_convert_status IOError: Failure on sftp.open(remote_file_path, 'r')

[SamuelRamond]

Hi,
I ran into an issue trying to open a file from a remote SFTP to local, a short version of the code is:

transport = paramiko.Transport((hostname, int(port)))
(...) Config stuff
transport.connect(**transport_config)
sftp = paramiko.SFTPClient.from_transport(transport)
with sftp.open(remote_file_path, 'r') as remote_file:
    shutil.copyfileobj(remote_file, open(local_file_path, 'w'))

This code used to work well for a time, but is failing for a few days. My guess is that the remote file is getting bigger that's why it failed but not sure why. (note that it's only 263mb)

Here is the stack trace, i don't have enough information on what is going on ?

File "/var/www/service-sftp-fetcher/releases/20180612155411/alk_service_exchange/model/fetcher.py", line 82, in fetch
    with sftp.open(remote_file_path, 'r') as remote_file:
  File "/var/www/service-sftp-fetcher/shared/env/local/lib/python2.7/site-packages/paramiko-2.4.1-py2.7.egg/paramiko/sftp_client.py", line 341, in open
    t, msg = self._request(CMD_OPEN, filename, imode, attrblock)
  File "/var/www/service-sftp-fetcher/shared/env/local/lib/python2.7/site-packages/paramiko-2.4.1-py2.7.egg/paramiko/sftp_client.py", line 780, in _request
    return self._read_response(num)
  File "/var/www/service-sftp-fetcher/shared/env/local/lib/python2.7/site-packages/paramiko-2.4.1-py2.7.egg/paramiko/sftp_client.py", line 832, in _read_response
    self._convert_status(msg)
  File "/var/www/service-sftp-fetcher/shared/env/local/lib/python2.7/site-packages/paramiko-2.4.1-py2.7.egg/paramiko/sftp_client.py", line 865, in _convert_status
    raise IOError(text)
IOError: Failure

Note: I'm using this open + copyfileobj as a fallback for a failed

sftp.get(remote_file_path, local_file_path)

cf: #926

I'm using: paramiko-2.4.1 with python 2.7

Thank for your support and for the lib 👍