When installing packages via yum and the database is corrupt, the following message is displayed:
rpmdb: Thread/process 13903/140194607871904 failed: Thread died in Berkeley DB library error: db3 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:
Commands such as “yum clean all” also fail with this message. To correct, move the RPM DB files to a temporary folder and rebuild the database with these 3 commands:
# mv /var/lib/rpm/__* ~ # rpm --rebuilddb # rpm -qa | wc -l 500
If successful, it is safe to delete the __* files from your temporary folder.