py27: dvc push to SSH throws TypeError

Python 2.7 DVC version: 0.52.1

To reproduce:

virtualenv --python=python2.7 .venv
pip install 'dvc[ssh]'
dvc init --no-scm --force
dvc remote add ssh ssh://<your-ssh>
for x in {1..3}; do echo $x > "data/${x}.txt"; done
dvc add data
dvc push -r ssh

Output:

Preparing to upload data to 'ssh://mroutis@104.248.78.4/home/mroutis/cache'
Preparing to collect status from ssh://mroutis@104.248.78.4/home/mroutis/cache
Collecting information from local cache...
[##############################] 100%

Collecting information from remote cache...
[##############################] 100%
[##############################] 100% Analysing status
[                              ] ?% data/3.txt
ERROR: failed to upload '.dvc/cache/6d/7fce9fee471194aa8b5b6e47267f03' to 'ssh://mroutis@104.248.78.4/home/mroutis/cache/6d/7fce9fee471194aa8b5b6e47267f03' - ChannelException(1, 'Administratively prohibited')

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[##############################] 100% data/2.txt
[##############################] 100% data
[##############################] 100% data/1.txt
[##############################] 100% data/2.txt
[##############################] 100% data
[##############################] 100% data/1.txt

ERROR: failed to push data to the cloud - 1 file(s) failed to upload

Having any troubles?. Hit us up at https://dvc.org/support, we are always happy to help!
Exception TypeError: 'super() argument 1 must be type, not None' in <bound method SSHPool.__del__ of <dvc.remote.ssh.pool.SSHPool object at 0x7f9b346f2050>> ignored

Then, if I do dvc push -r ssh again to push the remaining file (data/3.txt):

Preparing to upload data to 'ssh://mroutis@104.248.78.4/home/mroutis/cache'
Preparing to collect status from ssh://mroutis@104.248.78.4/home/mroutis/cache
Collecting information from local cache...
[##############################] 100%

Collecting information from remote cache...
[##############################] 100%
[##############################] 100% Analysing status
[##############################] 100% data/3.txt
[##############################] 100% data/3.txt
Exception Unhandled exception in thread started by
Traceback (most recent call last):
TypeError: 'super(  File "/usr/lib64/python2.7/threading.py", line 774, in __bootstrap
) argument 1 must be type, not None'    self.__bootstrap_inner()
  File "/usr/lib64/python2.7/threading.py", line 814, in __bootstrap_inner
     in <bound method SSHPool.__del__ of <dvc.remote.ssh.pool.SSHPool object at 0x7fc043a70710>> ignored
(self.name, _format_exc()))
  File "/usr/lib64/python2.7/traceback.py", line 241, in format_exc
    etype, value, tb = sys.exc_info()
AttributeError: 'NoneType' object has no attribute 'exc_info'

[Suor]

Since confusing messages and error hiding is resolved in #2288 and the original issue is a misconfigured SSH, I close it in favor or #2292.

[darabi]

The underlying problem is an error opening the sftp connection which is clearly visible when I use paramiko directly:

Traceback (most recent call last):
  File "sftp_stat.py", line 24, in <module>
    sftp = paramiko.SFTPClient.from_transport(transport)
  File "/opt/python-env/python3/lib/python3.6/site-packages/paramiko/sftp_client.py", line 169, in from_transport
    chan.invoke_subsystem("sftp")
  File "/opt/python-env/python3/lib/python3.6/site-packages/paramiko/channel.py", line 72, in _check
    return func(self, *args, **kwds)
  File "/opt/python-env/python3/lib/python3.6/site-packages/paramiko/channel.py", line 283, in invoke_subsystem
    self._wait_for_event()
  File "/opt/python-env/python3/lib/python3.6/site-packages/paramiko/channel.py", line 1226, in _wait_for_event
    raise e
paramiko.ssh_exception.SSHException: Channel closed.

It would be nice to have all exceptions surface at the command line and of course batch_exists should not continue in case of an sftp error.

With that SSHException right in front of me, I would have realised that my server is not configured for sftp (I implicitly assumed that dvc would use scp for file transfer).