session_start() ... Disk quota exceeded (122)

[Lurker]

Hi,

I have a virtual root server with Plesk as admin panel for a few days now. I am the only user/client in this system. I haven't changed anything in the php.ini or vhosts configuration after installing Plesk, and the system was working for some days with no problems. But this Monday I got this message on each page:

Warning: session_start(): open(/var/lib/php4/sess_4e561b79012829a4dcfd37addcb12845, O_RDWR) failed: Disk quota exceeded
(122) in /var/www/vhosts/mydomain/httpdocs/file.php on line 10

Here is what I checked now:
- /var/lib/php4/ is writeable
- I have enough hard-disk-space left according to my virtuozzo panel
- In Plesk the HDD-Setting for the Client is unlimited
- The HDD-Quota for the Domain and the Hosting is set to unlimited too
- I checked the user www-data (this must be the one to write the session files) with "quota -u www-data" and again - no quota is set

So where can this message come from?

Another thing: On Monday, when the error appeared the first time, I restored the webserver with an backup from last Friday. All problems where gone afterwards, but now (after 2 days) everything repeats.

Thanks for helping!

Juergen

 

[Lurker]

Forgotten: This the phpinfo() output for sessions:

Session Support enabled
Registered save handlers files user

Directive Local Value Master Value
session.auto_start Off Off
session.bug_compat_42 On On
session.bug_compat_warn On On
session.cache_expire 180 180
session.cache_limiter nocache nocache
session.cookie_domain no value no value
session.cookie_lifetime 0 0
session.cookie_path / /
session.cookie_secure Off Off
session.entropy_file no value no value
session.entropy_length 0 0
session.gc_divisor 100 100
session.gc_maxlifetime 1440 1440
session.gc_probability 0 0
session.name PHPSESSID PHPSESSID
session.referer_check no value no value
session.save_handler files files
session.save_path /var/lib/php4 /var/lib/php4
session.serialize_handler php php
session.use_cookies On On
session.use_only_cookies Off Off
session.use_trans_sid Off Off


BTW: /var/lib/php4 is empty