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Fix Apache - No space left on device: Couldn't create accept lock or Cannot create SSLMutex

Fri, 2005-08-05 14:09 — carlos
When dealing with mem-leaks in my mod_perl-apps I ran into a curious apache-problem. After a while apache could not be started but failed with strange errors like: [emerg] (28)No space left on device: Couldn't create accept lock or [crit] (28)No space left on device: mod_rewrite: could not create rewrite_log_lock Configuration Failed or [Wed Dec 07 00:00:09 2005] [error] (28)No space left on device: Cannot create SSLMutex There was definitely enough space on the device where the locks are stored (default /usr/local/apache2/logs/). I tried to explicetely different Lockfiles using the LockFile-directive but this did not help. I also tried a non-default AcceptMutex (flock) which then solved the acceptlock-issue and ended in the rewrite_log_lock-issue. Only reboot of the system helped out of my crisis. Solution: There were myriads of semaphore-arrays left, owned by my apache-user. ipcs -s | grep apache Removing this semaphores immediately solved the problem. ipcs -s | grep apache | perl -e 'while (<STDIN>) { @a=split(/\s+/); print `ipcrm sem $a[1]`}'

Comments

Tue, 2010-02-09 13:36 — davegs

Finding used test equipment

Finding used test equipment for macs is pretty tough going to have to get a netbook
Thu, 2008-11-27 06:17 — itsadok

Some changes required to work on Ubuntu 8.04

Thanks a lot for this, here are a few changes I made to make this work on Ubuntu Hardy: ipcs -s | grep www-data | sudo perl -alne 'qx(ipcrm -s $F[1])' 1. The apache user is www-data instead of apache 2. ipcrm changed its parameters format from "sem " to "-s " 3. Used sudo for the ipcrm 3. Just for fun, I tweaked the perl command line parameters to use auto-split and auto-line ending
Thu, 2008-11-13 21:26 — merlynx

Suggested permanent fix

Thanks for the fix, had me stumped for a while. Very useful script. Suggested permanent fix is setting the SSLMutex directive to "sem" SSLMutex sem http://www.modssl.org/docs/2.1/ssl_reference.html HTH, and Thanks again...
Wed, 2008-04-30 06:40 — chetan

thanks Solved

saved me from much down time. thanks lot chetanM
Tue, 2007-08-07 11:31 — gara (not verified)

Thank you

Very usefull script
Sat, 2005-10-15 20:37 — Anonymous

Shell version

Hi , for sh lovers i am putting this command ipcs -s | grep apache | awk ' { print $2 } ' | xargs ipcrm sem Thanks, Nightlife_king
Tue, 2005-10-11 08:55 — Anonymous

Thanks

THanks, i had the same problem and because of your post could fix it in no time
Fri, 2005-09-30 09:58 — Anonymous

thanks for your help

the following is doing the same if you don't want to use perl: ipcs -s | grep apache | gawk '{ print $2 }' | xargs -n 1 ipcrm sem
Fri, 2005-09-30 08:23 — Anonymous

Re: Fix Apache - No space left on device: Couldn't create accept

[quote=carlos] Removing this semaphores immediately solved the problem. ipcs -s | grep apache | perl -e 'while (<STDIN>) { @a=split(/\s+/); print `ipcrm sem $a[1]`}' [/quote] Great. You saved my live!!! (Rebooting was not an option for me). Just my two cents. Next the equivalent with bash+textutils instead of perl (yes, I don't like perl, it's so ugly to read): for ipsemId in $(ipcs -s | grep apache | cut -f 2 -d ' '); do ipcrm $ipsemId; done Have a nice day
Wed, 2005-09-21 17:34 — Anonymous

Fix Apache - No space left on device: Couldn't create accept loc

Killing the semaphores is a nice temporary solution to this problem, but I have been dealing with it for months and I was wondering if there is a more permanent solution to the problem of memory leaks here?
Tue, 2005-08-23 09:29 — Anonymous

Thanks !!!

Hi, I've just found your webpage via Google's 2nd result on " [emerg] (28)No space left on device: Couldn't create accept lock " query. Your solution applied and Apache running again in 2 mn ! My panic is down, I promise I definitvly change my VPS webhosting. Many thanks for posting this dude ! See U.
Fri, 2005-08-12 18:51 — Anonymous

correction

Very helpful information, BUT the command line to fix the problem is not correct. The while() shold actually be while(<STDIN>). So cut-and-paste this line:  ipcs -s | grep apache | perl -e 'while (<STDIN>) { @a=split(/\s+/); print `ipcrm sem $a[1]`}' ;-)
Sat, 2005-08-13 15:37 — carlos

thanks fixed

ops didnt notice went i posted... looks like the <STDIN> got filtered.... thanks... (now updated)