Error Creating Semaphore No Space Left On Device
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Getting Started Home Page | Knowledge Base 24 X 7 HEROIC SUPPORT 800.580.4985 (1-517-322-0434) Find Answers To Web Hosting Questions SearchSearch Apache could not create semaphores no space left on device Error: "semget: No space left on device" Category: Technical Support If
Error No Space Left On Device Android
Apache fails, and will not successfully start again, check the error log. If you see an error
Error No Space Left On Device Linux
similar to the following, it could indicate that your server has run out of semaphores. semget: No space left on device To see how many semaphores are being
Partition Failed With The Error No Space Left On Device
used, SSH to your server as root and run the following: ipcs -s In order to get Apache started again, we must clear the semaphores. Run this for-loop to flush them: for whatever in `ipcs -s | awk '{print $2}'`; do ipcrm -s $whatever; done On older servers that command may not work. In these cases, you write error no space left on device may need to do the following: /sbin/service httpd stop
ipcs -s | grep nobody | gawk '{ print $2 }' | xargs -n 1 ipcrm sem
/sbin/service httpd start If this is a common problem for you, you may want to increase the semaphore limits on your server. You can do that by adding the following to the /etc/sysctl.conf file: # Increases the semaphore limits & extend Apache's uptime.
kernel.msgmni = 512
kernel.sem = 250 128000 32 512 Then load the new settings into the kernel: sysctl -p Note: This post assumes you are running Apache on a Linux server, are familiar with the command line, and have root access to the server. === Liquid Web's Heroic Support is always available to assist customers with this or any other issue. If you need our assistance please contact us: Toll Free 1.800.580.4985 International 517.322.0434 support@liquidweb.com https://manage.liquidweb.com/ Be Sociable, Share! Tweet Related ArticlesUnderstanding Load BalancingUpdating an A record from Command LineApache Error: Premature End of Script HeadersUpda
here for a quick overview of the site Help Center Detailed answers to any questions you might have Meta Discuss the workings and policies of this site About Us cp write error no space left on device Learn more about Stack Overflow the company Business Learn more about hiring developers or no space left on device: ah00023: couldn't create the rewrite-map mutex posting ads with us Unix & Linux Questions Tags Users Badges Unanswered Ask Question _ Unix & Linux Stack Exchange is [emerg] (28)no space left on device: couldn't create accept lock a question and answer site for users of Linux, FreeBSD and other Un*x-like operating systems. Join them; it only takes a minute: Sign up Here's how it works: Anybody can ask a question Anybody https://www.liquidweb.com/kb/apache-error-semget-no-space-left-on-device/ can answer The best answers are voted up and rise to the top Httpd : no space left on device up vote 5 down vote favorite 1 I am using Fedora 17 and over the last few days I am having an issue with my system. Whenever I try to start httpd it shows me: Error: No space left on device When I execute systemctl status httpd.service, I receive the http://unix.stackexchange.com/questions/65278/httpd-no-space-left-on-device following output: httpd.service - The Apache HTTP Server (prefork MPM) Loaded: loaded (/usr/lib/systemd/system/httpd.service; disabled) Active: inactive (dead) since Tue, 19 Feb 2013 11:18:57 +0530; 2s ago Process: 4563 ExecStart=/usr/sbin/httpd $OPTIONS -k start (code=exited, status=0/SUCCESS) CGroup: name=systemd:/system/httpd.service I tried to Google this error and all links point to clearing the semaphores. I don't think this is the issue as I tried to clear the semaphores but that didn't work. Edit 1 here is the output of df -g [root@localhost ~]# df -h Filesystem Size Used Avail Use% Mounted on rootfs 50G 16G 32G 34% / devtmpfs 910M 0 910M 0% /dev tmpfs 920M 136K 920M 1% /dev/shm tmpfs 920M 1.2M 919M 1% /run /dev/mapper/vg-lv_root 50G 16G 32G 34% / tmpfs 920M 0 920M 0% /sys/fs/cgroup tmpfs 920M 0 920M 0% /media /dev/sda1 497M 59M 424M 13% /boot /dev/mapper/vg-lv_home 412G 6.3G 385G 2% /home Here is the deatail of httpd error log [root@localhost ~]# tail -f /var/log/httpd/error_log [Tue Feb 19 11:45:53 2013] [notice] suEXEC mechanism enabled (wrapper: /usr/sbin/suexec) [Tue Feb 19 11:45:53 2013] [notice] Digest: generating secret for digest authentication ... [Tue Feb 19 11:45:53 2013] [notice] Digest: done [Tue Feb 19 11:45:54 2013] [notice] Apache/2.2.23 (Unix) DAV/2 PHP/5.4.11 configured -- resuming normal operations [Tue Feb 19 11:4
Semaphores like all IPC are used to allow different processes to communicate with each other. They are basically counters that are created, accessed and destroyed using special system calls, such as sempost(3), semwait(3), semget(2) and semop(2). See sem_overview(7) on a linux system https://linuxnlenux.wordpress.com/2013/08/11/no-space-left-on-device-couldnt-create-accept-lock-errors-semaphores/ for a brief description. The definition of communicate here is pretty primitive. "Communicate" for http://www.pc-freak.net/blog/apache-space-left-device-couldnt-create-accept-lock-fix/ semaphores means reading, incrementing or decrementing a counter via the system/library calls. I was facing same error with one of my shared server last couple of week, apache was broke on server and getting following error in apache error logs file. [emerg] (28)No space left on device: Couldn't create accept lock [notice] suEXEC mechanism no space enabled (wrapper: /usr/sbin/suexec) [notice] Digest: generating secret for digest authentication ... [notice] Digest: done [warn] pid file /etc/httpd/run/httpd.pid overwritten -- Unclean shutdown of previous Apache run? [emerg] (28)No space left on device: Couldn't create accept lock I checked disk space, or quota limit but everything was fine. I through it seem to apache semaphore problem Apache can create the “accept lock” is with a semaphore. A semaphore is an inter-process communication no space left tool that is used by Apache to communicate with it’s child processes. This error message may mean that Apache couldn’t create a new semaphore. Check to see how many semaphores are currently in use. If Apache is running correctly, you should see something like this: # ipcs -s If Apache is stopped, and you still see these semaphores, then you can safely kill them by running this command for each semaphore id (in the second column) $ ipcs -s
- Fix If out of a sudden your Apache webserver crashes and is refusing to start up by manually trying to restart it through its init script on Debian Linux servers - /etc/init.d/apache2 and RPM based ones: /etc/init.d/httpd Checking in php_error.log there was no shown errors related to loading PHP modules, however apache's error.log show following errors: [Wed Apr 08 14:20:14 2015] [error] [client 180.76.5.149] client denied by server configuration: /var/www/sploits/info/trojans_info/tr_data/y3190.html [Wed Apr 08 14:20:39 2015] [warn] pid file /var/run/apache2.pid overwritten -- Unclean shutdown of previous Apache run? [Wed Apr 08 14:20:39 2015] [emerg] (28)No space left on device: Couldn't create accept lock (/var/lock/apache2/accept.lock.15974) (5) [Wed Apr 08 14:25:39 2015] [warn] pid file /var/run/apache2.pid overwritten -- Unclean shutdown of previous Apache run? [Wed Apr 08 14:25:39 2015] [emerg] (28)No space left on device: Couldn't create accept lock (/var/lock/apache2/accept.lock.16790) (5) [Wed Apr 08 14:27:03 2015] [warn] pid file /var/run/apache2.pid overwritten -- Unclean shutdown of previous Apache run? [Wed Apr 08 14:27:03 2015] [emerg] (28)No space left on device: Couldn't create accept lock (/var/lock/apache2/accept.lock.16826) (5) [Wed Apr 08 14:27:53 2015] [warn] pid file /var/run/apache2.pid overwritten -- Unclean shutdown of previous Apache run? [Wed Apr 08 14:27:53 2015] [emerg] (28)No space left on device: Couldn't create accept lock (/var/lock/apache2/accept.lock.16852) (5) [Wed Apr 08 14:30:48 2015] [warn] pid file /var/run/apache2.pid overwritten -- Unclean shutdown of previous Apache run? [Wed Apr 08 14:30:48 2015] [emerg] (28)No space left on device: Couldn't create accept lock (/var/lock/apache2/accept.lock.17710) (5) [Wed Apr 08 14:31:21 2015] [warn] pid file /var/run/apache2.pid overwritten -- Unclean shutdown of previous Apache run? [Wed Apr 08 14:31:21 2015] [emerg] (28)No space left on device: Couldn't create accept lock (/var/lock/apache2/accept.lock.17727) (5) [Wed Apr 08 14:32:40 2015] [warn] pid file /var/run/apache2.pid overwritten -- Unclean shutdown of previ