Rawhide updated breaks yum

[Peter Robinson]

On Sat, Jun 30, 2012 at 2:11 PM, Richard W.M. Jones <rjones at redhat.com> wrote:
>
> Somehow it's possible to update rpm but not yum and break Rawhide,
> using just 'yum' commands, not rpm directly and no forced installs.
> Anyway my machine now says:
>
> $ sudo yum install yum
> error: db5 error(-30969) from dbenv->open: BDB0091 DB_VERSION_MISMATCH: Database environment version mismatch
> error: cannot open Packages index using db5 -  (-30969)
> error: cannot open Packages database in /var/lib/rpm
> CRITICAL:yum.main:
>
> Error: rpmdb open failed
>
> 'rpm -qa' is fine.
>
> I hope I'll be able to rpm -U the appropriate yum or rpmlib or
> whatever to fix this, but be warned ...

The following should fix the issue
rm -rf /var/lib/rpm/__*
rpm --rebuilddb