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Bug 2228551

Summary: yum/dnf is broken
Product: Red Hat Enterprise Linux 8 Reporter: hasn318
Component: dnfAssignee: Packaging Maintenance Team <packaging-team-maint>
Status: CLOSED MIGRATED QA Contact: swm-qe
Severity: urgent Docs Contact:
Priority: low    
Version: 8.6CC: cstratak, james.antill, mcurlej
Target Milestone: rcKeywords: MigratedToJIRA, Triaged
Target Release: ---Flags: pm-rhel: mirror+
Hardware: Unspecified   
OS: Linux   
Whiteboard:
Fixed In Version: Doc Type: If docs needed, set a value
Doc Text:
Story Points: ---
Clone Of: Environment:
Last Closed: 2023-09-04 10:13:59 UTC Type: Bug
Regression: --- Mount Type: ---
Documentation: --- CRM:
Verified Versions: Category: ---
oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: --- Target Upstream Version:
Embargoed:

Description hasn318 2023-08-02 15:59:34 UTC
No yum/dnf commands works on RHEL 8 EC2 instance. Whatever yum/dnf command I run, I get the below error. Any help would be appreciated
yum
Traceback (most recent call last):
File "/usr/bin/yum", line 57, in
from dnf.cli import main
File "/usr/lib/python3.6/site-packages/dnf/init.py", line 22, in
import warnings
ImportError: bad magic number in 'warnings': b'a\r\r\n'

Comment 1 Miro Hrončok 2023-08-02 17:29:22 UTC
Any chance you have a file called /usr/bin/warnings.pyc ?

Comment 2 Miro Hrončok 2023-08-02 17:29:50 UTC
*** Bug 2228552 has been marked as a duplicate of this bug. ***

Comment 3 Miro Hrončok 2023-08-02 17:38:29 UTC
I can reproduce this by doing:

# echo -e 'a\r\r\n' > /usr/bin/warnings.pyc

# yum --version
Traceback (most recent call last):
  File "/usr/bin/yum", line 57, in <module>
    from dnf.cli import main
  File "/usr/lib/python3.6/site-packages/dnf/__init__.py", line 22, in <module>
    import warnings
ImportError: bad magic number in 'warnings': b'a\r\r\n'


Unless I am mistaken, this is essentially the same problem as in bz2057340 and https://github.com/benjaminp/six/issues/359

This was worked around in upstream dnf by https://github.com/rpm-software-management/dnf/pull/1815 which landed in dnf 4.11.1.

Comment 4 hasn318 2023-08-03 10:50:18 UTC
Hello,

Yes I do have a warnings file under /usr/bin on the system where yum/dnf is broken.
Should I remove that file?
Thanks

Comment 5 hasn318 2023-08-03 11:07:30 UTC
If I remove the warnings.pyc file. I am getting the below error.
yum
Traceback (most recent call last):
  File "/usr/bin/yum", line 57, in <module>
    from dnf.cli import main
  File "/usr/lib/python3.6/site-packages/dnf/__init__.py", line 23, in <module>
    import dnf.pycomp
  File "/usr/lib/python3.6/site-packages/dnf/pycomp.py", line 21, in <module>
    from gettext import NullTranslations
  File "/usr/lib64/python3.6/gettext.py", line 49, in <module>
    import locale, copy, io, os, re, struct, sys
ImportError: bad magic number in 'locale': b'a\r\r\n'

Comment 6 hasn318 2023-08-03 12:27:33 UTC
I removed all the files ending in .pyc under /usr/bin and yum/dnf is working as expected. Thanks for all the help!

Comment 9 RHEL Program Management 2023-09-04 10:13:39 UTC
Issue migration from Bugzilla to Jira is in process at this time. This will be the last message in Jira copied from the Bugzilla bug.

Comment 10 RHEL Program Management 2023-09-04 10:13:59 UTC
This BZ has been automatically migrated to the issues.redhat.com Red Hat Issue Tracker. All future work related to this report will be managed there.

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