbroad)]

sudo apt-get purge php5-apcu
sudo service apache2 restart

This fixed it for me.

[Jean-Sébastien Frerot (jsfrerot)]

php5-apcu removal fixed it for me too.

[Johannes Hessellund (osos)]

Did you try updating to php-apcu version 4.0.6?

It is available in a ppa: https://launchpad.net/~ondrej/+archive/ubuntu/php5

This fixes it for me.

[Jonas Pedersen (jonasped)]

Seems that upgrading to php-apcu version 4.0.6 solved the issue for me as well.

[Joan Maspons (jmaspons)]

It seems a duplicated of https://bugs.launchpad.net/ubuntu/+source/php-apcu/+bug/1374892

[samat (somyqk)]

Thanks, I had the same issue. Updating to version 4.0.6 has solved the issue.

[Dan (daniel-scharon)]

the upgrade should be done via SRU or backports, not via PPA or manual installation of a .deb, see #1374892