Hi guys,

I've two hosts on my ansible configuration file. When I try to do a ping against them, and ansible can't authenticate with one of them, Ansible asks me a question:
Are you sure you want to continue connecting (yes/no)?

When my answer is 'no', ansible crashes:

/etc/ansible/hosts:
XXX.XXX.XXX
YYY.YYY.YYY

Steps to reproduce:

ansible all -m ping -u root

paramiko: The authenticity of host 'XXX.XXX.XXX.XXX' can't be established.
The ssh-rsa key fingerprint is zzzzzzzzzzzzzzzz
Are you sure you want to continue connecting (yes/no)?
no
Traceback (most recent call last):
File "/usr/local/lib/python2.7/dist-packages/ansible/runner/init.py", line 70, in _executor_hook
return_data = multiprocessing_runner._executor(host, new_stdin)
File "/usr/local/lib/python2.7/dist-packages/ansible/runner/init.py", line 378, in _executor
self.callbacks.on_unreachable(host, msg)
File "/usr/local/lib/python2.7/dist-packages/ansible/callbacks.py", line 357, in on_unreachable
display("%s | FAILED => %s" % (host, res), stderr=True, color='red', runner=self.runner)
File "/usr/local/lib/python2.7/dist-packages/ansible/callbacks.py", line 114, in display
log_flock(runner)
File "/usr/local/lib/python2.7/dist-packages/ansible/callbacks.py", line 83, in log_flock
fcntl.lockf(LOG_LOCK, fcntl.LOCK_EX)
IOError: [Errno 35] Resource deadlock avoided
yyy.yyy.yyy | success >> {
"changed": false,
"ping": "pong"
}

Ansible has been installed using pip.