[CentOS] Apache won't start, semaphores exhausted
Craig White
craigwhite at azapple.com
Wed Oct 5 00:50:25 UTC 2005
On Tue, 2005-10-04 at 17:45 -0700, Fong Vang wrote:
> One of our systems run Apache 2.0.52 (httpd-2.0.52-12.2.ent.centos4
> rpm). The kernel we're running is 2.6.9-11.ELsmp. After a few weeks
> of uptime, Apache refuses to start with the following error in
> error.log:
>
> [crit] (28)No space left on device: mod_jk: could not create jk_log_lock
>
> With Apache not running, there're a lot of semaphores left behind by
> Apache, e.g.:
>
> ------ Semaphore Arrays --------
> key semid owner perms nsems
> 0x00000000 98304 root 600 1
> 0x00000000 131073 apache 600 1
> 0x00000000 163842 apache 600 1
> 0x00000000 196611 apache 600 1
> 0x00000000 229380 apache 600 1
> 0x00000000 786437 root 600 1
> ...
> ...
> ...
> /proc/sys/kernel/sem has the following settings:
> 250 32000 32 128
>
> Is this an Apache issue or is this a kernel issue? Why is Apache not
> releasing the semaphores?
----
my guess is that you are out of space on partition containing /var
try command line...
df -h
see what 'No space on device' actually means
Craig
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