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TimeoutError('Timed out reading from transport') for Junos

See original GitHub issue

Scrapli works well for cases when configuration is error free, but if there is a typo - it will hang for a while untill Timeout is reached, but the session would be still connected

Here is a basic configuration that I used:

from scrapli.driver.core import JunosDriver my_device = { “host”: “”, “auth_username”: “test”, “auth_password”: “~!QAZXSW@”, “auth_strict_key”: False } conn = JunosDriver(**my_device) print(conn.send_command(“configure exclusive”).result) commands = [“set system services ssh”,“set system services nestconf ssh”] for command in commands: print("sending line - "+command) response = conn.send_config(command, strip_prompt=False) print(response.result) conn.close()

To Reproduce Steps to reproduce the behavior:

  1. run the script with several commands and one of them should contain typo
  2. Junos vMX with VCP/VFP v 17.2R1.13

Expected behavior I would expect to have it like “set system services nestconfssh” as Junos parser would not recognize command and get an error from parser, but I don’t see that command was ever entered (by using - “show log interactive-commands” on vMX)

Stack Trace

/home/python/PycharmProjects/config_deploy/venv/bin/python /home/python/PycharmProjects/config_deploy/
warning: uncommitted changes will be discarded on exit
Entering configuration mode

sending line - set system services ssh
sending line - set system services nestconf ssh
Traceback (most recent call last):
  File "/home/python/PycharmProjects/config_deploy/", line 16, in <module>
    response = conn.send_config(command, strip_prompt=False)
  File "/home/python/PycharmProjects/config_deploy/venv/lib/python3.8/site-packages/scrapli/driver/", line 392, in send_config
    multi_response = self.send_configs(
  File "/home/python/PycharmProjects/config_deploy/venv/lib/python3.8/site-packages/scrapli/driver/", line 445, in send_configs
    response = super().send_command(
  File "/home/python/PycharmProjects/config_deploy/venv/lib/python3.8/site-packages/scrapli/driver/", line 75, in send_command
    raw_response, processed_response =
  File "/home/python/PycharmProjects/config_deploy/venv/lib/python3.8/site-packages/scrapli/channel/", line 165, in send_input
    raw_result, processed_result = self._send_input(
  File "/home/python/PycharmProjects/config_deploy/venv/lib/python3.8/site-packages/scrapli/", line 77, in timeout_wrapper
    return future.result()
  File "/usr/lib/python3.8/concurrent/futures/", line 432, in result
    return self.__get_result()
  File "/usr/lib/python3.8/concurrent/futures/", line 388, in __get_result
    raise self._exception
  File "/usr/lib/python3.8/concurrent/futures/", line 57, in run
    result = self.fn(*self.args, **self.kwargs)
  File "/home/python/PycharmProjects/config_deploy/venv/lib/python3.8/site-packages/scrapli/channel/", line 192, in _send_input
  File "/home/python/PycharmProjects/config_deploy/venv/lib/python3.8/site-packages/scrapli/channel/", line 82, in _read_until_input
    output += self._read_chunk()
  File "/home/python/PycharmProjects/config_deploy/venv/lib/python3.8/site-packages/scrapli/channel/", line 47, in _read_chunk
    new_output =
  File "/home/python/PycharmProjects/config_deploy/venv/lib/python3.8/site-packages/scrapli/", line 104, in requires_open_session_wrapper
    return wrapped_func(*args, **kwargs)
  File "/home/python/PycharmProjects/config_deploy/venv/lib/python3.8/site-packages/scrapli/", line 76, in timeout_wrapper
    raise TimeoutError(message)
TimeoutError: Timed out reading from transport


  • OS: Ubuntu 20.04
  • scrapli version 2020.7.12

Issue Analytics

  • State:closed
  • Created 3 years ago
  • Comments:15 (8 by maintainers)

github_iconTop GitHub Comments

carlmontanaricommented, Jul 19, 2020

updated develop branch with the fix. still doing some testing locally but I think it should be good to try!

carlmontanaricommented, Jul 19, 2020

Hopefully I’ll merge/release next weekend – I’ve got a few other things I’m working on I’d like to include in the next release!

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