DB_RUNRECOVERY: Fatal error, run database recovery

Error message:
# yum install vpnc

rpmdb: Thread/process 4486/3078768320 failed: Thread died in Berkeley DB library
error: db4 error(-30974) from dbenv->failchk: DB_RUNRECOVERY: Fatal error, run database recovery
error: cannot open Packages index using db3 - (-30974)
error: cannot open Packages database in /var/lib/rpm
CRITICAL:yum.main:

How to resolve a problem:

# rm -f /var/lib/rpm/__db*