After downgrade facter to 1.7.1 the error is gone. Then I did the update again and the error was back again.
I have many server that already have the version 2.1, without an update. I don't understand why the update does not work. -- You received this message because you are subscribed to the Google Groups "Puppet Users" group. To unsubscribe from this group and stop receiving emails from it, send an email to puppet-users+unsubscr...@googlegroups.com. To view this discussion on the web visit https://groups.google.com/d/msgid/puppet-users/e6383291-1fee-4fe1-abf0-73f9e627e737%40googlegroups.com. For more options, visit https://groups.google.com/d/optout.
