Comment 2 for bug 1441745

It is true that this particular sub-case of the bug title has only one patch responsible, there are many other patches shown in logstash that could not possibly cause this problem but which experience it. So this seems to be a problem that can randomly impact any patch. Though it may be difficult to find, it seems to me there is a bug here. The other possibility is that tempest is trying to create too many vms. I'm not sure how many tiny vms are expected to be supported by our devstack.