Rpm errror about Lock table

If you ever get stuck in a situation like this, when anything you do with rpm reports errors in the Lock table, or in the database. eg:

rpmdb: Lock table is out of available locker entries
error: db4 error(22) from db->close: Invalid argument

That can be fixed:

• Make sure that yum is not running
• Make sure that rpm itself is not running
• Backup the Packages file from /var/lib/rpm
• Make yet another copy of the Packages file from /var/lib/rpm :D
• remove *all* files in /var/lib/rpm
• Copy the Packages file you backed up to /var/lib/rpm
• as root run : chown -R root:root /var/lib/rpm
• as root run : rpm --rebuilddb

That should be it, you can now use rpm and yum again.

- KB