Version-Release number of selected component:
yum-cron-3.4.3-505.fc22

Additional info:
reporter:       libreport-2.6.0
cmdline:        /usr/bin/python -tt /usr/sbin/yum-cron /etc/yum/yum-cron-hourly.conf
dso_list:       yum-3.4.3-505.fc22.noarch
executable:     /usr/sbin/yum-cron
kernel:         4.0.5-300.fc22.x86_64
runlevel:       N 5
type:           Python
uid:            0

Truncated backtrace:
rpmsack.py:93:_get_hdr:PackageSackError: Rpmdb changed underneath us

Traceback (most recent call last):
  File "/usr/sbin/yum-cron", line 713, in <module>
    main()
  File "/usr/sbin/yum-cron", line 710, in main
    base.updatesCheck()
  File "/usr/sbin/yum-cron", line 616, in updatesCheck
    self.findDeps()
  File "/usr/sbin/yum-cron", line 503, in findDeps
    (res, resmsg) = self.buildTransaction()
  File "/usr/lib/python2.7/site-packages/yum/__init__.py", line 1214, in buildTransaction
    (rescode, restring) = self.resolveDeps()
  File "/usr/lib/python2.7/site-packages/yum/depsolve.py", line 915, in resolveDeps
    for po, dep in self._checkFileRequires():
  File "/usr/lib/python2.7/site-packages/yum/depsolve.py", line 1206, in _checkFileRequires
    self.installedFileProviders = self.rpmdb.fileRequiresData()
  File "/usr/lib/python2.7/site-packages/yum/rpmsack.py", line 970, in fileRequiresData
    for name, flag, evr in pkg.requires:
  File "/usr/lib/python2.7/site-packages/yum/packages.py", line 678, in <lambda>
    requires = property(fget=lambda self: self.returnPrco('requires'))
  File "/usr/lib/python2.7/site-packages/yum/packages.py", line 1435, in returnPrco
    self._populatePrco()
  File "/usr/lib/python2.7/site-packages/yum/packages.py", line 1474, in _populatePrco
    hdr = self._get_hdr()
  File "/usr/lib/python2.7/site-packages/yum/rpmsack.py", line 93, in _get_hdr
    raise Errors.PackageSackError, 'Rpmdb changed underneath us'
PackageSackError: Rpmdb changed underneath us

Local variables in innermost frame:
self: <RPMInstalledPackage : file-libs-5.22-3.fc22.x86_64 (0x7f06cb18b2d0)>
mi: <rpm.mi object at 0x7f06c8524ad0>
ts: <rpmUtils.transaction.TransactionWrapper instance at 0x7f06cae9dcb0>

Potential duplicate: bug 1040033