Comment 11 for bug 1455357

Still reproduced on CI, for example:
http://jenkins-product.srt.mirantis.net:8080/view/7.0_swarm/job/7.0.system_test.ubuntu.thread_7/12/console
http://jenkins-product.srt.mirantis.net:8080/view/7.0_swarm/job/7.0.system_test.ubuntu.thread_7/10/console
http://jenkins-product.srt.mirantis.net:8080/view/7.0_swarm/job/7.0.system_test.ubuntu.thread_non_func_1/3/console

To faster investigation, you can reproduce the issue in a minute even without 'fuel-qa' repository, using just 'fuel-devops':

$ dos.py time-sync <env_name>

, if you, for example, create ~1000 instances of SSHClient ( get_admin_remote() or get_node_remote() ) here: https://github.com/stackforge/fuel-devops/blob/master/devops/helpers/helpers.py#L169-L171

It happens from time to time even with clear fuel-devops code during different requests.