centos upgrade命令失败

centos 使用yum -y upgrade命令失败 提示下面内容

 yum -y upgrade
error: rpmdb: BDB0113 Thread/process 7555/140000151713600 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:

解决方法是

cd /var/lib/rpm
rm -rf __db*
rpm --rebuilddb

再运行yum upgrade就可以正常使用