Version-Release number of selected component:
fabric-1.14.0-2.fc28

Additional info:
reporter:       libreport-2.9.5
cmdline:        
crash_function: open_channel
exception_type: SSHException
executable:     /usr/bin/fab
interpreter:    python2-2.7.15-2.fc28.x86_64
kernel:         4.17.3-200.fc28.x86_64
runlevel:       N 5
type:           Python
uid:            1000

Truncated backtrace:
transport.py:895:open_channel:SSHException: Timeout opening channel.

Traceback (most recent call last):
  File "/usr/lib/python2.7/site-packages/fabric/main.py", line 757, in main
    *args, **kwargs
  File "/usr/lib/python2.7/site-packages/fabric/tasks.py", line 386, in execute
    multiprocessing
  File "/usr/lib/python2.7/site-packages/fabric/tasks.py", line 276, in _execute
    return task.run(*args, **kwargs)
  File "/usr/lib/python2.7/site-packages/fabric/tasks.py", line 173, in run
    return self.wrapped(*args, **kwargs)
  File "/media/Multimedia/Programmazione/PYTHON/software/monitoring/fabfile.py", line 385, in telecom_kill_old_sessions
    if exists("killer.sh"):
  File "/usr/lib/python2.7/site-packages/fabric/contrib/files.py", line 32, in exists
    cmd = 'stat %s' % _expand_path(path)
  File "/usr/lib/python2.7/site-packages/fabric/contrib/files.py", line 473, in _expand_path
    return path if is_win() else '"$(echo %s)"' % path
  File "/usr/lib/python2.7/site-packages/fabric/contrib/files.py", line 460, in is_win
    return '"' in run('echo "Will you echo quotation marks"')
  File "/usr/lib/python2.7/site-packages/fabric/network.py", line 687, in host_prompting_wrapper
    return func(*args, **kwargs)
  File "/usr/lib/python2.7/site-packages/fabric/operations.py", line 1090, in run
    shell_escape=shell_escape, capture_buffer_size=capture_buffer_size,
  File "/usr/lib/python2.7/site-packages/fabric/operations.py", line 930, in _run_command
    channel=default_channel(), command=wrapped_command, pty=pty,
  File "/usr/lib/python2.7/site-packages/fabric/state.py", line 435, in default_channel
    chan = _open_session()
  File "/usr/lib/python2.7/site-packages/fabric/state.py", line 420, in _open_session
    session = transport.open_session(timeout=env.timeout)
  File "/usr/lib/python2.7/site-packages/paramiko/transport.py", line 767, in open_session
    timeout=timeout)
  File "/usr/lib/python2.7/site-packages/paramiko/transport.py", line 895, in open_channel
    raise SSHException('Timeout opening channel.')
SSHException: Timeout opening channel.

Local variables in innermost frame:
kind: 'session'
window_size: 2097152
max_packet_size: 32768
m: paramiko.Message('Z\x00\x00\x00\x07session\x00\x00\x00\x04\x00 \x00\x00\x00\x00\x80\x00')
self: <paramiko.Transport at 0xe5174210L (cipher aes128-ctr, 128 bits) (active; 1 open channel(s))>
chan: <paramiko.Channel 4 -> <paramiko.Transport at 0xe5174210L (cipher aes128-ctr, 128 bits) (active; 1 open channel(s))>>
chanid: 4
start_ts: 1530772990.687376
dest_addr: None
timeout: 10
src_addr: None
event: <threading._Event object at 0x7f9ae486dd90>