Comment 49 for bug 1436414

I've tried to reproduce the issue using the following steps:
root@node-6:~# ip netns | grep -c qdhcp
3
 * Create 2k namespaces:
   for i in {1000..2999}; do ip netns add "qdhcp-6a6302b1-37a7-4142-a11d-5be2778f$i" ; done
 * Run q-agent-cleanup:
   neutron-netns-cleanup --config-file=/etc/neutron/neutron.conf --config-file=/etc/neutron/dhcp_agent.ini
after command execution:
root@node-6:~# ip netns | grep -c qdhcp
2003
from /var/log/neutron/neutron-netns-cleanup.log on node-6: http://paste.openstack.org/show/474018/