今天在使用yum的时候，突然鬼畜的出现这个问题。

提示为：

rpmdb: Thread/process 10462/139780351551392 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:

Error: rpmdb open failed

解决问题的办法很简单，百度到的解决办法：

rm -fr /var/lib/rpm/__db.*