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Interesting bug encountered today after a fresh install of RHEL5 from 5.3 media.When attempting to run the command, 'yum'. The following error was presented:# yum
Traceback (most recent call last):
File "/usr/bin/yum", line 4, in ?
import yum
File "/usr/lib/python2.4/site-packages/yum/__init__.py", line 30, in ?
import logging
ValueError: bad marshal dataTo correct this issue, I first needed to determine if the problem was with yum, or something else. So I created a simple python script:#!/usr/bin/python
import loggingActually, really simple. This helped me isolate the issue.When running this program I was presented with the same error message:Traceback (most recent call last):
File "test.py", line 1, in ?
import logging
ValueError: bad marshal data
So I wondered, what could cause this corruption. Maybe the installation had a corrupt package installed. rpm verification to double check.# rpm -Va python
.M...U.. /usr/lib64/python2.4/aifc.py
..5..... /usr/lib64/python2.4/logging/__init__.pycSo I though, maybe somehow the .pyc file became corrupt. So lets just delete this file, since it is only a byte-compiled file that will be re-generated on-demand.And, well, that was the solution:# rm /usr/lib64/python2.4/logging/__init__.pycThe problem is now resolved.The RPM of python that was installed: python-2.4.3-24.el5.x86_64.rpm