[IMPALA-13558] Work around bad Ubuntu 20.04 python 2.7 update

• Type: Bug
• Status: Open
• Priority: Blocker
• Resolution: Unresolved
• Affects Version/s: Impala 4.5.0
• Component/s: Infrastructure
• Epic Color: ghx-label-5
• Assignee: Unassigned
• Reporter: Joe McDonnell
• Created: 1 week ago 01:10
• Updated: 1 week ago 09:30

Description

Ubuntu 20.04 introduced a bug in their Python 2.7's tarfile functionality with 2.7.18-1~20.04.5 (see https://bugs.launchpad.net/ubuntu/+source/python2.7/+bug/2089071 ). This breaks Impala builds with a message like this:

Traceback (most recent call last):
  File "bin/../infra/python/bootstrap_virtualenv.py", line 521, in <module>
    setup_virtualenv_if_not_exists(venv_dir, options.python3)
  File "bin/../infra/python/bootstrap_virtualenv.py", line 482, in setup_virtualenv_if_not_exists
    create_virtualenv(venv_dir, is_py3)
  File "bin/../infra/python/bootstrap_virtualenv.py", line 138, in create_virtualenv
    file = tarfile.open(virtualenv_tarball, "r:gz")
  File "/usr/lib/python2.7/tarfile.py", line 1708, in open
    return func(name, filemode, fileobj, **kwargs)
  File "/usr/lib/python2.7/tarfile.py", line 1762, in gzopen
    t = cls.taropen(name, mode, fileobj, **kwargs)
  File "/usr/lib/python2.7/tarfile.py", line 1738, in taropen
    return cls(name, mode, fileobj, **kwargs)
  File "/usr/lib/python2.7/tarfile.py", line 1602, in __init__
    self.firstmember = self.next()
  File "/usr/lib/python2.7/tarfile.py", line 2385, in next
    raise ReadError(str(e))
tarfile.ReadError: invalid header

We need to work around this issue to unblock precommit. On the Ubuntu bug listed above, there is a workaround tarfile.py that could be copied into place.