[error] (28)No space left on device: Cannot create SSLMutex Apache Solution Linux CentOS Ubuntu Debian Mint

Have you got this error from Apache?

[notice] suEXEC mechanism enabled (wrapper: /usr/sbin/suexec)
[error] (28)No space left on device: Cannot create SSLMutex

At first glance it appears that you may be out of disk space but the issue is ipc or interprocess communication.

This will clear out the ipcs processes so things can work, this often happens during high traffic and may be a sign of DDOS.

The command below will fix it, it will list all of the ipcs processes that belong to your apache user (change the part in bold to whatever apache runs as) and then

ipcs -s | grep YOURAPACHEuser | awk '{ print $2 }' | xargs -n 1 ipcrm -s

The above should fix it, but if you're curious here is the raw output of ipcs -s on a random VM.

------ Semaphore Arrays --------
key        semid      owner      perms      nsems     
0x00000000 0          root       600        1         
0x00000000 65537      root       600        1         
0x00000000 1081346    apache     600        1         
0x00000000 1114115    apache     600        1  

That's why we do awk on the second column to get the semid, and then we pipe to xargs which then uses the ipcrm -s command to remove all of the semid's that we found.


Tags:

sslmutex, apache, linux, centos, ubuntu, debian, minthave, suexec, mechanism, enabled, wrapper, usr, sbin, glance, disk, ipc, interprocess, communication, ipcs, processes, ddos, user, bold, grep, yourapacheuser, awk, xargs, ipcrm, output, vm, semaphore, arrays, semid, perms, nsems, column,

Latest Articles

  • How to resize a pdf without losing much quality in Linux Mint Ubuntu Debian Redhat Solution
  • qemu: could not load PC BIOS 'bios-256k.bin' solution
  • Proxmox How To Custom Partition During Install
  • Hyper-V Linux VM Boots to Black Screen, Storage, NIC Not Found Issues
  • Ubuntu Mint How to Fix Missing/Broken /dev and /dev/pts which causes terminal to immediately close exit and not work
  • How high can a Xeon CPU get?
  • bash fix PATH environment variable "command not found" solution
  • Ubuntu Linux Mint Debian Redhat Youtube Cannot Play HD or 4K videos, dropped frames or high CPU usage with Nvidia or AMD Driver
  • hostapd example configuration for high speed AC on 5GHz using WPA2
  • hostapd how to enable and use WPS to connect wireless devices like printers
  • Dell Server Workstation iDRAC Dead after Firmware Update Solution R720, R320, R730
  • Cloned VM/Server/Computer in Linux won't boot and goes to initramfs busybox Solution
  • How To Add Windows 7 8 10 11 to GRUB Boot List Dual Booting
  • How to configure OpenDKIM on Linux with Postfix and setup bind zonefile
  • Debian Ubuntu 10/11/12 Linux how to get tftpd-hpa server setup tutorial
  • efibootmgr: option requires an argument -- 'd' efibootmgr version 15 grub-install.real: error: efibootmgr failed to register the boot entry: Operation not permitted.
  • Apache Error Won't start SSL Cert Issue Solution Unable to configure verify locations for client authentication SSL Library Error: 151441510 error:0906D066:PEM routines:PEM_read_bio:bad end line SSL Library Error: 185090057 error:0B084009:x509 certif
  • Linux Debian Mint Ubuntu Bridge br0 gets random IP
  • redis requirements
  • How to kill a docker swarm