Unable to update package using yum

Issue

• Unable to update or list package using yum, it fails with following error

  # yum list
  Loaded plugins: rhnplugin, security
  Traceback (most recent call last):
    File "/usr/bin/yum", line 29, in ?
      yummain.user_main(sys.argv[1:], exit_code=True)
    File "/usr/share/yum-cli/yummain.py", line 309, in user_main
      errcode = main(args)
    File "/usr/share/yum-cli/yummain.py", line 178, in main
      result, resultmsgs = base.doCommands()
    File "/usr/share/yum-cli/cli.py", line 345, in doCommands
      self._getTs(needTsRemove)
    File "/usr/lib/python2.4/site-packages/yum/depsolve.py", line 101, in _getTs
      self._getTsInfo(remove_only)
    File "/usr/lib/python2.4/site-packages/yum/depsolve.py", line 112, in _getTsInfo
      pkgSack = self.pkgSack
    File "/usr/lib/python2.4/site-packages/yum/__init__.py", line 661, in <lambda>
      pkgSack = property(fget=lambda self: self._getSacks(),
    File "/usr/lib/python2.4/site-packages/yum/__init__.py", line 501, in _getSacks
      self.repos.populateSack(which=repos)
    File "/usr/lib/python2.4/site-packages/yum/repos.py", line 260, in populateSack
      sack.populate(repo, mdtype, callback, cacheonly)
    File "/usr/lib/python2.4/site-packages/yum/yumRepo.py", line 190, in populate
      dobj = repo_cache_function(xml, csum)
    File "/usr/lib64/python2.4/site-packages/sqlitecachec.py", line 42, in getPrimary
      self.repoid))
  TypeError: Parsing primary.xml error: Start tag expected, '<' not found