Fix rpm/yum database (BDB0087 DB_RUNRECOVERY: Fatal error, run database recovery)

$ sudo yum update
error: rpmdb: BDB0113 Thread/process 11565/140378074454016 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

Fix by doing:

rpm --rebuilddb