I had a look at this and this caused by libvirt in src/lxc/lxc_driver.c:
545 if (virCgroupForDomain(driver->cgroup, vm->def->name, &cgroup, 0)
!= 0) {
546 lxcError(VIR_ERR_INTERNAL_ERROR,
547 _("Unable to get cgroup for %s"), vm->def->name);
548 goto cleanup;
549 }
I am not exactly sure what happened here, when the domain got created,
it didnt register with cgroups maybe James switch from kvm to lxc when
this happened (in this case), but I have seen it other cases when
libvirt is a bit racey when creating the lxc domains.
** Changed in: libvirt (Ubuntu)
Status: New => Confirmed
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https://bugs.launchpad.net/bugs/842845
Title:
problems starting multiple lxc instances concurrently
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