libvirtd might abort when virsh is run repeatedly under extreme loads.

Issue

• libvirtd might abort when virsh with either of the following options is run repeatedly on a host and guest which load is extremely high due to Unixbench.

  • nodeinfo
  • domuuid
  • domid
  • dumpxml
  • domstate

• virsh run under the above condition aborts with the following error message.

# cat /var/log/messages
Jun 15 16:20:37 tx300s4-2 abrt[4797]: saved core dump of pid 2262 (/usr/sbin/libvirtd)
       to /var/spool/abrt/ccpp-1276586437-2262.new/coredump (98840576 bytes)
Jun 15 16:20:37 tx300s4-2 abrtd: Directory 'ccpp-1276586437-2262' creation detected
Jun 15 16:20:37 tx300s4-2 libvirtd: Could not find keytab file: /etc/libvirt/krb5.tab:
       No such file or directory
Jun 15 16:20:37 tx300s4-2 abrtd: New crash /var/spool/abrt/ccpp-1276586437-2262,processing

• Step to Reproduce:

  1. Make a host load as high as possible.
  2. Make 4 guests load as high as possible.
  3. Run all of the following commands repeatedly on each guest.

  # virsh nodeinfo
  # virsh domuuid <domain-name-or-id>
  # virsh domid <domain-name-or-uuid>
  # virsh dumpxml <domain-id>
  # virsh domstate <domain-id>