If you are getting a similar error from yum similar to the one below, it looks like yum is broken in your system.
error: rpmdb: BDB0113 Thread/process 2196/139984719730496 failed: BDB1507 Thread died in Berkeley DB library error: db5 error(-30973) from dbenv->failchk: BDB0087 DB_RUNRECOVERY: Fatal error, run database recovery error: cannot open Packages index using db5 - (-30973) error: cannot open Packages database in /var/lib/rpm CRITICAL:yum.main: Error: rpmdb open failed
Here’s the fix.
mv /var/lib/rpm/__db* /tmp yum clean all
Run your yum commands. The errors should be gone.