Issue
We are using tox for py36 test environment setup through travis-ci, the tests start breaking in 2021-10-23.
The error that we are getting is:
$ tox
GLOB sdist-make: /home/travis/build/apache/incubator-marvin/python-toolbox/setup.py
py36 create: /home/travis/build/apache/incubator-marvin/python-toolbox/.tox/py36
ERROR: invocation failed (exit code 1), logfile: /home/travis/build/apache/incubator-marvin/python-toolbox/.tox/py36/log/py36-0.log
================================== log start ===================================
StopIteration:
=================================== log end ====================================
ERROR: InvocationError for command /home/travis/virtualenv/python3.6.7/bin/python -m virtualenv --no-download --python /home/travis/virtualenv/python3.6.7/bin/python py36 (exited with code 1)
___________________________________ summary ____________________________________
ERROR: py36: InvocationError for command /home/travis/virtualenv/python3.6.7/bin/python -m virtualenv --no-download --python /home/travis/virtualenv/python3.6.7/bin/python py36 (exited with code 1)
The command "tox" exited with 1.
The log showed that the process had failed while launching virtualenv even before package installation.
We had also tested with tox -rvve py36 for more logs:
Another log with Travis-CI Link
The test result showed that /home/travis/virtualenv/python3.6.7/bin/python does exist, and can be successfully executed.
What is weird to us is that the same setting used to be able to run without failure in 2021-10-22:
Previous log with Travis-CI Link
And the only difference seem to be the version change of virtualenv, which is changing from 20.8.1 to 20.9.0 or 20.10.0.
Does anyone know how this can be fixed?
Solution
After some experiments, we found that there are many dependencies that could be the cause of this error.
For our case, it is the OpenSSL version in the Ubuntu.
https://github.com/apache/incubator-marvin/pull/59
Answered By - Wei Chen Answer Checked By - Willingham (WPSolving Volunteer)