Error: rpmdb: unable to join the environment error: db3 error(11) from dbenv->open: Resource temporarily unavailable

mkdir /root/backups.rpm
cp -avr /var/lib/rpm/ /root/backups.rpm

# rm -f /var/lib/rpm/__db*
# db_verify /var/lib/rpm/Packages
# rpm –rebuilddb
# yum clean all