Comment 2 for bug 1536314

Also there is a such traceback displayed after traceback mentioned in bug description for several jobs:

Exception in thread Thread-13 (most likely raised during interpreter shutdown):
Traceback (most recent call last):
  File "/usr/lib/python2.7/threading.py", line 810, in __bootstrap_innerException in thread Thread-37 (most likely raised during interpreter shutdown):Exception in thread Thread-45 (most likely raised during interpreter shutdown):
Traceback (most recent call last):
  File "/usr/lib/python2.7/threading.py", line 810, in __bootstrap_inner
  File "/home/jenkins/venv-nailgun-tests-2.9/local/lib/python2.7/site-packages/paramiko/transport.py", line 1777, in run
<type 'exceptions.AttributeError'>: 'NoneType' object has no attribute 'error'

 Exception in thread Thread-21 (most likely raised during interpreter shutdown):
  File "/home/jenkins/venv-nailgun-tests-2.9/local/lib/python2.7/site-packages/paramiko/transport.py", line 1777, in runException in thread Thread-29 (most likely raised during interpreter shutdown):

Traceback (most recent call last):Traceback (most recent call last):
Traceback (most recent call last): File "/usr/lib/python2.7/threading.py", line 810, in __bootstrap_inner

  File "/usr/lib/python2.7/threading.py", line 810, in __bootstrap_inner

  File "/usr/lib/python2.7/threading.py", line 810, in __bootstrap_inner

  File "/home/jenkins/venv-nailgun-tests-2.9/local/lib/python2.7/site-packages/paramiko/transport.py", line 1777, in run+ ec=1

I don't think, that it's different bug, so I did not create one more bug for this issue.