UnexpectedExit Exit code: None from invoke.run

[jdonnelly-apixio]

Hey,

I am using centos 7, python3.6.8, invoke 1.4.0 and I am getting a weird intermittent UnexpectedExit error when using run from invoke. I've tried digging through an strace, but I couldn't find any pattern with the ones that fail or anything else interesting. For the process that was said to have returned an exit code of None, I confirmed it exits with 0 in the strace output.
Is there any other info that would be useful?

To reproduce, I just run:

import traceback
import time
import datetime
from invoke import run
error_count = 0
for i in range(0,10000):
    time.sleep(0.15)
    print(str(datetime.datetime.now()) + " - " + str(time.time()) + " - on attempt: " + str(i))
    try:
        result = run("rm -f /tmp/idfkidfk")
        if result.return_code != 0:
            raise Exception("WTF!!!!")
    except Exception as e:
        print(str(datetime.datetime.now()) + " - " + str(time.time()) + " - Hit exception:\n" + traceback.format_exc())
        error_count += 1

And it seems to throw one of these every few hundred attempts or so:

2020-01-28 18:20:11.132695 - 1580264411.1327217 - on attempt: 307
2020-01-28 18:20:11.307360 - 1580264411.3073883 - on attempt: 308
2020-01-28 18:20:11.483637 - 1580264411.4836638 - on attempt: 309
2020-01-28 18:20:11.497629 - 1580264411.4976513 - Hit exception:
Traceback (most recent call last):
  File "idfk.py", line 10, in <module>
    result = run("rm -f /tmp/idfkidfk")
  File "/root/.pyenv/versions/3.6.8/lib/python3.6/site-packages/invoke/__init__.py", line 48, in run
    return Context().run(command, **kwargs)
  File "/root/.pyenv/versions/3.6.8/lib/python3.6/site-packages/invoke/context.py", line 94, in run
    return self._run(runner, command, **kwargs)
  File "/root/.pyenv/versions/3.6.8/lib/python3.6/site-packages/invoke/context.py", line 101, in _run
    return runner.run(command, **kwargs)
  File "/root/.pyenv/versions/3.6.8/lib/python3.6/site-packages/invoke/runners.py", line 363, in run
    return self._run_body(command, **kwargs)
  File "/root/.pyenv/versions/3.6.8/lib/python3.6/site-packages/invoke/runners.py", line 422, in _run_body
    return self.make_promise() if self._asynchronous else self._finish()
  File "/root/.pyenv/versions/3.6.8/lib/python3.6/site-packages/invoke/runners.py", line 489, in _finish
    raise UnexpectedExit(result)
invoke.exceptions.UnexpectedExit: Encountered a bad command exit code!

Command: 'rm -f /tmp/idfkidfk'

Exit code: None

Stdout: already printed

Stderr: already printed

2020-01-28 18:20:11.648929 - 1580264411.6489484 - on attempt: 310
2020-01-28 18:20:11.823539 - 1580264411.8235662 - on attempt: 311

Thanks,
Jon

[florisla]

This seems to be the same error as #683 and #660 .

This is fixed in master and will be part of the next release. It affects released versions 1.3.0 and 1.4.0 .

You can revert to version 1.2.0 to check.

pip install "invoke !=1.3.0 , !=1.4.0"

[bitprophet]

@florisla is correct, this is about to get a bugfix release, please watch #660. Thanks!

[jdonnelly-apixio]

Thanks!