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yum update results in python IndexError

Hello.

I haven't been able to update my system as of late, because yum keeps giving me the same error, everytime I try to run updates/install packages.

Code:

Running Transaction

Traceback (most recent call last):

  File "/usr/bin/yum", line 29, in <module>

    yummain.user_main(sys.argv[1:], exit_code=True)

  File "/usr/share/yum-cli/yummain.py", line 254, in user_main

    errcode = main(args)

  File "/usr/share/yum-cli/yummain.py", line 192, in main

    return_code = base.doTransaction()

  File "/usr/share/yum-cli/cli.py", line 496, in doTransaction

    resultobject = self.runTransaction(cb=cb)

  File "/usr/lib/python2.6/site-packages/yum/__init__.py", line 1182, in runTransaction

    self.rpmdb.transactionResultVersion(self.tsInfo.futureRpmDBVersion())

  File "/usr/lib/python2.6/site-packages/yum/transactioninfo.py", line 580, in futureRpmDBVersion

    self.rpmdb.preloadPackageChecksums()

  File "/usr/lib/python2.6/site-packages/yum/rpmsack.py", line 749, in preloadPackageChecksums

    pkg = self.searchNevra(n, e, v, r, a)[0]

IndexError: list index out of range

Running it with -v did not provide any other information regarding this problem. I tried running yum -clean all as well as package-cleanup --dupes and other various forms and rpm -Va --nodeps --nofiledigest but didn't get any output.

I have no idea where to work on that error, so I appreciate any help given.

It is important to know what was the last thing you did before this error occurred. Have you installed/updated anything recently? Look in /var/log/yum.log.

Try "yum reinstall yum".

The last thing I did was an update of my whole system on May 25. The only new things that were installed were a new kernel and mplayer-common.

reinstall yum gives me the same error.

I forgot to ask what version you are running now. Please also give us the current kernel number ( "uname -r"), and the output of the "rpm -qa yum python yum-*".

And please can you try running with the older kernel? You can choose it on the boot menu.

Also what comes to mind is to run yum without any plugins: "yum update --disableplugin=*"

If you were able to install yum-utils package, I would suggest runing "yum-complete-transaction" command.

I'm currently running kernel 2.6.32.12-115.fc12.i686.PAE.

Output of rpm -qa yum python yum-*:

Code:

yum-3.2.27-3.fc12.noarch

yum-metadata-parser-1.1.2-14.fc12.i686

python-2.6.2-4.fc12.i686

yum-utils-1.1.26-1.fc12.noarch

Trying to update on two different older kernels still didn't fix the issue and yum-complete-transaction tells me that there are no unfinished transactions.

Thank you for your help so far.

Please join Yum mail list (yum@lists.baseurl.org) and present your problem there. I was hopping that someone will jump in, but the best thing is to ask on the yum mailing list, with all the info posted here.

Updating my system to F13 with preupgrade has fixed the problem. I still have no idea what exactly was going on, but apparently I couldn't even install packages manually with rpm. But now everything's fine again.