> On 22 Dec 2016, at 09:10, jdow <[log in to unmask]> wrote:
> 
> # yum install epel-release
> ....
> Transaction test succeeded
> Running transaction
> Traceback (most recent call last):
>  File "/bin/yum", line 29, in <module>
>    yummain.user_main(sys.argv[1:], exit_code=True)
>  File "/usr/share/yum-cli/yummain.py", line 365, in user_main
>    errcode = main(args)
>  File "/usr/share/yum-cli/yummain.py", line 271, in main
>    return_code = base.doTransaction()
>  File "/usr/share/yum-cli/cli.py", line 773, in doTransaction
>    resultobject = self.runTransaction(cb=cb)
>  File "/usr/lib/python2.7/site-packages/yum/__init__.py", line 1736, in runTransaction
>    if self.fssnap.available and ((self.conf.fssnap_automatic_pre or
>  File "/usr/lib/python2.7/site-packages/yum/__init__.py", line 1126, in <lambda>
>    fssnap = property(fget=lambda self: self._getFSsnap(),
>  File "/usr/lib/python2.7/site-packages/yum/__init__.py", line 1062, in _getFSsnap
>    devices=devices)
>  File "/usr/lib/python2.7/site-packages/yum/fssnapshots.py", line 158, in __init__
>    self._vgnames = _list_vg_names() if self.available else []
>  File "/usr/lib/python2.7/site-packages/yum/fssnapshots.py", line 56, in _list_vg_names
>    names = lvm.listVgNames()
> lvm.LibLVMError: (0, '')

I saw similar errors on one SL7.2 system after applying the security updates from 7.3. Any lvmetad segfaults in your logs?

Eventually (I think after a couple of restarts of lvm2-lvmetad), the problem downgraded itself to a message "lvmetad: WARNING: Ignoring unsupported value for cmd." being logged whenever yum installs or updates anything and lvmetad is running. Still a bit scary, but yum works. And most of the time starting lvmetad seems to fail ayway...

> 
> Can't get EPEL to install.
> 
> {^_^}

-- 
Stephan Wiesand
DESY -DV-
Platanenallee 6
15738 Zeuthen, Germany