打开软件升级程序,报错

Traceback (most recent call last):
  File "/usr/lib/python2.7/site-packages/yumexbackend/yum_server.py", line 1504, in dispatcher
    self.parse_command(args[0], args[1:])
  File "/usr/lib/python2.7/site-packages/yumexbackend/yum_server.py", line 1428, in parse_command
    self.get_packages(args[0], args[1], args[2])
  File "/usr/lib/python2.7/site-packages/yumexbackend/yum_server.py", line 625, in get_packages
    ygh = self.yumbase.doPackageLists(pkgnarrow=narrow, showdups=show_dupes)
  File "/usr/lib/python2.7/site-packages/yum/__init__.py", line 2953, in doPackageLists
    for (n,a,e,v,r) in self.up.getUpdatesList():
  File "/usr/lib/python2.7/site-packages/yum/__init__.py", line 1101, in <lambda>
    up = property(fget=lambda self: self._getUpdates(),
  File "/usr/lib/python2.7/site-packages/yum/__init__.py", line 846, in _getUpdates
    self._up = rpmUtils.updates.Updates(self.rpmdb.simplePkgList(), self.pkgSack.simplePkgList())
  File "/usr/lib/python2.7/site-packages/yum/rpmsack.py", line 512, in simplePkgList
    return self.pkglist
  File "/usr/lib/python2.7/site-packages/yum/rpmsack.py", line 269, in _get_pkglist
    csumpkgtups = self.preloadPackageChecksums(load_packages=False)
  File "/usr/lib/python2.7/site-packages/yum/rpmsack.py", line 1066, in preloadPackageChecksums
    rpmdbv = self.simpleVersion(main_only=True)[0]
  File "/usr/lib/python2.7/site-packages/yum/rpmsack.py", line 1225, in simpleVersion
    if 'checksum_type' in ydbi and 'checksum_data' in ydbi:
  File "/usr/lib/python2.7/site-packages/yum/rpmsack.py", line 1935, in __contains__
    x = self.get(attr)
  File "/usr/lib/python2.7/site-packages/yum/rpmsack.py", line 1965, in get
    res = self._read(attr)
  File "/usr/lib/python2.7/site-packages/yum/rpmsack.py", line 1880, in _read
    info = misc.stat_f(fn, ignore_EACCES=True)
  File "/usr/lib/python2.7/site-packages/yum/misc.py", line 960, in stat_f
    return os.stat(filename)
OSError: [Errno 5] 输入/输出错误: '/var/lib/yum/yumdb/l/ada1dbd6b45f2a57b768cebbbd1344f901c00456-libobjc-4.9.4-16.fc21.loongson.18-mips64el/checksum_type'
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